| 0,0 → 1,77 |
|---|
| #ifndef __twi_aap_h__ |
| #define __two_aap_h__ |
| |
| #include <compat/twi.h> |
| |
| #include "common.h" |
| #include "usart.h" |
| #include "guids.h" |
| #include "eeprom.h" |
| //#define SERIAL_DBG |
| |
| namespace EEPROM_layout { |
| const uint16_t TWI_SoftAddr_Ofs = 0xff; |
| } |
| |
| namespace TWI { |
| const uint8_t GeneralCallAddr = 0; |
| const size_t UniqueID_Size = 16*3; |
| const size_t GUID_Size = sizeof(GUID); |
| |
| struct sConfigRecord { |
| uint8_t UniqueID[UniqueID_Size]; |
| GUID ClassID; |
| GUID DevID; |
| }; |
| |
| enum TWI_AAPCommands { |
| TWI_AAPCmd_Reserved = 0, |
| TWI_AAPCmd_Start = 0x20, |
| TWI_AAPCmd_End = 0x21, |
| TWI_AAPCmd_ResetDevices = 0x22, |
| TWI_AAPCmd_ResetToPermAddress = 0x23, |
| TWI_AAPCmd_GetConfig = 0x24, |
| TWI_AAPCmd_AssignAddress = 0x25 |
| }; |
| enum MainStates { |
| MS_Idle = 0, |
| MS_Addressed, |
| AAP_CmdGetConfig_GetAddress, |
| AAP_CmdGetConfig_SendConfig, |
| AAP_CmdAssignAddress_GetUniqueID, |
| AAP_CmdAssignAddress_GetAddress, |
| US_Base |
| }; |
| |
| extern uint8_t State; |
| extern uint8_t LastCmd; |
| extern uint8_t SoftAddress; |
| |
| inline void Init() { |
| TWBR = 32; // 100kHz with an 8MHz crystal |
| // TWBR = 16; // 200kHz with an 8MHz crystal |
| TWSR = 0; // pre-scaler: 1 |
| TWCR = (1 << TWEA) | (1 << TWEN) | (1 << TWIE) | (1 << TWINT); |
| if (TWSR == TW_BUS_ERROR) SETBIT(TWCR,(1 << TWSTO)); // reset TWI |
| TWAMR = 0; // all address bits matter |
| State = MS_Idle; |
| SoftAddress = EEPROM::GetByte(EEPROM_layout::TWI_SoftAddr_Ofs); |
| if (SoftAddress == 0xff) SoftAddress = 0; |
| SoftAddress &= 0xfe; |
| // TWAR = GeneralCallAddr | 1; // General call recognition and slave-receiver mode through address being 0 |
| TWAR = SoftAddress | 1; |
| LastCmd = TWI_AAPCmd_Reserved; |
| } |
| |
| // These used in all states, including user states, so make them available. |
| extern uint8_t TWIStatus; |
| extern uint8_t TWIData; |
| extern uint8_t TWIPrevData; |
| extern uint8_t TWIControl; |
| |
| void ResetTWITransmit(); |
| void ResetTWIReceive(); |
| void ResetTWI(); |
| } |
| |
| #endif // __twi_aap_h__ |