| Line No. | Rev | Author | Line |
|---|---|---|---|
| 1 | 32 | kaklik | /****************************************************************************** |
| 2 | |||
| 3 | USB OTG Layer |
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| 4 | |||
| 5 | |||
| 6 | *******************************************************************************/ |
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| 7 | //DOM-IGNORE-BEGIN |
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| 8 | /****************************************************************************** |
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| 9 | |||
| 10 | File Name: usb_otg.c |
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| 11 | Dependencies: None |
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| 12 | Processor: PIC24F/PIC32MX |
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| 13 | Compiler: C30/C32 |
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| 14 | Company: Microchip Technology, Inc. |
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| 15 | |||
| 16 | Software License Agreement |
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| 17 | |||
| 18 | The software supplied herewith by Microchip Technology Incorporated |
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| 19 | (the Company) for its PICmicro® Microcontroller is intended and |
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| 20 | supplied to you, the Companys customer, for use solely and |
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| 21 | exclusively on Microchip PICmicro Microcontroller products. The |
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| 22 | software is owned by the Company and/or its supplier, and is |
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| 23 | protected under applicable copyright laws. All rights are reserved. |
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| 24 | Any use in violation of the foregoing restrictions may subject the |
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| 25 | user to criminal sanctions under applicable laws, as well as to |
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| 26 | civil liability for the breach of the terms and conditions of this |
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| 27 | license. |
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| 28 | |||
| 29 | THIS SOFTWARE IS PROVIDED IN AN AS IS CONDITION. NO WARRANTIES, |
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| 30 | WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING, BUT NOT LIMITED |
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| 31 | TO, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A |
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| 32 | PARTICULAR PURPOSE APPLY TO THIS SOFTWARE. THE COMPANY SHALL NOT, |
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| 33 | IN ANY CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL OR |
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| 34 | CONSEQUENTIAL DAMAGES, FOR ANY REASON WHATSOEVER. |
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| 35 | |||
| 36 | Change History: |
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| 37 | Rev Description |
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| 38 | ---------- ---------------------------------------------------------- |
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| 39 | 2.6 - 2.7a No change |
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| 40 | |||
| 41 | *******************************************************************************/ |
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| 42 | |||
| 43 | #include "GenericTypeDefs.h" |
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| 44 | #include "HardwareProfile.h" |
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| 45 | #include "Compiler.h" |
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| 46 | #include "usb_config.h" |
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| 47 | #include "USB/usb.h" |
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| 48 | //#include "USB/usb_device.h" |
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| 49 | //#include "USB/usb_host.h" |
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| 50 | #include "USB/usb_otg.h" |
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| 51 | #include "USB/usb_host_generic.h" |
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| 52 | #include "uart2.h" |
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| 53 | |||
| 54 | //#define DEBUG_MODE |
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| 55 | |||
| 56 | |||
| 57 | // ***************************************************************************** |
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| 58 | // ***************************************************************************** |
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| 59 | // Section: HNP Event Flow |
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| 60 | // ***************************************************************************** |
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| 61 | // ***************************************************************************** |
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| 62 | /* |
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| 63 | // ***************************************************************************** |
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| 64 | (A becomes Device, B becomes Host) |
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| 65 | A side(Host) B side(Device) |
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| 66 | // ***************************************************************************** |
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| 67 | Suspend-SelectRole(ROLE_DEVICE) -------> Idle-SelectRole(ROLE_HOST) |
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| 68 | Detach - OTG_EVENT_DISCONNECT <------- D+ Pullup Disabled |
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| 69 | D+ Pullup Enabled -------> Attach - OTG_EVENT_CONNECT |
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| 70 | |||
| 71 | // ***************************************************************************** |
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| 72 | (A becomes Host, B becomes Device) |
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| 73 | A side(Device) B side(Host) |
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| 74 | // ***************************************************************************** |
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| 75 | Idle-SelectRole(ROLE_HOST) <------- Suspend-SelectRole(ROLE_DEVICE) |
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| 76 | D+ Pullup Disabled -------> Detach - OTG_EVENT_DISCONNECT |
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| 77 | USGOTGInitializeHostStack() |
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| 78 | */ |
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| 79 | |||
| 80 | |||
| 81 | // ***************************************************************************** |
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| 82 | // Global Variables |
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| 83 | // ***************************************************************************** |
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| 84 | //DEFAULT_ROLE needs to be configured as ROLE_HOST or ROLE_DEVICE if not using a Micro AB OTG cable, see usb_config.h for configuring |
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| 85 | BYTE CurrentRole, DefaultRole; |
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| 86 | WORD HNPTimeOut, SRPTimeOut; |
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| 87 | BOOL HNPActive=0, SRPActive=0, SRPReady=0, HNPEnable=0, HNPSupport=0, HNPAltSupport=0, HNPTimeOutFlag=0, SRPTimeOutFlag=0; |
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| 88 | BOOL RoleSwitch=0; |
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| 89 | extern volatile WORD usbOverrideHostState; |
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| 90 | |||
| 91 | // ***************************************************************************** |
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| 92 | // Local Prototypes |
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| 93 | // ***************************************************************************** |
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| 94 | void USBOTGActivateSrp(); |
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| 95 | void USBOTGDeactivateSrp(); |
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| 96 | void USBOTGActivateHnp(); |
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| 97 | void USBOTGDisableInterrupts(); |
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| 98 | |||
| 99 | //DOM-IGNORE-BEGIN |
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| 100 | /**************************************************************************** |
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| 101 | Function: |
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| 102 | void USBOTGDisableInterrupts() |
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| 103 | |||
| 104 | Description: |
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| 105 | This function disables the apropriate interrupts |
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| 106 | |||
| 107 | Precondition: |
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| 108 | None |
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| 109 | |||
| 110 | Parameters: |
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| 111 | None |
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| 112 | |||
| 113 | Return Values: |
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| 114 | None |
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| 115 | |||
| 116 | Remarks: |
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| 117 | None |
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| 118 | ***************************************************************************/ |
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| 119 | //DOM-IGNORE-END |
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| 120 | void USBOTGDisableInterrupts() |
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| 121 | { |
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| 122 | #if defined(__C30__) |
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| 123 | //Disable All Interrupts |
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| 124 | IEC5 = 0; |
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| 125 | U1IR=0xFF; |
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| 126 | U1IE=0; |
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| 127 | U1OTGIE &= 0x8C; |
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| 128 | U1OTGIR = 0x7D; |
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| 129 | IFS5 = 0; |
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| 130 | #elif defined( __PIC32MX__ ) |
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| 131 | // Disable All Interrupts |
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| 132 | IEC1CLR = 0x02000000; |
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| 133 | U1IR=0xFF; |
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| 134 | U1IE=0; |
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| 135 | U1OTGIE &= 0x8C; |
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| 136 | U1OTGIR = 0x7D; |
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| 137 | IFS1CLR = 0x02000000; |
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| 138 | #endif |
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| 139 | } |
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| 140 | |||
| 141 | //DOM-IGNORE-BEGIN |
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| 142 | /**************************************************************************** |
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| 143 | Function: |
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| 144 | void InitializeDeviceStack() |
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| 145 | |||
| 146 | Description: |
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| 147 | This function initializes the device stack for use in an OTG application |
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| 148 | |||
| 149 | Precondition: |
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| 150 | None |
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| 151 | |||
| 152 | Parameters: |
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| 153 | None |
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| 154 | |||
| 155 | Return Values: |
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| 156 | None |
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| 157 | |||
| 158 | Remarks: |
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| 159 | None |
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| 160 | ***************************************************************************/ |
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| 161 | //DOM-IGNORE-END |
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| 162 | void USBOTGInitializeDeviceStack() |
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| 163 | { |
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| 164 | //Disable Interrupts |
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| 165 | USBOTGDisableInterrupts(); |
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| 166 | |||
| 167 | //Enable D+ Pullup |
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| 168 | U1OTGCONbits.DPPULUP = 1; |
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| 169 | |||
| 170 | //Disable D+ Pulldown |
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| 171 | U1OTGCONbits.DPPULDWN = 0; |
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| 172 | |||
| 173 | //Switch Role To Device |
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| 174 | CurrentRole = ROLE_DEVICE; |
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| 175 | |||
| 176 | //Ensure HNP/SRP Fail Timer Check Is Disabled |
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| 177 | U1OTGIEbits.T1MSECIE = 0; |
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| 178 | HNPTimeOutFlag = 0; |
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| 179 | SRPTimeOutFlag = 0; |
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| 180 | SRPReady = 0; |
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| 181 | |||
| 182 | //Initialize Device Stack |
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| 183 | USBDeviceInit(); |
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| 184 | |||
| 185 | //Call Device Tasks |
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| 186 | USBDeviceTasks(); |
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| 187 | |||
| 188 | //Deactivate HNP |
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| 189 | USBOTGDeactivateHnp(); |
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| 190 | |||
| 191 | //Disable HNP |
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| 192 | USBOTGDisableHnp(); |
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| 193 | |||
| 194 | //Set Role Switch Flag |
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| 195 | RoleSwitch = TRUE; |
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| 196 | } |
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| 197 | |||
| 198 | |||
| 199 | //DOM-IGNORE-BEGIN |
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| 200 | /**************************************************************************** |
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| 201 | Function: |
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| 202 | void InitializeHostStack() |
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| 203 | |||
| 204 | Description: |
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| 205 | This function initializes the host stack for use in an OTG application |
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| 206 | |||
| 207 | Precondition: |
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| 208 | None |
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| 209 | |||
| 210 | Parameters: |
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| 211 | None |
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| 212 | |||
| 213 | Return Values: |
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| 214 | None |
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| 215 | |||
| 216 | Remarks: |
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| 217 | None |
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| 218 | ***************************************************************************/ |
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| 219 | //DOM-IGNORE-END |
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| 220 | void USBOTGInitializeHostStack() |
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| 221 | { |
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| 222 | //Enable D+ Pulldown |
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| 223 | U1OTGCONbits.DPPULDWN = 1; |
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| 224 | |||
| 225 | //Disable D+ Pullup |
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| 226 | U1OTGCONbits.DPPULUP = 0; |
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| 227 | |||
| 228 | //Switch Role To Host |
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| 229 | CurrentRole = ROLE_HOST; |
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| 230 | |||
| 231 | //Ensure HNP/SRP Fail Timer Check Is Disabled |
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| 232 | U1OTGIEbits.T1MSECIE = 0; |
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| 233 | HNPTimeOutFlag = 0; |
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| 234 | SRPTimeOutFlag = 0; |
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| 235 | SRPReady = 0; |
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| 236 | |||
| 237 | //If A side Host Then |
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| 238 | if (DefaultRole == ROLE_HOST) |
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| 239 | { |
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| 240 | //Substate Initialize |
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| 241 | usbOverrideHostState = 0; |
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| 242 | USBHostTasks(); |
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| 243 | } |
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| 244 | |||
| 245 | //If B side, Host Stack Needs To Be Manually Initialized Here To Perfom Reset Within TB_ACON_BSE0 (1ms Max) |
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| 246 | else if (DefaultRole == ROLE_DEVICE) |
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| 247 | { |
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| 248 | //Substate Initialize |
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| 249 | usbOverrideHostState = 0; |
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| 250 | USBHostTasks(); |
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| 251 | |||
| 252 | //Issue Power On |
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| 253 | usbOverrideHostState = 0x0020; |
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| 254 | USBHostTasks(); |
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| 255 | |||
| 256 | //Issue Reset |
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| 257 | usbOverrideHostState = 0x0110; |
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| 258 | USBHostTasks(); |
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| 259 | } |
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| 260 | |||
| 261 | //Deactivate HNP |
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| 262 | USBOTGDeactivateHnp(); |
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| 263 | |||
| 264 | //Disable HNP |
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| 265 | USBOTGDisableHnp(); |
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| 266 | |||
| 267 | //Set Role Switch Flag |
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| 268 | RoleSwitch = TRUE; |
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| 269 | } |
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| 270 | |||
| 271 | |||
| 272 | //DOM-IGNORE-BEGIN |
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| 273 | /**************************************************************************** |
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| 274 | Function: |
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| 275 | void USBOTGInitialize() |
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| 276 | |||
| 277 | Description: |
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| 278 | This function initializes an OTG application and initializes a default role of Host or Device |
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| 279 | |||
| 280 | Precondition: |
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| 281 | None |
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| 282 | |||
| 283 | Parameters: |
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| 284 | None |
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| 285 | |||
| 286 | Return Values: |
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| 287 | None |
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| 288 | |||
| 289 | Remarks: |
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| 290 | #define USB_MICRO_AB_OTG_CABLE should be commented out in usb_config.h |
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| 291 | if not using a micro AB OTG cable |
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| 292 | ***************************************************************************/ |
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| 293 | //DOM-IGNORE-END |
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| 294 | void USBOTGInitialize() |
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| 295 | { |
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| 296 | #ifdef USB_MICRO_AB_OTG_CABLE |
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| 297 | //Power Up Module |
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| 298 | U1PWRCbits.USBPWR = 1; |
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| 299 | |||
| 300 | //Ensure Fail Timer Check Is Disabled |
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| 301 | U1OTGIEbits.T1MSECIE = 0; |
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| 302 | HNPTimeOutFlag = 0; |
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| 303 | SRPTimeOutFlag = 0; |
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| 304 | SRPReady = 0; |
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| 305 | |||
| 306 | #if defined(__C30__) |
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| 307 | //Configure VBUS I/O |
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| 308 | PORTGbits.RG12 = 0; |
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| 309 | LATGbits.LATG12 = 0; |
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| 310 | TRISGbits.TRISG12 = 0; |
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| 311 | #elif defined(__PIC32MX__) |
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| 312 | VBUS_Off; |
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| 313 | #endif |
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| 314 | |||
| 315 | //Initialize VB_SESS_END Interrupt |
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| 316 | U1OTGIR = 0x04; |
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| 317 | U1OTGIEbits.SESENDIE = 1; |
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| 318 | |||
| 319 | //Disable HNP |
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| 320 | USBOTGDisableHnp(); |
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| 321 | |||
| 322 | //Deactivate HNP |
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| 323 | USBOTGDeactivateHnp(); |
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| 324 | |||
| 325 | //Enable OTG Features |
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| 326 | U1OTGCONbits.OTGEN = 1; |
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| 327 | |||
| 328 | //Enable D- Pulldown |
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| 329 | U1OTGCONbits.DMPULDWN = 1; |
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| 330 | |||
| 331 | //Clear ID Flag |
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| 332 | U1OTGIR = 0x80; |
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| 333 | |||
| 334 | //Delay Some Time For Module To Detect Cable |
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| 335 | USBOTGDelayMs(40); |
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| 336 | |||
| 337 | //Clear ID Flag |
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| 338 | U1OTGIR = 0x80; |
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| 339 | |||
| 340 | //Enable ID Interrupt |
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| 341 | U1OTGIEbits.IDIE = 1; |
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| 342 | |||
| 343 | //If "A" side Plug Then |
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| 344 | if (U1OTGSTATbits.ID == CABLE_A_SIDE) |
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| 345 | { |
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| 346 | #ifdef DEBUG_MODE |
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| 347 | UART2PrintString( "\r\n***** USB OTG Initialize A Side**********\r\n" ); |
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| 348 | #endif |
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| 349 | |||
| 350 | //Configure Default Host Role |
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| 351 | DefaultRole=ROLE_HOST; |
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| 352 | CurrentRole=DefaultRole; |
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| 353 | |||
| 354 | //Set Role Switch Flag |
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| 355 | RoleSwitch = TRUE; |
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| 356 | |||
| 357 | //Initialize Host Stack |
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| 358 | USBOTGInitializeHostStack(); |
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| 359 | |||
| 360 | //Start Session |
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| 361 | USBOTGSession(START_SESSION); |
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| 362 | } |
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| 363 | |||
| 364 | //Else, "B" side Plug |
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| 365 | else |
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| 366 | { |
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| 367 | #ifdef DEBUG_MODE |
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| 368 | UART2PrintString( "\r\n***** USB OTG Initialize B Side**********\r\n" ); |
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| 369 | #endif |
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| 370 | |||
| 371 | //Configure Default Device Role |
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| 372 | DefaultRole=ROLE_DEVICE; |
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| 373 | CurrentRole=DefaultRole; |
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| 374 | |||
| 375 | //Set Role Switch Flag |
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| 376 | RoleSwitch = TRUE; |
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| 377 | |||
| 378 | //Initialize Device Stack |
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| 379 | USBOTGInitializeDeviceStack(); |
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| 380 | } |
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| 381 | |||
| 382 | #else |
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| 383 | //Power Up Module |
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| 384 | U1PWRCbits.USBPWR = 1; |
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| 385 | |||
| 386 | //Ensure HNP Fail Timer Check Is Disabled |
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| 387 | U1OTGIEbits.T1MSECIE = 0; |
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| 388 | HNPTimeOutFlag = 0; |
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| 389 | SRPTimeOutFlag = 0; |
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| 390 | SRPReady = 0; |
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| 391 | |||
| 392 | #if defined(__C30__) |
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| 393 | //Configure VBUS I/O |
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| 394 | PORTGbits.RG12 = 0; |
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| 395 | LATGbits.LATG12 = 0; |
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| 396 | TRISGbits.TRISG12 = 0; |
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| 397 | #elif defined(__PIC32MX__) |
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| 398 | VBUS_Off; |
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| 399 | #endif |
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| 400 | |||
| 401 | //Disable HNP |
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| 402 | USBOTGDisableHnp(); |
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| 403 | |||
| 404 | //Deactivate HNP |
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| 405 | USBOTGDeactivateHnp(); |
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| 406 | |||
| 407 | //Enable OTG Features |
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| 408 | U1OTGCONbits.OTGEN = 1; |
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| 409 | |||
| 410 | //Enable D- Pulldown |
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| 411 | U1OTGCONbits.DMPULDWN = 1; |
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| 412 | |||
| 413 | DefaultRole = DEFAULT_ROLE; |
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| 414 | CurrentRole = DefaultRole; |
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| 415 | |||
| 416 | if (CurrentRole == ROLE_HOST) |
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| 417 | { |
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| 418 | #ifdef DEBUG_MODE |
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| 419 | UART2PrintString( "\r\n***** USB OTG Initialize A Side**********\r\n" ); |
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| 420 | #endif |
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| 421 | |||
| 422 | //Set Role Switch Flag |
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| 423 | RoleSwitch = TRUE; |
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| 424 | |||
| 425 | //Initialize Host Stack |
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| 426 | USBOTGInitializeHostStack(); |
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| 427 | |||
| 428 | //Start Session |
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| 429 | USBOTGSession(START_SESSION); |
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| 430 | } |
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| 431 | |||
| 432 | else if (CurrentRole == ROLE_DEVICE) |
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| 433 | { |
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| 434 | #ifdef DEBUG_MODE |
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| 435 | UART2PrintString( "\r\n***** USB OTG Initialize B Side**********\r\n" ); |
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| 436 | #endif |
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| 437 | |||
| 438 | //Set Role Switch Flag |
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| 439 | RoleSwitch = TRUE; |
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| 440 | |||
| 441 | //Initialize Device Stack |
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| 442 | USBOTGInitializeDeviceStack(); |
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| 443 | } |
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| 444 | #endif |
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| 445 | |||
| 446 | } |
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| 447 | |||
| 448 | |||
| 449 | //DOM-IGNORE-BEGIN |
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| 450 | /**************************************************************************** |
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| 451 | Function: |
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| 452 | void USBOTGSelectRole(BOOL role) |
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| 453 | |||
| 454 | Description: |
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| 455 | This function initiates a role switch. The parameter role that is passed to this function |
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| 456 | is the desired role to switch to. |
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| 457 | |||
| 458 | Precondition: |
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| 459 | None |
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| 460 | |||
| 461 | Parameters: |
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| 462 | BOOL role - ROLE_DEVICE or ROLE_HOST |
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| 463 | |||
| 464 | Return Values: |
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| 465 | None |
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| 466 | |||
| 467 | Remarks: |
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| 468 | None |
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| 469 | ***************************************************************************/ |
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| 470 | //DOM-IGNORE-END |
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| 471 | void USBOTGSelectRole(BOOL role) |
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| 472 | { |
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| 473 | //If HNP Is Enabled Then |
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| 474 | if (HNPEnable) |
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| 475 | { |
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| 476 | //If Currentrole=Host and role=Device Then |
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| 477 | if(CurrentRole == ROLE_HOST && role == ROLE_DEVICE) |
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| 478 | { |
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| 479 | //If Session Is Valid Then |
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| 480 | if (USBOTGGetSessionStatus()) |
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| 481 | { |
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| 482 | #ifdef DEBUG_MODE |
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| 483 | if (DefaultRole == ROLE_HOST) |
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| 484 | { |
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| 485 | UART2PrintString( "\r\n*****USB OTG A Event - HNP - A Host Suspend *****\r\n" ); |
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| 486 | } |
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| 487 | else if (DefaultRole == ROLE_DEVICE) |
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| 488 | { |
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| 489 | UART2PrintString( "\r\n***** USB OTG B Event - HNP - B Host Suspend *****\r\n" ); |
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| 490 | } |
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| 491 | #endif |
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| 492 | |||
| 493 | //Disable Interrupts |
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| 494 | USBOTGDisableInterrupts(); |
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| 495 | |||
| 496 | //If A side Host Then |
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| 497 | if (DefaultRole == ROLE_HOST) |
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| 498 | { |
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| 499 | //Configure Timer For TA_AIDL_BDIS |
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| 500 | HNPTimeOut = DELAY_TA_AIDL_BDIS; |
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| 501 | HNPTimeOutFlag = 1; |
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| 502 | |||
| 503 | //Enable 1ms Timer Interrupt |
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| 504 | U1OTGIR = 0x40; |
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| 505 | U1OTGIEbits.T1MSECIE = 1; |
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| 506 | |||
| 507 | //Enable Resume Signaling Interrupt |
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| 508 | U1IR = 0x20; |
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| 509 | U1IEbits.RESUMEIE = 1; |
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| 510 | } |
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| 511 | |||
| 512 | //Enable Detach Interrupt |
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| 513 | U1IR = 0x01; |
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| 514 | U1IEbits.DETACHIE = 1; |
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| 515 | |||
| 516 | //Enable USB Interrupt |
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| 517 | #if defined(__C30__) |
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| 518 | IFS5 &= 0xFFBF; |
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| 519 | IEC5 |= 0x0040; |
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| 520 | #elif defined(__PIC32MX__) |
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| 521 | IFS1CLR = 0x02000000; |
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| 522 | IPC11CLR = 0x0000FF00; |
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| 523 | IPC11SET = 0x00001000; |
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| 524 | IEC1SET = 0x02000000; |
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| 525 | #endif |
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| 526 | |||
| 527 | //Activate Hnp (Used to capture an OTG_EVENT_DISCONNECT) |
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| 528 | USBOTGActivateHnp(); |
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| 529 | |||
| 530 | //Suspend Bus |
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| 531 | U1CONbits.SOFEN = 0; |
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| 532 | |||
| 533 | //Put the state machine in suspend mode. |
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| 534 | usbOverrideHostState = 0x410; |
||
| 535 | } |
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| 536 | |||
| 537 | //If Session Is Invalid Then |
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| 538 | else |
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| 539 | { |
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| 540 | //Display Some Debug Messages |
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| 541 | #ifdef DEBUG_MODE |
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| 542 | if (DefaultRole == ROLE_HOST) |
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| 543 | { |
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| 544 | UART2PrintString( "\r\n*****USB OTG A Error - Session Is Invalid - Cannot Suspend *****\r\n" ); |
||
| 545 | } |
||
| 546 | else if (DefaultRole == ROLE_DEVICE) |
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| 547 | { |
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| 548 | UART2PrintString( "\r\n***** USB OTG B Error - Session Is Invalid - Cannot Suspend *****\r\n" ); |
||
| 549 | } |
||
| 550 | #endif |
||
| 551 | } |
||
| 552 | } |
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| 553 | |||
| 554 | //Else If Currentrole=Device and role=Host Then |
||
| 555 | else if (CurrentRole == ROLE_DEVICE && role == ROLE_HOST) |
||
| 556 | { |
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| 557 | //If B Side Device Then |
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| 558 | if (DefaultRole == ROLE_DEVICE) |
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| 559 | { |
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| 560 | //Delay 4 < time < 150ms IDLE time (TB_AIDL_BDIS) |
||
| 561 | USBOTGDelayMs(DELAY_TB_AIDL_BDIS); |
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| 562 | } |
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| 563 | |||
| 564 | //If A side Device Then |
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| 565 | else if (DefaultRole == ROLE_HOST) |
||
| 566 | { |
||
| 567 | //Delay 3 < time < 200ms IDLE time (TA_BIDL_ADIS) |
||
| 568 | USBOTGDelayMs(DELAY_TA_BIDL_ADIS); |
||
| 569 | } |
||
| 570 | |||
| 571 | //Disable Interrupts |
||
| 572 | USBOTGDisableInterrupts(); |
||
| 573 | |||
| 574 | //If B side Device Then |
||
| 575 | if (DefaultRole == ROLE_DEVICE) |
||
| 576 | { |
||
| 577 | //Activate HNP (Used to capture an OTG_EVENT_CONNECT event) |
||
| 578 | USBOTGActivateHnp(); |
||
| 579 | |||
| 580 | //Configure Timer For TB_ASE0_BRST Check |
||
| 581 | HNPTimeOut = DELAY_TB_ASE0_BRST; |
||
| 582 | HNPTimeOutFlag = 1; |
||
| 583 | |||
| 584 | //Enable 1ms Timer Interrupt |
||
| 585 | U1OTGIR = 0x40; |
||
| 586 | U1OTGIEbits.T1MSECIE = 1; |
||
| 587 | |||
| 588 | //Disable Device Mode |
||
| 589 | U1CONbits.USBEN=0; |
||
| 590 | |||
| 591 | //Enable Host Mode |
||
| 592 | U1CONbits.HOSTEN = 1; |
||
| 593 | |||
| 594 | //Enable Attach Interrupt to capture OTG_EVENT_CONNECT from other side |
||
| 595 | U1IR = 0x40; |
||
| 596 | U1IEbits.ATTACHIE = 1; |
||
| 597 | |||
| 598 | //Cause an OTG_EVENT_DISCONNECT on other side of cable by |
||
| 599 | //disabling D+ Pullup Resistor |
||
| 600 | U1OTGCONbits.DPPULUP = 0; |
||
| 601 | U1OTGCONbits.DPPULDWN = 1; |
||
| 602 | |||
| 603 | //Wait For Line To Discharge To SE0 State |
||
| 604 | while(U1CONbits.SE0 == 0) |
||
| 605 | {} |
||
| 606 | |||
| 607 | //Clear Attach Interrupt |
||
| 608 | U1IR = 0x40; |
||
| 609 | |||
| 610 | //Enable USB Interrupt |
||
| 611 | #if defined(__C30__) |
||
| 612 | IFS5 &= 0xFFBF; |
||
| 613 | IEC5 |= 0x0040; |
||
| 614 | #elif defined(__PIC32MX__) |
||
| 615 | IFS1CLR = 0x02000000; |
||
| 616 | IPC11CLR = 0x0000FF00; |
||
| 617 | IPC11SET = 0x00001000; |
||
| 618 | IEC1SET = 0x02000000; |
||
| 619 | #endif |
||
| 620 | } |
||
| 621 | |||
| 622 | //If A side Device Then |
||
| 623 | else if (DefaultRole == ROLE_HOST) |
||
| 624 | { |
||
| 625 | #ifdef DEBUG_MODE |
||
| 626 | UART2PrintString( "\r\n***** USB OTG A Event - Role Switch - Device -> Host *****\r\n" ); |
||
| 627 | #endif |
||
| 628 | |||
| 629 | //Initialize Host Stack |
||
| 630 | USBOTGInitializeHostStack(); |
||
| 631 | } |
||
| 632 | } |
||
| 633 | } |
||
| 634 | |||
| 635 | //Handles Case If B side Abruptly Ends Role As Host Without Sending A Set Feature |
||
| 636 | else if (CurrentRole == ROLE_DEVICE && DefaultRole == ROLE_HOST) |
||
| 637 | { |
||
| 638 | #ifdef DEBUG_MODE |
||
| 639 | UART2PrintString( "\r\n***** USB OTG A Event - Role Switch - Device -> Host *****\r\n" ); |
||
| 640 | #endif |
||
| 641 | |||
| 642 | //Disable Interrupts |
||
| 643 | USBOTGDisableInterrupts(); |
||
| 644 | |||
| 645 | //Delay 3 < time < 200ms IDLE time (TA_BIDL_ADIS) |
||
| 646 | USBOTGDelayMs(DELAY_TA_BIDL_ADIS); |
||
| 647 | |||
| 648 | //Switch Back To Host |
||
| 649 | USBOTGInitializeHostStack(); |
||
| 650 | } |
||
| 651 | } |
||
| 652 | |||
| 653 | |||
| 654 | //DOM-IGNORE-BEGIN |
||
| 655 | /**************************************************************************** |
||
| 656 | Function: |
||
| 657 | BOOL USBOTGRequestSession() |
||
| 658 | |||
| 659 | Description: |
||
| 660 | This function requests a Session from an A side Host using SRP. The function will return |
||
| 661 | TRUE if the request was successful or FALSE otherwise. |
||
| 662 | |||
| 663 | Precondition: |
||
| 664 | None |
||
| 665 | |||
| 666 | Parameters: |
||
| 667 | None |
||
| 668 | |||
| 669 | Return Values: |
||
| 670 | TRUE or FALSE |
||
| 671 | |||
| 672 | Remarks: |
||
| 673 | This function should only be called by a B side Device. |
||
| 674 | ***************************************************************************/ |
||
| 675 | //DOM-IGNORE-END |
||
| 676 | BOOL USBOTGRequestSession() |
||
| 677 | { |
||
| 678 | //If B side Device Then |
||
| 679 | if (DefaultRole == ROLE_DEVICE) |
||
| 680 | { |
||
| 681 | //If Session Is Invalid and SRP Is Not In Progress Then |
||
| 682 | if (!USBOTGGetSessionStatus() && SRPReady == 0) |
||
| 683 | { |
||
| 684 | UART2PrintString( "\r\n***** USB OTG B Event - SRP - Trying To Request Session *****\r\n" ); |
||
| 685 | |||
| 686 | //Initial Conditions Check |
||
| 687 | //Discharge VBUS |
||
| 688 | USBOTGDischargeVBus(); |
||
| 689 | |||
| 690 | //Ensure single ended zero state for 2ms (TB_SE0_SRP) |
||
| 691 | if (U1CONbits.SE0 == 1) |
||
| 692 | { |
||
| 693 | //Delay TB_SE0_SRP |
||
| 694 | USBOTGDelayMs(DELAY_TB_SE0_SRP); |
||
| 695 | |||
| 696 | //If Not Single ended zero and line has been stable Then |
||
| 697 | if (U1OTGSTATbits.LSTATE == 1 && U1CONbits.SE0 != 1) |
||
| 698 | { |
||
| 699 | //Display Error Message |
||
| 700 | UART2PrintString( "\r\n***** USB OTG B Error - SRP No SE0 - Cannot Request Session*****\r\n" ); |
||
| 701 | return FALSE; |
||
| 702 | } |
||
| 703 | } |
||
| 704 | else |
||
| 705 | { |
||
| 706 | //Display Error Message |
||
| 707 | UART2PrintString( "\r\n***** USB OTG B Error - SRP No SE0 - Cannot Request Session*****\r\n" ); |
||
| 708 | return FALSE; |
||
| 709 | } |
||
| 710 | |||
| 711 | //D+ Pulsing |
||
| 712 | #ifdef DEBUG_MODE |
||
| 713 | UART2PrintString( "\r\n***** USB OTG B Event - SRP - D+ Pulsing*****\r\n" ); |
||
| 714 | #endif |
||
| 715 | |||
| 716 | //Ensure OTG Bit Is Set |
||
| 717 | U1OTGCONbits.OTGEN = 1; |
||
| 718 | |||
| 719 | //Disable D+ Pulldown |
||
| 720 | U1OTGCONbits.DPPULDWN = 0; |
||
| 721 | |||
| 722 | //Enable D+ Pullup |
||
| 723 | U1OTGCONbits.DPPULUP = 1; |
||
| 724 | |||
| 725 | //5ms <= Delay < 10ms (TB_DATA_PLS) |
||
| 726 | USBOTGDelayMs(DELAY_TB_DATA_PLS); |
||
| 727 | |||
| 728 | //Disable D+ Pullup |
||
| 729 | U1OTGCONbits.DPPULUP = 0; |
||
| 730 | |||
| 731 | //VBUS Pulsing |
||
| 732 | #ifdef DEBUG_MODE |
||
| 733 | UART2PrintString( "\r\n***** USB OTG B Event - SRP - VBUS Pulsing*****\r\n" ); |
||
| 734 | #endif |
||
| 735 | //Delay 10ms To Give A side Time To Get Ready For VBUS Pulsing |
||
| 736 | USBOTGDelayMs(10); |
||
| 737 | |||
| 738 | //Enable VBUS |
||
| 739 | VBUS_On; |
||
| 740 | |||
| 741 | //Delay 1ms |
||
| 742 | USBOTGDelayMs(1); |
||
| 743 | |||
| 744 | //Disable VBUS |
||
| 745 | VBUS_Off; |
||
| 746 | |||
| 747 | //Discharge VBUS |
||
| 748 | U1OTGCONbits.VBUSDIS = 1; |
||
| 749 | |||
| 750 | //Delay some time to allow VBUS to settle |
||
| 751 | USBOTGDelayMs(DELAY_VBUS_SETTLE); |
||
| 752 | |||
| 753 | //Disable Discharge Bit |
||
| 754 | U1OTGCONbits.VBUSDIS = 0; |
||
| 755 | |||
| 756 | //Configure Timer For TB_SRP_FAIL Check |
||
| 757 | SRPTimeOut = (DELAY_TB_SRP_FAIL - DELAY_VBUS_SETTLE); |
||
| 758 | SRPTimeOutFlag = 1; |
||
| 759 | |||
| 760 | //Enable 1ms Timer Interrupt |
||
| 761 | U1OTGIR = 0x40; |
||
| 762 | U1OTGIEbits.T1MSECIE = 1; |
||
| 763 | |||
| 764 | //Indicate SRP Is Ready |
||
| 765 | SRPReady = 1; |
||
| 766 | |||
| 767 | return TRUE; |
||
| 768 | } |
||
| 769 | else |
||
| 770 | { |
||
| 771 | //Session Is Still Active |
||
| 772 | UART2PrintString( "\r\n***** USB OTG B Error - Request Session Failed - Session Is Already Active *****\r\n" ); |
||
| 773 | |||
| 774 | return FALSE; |
||
| 775 | } |
||
| 776 | } |
||
| 777 | |||
| 778 | //Should Never Get Here Unless This Function Is Called By A-side |
||
| 779 | return FALSE; |
||
| 780 | } |
||
| 781 | |||
| 782 | |||
| 783 | //DOM-IGNORE-BEGIN |
||
| 784 | /**************************************************************************** |
||
| 785 | Function: |
||
| 786 | BOOL USBOTGGetSessionStatus() |
||
| 787 | |||
| 788 | Description: |
||
| 789 | This function gets a session status. The function will return |
||
| 790 | TRUE if VBUS > Session Valid Voltage or FALSE if VBUS < Session Valid Voltage. |
||
| 791 | |||
| 792 | Precondition: |
||
| 793 | None |
||
| 794 | |||
| 795 | Parameters: |
||
| 796 | None |
||
| 797 | |||
| 798 | Return Values: |
||
| 799 | TRUE or FALSE |
||
| 800 | |||
| 801 | Remarks: |
||
| 802 | |||
| 803 | ***************************************************************************/ |
||
| 804 | //DOM-IGNORE-END |
||
| 805 | BOOL USBOTGGetSessionStatus() |
||
| 806 | { |
||
| 807 | //If VBUS < VA_SESS_VLD Then |
||
| 808 | if (U1OTGSTATbits.SESVD == 0) |
||
| 809 | { |
||
| 810 | //Session Invalid |
||
| 811 | return FALSE; |
||
| 812 | } |
||
| 813 | else |
||
| 814 | { |
||
| 815 | //Session Valid |
||
| 816 | return TRUE; |
||
| 817 | } |
||
| 818 | } |
||
| 819 | |||
| 820 | |||
| 821 | //DOM-IGNORE-BEGIN |
||
| 822 | /**************************************************************************** |
||
| 823 | Function: |
||
| 824 | void USBOTGDischargeVBus() |
||
| 825 | |||
| 826 | Description: |
||
| 827 | This function discharges VBUS. |
||
| 828 | |||
| 829 | Precondition: |
||
| 830 | None |
||
| 831 | |||
| 832 | Parameters: |
||
| 833 | None |
||
| 834 | |||
| 835 | Return Values: |
||
| 836 | None |
||
| 837 | |||
| 838 | Remarks: |
||
| 839 | |||
| 840 | ***************************************************************************/ |
||
| 841 | //DOM-IGNORE-END |
||
| 842 | void USBOTGDischargeVBus() |
||
| 843 | { |
||
| 844 | //Enable VBUS Discharge Enable Bit |
||
| 845 | U1OTGCONbits.VBUSDIS = 1; |
||
| 846 | |||
| 847 | //Delay 50ms |
||
| 848 | //8k pulldown internal to device + ~60k on the board = ~7k, 6.2uF, time to discharge is ~50ms |
||
| 849 | USBOTGDelayMs(50); |
||
| 850 | |||
| 851 | //Disable VBUS Discharge Bit |
||
| 852 | U1OTGCONbits.VBUSDIS = 0; |
||
| 853 | } |
||
| 854 | |||
| 855 | |||
| 856 | //DOM-IGNORE-BEGIN |
||
| 857 | /**************************************************************************** |
||
| 858 | Function: |
||
| 859 | void USBOTGSession(BYTE Value) |
||
| 860 | |||
| 861 | Description: |
||
| 862 | This function starts, ends, or toggles a VBUS session. |
||
| 863 | |||
| 864 | Precondition: |
||
| 865 | This function assumes I/O controlling DC/DC converter has already been initialized |
||
| 866 | |||
| 867 | Parameters: |
||
| 868 | Value - START_SESSION, END_SESSION, TOGGLE_SESSION |
||
| 869 | |||
| 870 | Return Values: |
||
| 871 | TRUE - Session Started, FALSE - Session Not Started |
||
| 872 | |||
| 873 | Remarks: |
||
| 874 | ***************************************************************************/ |
||
| 875 | //DOM-IGNORE-END |
||
| 876 | BOOL USBOTGSession(BYTE Value) |
||
| 877 | { |
||
| 878 | //If START_SESSION or (TOGGLE_SESSION and VBUS Is Off) |
||
| 879 | if (Value == START_SESSION || (Value == TOGGLE_SESSION && VBUS_Status == 0)) |
||
| 880 | { |
||
| 881 | //Enable VBUS |
||
| 882 | VBUS_On; |
||
| 883 | |||
| 884 | //Wait 100ms for VBUS to rise (TA_WAIT_VRISE) |
||
| 885 | USBOTGDelayMs(DELAY_TA_WAIT_VRISE); |
||
| 886 | |||
| 887 | //If PGOOD Is Still Low Then |
||
| 888 | if (PGOOD == 0) |
||
| 889 | { |
||
| 890 | //Disable VBUS |
||
| 891 | VBUS_Off; |
||
| 892 | |||
| 893 | //Indicate Error Message |
||
| 894 | UART2PrintString( "\r\n*****USB OTG A Error - VBUS Rise Time - B Device Not Supported *****\r\n" ); |
||
| 895 | |||
| 896 | return FALSE; |
||
| 897 | } |
||
| 898 | |||
| 899 | //If PGOOD is High Then |
||
| 900 | else |
||
| 901 | { |
||
| 902 | #ifdef OVERCURRENT_DETECTION |
||
| 903 | #if defined(__C30__) |
||
| 904 | //Enable Change Notification For Overcurrent Detection |
||
| 905 | CNEN6bits.CN80IE = 1; |
||
| 906 | IFS1bits.CNIF = 0; |
||
| 907 | IEC1bits.CNIE = 1; |
||
| 908 | IPC4bits.CNIP = 7; |
||
| 909 | #elif defined(__PIC32MX__) |
||
| 910 | BYTE temp; |
||
| 911 | //Enable Change Notification For Overcurrent Detection |
||
| 912 | CNCONSET = 0x00008000; // Enable Change Notice module |
||
| 913 | CNENSET= 0x00000004; // Enable CN2 |
||
| 914 | PORTB = temp; |
||
| 915 | IPC6SET = 0x00140000; // Set priority level=5 |
||
| 916 | IPC6SET = 0x00030000; // Set subpriority level=3 |
||
| 917 | IFS1CLR = 0x00000001; // Clear the interrupt flag status bit |
||
| 918 | IEC1SET = 0x00000001; // Enable Change Notice interrupts |
||
| 919 | #endif |
||
| 920 | #endif |
||
| 921 | |||
| 922 | #ifdef DEBUG_MODE |
||
| 923 | //Indicate Success |
||
| 924 | UART2PrintString( "\r\n***** USB OTG A Event - Session Started *****\r\n" ); |
||
| 925 | #endif |
||
| 926 | } |
||
| 927 | |||
| 928 | } |
||
| 929 | |||
| 930 | //If END_SESSION or (TOGGLE_SESSION and VBUS Is On) |
||
| 931 | else if (Value == END_SESSION || (Value == TOGGLE_SESSION && VBUS_Status == 1)) |
||
| 932 | { |
||
| 933 | #ifdef OVERCURRENT_DETECTION |
||
| 934 | #if defined(__C30__) |
||
| 935 | //Disable Change Notification For Overcurrent Detection |
||
| 936 | IEC1bits.CNIE = 0; |
||
| 937 | CNEN6bits.CN80IE = 0; |
||
| 938 | #elif defined(__PIC32MX__) |
||
| 939 | BYTE temp; |
||
| 940 | // Disable Change Notification |
||
| 941 | IEC1CLR = 0x00000001; |
||
| 942 | CNENCLR= 0x00000004; |
||
| 943 | PORTB = temp; |
||
| 944 | #endif |
||
| 945 | #endif |
||
| 946 | |||
| 947 | //Disable VBUS |
||
| 948 | VBUS_Off; |
||
| 949 | |||
| 950 | #ifdef DEBUG_MODE |
||
| 951 | if (DefaultRole == ROLE_HOST) |
||
| 952 | { |
||
| 953 | UART2PrintString( "\r\n***** USB OTG A Event - Session Ended *****\r\n" ); |
||
| 954 | } |
||
| 955 | #endif |
||
| 956 | } |
||
| 957 | |||
| 958 | return TRUE; |
||
| 959 | } |
||
| 960 | |||
| 961 | |||
| 962 | //DOM-IGNORE-BEGIN |
||
| 963 | /**************************************************************************** |
||
| 964 | Function: |
||
| 965 | void USB_OTGEventHandler ( BYTE address, BYTE event, void *data, DWORD size ) |
||
| 966 | |||
| 967 | Description: |
||
| 968 | This function is the event handler used by both the Host and Device stacks for calling the OTG layer |
||
| 969 | when SRP and HNP events occur |
||
| 970 | |||
| 971 | Precondition: |
||
| 972 | None |
||
| 973 | |||
| 974 | Parameters: |
||
| 975 | BYTE event - |
||
| 976 | OTG_EVENT_SRP_DPLUS_HIGH |
||
| 977 | OTG_EVENT_SRP_DPLUS_LOW |
||
| 978 | OTG_EVENT_SRP_VBUS_HIGH |
||
| 979 | OTG_EVENT_SRP_VBUS_LOW |
||
| 980 | OTG_EVENT_DISCONNECT |
||
| 981 | OTG_EVENT_CONNECT |
||
| 982 | OTG_EVENT_HNP_ABORT |
||
| 983 | OTG_EVENT_HNP_FAILED |
||
| 984 | |||
| 985 | Return Values: |
||
| 986 | None |
||
| 987 | |||
| 988 | Remarks: |
||
| 989 | None |
||
| 990 | ***************************************************************************/ |
||
| 991 | //DOM-IGNORE-END |
||
| 992 | void USB_OTGEventHandler ( BYTE address, BYTE event, void *data, DWORD size ) |
||
| 993 | { |
||
| 994 | switch(event) |
||
| 995 | { |
||
| 996 | case OTG_EVENT_SRP_DPLUS_HIGH: //SRP D+ High Event (Caused by ATTACHIF) |
||
| 997 | //If A side Host Then |
||
| 998 | if (DefaultRole == ROLE_HOST) |
||
| 999 | { |
||
| 1000 | //If Session Is Invalid and VBUS is turned off (For Detecting D+ SRP Pulsing) then |
||
| 1001 | if (!USBOTGGetSessionStatus() && VBUS_Status == 0) |
||
| 1002 | { |
||
| 1003 | //If Full Speed Device That Is Performing the SRP Then |
||
| 1004 | if (U1OTGSTATbits.LSTATE == 1 && U1CONbits.JSTATE == 1) |
||
| 1005 | { |
||
| 1006 | #ifdef DEBUG_MODE |
||
| 1007 | UART2PrintString( "\r\n***** USB OTG A Event - SRP - D+ High *****\r\n" ); |
||
| 1008 | #endif |
||
| 1009 | |||
| 1010 | //Enable Session Valid Change Interrupt To Capture VBUS > VA_SESS_VLD |
||
| 1011 | U1OTGIR = 0x08; |
||
| 1012 | U1OTGIEbits.SESVDIE = 1; |
||
| 1013 | |||
| 1014 | //Activate SRP |
||
| 1015 | USBOTGActivateSrp(); |
||
| 1016 | } |
||
| 1017 | else |
||
| 1018 | { |
||
| 1019 | //Deactivate SRP |
||
| 1020 | USBOTGDeactivateSrp(); |
||
| 1021 | |||
| 1022 | //Indicate Error Message |
||
| 1023 | UART2PrintString( "\r\n***** USB OTG A Error - SRP - Low Speed Unsupported Device*****\r\n" ); |
||
| 1024 | } |
||
| 1025 | } |
||
| 1026 | } |
||
| 1027 | break; |
||
| 1028 | |||
| 1029 | case OTG_EVENT_SRP_DPLUS_LOW: //SRP D+ Low Event (Caused by DETACHIF) |
||
| 1030 | //If SRP Is Active Then |
||
| 1031 | if (SRPActive) |
||
| 1032 | { |
||
| 1033 | #ifdef DEBUG_MODE |
||
| 1034 | UART2PrintString( "\r\n***** USB OTG A Event - SRP - D+ Low *****\r\n" ); |
||
| 1035 | #endif |
||
| 1036 | } |
||
| 1037 | break; |
||
| 1038 | |||
| 1039 | case OTG_EVENT_SRP_VBUS_HIGH: //SRP VBUS > VA_SESS_VLD Event (Caused by SESVDIF) |
||
| 1040 | if (SRPActive) |
||
| 1041 | { |
||
| 1042 | #ifdef DEBUG_MODE |
||
| 1043 | UART2PrintString( "\r\n***** USB OTG A Event - SRP - VBUS > VA_SESS_VLD *****\r\n" ); |
||
| 1044 | #endif |
||
| 1045 | } |
||
| 1046 | break; |
||
| 1047 | |||
| 1048 | case OTG_EVENT_SRP_VBUS_LOW: //SRP VBUS < VA_SESS_VLD Event (Caused by SESVDIF) |
||
| 1049 | if (SRPActive) |
||
| 1050 | { |
||
| 1051 | #ifdef DEBUG_MODE |
||
| 1052 | UART2PrintString( "\r\n***** USB OTG A Event - SRP - VBUS < VA_SESS_VLD *****\r\n" ); |
||
| 1053 | #endif |
||
| 1054 | |||
| 1055 | //Disable Session Valid Change Interrupt |
||
| 1056 | U1OTGIEbits.SESVDIE = 0; |
||
| 1057 | |||
| 1058 | //Deactivate SRP |
||
| 1059 | USBOTGDeactivateSrp(); |
||
| 1060 | |||
| 1061 | //Configure Timer For > TA_WAIT_BCON Check |
||
| 1062 | SRPTimeOut = DELAY_TA_WAIT_BCON; |
||
| 1063 | SRPTimeOutFlag = 1; |
||
| 1064 | |||
| 1065 | //Enable 1ms Timer Interrupt |
||
| 1066 | U1OTGIR = 0x40; |
||
| 1067 | U1OTGIEbits.T1MSECIE = 1; |
||
| 1068 | |||
| 1069 | //Set SRP Ready |
||
| 1070 | SRPReady = 1; |
||
| 1071 | |||
| 1072 | //Start Session |
||
| 1073 | //If The B Side Connects within DELAY_TA_WAIT_BCON |
||
| 1074 | //this will cause a OTG_EVENT_SRP_CONNECT Event |
||
| 1075 | USBOTGSession(START_SESSION); |
||
| 1076 | } |
||
| 1077 | break; |
||
| 1078 | |||
| 1079 | case OTG_EVENT_SRP_CONNECT: //SRP Connect Condition (Caused by ATTACHIF after Session Is Started) |
||
| 1080 | if (SRPReady) |
||
| 1081 | { |
||
| 1082 | //Clear SRP Ready |
||
| 1083 | SRPReady = 0; |
||
| 1084 | |||
| 1085 | //Disable Time Out |
||
| 1086 | SRPTimeOutFlag = 0; |
||
| 1087 | } |
||
| 1088 | break; |
||
| 1089 | |||
| 1090 | case OTG_EVENT_DISCONNECT: //Host Disconnect Condition (Caused by DETACHIF) |
||
| 1091 | //If Currentrole is Host And HNP Is Active Then |
||
| 1092 | if (CurrentRole == ROLE_HOST && HNPActive) |
||
| 1093 | { |
||
| 1094 | |||
| 1095 | //Initialize Device Stack |
||
| 1096 | //Will Cause an OTG_EVENT_CONNECT Event on other side When D+ Pullup Is Enabled |
||
| 1097 | USBOTGInitializeDeviceStack(); |
||
| 1098 | |||
| 1099 | #ifdef DEBUG_MODE |
||
| 1100 | if (DefaultRole == ROLE_HOST) |
||
| 1101 | { |
||
| 1102 | UART2PrintString( "\r\n***** USB OTG A Event - B Device Disconnect *****\r\n" ); |
||
| 1103 | UART2PrintString( "\r\n***** USB OTG A Event - Role Switch - Host -> Device *****\r\n" ); |
||
| 1104 | } |
||
| 1105 | else if (DefaultRole == ROLE_DEVICE) |
||
| 1106 | { |
||
| 1107 | UART2PrintString( "\r\n***** USB OTG B Event - A Device Disconnect *****\r\n" ); |
||
| 1108 | UART2PrintString( "\r\n***** USB OTG B Event - Role Switch - Host -> Device *****\r\n" ); |
||
| 1109 | } |
||
| 1110 | #endif |
||
| 1111 | } |
||
| 1112 | break; |
||
| 1113 | |||
| 1114 | case OTG_EVENT_CONNECT: //Device Connect Condition (Caused by ATTACHIF) |
||
| 1115 | //If Currentrole is Device And HNP Is Active Then |
||
| 1116 | if (CurrentRole == ROLE_DEVICE && HNPActive) |
||
| 1117 | { |
||
| 1118 | //Initialize Host Stack |
||
| 1119 | USBOTGInitializeHostStack(); |
||
| 1120 | |||
| 1121 | #ifdef DEBUG_MODE |
||
| 1122 | if (DefaultRole == ROLE_HOST) |
||
| 1123 | { |
||
| 1124 | UART2PrintString( "\r\n***** USB OTG A Event - Role Switch - Device -> Host *****\r\n" ); |
||
| 1125 | UART2PrintString( "\r\n***** USB OTG A Event - B Device Connect *****\r\n" ); |
||
| 1126 | } |
||
| 1127 | else if (DefaultRole == ROLE_DEVICE) |
||
| 1128 | { |
||
| 1129 | UART2PrintString( "\r\n***** USB OTG B Event - Role Switch - Device -> Host *****\r\n" ); |
||
| 1130 | UART2PrintString( "\r\n***** USB OTG B Event - A Device Connect *****\r\n" ); |
||
| 1131 | } |
||
| 1132 | #endif |
||
| 1133 | } |
||
| 1134 | break; |
||
| 1135 | |||
| 1136 | case OTG_EVENT_HNP_ABORT: //HNP Abort Condition, Caused by Unsupported Device (CASE_HOLDING) |
||
| 1137 | //If HNP Is Enabled Then |
||
| 1138 | if (HNPEnable) |
||
| 1139 | { |
||
| 1140 | //If A side Host Then |
||
| 1141 | if (DefaultRole == ROLE_HOST) |
||
| 1142 | { |
||
| 1143 | //Switch To Device |
||
| 1144 | USBOTGSelectRole(ROLE_DEVICE); |
||
| 1145 | |||
| 1146 | #ifdef DEBUG_MODE |
||
| 1147 | //Indicate Error Message |
||
| 1148 | UART2PrintString( "\r\n***** USB OTG A Error - HNP - Unsupported Device*****\r\n" ); |
||
| 1149 | #endif |
||
| 1150 | } |
||
| 1151 | |||
| 1152 | //If B side Host Then |
||
| 1153 | else if (DefaultRole == ROLE_DEVICE) |
||
| 1154 | { |
||
| 1155 | //Initialize Device Stack |
||
| 1156 | USBOTGInitializeDeviceStack(); |
||
| 1157 | |||
| 1158 | #ifdef DEBUG_MODE |
||
| 1159 | //Indicate Error Message |
||
| 1160 | UART2PrintString( "\r\n***** USB OTG B Error - HNP Abort - Unsupported Device*****\r\n" ); |
||
| 1161 | #endif |
||
| 1162 | } |
||
| 1163 | } |
||
| 1164 | break; |
||
| 1165 | |||
| 1166 | case OTG_EVENT_HNP_FAILED: //HNP Fail Condition, Caused by device not responding When HNP Is Enabled And A Suspend is Issued or Received(T1MSECIF) |
||
| 1167 | if (DefaultRole == ROLE_HOST) |
||
| 1168 | { |
||
| 1169 | //Initialize Host Stack |
||
| 1170 | USBOTGInitializeHostStack(); |
||
| 1171 | |||
| 1172 | //End Session |
||
| 1173 | USBOTGSession(END_SESSION); |
||
| 1174 | |||
| 1175 | //Indicate Error |
||
| 1176 | UART2PrintString( "\r\n***** USB OTG A Error - HNP Failed - Device Not Responding - Session Ended *****\r\n" ); |
||
| 1177 | } |
||
| 1178 | else if (DefaultRole == ROLE_DEVICE) |
||
| 1179 | { |
||
| 1180 | //Initialize Device Stack |
||
| 1181 | USBOTGInitializeDeviceStack(); |
||
| 1182 | |||
| 1183 | //Indicate Error Message |
||
| 1184 | UART2PrintString( "\r\n***** USB OTG B Error - HNP Failed - Device Not Responding *****\r\n" ); |
||
| 1185 | } |
||
| 1186 | break; |
||
| 1187 | |||
| 1188 | case OTG_EVENT_SRP_FAILED: //SRP Fail Condition, Caused by A or B side not Connecting on a SRP Transition (T1MSECIF) |
||
| 1189 | if (DefaultRole == ROLE_HOST) |
||
| 1190 | { |
||
| 1191 | //Clear SRP Ready |
||
| 1192 | SRPReady = 0; |
||
| 1193 | |||
| 1194 | //End Session |
||
| 1195 | USBOTGSession(END_SESSION); |
||
| 1196 | |||
| 1197 | //Indicate Error |
||
| 1198 | UART2PrintString( "\r\n***** USB OTG A Error - SRP Failed - Device Not Responding - Session Ended *****\r\n" ); |
||
| 1199 | } |
||
| 1200 | else if (DefaultRole == ROLE_DEVICE) |
||
| 1201 | { |
||
| 1202 | //Clear SRP Ready |
||
| 1203 | SRPReady = 0; |
||
| 1204 | |||
| 1205 | //SRP Failed |
||
| 1206 | UART2PrintString( "\r\n***** USB OTG B Error - SRP Failed - Device Not Responding *****\r\n" ); |
||
| 1207 | } |
||
| 1208 | break; |
||
| 1209 | |||
| 1210 | case OTG_EVENT_RESUME_SIGNALING: |
||
| 1211 | #ifdef DEBUG_MODE |
||
| 1212 | UART2PrintString("\r\n***** USB OTG A Event - Resume Signaling Detected *****\r\n"); |
||
| 1213 | #endif |
||
| 1214 | |||
| 1215 | //Disable Timers |
||
| 1216 | U1OTGIEbits.T1MSECIE = 0; |
||
| 1217 | HNPTimeOutFlag = 0; |
||
| 1218 | SRPTimeOutFlag = 0; |
||
| 1219 | SRPReady = 0; |
||
| 1220 | |||
| 1221 | //Enable Host Resume Signaling |
||
| 1222 | U1CONbits.RESUME = 1; |
||
| 1223 | |||
| 1224 | //Hold Resume for >= 20ms |
||
| 1225 | USBOTGDelayMs(40); |
||
| 1226 | |||
| 1227 | //Disable Host Resume Signaling |
||
| 1228 | U1CONbits.RESUME = 0; |
||
| 1229 | |||
| 1230 | //Send SOF |
||
| 1231 | U1CONbits.SOFEN = 1; |
||
| 1232 | |||
| 1233 | //Resume Recovery |
||
| 1234 | USBOTGDelayMs(10); |
||
| 1235 | |||
| 1236 | //Setup Normal Run State |
||
| 1237 | //usbOverrideHostState = 0x400; |
||
| 1238 | //Issue Reset |
||
| 1239 | usbOverrideHostState = 0x0110; |
||
| 1240 | |||
| 1241 | //Deactivate Hnp |
||
| 1242 | USBOTGDeactivateHnp(); |
||
| 1243 | |||
| 1244 | //Disable Resume Interrupt |
||
| 1245 | U1IEbits.RESUMEIE = 0; |
||
| 1246 | break; |
||
| 1247 | } |
||
| 1248 | } |
||
| 1249 | |||
| 1250 | |||
| 1251 | // ***************************************************************************** |
||
| 1252 | // ***************************************************************************** |
||
| 1253 | // Section: Interrupt Handlers |
||
| 1254 | // ***************************************************************************** |
||
| 1255 | // ***************************************************************************** |
||
| 1256 | |||
| 1257 | //DOM-IGNORE-BEGIN |
||
| 1258 | /**************************************************************************** |
||
| 1259 | Function: |
||
| 1260 | void _CNInterrupt(void) |
||
| 1261 | |||
| 1262 | Description: |
||
| 1263 | This is the interrupt service routine for the Change Notice interrupt. The |
||
| 1264 | following cases are serviced: |
||
| 1265 | * Overcurrent Detection (PGOOD Goes Low After VBUS Is Enabled) |
||
| 1266 | |||
| 1267 | Precondition: |
||
| 1268 | MCP1253 Is Enabled and Activated => VBUS = 5V |
||
| 1269 | |||
| 1270 | Parameters: |
||
| 1271 | None - None |
||
| 1272 | |||
| 1273 | Returns: |
||
| 1274 | None |
||
| 1275 | |||
| 1276 | Remarks: |
||
| 1277 | None |
||
| 1278 | ***************************************************************************/ |
||
| 1279 | //DOM-IGNORE-END |
||
| 1280 | #ifdef OVERCURRENT_DETECTION |
||
| 1281 | #if defined(__C30__) |
||
| 1282 | void __attribute__((__interrupt__, auto_psv)) _CNInterrupt(void) |
||
| 1283 | #elif defined(__PIC32MX__) |
||
| 1284 | #pragma interrupt _CNInterrupt ipl5 vector 26 |
||
| 1285 | void _CNInterrupt( void ) |
||
| 1286 | #endif |
||
| 1287 | { |
||
| 1288 | BYTE temp; |
||
| 1289 | |||
| 1290 | #ifdef DEBUG_MODE |
||
| 1291 | UART2PrintString( "\r\n***** PGOOD Change Notice Detected *****\r\n" ); |
||
| 1292 | #endif |
||
| 1293 | |||
| 1294 | //Debounce Interrupt To Ensure Wasn't Caused By Inrush |
||
| 1295 | USBOTGDelayMs(10); |
||
| 1296 | |||
| 1297 | //If PGOOD Is Still Low |
||
| 1298 | if (PGOOD == 0) |
||
| 1299 | { |
||
| 1300 | //Disable VBUS |
||
| 1301 | VBUS_Off; |
||
| 1302 | |||
| 1303 | //Indicate Error |
||
| 1304 | UART2PrintString( "\r\n***** USB OTG A Error - Overcurrent Condition Detected - Session Ended *****\r\n" ); |
||
| 1305 | |||
| 1306 | #if defined(__C30__) |
||
| 1307 | //Disable Change Notification |
||
| 1308 | IEC1bits.CNIE = 0; |
||
| 1309 | CNEN6bits.CN80IE = 0; |
||
| 1310 | #elif defined(__PIC32MX__) |
||
| 1311 | // Disable Change Notification |
||
| 1312 | IEC1CLR = 0x00000001; |
||
| 1313 | CNENCLR= 0x00000004; |
||
| 1314 | PORTB = temp; |
||
| 1315 | #endif |
||
| 1316 | |||
| 1317 | //Initialize Host Stack |
||
| 1318 | USBOTGInitializeHostStack(); |
||
| 1319 | } |
||
| 1320 | |||
| 1321 | #if defined(__C30__) |
||
| 1322 | //Clear Interrupt Flag |
||
| 1323 | IFS1bits.CNIF = 0; |
||
| 1324 | #elif defined(__PIC32MX__) |
||
| 1325 | PORTB = temp; |
||
| 1326 | IFS1CLR = 0x00000001; // Clear the interrupt flag status bit |
||
| 1327 | #endif |
||
| 1328 | } |
||
| 1329 | #endif |
||
| 1330 | |||
| 1331 | |||
| 1332 | |||
| 1333 | //DOM-IGNORE-BEGIN |
||
| 1334 | /**************************************************************************** |
||
| 1335 | Function: |
||
| 1336 | BOOL USBOTGRoleSwitch() |
||
| 1337 | |||
| 1338 | Description: |
||
| 1339 | This function returns whether a role switch occurred or not. This is used by the main application function |
||
| 1340 | to determine when to reinitialize the system (InitializeSystem()) |
||
| 1341 | |||
| 1342 | Precondition: |
||
| 1343 | None |
||
| 1344 | |||
| 1345 | Parameters: |
||
| 1346 | None |
||
| 1347 | |||
| 1348 | Return Values: |
||
| 1349 | BOOL - TRUE or FALSE |
||
| 1350 | |||
| 1351 | Remarks: |
||
| 1352 | None |
||
| 1353 | ***************************************************************************/ |
||
| 1354 | //DOM-IGNORE-END |
||
| 1355 | BOOL USBOTGRoleSwitch() |
||
| 1356 | { |
||
| 1357 | return RoleSwitch; |
||
| 1358 | } |
||
| 1359 | |||
| 1360 | |||
| 1361 | //DOM-IGNORE-BEGIN |
||
| 1362 | /**************************************************************************** |
||
| 1363 | Function: |
||
| 1364 | void USBOTGClearRoleSwitch() |
||
| 1365 | |||
| 1366 | Description: |
||
| 1367 | This function clears the RoleSwitch variable. After the main function detects the RoleSwitch |
||
| 1368 | and re-initializes the system, this function should be called to clear the RoleSwitch flag |
||
| 1369 | |||
| 1370 | Precondition: |
||
| 1371 | None |
||
| 1372 | |||
| 1373 | Parameters: |
||
| 1374 | None |
||
| 1375 | |||
| 1376 | Return Values: |
||
| 1377 | None |
||
| 1378 | |||
| 1379 | Remarks: |
||
| 1380 | None |
||
| 1381 | ***************************************************************************/ |
||
| 1382 | //DOM-IGNORE-END |
||
| 1383 | void USBOTGClearRoleSwitch() |
||
| 1384 | { |
||
| 1385 | RoleSwitch = FALSE; |
||
| 1386 | } |
||
| 1387 | |||
| 1388 | //DOM-IGNORE-BEGIN |
||
| 1389 | /**************************************************************************** |
||
| 1390 | Function: |
||
| 1391 | BYTE USBOTGCurrentRoleIs() |
||
| 1392 | |||
| 1393 | Description: |
||
| 1394 | This function returns whether the current role is ROLE_HOST or ROLE_DEVICE |
||
| 1395 | |||
| 1396 | Precondition: |
||
| 1397 | None |
||
| 1398 | |||
| 1399 | Parameters: |
||
| 1400 | None |
||
| 1401 | |||
| 1402 | Return Values: |
||
| 1403 | BYTE - ROLE_HOST or ROLE_DEVICE |
||
| 1404 | |||
| 1405 | Remarks: |
||
| 1406 | None |
||
| 1407 | ***************************************************************************/ |
||
| 1408 | //DOM-IGNORE-END |
||
| 1409 | BYTE USBOTGCurrentRoleIs() |
||
| 1410 | { |
||
| 1411 | return CurrentRole; |
||
| 1412 | } |
||
| 1413 | |||
| 1414 | |||
| 1415 | //DOM-IGNORE-BEGIN |
||
| 1416 | /**************************************************************************** |
||
| 1417 | Function: |
||
| 1418 | BYTE USBOTGDefaultRoleIs() |
||
| 1419 | |||
| 1420 | Description: |
||
| 1421 | This function returns whether the default role is ROLE_HOST or ROLE_DEVICE |
||
| 1422 | |||
| 1423 | Precondition: |
||
| 1424 | None |
||
| 1425 | |||
| 1426 | Parameters: |
||
| 1427 | None |
||
| 1428 | |||
| 1429 | Return Values: |
||
| 1430 | BYTE - ROLE_HOST or ROLE_DEVICE |
||
| 1431 | |||
| 1432 | Remarks: |
||
| 1433 | None |
||
| 1434 | ***************************************************************************/ |
||
| 1435 | //DOM-IGNORE-END |
||
| 1436 | BYTE USBOTGDefaultRoleIs() |
||
| 1437 | { |
||
| 1438 | return DefaultRole; |
||
| 1439 | } |
||
| 1440 | |||
| 1441 | |||
| 1442 | //DOM-IGNORE-BEGIN |
||
| 1443 | /**************************************************************************** |
||
| 1444 | Function: |
||
| 1445 | void USBOTGEnableHnp() |
||
| 1446 | |||
| 1447 | Description: |
||
| 1448 | This function enables HNP |
||
| 1449 | |||
| 1450 | Precondition: |
||
| 1451 | None |
||
| 1452 | |||
| 1453 | Parameters: |
||
| 1454 | None |
||
| 1455 | |||
| 1456 | Return Values: |
||
| 1457 | None |
||
| 1458 | |||
| 1459 | Remarks: |
||
| 1460 | None |
||
| 1461 | ***************************************************************************/ |
||
| 1462 | //DOM-IGNORE-END |
||
| 1463 | void USBOTGEnableHnp() |
||
| 1464 | { |
||
| 1465 | HNPEnable = 1; |
||
| 1466 | } |
||
| 1467 | |||
| 1468 | |||
| 1469 | //DOM-IGNORE-BEGIN |
||
| 1470 | /**************************************************************************** |
||
| 1471 | Function: |
||
| 1472 | void USBOTGDisableHnp() |
||
| 1473 | |||
| 1474 | Description: |
||
| 1475 | This function disables HNP |
||
| 1476 | |||
| 1477 | Precondition: |
||
| 1478 | None |
||
| 1479 | |||
| 1480 | Parameters: |
||
| 1481 | None |
||
| 1482 | |||
| 1483 | Return Values: |
||
| 1484 | None |
||
| 1485 | |||
| 1486 | Remarks: |
||
| 1487 | None |
||
| 1488 | ***************************************************************************/ |
||
| 1489 | //DOM-IGNORE-END |
||
| 1490 | void USBOTGDisableHnp() |
||
| 1491 | { |
||
| 1492 | HNPEnable = 0; |
||
| 1493 | } |
||
| 1494 | |||
| 1495 | |||
| 1496 | //DOM-IGNORE-BEGIN |
||
| 1497 | /**************************************************************************** |
||
| 1498 | Function: |
||
| 1499 | void void USBOTGEnableAltHnp() |
||
| 1500 | |||
| 1501 | Description: |
||
| 1502 | This function enables Alt HNP |
||
| 1503 | |||
| 1504 | Precondition: |
||
| 1505 | None |
||
| 1506 | |||
| 1507 | Parameters: |
||
| 1508 | None |
||
| 1509 | |||
| 1510 | Return Values: |
||
| 1511 | None |
||
| 1512 | |||
| 1513 | Remarks: |
||
| 1514 | None |
||
| 1515 | ***************************************************************************/ |
||
| 1516 | //DOM-IGNORE-END |
||
| 1517 | void USBOTGEnableAltHnp() |
||
| 1518 | { |
||
| 1519 | HNPAltSupport = 1; |
||
| 1520 | } |
||
| 1521 | |||
| 1522 | |||
| 1523 | //DOM-IGNORE-BEGIN |
||
| 1524 | /**************************************************************************** |
||
| 1525 | Function: |
||
| 1526 | void USBOTGDisableAltHnp() |
||
| 1527 | |||
| 1528 | Description: |
||
| 1529 | This function disables Alt HNP |
||
| 1530 | |||
| 1531 | Precondition: |
||
| 1532 | None |
||
| 1533 | |||
| 1534 | Parameters: |
||
| 1535 | None |
||
| 1536 | |||
| 1537 | Return Values: |
||
| 1538 | None |
||
| 1539 | |||
| 1540 | Remarks: |
||
| 1541 | None |
||
| 1542 | ***************************************************************************/ |
||
| 1543 | //DOM-IGNORE-END |
||
| 1544 | void USBOTGDisableAltHnp() |
||
| 1545 | { |
||
| 1546 | HNPAltSupport = 0; |
||
| 1547 | } |
||
| 1548 | |||
| 1549 | |||
| 1550 | //DOM-IGNORE-BEGIN |
||
| 1551 | /**************************************************************************** |
||
| 1552 | Function: |
||
| 1553 | void USBOTGEnableSupportHnp() |
||
| 1554 | |||
| 1555 | Description: |
||
| 1556 | This function enables HNP Support |
||
| 1557 | |||
| 1558 | Precondition: |
||
| 1559 | None |
||
| 1560 | |||
| 1561 | Parameters: |
||
| 1562 | None |
||
| 1563 | |||
| 1564 | Return Values: |
||
| 1565 | None |
||
| 1566 | |||
| 1567 | Remarks: |
||
| 1568 | None |
||
| 1569 | ***************************************************************************/ |
||
| 1570 | //DOM-IGNORE-END |
||
| 1571 | void USBOTGEnableSupportHnp() |
||
| 1572 | { |
||
| 1573 | HNPSupport = 1; |
||
| 1574 | } |
||
| 1575 | |||
| 1576 | |||
| 1577 | //DOM-IGNORE-BEGIN |
||
| 1578 | /**************************************************************************** |
||
| 1579 | Function: |
||
| 1580 | void USBOTGDisableSupportHnp() |
||
| 1581 | |||
| 1582 | Description: |
||
| 1583 | This function disables HNP Support |
||
| 1584 | |||
| 1585 | Precondition: |
||
| 1586 | None |
||
| 1587 | |||
| 1588 | Parameters: |
||
| 1589 | None |
||
| 1590 | |||
| 1591 | Return Values: |
||
| 1592 | None |
||
| 1593 | |||
| 1594 | Remarks: |
||
| 1595 | None |
||
| 1596 | ***************************************************************************/ |
||
| 1597 | //DOM-IGNORE-END |
||
| 1598 | void USBOTGDisableSupportHnp() |
||
| 1599 | { |
||
| 1600 | HNPSupport = 0; |
||
| 1601 | } |
||
| 1602 | |||
| 1603 | |||
| 1604 | //DOM-IGNORE-BEGIN |
||
| 1605 | /**************************************************************************** |
||
| 1606 | Function: |
||
| 1607 | BOOL USBOTGHnpIsEnabled() |
||
| 1608 | |||
| 1609 | Description: |
||
| 1610 | This function returns TRUE if HNP is enabled, FALSE otherwise |
||
| 1611 | |||
| 1612 | Precondition: |
||
| 1613 | None |
||
| 1614 | |||
| 1615 | Parameters: |
||
| 1616 | BOOL - TRUE or FALSE |
||
| 1617 | |||
| 1618 | Return Values: |
||
| 1619 | None |
||
| 1620 | |||
| 1621 | Remarks: |
||
| 1622 | None |
||
| 1623 | ***************************************************************************/ |
||
| 1624 | //DOM-IGNORE-END |
||
| 1625 | BOOL USBOTGHnpIsEnabled() |
||
| 1626 | { |
||
| 1627 | return HNPEnable; |
||
| 1628 | |||
| 1629 | } |
||
| 1630 | |||
| 1631 | |||
| 1632 | //DOM-IGNORE-BEGIN |
||
| 1633 | /**************************************************************************** |
||
| 1634 | Function: |
||
| 1635 | BOOL USBOTGHnpIsActive() |
||
| 1636 | |||
| 1637 | Description: |
||
| 1638 | This function returns TRUE if HNP is active, FALSE otherwise |
||
| 1639 | |||
| 1640 | Precondition: |
||
| 1641 | None |
||
| 1642 | |||
| 1643 | Parameters: |
||
| 1644 | BOOL - TRUE or FALSE |
||
| 1645 | |||
| 1646 | Return Values: |
||
| 1647 | None |
||
| 1648 | |||
| 1649 | Remarks: |
||
| 1650 | None |
||
| 1651 | ***************************************************************************/ |
||
| 1652 | //DOM-IGNORE-END |
||
| 1653 | BOOL USBOTGHnpIsActive() |
||
| 1654 | { |
||
| 1655 | return HNPActive; |
||
| 1656 | } |
||
| 1657 | |||
| 1658 | |||
| 1659 | //DOM-IGNORE-BEGIN |
||
| 1660 | /**************************************************************************** |
||
| 1661 | Function: |
||
| 1662 | BOOL USBOTGSrpIsActive() |
||
| 1663 | |||
| 1664 | Description: |
||
| 1665 | This function returns TRUE if SRP is active, FALSE otherwise |
||
| 1666 | |||
| 1667 | Precondition: |
||
| 1668 | None |
||
| 1669 | |||
| 1670 | Parameters: |
||
| 1671 | BOOL - TRUE or FALSE |
||
| 1672 | |||
| 1673 | Return Values: |
||
| 1674 | None |
||
| 1675 | |||
| 1676 | Remarks: |
||
| 1677 | None |
||
| 1678 | ***************************************************************************/ |
||
| 1679 | //DOM-IGNORE-END |
||
| 1680 | BOOL USBOTGSrpIsActive() |
||
| 1681 | { |
||
| 1682 | return SRPActive; |
||
| 1683 | } |
||
| 1684 | |||
| 1685 | |||
| 1686 | //DOM-IGNORE-BEGIN |
||
| 1687 | /**************************************************************************** |
||
| 1688 | Function: |
||
| 1689 | void USBOTGActivateSrp() |
||
| 1690 | |||
| 1691 | Description: |
||
| 1692 | This function activates SRP |
||
| 1693 | |||
| 1694 | Precondition: |
||
| 1695 | None |
||
| 1696 | |||
| 1697 | Parameters: |
||
| 1698 | None |
||
| 1699 | |||
| 1700 | Return Values: |
||
| 1701 | None |
||
| 1702 | |||
| 1703 | Remarks: |
||
| 1704 | None |
||
| 1705 | ***************************************************************************/ |
||
| 1706 | //DOM-IGNORE-END |
||
| 1707 | void USBOTGActivateSrp() |
||
| 1708 | { |
||
| 1709 | SRPActive = 1; |
||
| 1710 | } |
||
| 1711 | |||
| 1712 | |||
| 1713 | //DOM-IGNORE-BEGIN |
||
| 1714 | /**************************************************************************** |
||
| 1715 | Function: |
||
| 1716 | void USBOTGDeactivateSrp() |
||
| 1717 | |||
| 1718 | Description: |
||
| 1719 | This function Deactivates SRP |
||
| 1720 | |||
| 1721 | Precondition: |
||
| 1722 | None |
||
| 1723 | |||
| 1724 | Parameters: |
||
| 1725 | None |
||
| 1726 | |||
| 1727 | Return Values: |
||
| 1728 | None |
||
| 1729 | |||
| 1730 | Remarks: |
||
| 1731 | None |
||
| 1732 | ***************************************************************************/ |
||
| 1733 | //DOM-IGNORE-END |
||
| 1734 | void USBOTGDeactivateSrp() |
||
| 1735 | { |
||
| 1736 | SRPActive = 0; |
||
| 1737 | } |
||
| 1738 | |||
| 1739 | |||
| 1740 | //DOM-IGNORE-BEGIN |
||
| 1741 | /**************************************************************************** |
||
| 1742 | Function: |
||
| 1743 | void USBOTGActivateHnp() |
||
| 1744 | |||
| 1745 | Description: |
||
| 1746 | This function activates HNP |
||
| 1747 | |||
| 1748 | Precondition: |
||
| 1749 | None |
||
| 1750 | |||
| 1751 | Parameters: |
||
| 1752 | None |
||
| 1753 | |||
| 1754 | Return Values: |
||
| 1755 | None |
||
| 1756 | |||
| 1757 | Remarks: |
||
| 1758 | None |
||
| 1759 | ***************************************************************************/ |
||
| 1760 | //DOM-IGNORE-END |
||
| 1761 | void USBOTGActivateHnp() |
||
| 1762 | { |
||
| 1763 | HNPActive = 1; |
||
| 1764 | } |
||
| 1765 | |||
| 1766 | |||
| 1767 | //DOM-IGNORE-BEGIN |
||
| 1768 | /**************************************************************************** |
||
| 1769 | Function: |
||
| 1770 | void USBOTGDeactivateHnp() |
||
| 1771 | |||
| 1772 | Description: |
||
| 1773 | This function deactivates HNP |
||
| 1774 | |||
| 1775 | Precondition: |
||
| 1776 | None |
||
| 1777 | |||
| 1778 | Parameters: |
||
| 1779 | None |
||
| 1780 | |||
| 1781 | Return Values: |
||
| 1782 | None |
||
| 1783 | |||
| 1784 | Remarks: |
||
| 1785 | None |
||
| 1786 | ***************************************************************************/ |
||
| 1787 | //DOM-IGNORE-END |
||
| 1788 | void USBOTGDeactivateHnp() |
||
| 1789 | { |
||
| 1790 | HNPActive = 0; |
||
| 1791 | } |
||
| 1792 | |||
| 1793 | |||
| 1794 | //DOM-IGNORE-BEGIN |
||
| 1795 | /**************************************************************************** |
||
| 1796 | Function: |
||
| 1797 | BOOL USBOTGGetHNPTimeOutFlag() |
||
| 1798 | |||
| 1799 | Description: |
||
| 1800 | This function returns the HNPTimeOutFlag. This flag is used for timing the TB_ASE0_BRST USB OTG |
||
| 1801 | Timing parameter. This flag is checked in the 1ms Timer interrupt handler. |
||
| 1802 | |||
| 1803 | Precondition: |
||
| 1804 | None |
||
| 1805 | |||
| 1806 | Parameters: |
||
| 1807 | None |
||
| 1808 | |||
| 1809 | Return Values: |
||
| 1810 | BOOL - TRUE or FALSE |
||
| 1811 | |||
| 1812 | Remarks: |
||
| 1813 | None |
||
| 1814 | ***************************************************************************/ |
||
| 1815 | //DOM-IGNORE-END |
||
| 1816 | BOOL USBOTGGetHNPTimeOutFlag() |
||
| 1817 | { |
||
| 1818 | return HNPTimeOutFlag; |
||
| 1819 | } |
||
| 1820 | |||
| 1821 | |||
| 1822 | //DOM-IGNORE-BEGIN |
||
| 1823 | /**************************************************************************** |
||
| 1824 | Function: |
||
| 1825 | BOOL USBOTGIsHNPTimeOutExpired() |
||
| 1826 | |||
| 1827 | Description: |
||
| 1828 | This function decrements HNPTimeOut and checks to see if HNPTimeOut has expired. This function |
||
| 1829 | returns TRUE if HNPTimeOut has expired, FALSE otherwise. |
||
| 1830 | |||
| 1831 | Precondition: |
||
| 1832 | None |
||
| 1833 | |||
| 1834 | Parameters: |
||
| 1835 | None |
||
| 1836 | |||
| 1837 | Return Values: |
||
| 1838 | BOOL - TRUE - Time Expired |
||
| 1839 | FALSE - Time Not Expired |
||
| 1840 | |||
| 1841 | Remarks: |
||
| 1842 | HNPTime should be > 0 |
||
| 1843 | ***************************************************************************/ |
||
| 1844 | //DOM-IGNORE-END |
||
| 1845 | BOOL USBOTGIsHNPTimeOutExpired() |
||
| 1846 | { |
||
| 1847 | //Decrement Count |
||
| 1848 | HNPTimeOut--; |
||
| 1849 | |||
| 1850 | if (HNPTimeOut == 0) |
||
| 1851 | { |
||
| 1852 | //Clear Timer Flag |
||
| 1853 | HNPTimeOutFlag = 0; |
||
| 1854 | |||
| 1855 | // Turn off the timer interrupt. |
||
| 1856 | U1OTGIEbits.T1MSECIE = 0; |
||
| 1857 | |||
| 1858 | //Timer Expired |
||
| 1859 | return TRUE; |
||
| 1860 | } |
||
| 1861 | else |
||
| 1862 | { |
||
| 1863 | //Timer Not Expired |
||
| 1864 | return FALSE; |
||
| 1865 | } |
||
| 1866 | } |
||
| 1867 | |||
| 1868 | |||
| 1869 | //DOM-IGNORE-BEGIN |
||
| 1870 | /**************************************************************************** |
||
| 1871 | Function: |
||
| 1872 | BOOL USBOTGIsSRPTimeOutExpired() |
||
| 1873 | |||
| 1874 | Description: |
||
| 1875 | This function decrements SRPTimeOut and checks to see if SRPTimeOut has expired. This function |
||
| 1876 | returns TRUE if SRPTimeOut has expired, FALSE otherwise. |
||
| 1877 | |||
| 1878 | Precondition: |
||
| 1879 | None |
||
| 1880 | |||
| 1881 | Parameters: |
||
| 1882 | None |
||
| 1883 | |||
| 1884 | Return Values: |
||
| 1885 | BOOL - TRUE - Time Expired |
||
| 1886 | FALSE - Time Not Expired |
||
| 1887 | |||
| 1888 | Remarks: |
||
| 1889 | HNPTimeOut value should be > 0 |
||
| 1890 | ***************************************************************************/ |
||
| 1891 | //DOM-IGNORE-END |
||
| 1892 | BOOL USBOTGIsSRPTimeOutExpired() |
||
| 1893 | { |
||
| 1894 | //Decrement Count |
||
| 1895 | SRPTimeOut--; |
||
| 1896 | |||
| 1897 | if (SRPTimeOut == 0) |
||
| 1898 | { |
||
| 1899 | //Clear Timer Flag |
||
| 1900 | SRPTimeOutFlag = 0; |
||
| 1901 | |||
| 1902 | // Turn off the timer interrupt. |
||
| 1903 | U1OTGIEbits.T1MSECIE = 0; |
||
| 1904 | |||
| 1905 | //Timer Expired |
||
| 1906 | return TRUE; |
||
| 1907 | } |
||
| 1908 | else |
||
| 1909 | { |
||
| 1910 | //Timer Not Expired |
||
| 1911 | return FALSE; |
||
| 1912 | } |
||
| 1913 | } |
||
| 1914 | |||
| 1915 | |||
| 1916 | //DOM-IGNORE-BEGIN |
||
| 1917 | /**************************************************************************** |
||
| 1918 | Function: |
||
| 1919 | BOOL USBOTGGetSRPTimeOutFlag() |
||
| 1920 | |||
| 1921 | Description: |
||
| 1922 | This function returns the SRPTimeOutFlag. This flag is used for timing the TA_WAIT_BCON USB OTG |
||
| 1923 | Timing parameter. This flag is checked in the 1ms Timer interrupt handler. |
||
| 1924 | |||
| 1925 | Precondition: |
||
| 1926 | None |
||
| 1927 | |||
| 1928 | Parameters: |
||
| 1929 | None |
||
| 1930 | |||
| 1931 | Return Values: |
||
| 1932 | BOOL - TRUE or FALSE |
||
| 1933 | |||
| 1934 | Remarks: |
||
| 1935 | None |
||
| 1936 | ***************************************************************************/ |
||
| 1937 | //DOM-IGNORE-END |
||
| 1938 | BOOL USBOTGGetSRPTimeOutFlag() |
||
| 1939 | { |
||
| 1940 | return SRPTimeOutFlag; |
||
| 1941 | } |
||
| 1942 | |||
| 1943 | |||
| 1944 | //DOM-IGNORE-BEGIN |
||
| 1945 | /**************************************************************************** |
||
| 1946 | Function: |
||
| 1947 | BOOL USBOTGSRPIsReady() |
||
| 1948 | |||
| 1949 | Description: |
||
| 1950 | This function returns the value of SRPReady. This flag is set after the B-device finishes SRP |
||
| 1951 | and the A-device is ready for the B-device to connect |
||
| 1952 | |||
| 1953 | Precondition: |
||
| 1954 | None |
||
| 1955 | |||
| 1956 | Parameters: |
||
| 1957 | None |
||
| 1958 | |||
| 1959 | Return Values: |
||
| 1960 | BOOL - TRUE or FALSE |
||
| 1961 | |||
| 1962 | Remarks: |
||
| 1963 | None |
||
| 1964 | ***************************************************************************/ |
||
| 1965 | //DOM-IGNORE-END |
||
| 1966 | BOOL USBOTGSRPIsReady() |
||
| 1967 | { |
||
| 1968 | return SRPReady; |
||
| 1969 | } |
||
| 1970 | |||
| 1971 | |||
| 1972 | //DOM-IGNORE-BEGIN |
||
| 1973 | /**************************************************************************** |
||
| 1974 | Function: |
||
| 1975 | void USBOTGClearSRPTimeOutFlag() |
||
| 1976 | |||
| 1977 | Description: |
||
| 1978 | This function clears the SRPTimeOutFlag. This flag is checked in the 1ms |
||
| 1979 | Timer interrupt handler. |
||
| 1980 | |||
| 1981 | Precondition: |
||
| 1982 | None |
||
| 1983 | |||
| 1984 | Parameters: |
||
| 1985 | None |
||
| 1986 | |||
| 1987 | Return Values: |
||
| 1988 | None |
||
| 1989 | |||
| 1990 | Remarks: |
||
| 1991 | None |
||
| 1992 | ***************************************************************************/ |
||
| 1993 | //DOM-IGNORE-END |
||
| 1994 | void USBOTGClearSRPTimeOutFlag() |
||
| 1995 | { |
||
| 1996 | SRPTimeOutFlag = 0; |
||
| 1997 | } |
||
| 1998 | |||
| 1999 | |||
| 2000 | //DOM-IGNORE-BEGIN |
||
| 2001 | /**************************************************************************** |
||
| 2002 | Function: |
||
| 2003 | void USBOTGClearSRPReady() |
||
| 2004 | |||
| 2005 | Description: |
||
| 2006 | This function clears SRPReady. |
||
| 2007 | |||
| 2008 | Precondition: |
||
| 2009 | None |
||
| 2010 | |||
| 2011 | Parameters: |
||
| 2012 | None |
||
| 2013 | |||
| 2014 | Return Values: |
||
| 2015 | None |
||
| 2016 | |||
| 2017 | Remarks: |
||
| 2018 | None |
||
| 2019 | ***************************************************************************/ |
||
| 2020 | //DOM-IGNORE-END |
||
| 2021 | void USBOTGClearSRPReady() |
||
| 2022 | { |
||
| 2023 | SRPReady = 0; |
||
| 2024 | } |
||
| 2025 | |||
| 2026 | |||
| 2027 | //DOM-IGNORE-BEGIN |
||
| 2028 | /**************************************************************************** |
||
| 2029 | Function: |
||
| 2030 | void USBOTGDelayMs(WORD time) |
||
| 2031 | |||
| 2032 | Description: |
||
| 2033 | This function will delay a given amount of time in milliseconds determined by the time parameter |
||
| 2034 | passed to this function. The function uses the hardware based 1 millisecond timer. |
||
| 2035 | |||
| 2036 | Precondition: |
||
| 2037 | USB Module Must Be Enabled Prior To Calling This Function (U1PWRCbits.USBPWR = 1) |
||
| 2038 | |||
| 2039 | Parameters: |
||
| 2040 | WORD time - The time to delay in milliseconds |
||
| 2041 | |||
| 2042 | Return Values: |
||
| 2043 | BOOL - TRUE - Time Not Expired |
||
| 2044 | FALSE - Time Expired |
||
| 2045 | |||
| 2046 | Remarks: |
||
| 2047 | Assumes USB Interrupt Is Disabled |
||
| 2048 | ***************************************************************************/ |
||
| 2049 | //DOM-IGNORE-END |
||
| 2050 | void USBOTGDelayMs(WORD time) |
||
| 2051 | { |
||
| 2052 | WORD i; |
||
| 2053 | |||
| 2054 | U1OTGIR = 0x40; |
||
| 2055 | for (i=0; i < time; i++) |
||
| 2056 | { |
||
| 2057 | while(U1OTGIRbits.T1MSECIF == 0) |
||
| 2058 | {} |
||
| 2059 | U1OTGIR = 0x40; |
||
| 2060 | } |
||
| 2061 | } |
||
| 2062 | |||
| 2063 |
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