Rev Author Line No. Line
3325 kaklik 1 #include "main.h"
2  
3 #define USB_CON_SENSE_PIN PIN_D4
4  
5 #include <pic18_usb.h>
6 #include "usbconfig.h"
7 #include <usb.h>
8  
9 #include <usb.c>
10  
11  
12 /* commands from USB, must e.g. match command ids in kernel driver */
13 #define CMD_ECHO 0
14 #define CMD_GET_FUNC 1
15 #define CMD_SET_DELAY 2
16 #define CMD_GET_STATUS 3
17  
18 #define CMD_I2C_IO 4
19 #define CMD_I2C_BEGIN 1 // flag fo I2C_IO
20 #define CMD_I2C_END 2 // flag fo I2C_IO
21  
22 /* linux kernel flags */
23 #define I2C_M_TEN 0x10 /* we have a ten bit chip address */
24 #define I2C_M_RD 0x01
25 #define I2C_M_NOSTART 0x4000
26 #define I2C_M_REV_DIR_ADDR 0x2000
27 #define I2C_M_IGNORE_NAK 0x1000
28 #define I2C_M_NO_RD_ACK 0x0800
29  
30 /* To determine what functionality is present */
31 #define I2C_FUNC_I2C 0x00000001
32 #define I2C_FUNC_10BIT_ADDR 0x00000002
33 #define I2C_FUNC_PROTOCOL_MANGLING 0x00000004 /* I2C_M_{REV_DIR_ADDR,NOSTART,..} */
34 #define I2C_FUNC_SMBUS_HWPEC_CALC 0x00000008 /* SMBus 2.0 */
35 #define I2C_FUNC_SMBUS_READ_WORD_DATA_PEC 0x00000800 /* SMBus 2.0 */
36 #define I2C_FUNC_SMBUS_WRITE_WORD_DATA_PEC 0x00001000 /* SMBus 2.0 */
37 #define I2C_FUNC_SMBUS_PROC_CALL_PEC 0x00002000 /* SMBus 2.0 */
38 #define I2C_FUNC_SMBUS_BLOCK_PROC_CALL_PEC 0x00004000 /* SMBus 2.0 */
39 #define I2C_FUNC_SMBUS_BLOCK_PROC_CALL 0x00008000 /* SMBus 2.0 */
40 #define I2C_FUNC_SMBUS_QUICK 0x00010000
41 #define I2C_FUNC_SMBUS_READ_BYTE 0x00020000
42 #define I2C_FUNC_SMBUS_WRITE_BYTE 0x00040000
43 #define I2C_FUNC_SMBUS_READ_BYTE_DATA 0x00080000
44 #define I2C_FUNC_SMBUS_WRITE_BYTE_DATA 0x00100000
45 #define I2C_FUNC_SMBUS_READ_WORD_DATA 0x00200000
46 #define I2C_FUNC_SMBUS_WRITE_WORD_DATA 0x00400000
47 #define I2C_FUNC_SMBUS_PROC_CALL 0x00800000
48 #define I2C_FUNC_SMBUS_READ_BLOCK_DATA 0x01000000
49 #define I2C_FUNC_SMBUS_WRITE_BLOCK_DATA 0x02000000
50 #define I2C_FUNC_SMBUS_READ_I2C_BLOCK 0x04000000 /* I2C-like block xfer */
51 #define I2C_FUNC_SMBUS_WRITE_I2C_BLOCK 0x08000000 /* w/ 1-byte reg. addr. */
52 #define I2C_FUNC_SMBUS_READ_I2C_BLOCK_2 0x10000000 /* I2C-like block xfer */
53 #define I2C_FUNC_SMBUS_WRITE_I2C_BLOCK_2 0x20000000 /* w/ 2-byte reg. addr. */
54 #define I2C_FUNC_SMBUS_READ_BLOCK_DATA_PEC 0x40000000 /* SMBus 2.0 */
55 #define I2C_FUNC_SMBUS_WRITE_BLOCK_DATA_PEC 0x80000000 /* SMBus 2.0 */
56  
57 #define I2C_FUNC_SMBUS_BYTE I2C_FUNC_SMBUS_READ_BYTE | \
58 I2C_FUNC_SMBUS_WRITE_BYTE
59 #define I2C_FUNC_SMBUS_BYTE_DATA I2C_FUNC_SMBUS_READ_BYTE_DATA | \
60 I2C_FUNC_SMBUS_WRITE_BYTE_DATA
61 #define I2C_FUNC_SMBUS_WORD_DATA I2C_FUNC_SMBUS_READ_WORD_DATA | \
62 I2C_FUNC_SMBUS_WRITE_WORD_DATA
63 #define I2C_FUNC_SMBUS_BLOCK_DATA I2C_FUNC_SMBUS_READ_BLOCK_DATA | \
64 I2C_FUNC_SMBUS_WRITE_BLOCK_DATA
65 #define I2C_FUNC_SMBUS_I2C_BLOCK I2C_FUNC_SMBUS_READ_I2C_BLOCK | \
66 I2C_FUNC_SMBUS_WRITE_I2C_BLOCK
67  
68 #define I2C_FUNC_SMBUS_EMUL I2C_FUNC_SMBUS_QUICK | \
69 I2C_FUNC_SMBUS_BYTE | \
70 I2C_FUNC_SMBUS_BYTE_DATA | \
71 I2C_FUNC_SMBUS_WORD_DATA | \
72 I2C_FUNC_SMBUS_PROC_CALL | \
73 I2C_FUNC_SMBUS_WRITE_BLOCK_DATA | \
74 I2C_FUNC_SMBUS_WRITE_BLOCK_DATA_PEC | \
75 I2C_FUNC_SMBUS_I2C_BLOCK
76  
77 /* ------------------------------------------------------------------------- */
78 #define DEFAULT_DELAY 10 // default 10us (100khz)
79 static unsigned clock_delay = DEFAULT_DELAY;
80 static unsigned clock_delay2 = DEFAULT_DELAY/2;
81  
82 static unsigned short expected;
83 static unsigned char saved_cmd;
84  
85 unsigned int8 control_data[8];
86  
87 struct i2c_cmd {
88 unsigned char type;
89 unsigned char cmd;
90 unsigned short flags;
91 unsigned short addr;
92 unsigned short len;
93 };
94  
95 #define STATUS_IDLE 0
96 #define STATUS_ADDRESS_ACK 1
97 #define STATUS_ADDRESS_NAK 2
98  
99 unsigned int8 status = STATUS_IDLE;
100  
101 void main()
102 {
3331 kaklik 103 unsigned int8 data[64];
3325 kaklik 104 unsigned int8 replyBuf[4];
3326 kaklik 105 unsigned int8 i=0;
3325 kaklik 106  
107 setup_adc_ports(NO_ANALOGS|VSS_VDD);
108 setup_adc(ADC_CLOCK_DIV_2);
109 setup_psp(PSP_DISABLED);
110 setup_wdt(WDT_OFF);
111 setup_timer_0(RTCC_INTERNAL);
112 setup_timer_1(T1_DISABLED);
113 setup_timer_2(T2_DISABLED,0,1);
114 setup_timer_3(T3_DISABLED|T3_DIV_BY_1);
115 setup_ccp1(CCP_OFF);
116 setup_comparator(NC_NC_NC_NC);
117 setup_vref(FALSE);
118  
3326 kaklik 119 printf("MLAB I2C to USB adapter started \n\r ");
3325 kaklik 120  
3326 kaklik 121 output_high(PIN_B4);
3325 kaklik 122  
3326 kaklik 123 usb_init();
3331 kaklik 124 usb_wait_for_enumeration();
3325 kaklik 125  
3331 kaklik 126  
127 printf("device enumerated \n\r ");
128  
129 if(usb_tbe(0)) printf(" endpoint 0 ready \n\r ");
130 else printf(" endpoint 0 disabled \n\r ");
131 if(usb_tbe(1)) printf(" endpoint 1 ready \n\r ");
132 else printf(" endpoint 1 disabled \n\r ");
133 if(usb_tbe(2)) printf(" endpoint 2 ready \n\r ");
134 else printf(" endpoint 2 disabled \n\r ");
135  
136 if(usb_puts(0,data,64,1000)) printf(" endpoint 0 inicialized \n\r ");
137 else printf("cannot write to endpoint 0 \n\r ");
138  
3325 kaklik 139 while (TRUE) {
140 if (usb_enumerated())
141 {
142  
3326 kaklik 143 output_low(PIN_B4);
144  
145 /* if(usb_kbhit(0))
3325 kaklik 146 {
3326 kaklik 147 printf("control data received... \n\r");
148  
149 usb_gets(0,control_data,8,100);
150  
151 switch(control_data[1])
152 {
153 case CMD_ECHO: // echo (for transfer reliability testing)
154 replyBuf[0] = control_data[2];
155 replyBuf[1] = control_data[3];
156 usb_puts(0,replyBuf,2,50);
157 break;
158  
159 case CMD_GET_FUNC:
160 usb_puts(0,(I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL),32,50);
161 break;
162  
163 case CMD_SET_DELAY:
164 clock_delay = *(unsigned short*)(control_data+2);
165 if(!clock_delay) clock_delay = 1;
166 clock_delay2 = clock_delay/2;
167 if(!clock_delay2) clock_delay2 = 1;
168 break;
169  
170 case CMD_I2C_IO:
171 case CMD_I2C_IO + CMD_I2C_BEGIN:
172 case CMD_I2C_IO + CMD_I2C_END:
173 case CMD_I2C_IO + CMD_I2C_BEGIN + CMD_I2C_END:
174 // these are only allowed as class transfers
175  
176 return i2c_do((struct i2c_cmd*)data);
177 break;
178  
179 case CMD_GET_STATUS:
180 replyBuf[0] = status;
181 usb_puts(0,replyBuf,1,50);
182 break;
183  
184 default:
185 // must not happen ...
186 break;
187 }
188 }*/
189  
190 if(usb_kbhit(i))
191 {
192 printf(" data received at endpoint %d \n\r ", i);
3331 kaklik 193 usb_gets(i,data,64,1000);
3325 kaklik 194 }
195  
196 delay_ms(10);
3326 kaklik 197  
198 output_high(PIN_B4);
3331 kaklik 199 if( i==1 )i=0;
200 else i=1;
3325 kaklik 201 }
202 }
203 }