Super Vision / Mbed 2 deprecated sv_usb_firmware

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Dependencies:   MODSERIAL USBDevice_for_Rev_C_HW mbed

Fork of mbed_sv_firmware_with_init by Bob Recny

main.cpp@8:3313aa7f9082, 2015-01-22 (annotated)

Committer:
bob_tpc
Date:
Thu Jan 22 19:14:46 2015 +0000
Revision:
8:3313aa7f9082
Parent:
6:2941452a0e6d
Child:
9:046247707ffb
GPIO in progress

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bob_tpc 0:8604e9cc07f2 1 #include "mbed.h"
bob_tpc 0:8604e9cc07f2 2 #include "USBSerial.h"
bob_tpc 0:8604e9cc07f2 3 #include "MODSERIAL.h"
bob_tpc 0:8604e9cc07f2 4 #include "InterruptIn.h"
bob_tpc 0:8604e9cc07f2 5
bob_tpc 0:8604e9cc07f2 6 // Constants
bob_tpc 0:8604e9cc07f2 7 #define LEDON 0 // Low active for LEDs - turns LED on
bob_tpc 0:8604e9cc07f2 8 #define LEDOFF 1 // Low active for LEDs - turns LED off
bob_tpc 0:8604e9cc07f2 9 #define TRUE 1
bob_tpc 0:8604e9cc07f2 10 #define FALSE 0
bob_tpc 0:8604e9cc07f2 11
bob_tpc 0:8604e9cc07f2 12
bob_tpc 0:8604e9cc07f2 13 // Error return values
bob_tpc 0:8604e9cc07f2 14 #define ERR_NONE 0 // Success
bob_tpc 1:bd988d267998 15 #define ERR_CDC_BAD_CMD 1 // First byte of PC to USB board needs to be 0xBB, 0xCC, 0xDD or 0xEE;
bob_tpc 1:bd988d267998 16 #define ERR_CDC_NO_TX_ENDMARK 2 // message for no endmark on message to PC
bob_tpc 0:8604e9cc07f2 17 #define ERR_UART_NOT_WRITEABLE 3 // UART has no buffer space
bob_tpc 1:bd988d267998 18 #define ERR_UART_NO_TX_ENDMARK 4 // message for UART has no 0x7E end-mark
bob_tpc 0:8604e9cc07f2 19 #define ERR_UART_NO_RX_ENDMARK 5 // message received from UART has no end-mark
bob_tpc 4:13e3e375c0d3 20 #define ERR_I2C_NOT_WRITEABLE 6 // UART has no buffer space
bob_tpc 4:13e3e375c0d3 21 #define ERR_I2C_NO_TX_ENDMARK 7 // message for UART has no 0x7E end-mark
bob_tpc 4:13e3e375c0d3 22 #define ERR_I2C_NO_RX_ENDMARK 8 // message received from UART has no end-mark
bob_tpc 4:13e3e375c0d3 23 #define ERR_NOT_IMPLEMENTED 255 // method has not yet been implemented
bob_tpc 0:8604e9cc07f2 24
bob_tpc 0:8604e9cc07f2 25
bob_tpc 0:8604e9cc07f2 26 // I2C addresses
bob_tpc 0:8604e9cc07f2 27 #define PROX (0x29 << 1) // default I2C address of VL6180X, shift into upper 7 bits
bob_tpc 0:8604e9cc07f2 28 #define EEPROM (0xA0) // default I2C address of EEPROM, already shifted
bob_tpc 6:2941452a0e6d 29 #define I2CRATE 400000 // I2C speed
bob_tpc 0:8604e9cc07f2 30
bob_tpc 0:8604e9cc07f2 31 // UART-RFID baud rate
bob_tpc 0:8604e9cc07f2 32 #define RFIDBAUD 115200 // RFID-FE board default rate = 115.2Kbps
bob_tpc 0:8604e9cc07f2 33
bob_tpc 0:8604e9cc07f2 34 // Peripherals
bob_tpc 0:8604e9cc07f2 35 USBSerial cdc; // CDC Class USB<>Serial adapter. Needs custom INF, but uses existing Windows drivers.
bob_tpc 0:8604e9cc07f2 36 MODSERIAL uart(PTA2, PTA1); // UART port connected to RFID-FE board
bob_tpc 0:8604e9cc07f2 37 I2C i2c(PTB1, PTB0); // I2C port connected to VL6180X and EEPROM - note addresses above)
bob_tpc 0:8604e9cc07f2 38
bob_tpc 0:8604e9cc07f2 39 // GPIO signals
bob_tpc 0:8604e9cc07f2 40 DigitalOut led_err(PTC1); // Red LED shows error condition (active low)
bob_tpc 0:8604e9cc07f2 41 DigitalOut led_com(PTC2); // Yellow LED shows communication activity (active low)
bob_tpc 0:8604e9cc07f2 42 DigitalOut rfid_int(PTD4); // RFID FE power control (active high)
bob_tpc 0:8604e9cc07f2 43 DigitalOut rfid_isp(PTD5); // RFID FE In-System Programming (active high)
bob_tpc 0:8604e9cc07f2 44 DigitalOut rfid_rst(PTD6); // RFID FE Reset (active high)
bob_tpc 0:8604e9cc07f2 45 DigitalOut rfid_pwr(PTE30); // RFID power switch on USB board (active high for prototype 1, low for all others)
bob_tpc 0:8604e9cc07f2 46 DigitalIn rfid_hot(PTE0); // RFID over-current detection on USB board power switch (active low)
bob_tpc 0:8604e9cc07f2 47 InterruptIn prox_int(PTD7); // Proximity sensor interrupt (active low)
bob_tpc 0:8604e9cc07f2 48
bob_tpc 0:8604e9cc07f2 49 // buffers & variables
bob_tpc 5:e77529f7ede3 50 uint8_t gpio_values = 0x00; // register to read GPIO values
bob_tpc 5:e77529f7ede3 51
bob_tpc 6:2941452a0e6d 52 uint8_t cdc_buffer_rx[32] = {0xBB, 0x00, 0x03, 0x00, 0x01, 0x02, 0x7E, 0x2E, 0xC9}; // buffers for cdc (USB-Serial port on PC)
bob_tpc 0:8604e9cc07f2 53 uint8_t cdc_buffer_tx[32];
bob_tpc 0:8604e9cc07f2 54 uint8_t uart_buffer_rx[32]; // buffers for uart (RFID-FE board)
bob_tpc 0:8604e9cc07f2 55 uint8_t uart_buffer_tx[32];
bob_tpc 5:e77529f7ede3 56 uint8_t gpio_buffer[32]; // buffer for GPIO messages
bob_tpc 5:e77529f7ede3 57 char i2c_buffer[32]; // buffer for I2C devices - Proximity sensor and EEPROM - up to 256 bytes data payload for EEPROM, up to 4 for proximity
bob_tpc 0:8604e9cc07f2 58 int i, j; // index variables
bob_tpc 0:8604e9cc07f2 59 int status = 0x00; // return value
bob_tpc 0:8604e9cc07f2 60
bob_tpc 0:8604e9cc07f2 61 int prox_irq(void)
bob_tpc 0:8604e9cc07f2 62 {
bob_tpc 0:8604e9cc07f2 63 return 0;
bob_tpc 0:8604e9cc07f2 64 }
bob_tpc 0:8604e9cc07f2 65
bob_tpc 0:8604e9cc07f2 66 int init_periph(void)
bob_tpc 0:8604e9cc07f2 67 {
bob_tpc 0:8604e9cc07f2 68 // Set up peripherals
bob_tpc 0:8604e9cc07f2 69 // RFID
bob_tpc 5:e77529f7ede3 70 uart.baud(RFIDBAUD); // RFID-FE baud rate
bob_tpc 0:8604e9cc07f2 71
bob_tpc 5:e77529f7ede3 72 rfid_int = 0; // RFID FE power control (active high)
bob_tpc 5:e77529f7ede3 73 rfid_isp = 0; // RFID FE In-System Programming (active high)
bob_tpc 5:e77529f7ede3 74 rfid_rst = 1; // RFID FE Reset (active high)
bob_tpc 5:e77529f7ede3 75 rfid_pwr = 1; // RFID power switch on USB board (active high for prototype 1, low for all others)
bob_tpc 5:e77529f7ede3 76 wait(0.25); // wait 250ms before...
bob_tpc 5:e77529f7ede3 77 rfid_rst = 0; // ... taking RFID out of reset
bob_tpc 0:8604e9cc07f2 78
bob_tpc 5:e77529f7ede3 79 // Prox & EEPROM
bob_tpc 6:2941452a0e6d 80 i2c.frequency(I2CRATE); // I2C speed = 400Kbps
bob_tpc 5:e77529f7ede3 81 prox_int.mode(PullUp); // pull up proximity sensor interrupt at MCU
bob_tpc 5:e77529f7ede3 82
bob_tpc 5:e77529f7ede3 83 // LEDs // Cycle through the LEDs.
bob_tpc 5:e77529f7ede3 84 led_err.write(LEDON);
bob_tpc 5:e77529f7ede3 85 led_com.write(LEDON);
bob_tpc 5:e77529f7ede3 86 wait(0.5);
bob_tpc 5:e77529f7ede3 87 led_err.write(LEDOFF);
bob_tpc 5:e77529f7ede3 88 wait(0.5);
bob_tpc 5:e77529f7ede3 89 led_com.write(LEDOFF);
bob_tpc 5:e77529f7ede3 90
bob_tpc 0:8604e9cc07f2 91 return 0;
bob_tpc 0:8604e9cc07f2 92 }
bob_tpc 0:8604e9cc07f2 93
bob_tpc 4:13e3e375c0d3 94 /*
bob_tpc 4:13e3e375c0d3 95 RFID messages are as defined in the RFID-FE manual.
bob_tpc 4:13e3e375c0d3 96 */
bob_tpc 0:8604e9cc07f2 97 int rfid_msg(void)
bob_tpc 0:8604e9cc07f2 98 {
bob_tpc 0:8604e9cc07f2 99 bool end_mark = FALSE;
bob_tpc 0:8604e9cc07f2 100 int i;
bob_tpc 5:e77529f7ede3 101 uint8_t crcCount = sizeof(uart_buffer_tx); // use tx buffer size to start
bob_tpc 0:8604e9cc07f2 102
bob_tpc 5:e77529f7ede3 103 uart.txBufferFlush(); // clear out UART buffers
bob_tpc 0:8604e9cc07f2 104 uart.rxBufferFlush();
bob_tpc 0:8604e9cc07f2 105
bob_tpc 0:8604e9cc07f2 106 for (int i = 0; i < sizeof(uart_buffer_tx); i++)
bob_tpc 0:8604e9cc07f2 107 {
bob_tpc 5:e77529f7ede3 108 if (!uart.writeable())
bob_tpc 5:e77529f7ede3 109 {
bob_tpc 5:e77529f7ede3 110 led_err.write(LEDON);
bob_tpc 5:e77529f7ede3 111 return ERR_UART_NOT_WRITEABLE; // if no space in uart, return error
bob_tpc 5:e77529f7ede3 112 }
bob_tpc 6:2941452a0e6d 113
bob_tpc 5:e77529f7ede3 114 uart.putc(uart_buffer_tx[i]); // send uart message
bob_tpc 0:8604e9cc07f2 115
bob_tpc 5:e77529f7ede3 116 if (uart_buffer_tx[i] == 0x7E) // check for rfid end mark in outbound message
bob_tpc 0:8604e9cc07f2 117 {
bob_tpc 5:e77529f7ede3 118 crcCount = 2; // two more bytes for CRC
bob_tpc 5:e77529f7ede3 119 end_mark = TRUE; // end mark was reached
bob_tpc 0:8604e9cc07f2 120 }
bob_tpc 5:e77529f7ede3 121 if (crcCount-- == 0) // end of message
bob_tpc 0:8604e9cc07f2 122 {
bob_tpc 5:e77529f7ede3 123 if (end_mark == FALSE)
bob_tpc 5:e77529f7ede3 124 {
bob_tpc 5:e77529f7ede3 125 led_err.write(LEDON);
bob_tpc 5:e77529f7ede3 126 return ERR_UART_NO_TX_ENDMARK; // no end mark detected
bob_tpc 5:e77529f7ede3 127 }
bob_tpc 0:8604e9cc07f2 128 break;
bob_tpc 0:8604e9cc07f2 129 }
bob_tpc 0:8604e9cc07f2 130 }
bob_tpc 0:8604e9cc07f2 131
bob_tpc 0:8604e9cc07f2 132 end_mark = FALSE;
bob_tpc 5:e77529f7ede3 133 while(!uart.readable()); // wait for data from rfid
bob_tpc 5:e77529f7ede3 134 crcCount = sizeof(uart_buffer_rx); // use rx buffer size to start
bob_tpc 0:8604e9cc07f2 135 for (i = 0; i < sizeof(uart_buffer_rx); i++)
bob_tpc 0:8604e9cc07f2 136 {
bob_tpc 5:e77529f7ede3 137 uart_buffer_rx[i] = uart.getc(); // read a character
bob_tpc 0:8604e9cc07f2 138
bob_tpc 5:e77529f7ede3 139 if (uart_buffer_rx[i] == 0x7E) // check for rfid end mark in inbound message
bob_tpc 0:8604e9cc07f2 140 {
bob_tpc 5:e77529f7ede3 141 crcCount = 2; // two more bytes for crc
bob_tpc 5:e77529f7ede3 142 end_mark = TRUE; // end mark was reached
bob_tpc 0:8604e9cc07f2 143 }
bob_tpc 5:e77529f7ede3 144 if (crcCount-- == 0) // end of message
bob_tpc 0:8604e9cc07f2 145 {
bob_tpc 5:e77529f7ede3 146 if (end_mark == FALSE)
bob_tpc 5:e77529f7ede3 147 {
bob_tpc 5:e77529f7ede3 148 led_err.write(LEDON);
bob_tpc 5:e77529f7ede3 149 return ERR_UART_NO_RX_ENDMARK;
bob_tpc 5:e77529f7ede3 150 }
bob_tpc 0:8604e9cc07f2 151 break;
bob_tpc 0:8604e9cc07f2 152 }
bob_tpc 0:8604e9cc07f2 153 }
bob_tpc 0:8604e9cc07f2 154 return ERR_NONE;
bob_tpc 0:8604e9cc07f2 155 }
bob_tpc 0:8604e9cc07f2 156
bob_tpc 0:8604e9cc07f2 157
bob_tpc 4:13e3e375c0d3 158 /*
bob_tpc 8:3313aa7f9082 159 I2C-prox messages = 0xCC, r/w#, number of data bytes, index (2 bytes), data bytes, 0x7E, 0xXX, 0xXX - last two are fillers where CRC goes for RFID
bob_tpc 4:13e3e375c0d3 160
bob_tpc 4:13e3e375c0d3 161 Multiple registers can be read or written with single prox_msg_rd() or prox_msg_wr(). Location address increments for each byte.
bob_tpc 4:13e3e375c0d3 162 */
bob_tpc 4:13e3e375c0d3 163
bob_tpc 5:e77529f7ede3 164 int prox_msg_wr() // write proximity I2C register
bob_tpc 0:8604e9cc07f2 165 {
bob_tpc 4:13e3e375c0d3 166 int i2c_err;
bob_tpc 4:13e3e375c0d3 167 i2c_err = i2c.write(PROX, &i2c_buffer[3], i2c_buffer[2] + 2, 0);// I2C Address, pointer to buffer, number of bytes (for index + data), stop at end.
bob_tpc 5:e77529f7ede3 168 return i2c_err; // 0 = ACK received, 1 = NAK/failure
bob_tpc 4:13e3e375c0d3 169 }
bob_tpc 3:e8cc286f9b2e 170
bob_tpc 4:13e3e375c0d3 171 int prox_msg_rd()
bob_tpc 4:13e3e375c0d3 172 {
bob_tpc 4:13e3e375c0d3 173 int i2c_err;
bob_tpc 5:e77529f7ede3 174 i2c_err = i2c.write(PROX, &i2c_buffer[3], 2, 1); // I2C Address, pointer to buffer (just the index), index, number of bytes (2 for index), no stop at end.
bob_tpc 5:e77529f7ede3 175 i2c_err |= i2c.read(PROX, &i2c_buffer[5], i2c_buffer[2], 0); // I2C Address, pointer to buffer (just the data), number of data bytes, stop at end.
bob_tpc 5:e77529f7ede3 176 return i2c_err; // 0 = ACK received, 1 = NAK/failure
bob_tpc 4:13e3e375c0d3 177 }
bob_tpc 4:13e3e375c0d3 178
bob_tpc 8:3313aa7f9082 179 // GPIO messages = 0xDD, r/w#, value, 0x7E, 0xXX, 0xXX - last two are fillers where CRC goes for RFID
bob_tpc 5:e77529f7ede3 180 int gpio_rd()
bob_tpc 5:e77529f7ede3 181 {
bob_tpc 6:2941452a0e6d 182 led_err.write(LEDON);
bob_tpc 6:2941452a0e6d 183 led_com.write(LEDON);
bob_tpc 6:2941452a0e6d 184 rfid_int.write(0);
bob_tpc 6:2941452a0e6d 185 rfid_isp.write(0);
bob_tpc 6:2941452a0e6d 186 cdc.putc( led_err.read());// && 0x01); // read all of the GPIO pins and store in a single byte
bob_tpc 6:2941452a0e6d 187 cdc.putc( led_com.read());// << 1) && 0x02);
bob_tpc 6:2941452a0e6d 188 cdc.putc( rfid_int.read());// << 2) && 0x04);
bob_tpc 6:2941452a0e6d 189 cdc.putc( rfid_isp.read());// << 3) && 0x08);
bob_tpc 6:2941452a0e6d 190
bob_tpc 5:e77529f7ede3 191
bob_tpc 5:e77529f7ede3 192 return ERR_NONE;
bob_tpc 5:e77529f7ede3 193 }
bob_tpc 4:13e3e375c0d3 194
bob_tpc 5:e77529f7ede3 195 int gpio_wr()
bob_tpc 5:e77529f7ede3 196 {
bob_tpc 8:3313aa7f9082 197 cdc.putc(gpio_buffer[2]);
bob_tpc 6:2941452a0e6d 198 cdc.putc(gpio_buffer[2] && 0x01);
bob_tpc 6:2941452a0e6d 199 cdc.putc(gpio_buffer[2] && 0x02);
bob_tpc 6:2941452a0e6d 200 cdc.putc(gpio_buffer[2] && 0x04);
bob_tpc 6:2941452a0e6d 201 cdc.putc(gpio_buffer[2] && 0x08);
bob_tpc 6:2941452a0e6d 202 cdc.putc(gpio_buffer[2] && 0x10);
bob_tpc 6:2941452a0e6d 203 cdc.putc(gpio_buffer[2] && 0x20);
bob_tpc 5:e77529f7ede3 204 led_err.write(gpio_buffer[2] && 0x01); // any bit set will write a 0
bob_tpc 5:e77529f7ede3 205 led_com.write(gpio_buffer[2] && 0x02); // any bit set will write a 0
bob_tpc 5:e77529f7ede3 206 rfid_int.write(gpio_buffer[2] && 0x04); // any bit set will write a 0
bob_tpc 5:e77529f7ede3 207 rfid_isp.write(gpio_buffer[2] && 0x05); // any bit set will write a 0
bob_tpc 5:e77529f7ede3 208 rfid_rst.write(gpio_buffer[2] && 0x10); // any bit set will write a 0
bob_tpc 5:e77529f7ede3 209 rfid_pwr.write(gpio_buffer[2] && 0x20); // any bit set will write a 0
bob_tpc 5:e77529f7ede3 210 return ERR_NONE;
bob_tpc 5:e77529f7ede3 211 }
bob_tpc 5:e77529f7ede3 212
bob_tpc 5:e77529f7ede3 213
bob_tpc 4:13e3e375c0d3 214 /*
bob_tpc 4:13e3e375c0d3 215 I2C-EEPROM messages = 0xEE, r/w, number of data bytes, block, address, data bytes, 0x7E, 0xXX, 0xXX - last two are fillers where CRC goes for RFID
bob_tpc 4:13e3e375c0d3 216
bob_tpc 4:13e3e375c0d3 217 Multiple registers can be read or written with single eeprom_msg_rd() or eeprom_msg_wr(). Location address increments for each byte.
bob_tpc 4:13e3e375c0d3 218 This practically the the same as the proximity calls, except the index/location is only one byte and the block select is part of the I2C address byte.
bob_tpc 4:13e3e375c0d3 219 */
bob_tpc 4:13e3e375c0d3 220
bob_tpc 5:e77529f7ede3 221 int eeprom_msg_wr() // write proximity I2C register
bob_tpc 4:13e3e375c0d3 222 {
bob_tpc 4:13e3e375c0d3 223 int i2c_err;
bob_tpc 5:e77529f7ede3 224 i2c_err = i2c.write((EEPROM || i2c_buffer[3]), &i2c_buffer[4], i2c_buffer[2] + 1, 0);
bob_tpc 5:e77529f7ede3 225 // I2C Address & block select, pointer to buffer, number of bytes (for address + data), stop at end.
bob_tpc 5:e77529f7ede3 226 while (!i2c.write(EEPROM || i2c_buffer[3])); // wait until write is done (EEPROM will ACK = 1 for single byte i2c.write)
bob_tpc 5:e77529f7ede3 227 return i2c_err; // 0 = ACK received, 1 = NAK/failure
bob_tpc 4:13e3e375c0d3 228 }
bob_tpc 3:e8cc286f9b2e 229
bob_tpc 4:13e3e375c0d3 230 int eeprom_msg_rd()
bob_tpc 4:13e3e375c0d3 231 {
bob_tpc 4:13e3e375c0d3 232 int i2c_err;
bob_tpc 5:e77529f7ede3 233 i2c_err = i2c.write((EEPROM || i2c_buffer[3]), &i2c_buffer[4], 1, 1);
bob_tpc 5:e77529f7ede3 234 // I2C Address & block select, pointer to buffer (just the index), index, number of bytes (for address + data), no stop at end.
bob_tpc 5:e77529f7ede3 235 i2c_err |= i2c.read((EEPROM || i2c_buffer[3]), &i2c_buffer[5], i2c_buffer[2], 0);
bob_tpc 5:e77529f7ede3 236 // I2C Address & block select, pointer to buffer (just the data), number of data bytes, stop at end.
bob_tpc 5:e77529f7ede3 237 return i2c_err; // 0 = ACK received, 1 = NAK/failure
bob_tpc 0:8604e9cc07f2 238 }
bob_tpc 0:8604e9cc07f2 239
bob_tpc 5:e77529f7ede3 240
bob_tpc 0:8604e9cc07f2 241
bob_tpc 0:8604e9cc07f2 242 int main()
bob_tpc 0:8604e9cc07f2 243 {
bob_tpc 0:8604e9cc07f2 244 // initialize everything
bob_tpc 6:2941452a0e6d 245
bob_tpc 6:2941452a0e6d 246 wait(2.0);
bob_tpc 0:8604e9cc07f2 247
bob_tpc 0:8604e9cc07f2 248 init_periph();
bob_tpc 0:8604e9cc07f2 249
bob_tpc 6:2941452a0e6d 250
bob_tpc 5:e77529f7ede3 251 while(1)
bob_tpc 0:8604e9cc07f2 252 {
bob_tpc 5:e77529f7ede3 253 led_com.write(LEDOFF); // turn off communication LED
bob_tpc 5:e77529f7ede3 254 while(!cdc.readable()); // spin here until a message comes in from the host PC
bob_tpc 5:e77529f7ede3 255 led_com.write(LEDON); // Message received - turn on LED
bob_tpc 5:e77529f7ede3 256 bool end_mark = FALSE;
bob_tpc 5:e77529f7ede3 257 uint8_t crcCount = sizeof(cdc_buffer_rx); // use tx buffer size to start
bob_tpc 5:e77529f7ede3 258 for (i = 0; i < sizeof(cdc_buffer_rx); i++)
bob_tpc 0:8604e9cc07f2 259 {
bob_tpc 5:e77529f7ede3 260 cdc_buffer_rx[i] = cdc.getc(); // read data from USB side
bob_tpc 5:e77529f7ede3 261
bob_tpc 5:e77529f7ede3 262 if (cdc_buffer_rx[i] == 0x7E) // check for rfid end mark in outbound message
bob_tpc 5:e77529f7ede3 263 {
bob_tpc 5:e77529f7ede3 264 crcCount = 2; // two more bytes for CRC
bob_tpc 5:e77529f7ede3 265 end_mark = TRUE; // end mark was reached
bob_tpc 5:e77529f7ede3 266 }
bob_tpc 5:e77529f7ede3 267 if (crcCount-- == 0) // end of message
bob_tpc 5:e77529f7ede3 268 {
bob_tpc 5:e77529f7ede3 269 if (end_mark == FALSE) return ERR_UART_NO_TX_ENDMARK; // no end mark detected
bob_tpc 5:e77529f7ede3 270 break;
bob_tpc 5:e77529f7ede3 271 }
bob_tpc 0:8604e9cc07f2 272 }
bob_tpc 0:8604e9cc07f2 273
bob_tpc 5:e77529f7ede3 274 switch(cdc_buffer_rx[0])
bob_tpc 5:e77529f7ede3 275 {
bob_tpc 5:e77529f7ede3 276 case 0xBB: // RFID-FE
bob_tpc 5:e77529f7ede3 277 for (i = 0; i < sizeof(cdc_buffer_rx); i++)
bob_tpc 5:e77529f7ede3 278 {
bob_tpc 5:e77529f7ede3 279 uart_buffer_tx[i] = cdc_buffer_rx[i]; // copy USB message to UART for RFID
bob_tpc 5:e77529f7ede3 280 }
bob_tpc 5:e77529f7ede3 281
bob_tpc 5:e77529f7ede3 282 status = rfid_msg(); // send buffer to RFID and get response according to RFID board
bob_tpc 0:8604e9cc07f2 283
bob_tpc 5:e77529f7ede3 284 for (i = 0; i < sizeof(cdc_buffer_tx); i++)
bob_tpc 5:e77529f7ede3 285 {
bob_tpc 5:e77529f7ede3 286 cdc_buffer_tx[i] = uart_buffer_rx[i]; // copy RFID response back to USB buffer
bob_tpc 5:e77529f7ede3 287 }
bob_tpc 5:e77529f7ede3 288
bob_tpc 5:e77529f7ede3 289 for (i = 0; i < sizeof(cdc_buffer_tx); i++)
bob_tpc 5:e77529f7ede3 290 {
bob_tpc 5:e77529f7ede3 291 cdc.putc(cdc_buffer_tx[i]); // send message back to PC
bob_tpc 5:e77529f7ede3 292
bob_tpc 5:e77529f7ede3 293 if (cdc_buffer_tx[i] == 0x7E) // check for rfid end mark in outbound message
bob_tpc 5:e77529f7ede3 294 {
bob_tpc 5:e77529f7ede3 295 crcCount = 2; // two more bytes for CRC
bob_tpc 5:e77529f7ede3 296 end_mark = TRUE; // end mark was reached
bob_tpc 5:e77529f7ede3 297 }
bob_tpc 5:e77529f7ede3 298 if (crcCount-- == 0) // end of message
bob_tpc 5:e77529f7ede3 299 {
bob_tpc 5:e77529f7ede3 300 if (end_mark == FALSE) return ERR_CDC_NO_TX_ENDMARK; // no end mark detected
bob_tpc 5:e77529f7ede3 301 break;
bob_tpc 5:e77529f7ede3 302 }
bob_tpc 5:e77529f7ede3 303 }
bob_tpc 5:e77529f7ede3 304 break;
bob_tpc 0:8604e9cc07f2 305
bob_tpc 5:e77529f7ede3 306 case 0xCC: // Proximity Sensor
bob_tpc 5:e77529f7ede3 307 //I2C-prox messages = 0xCC, r/w, number of data bytes, index, data bytes, 0x7E, 0xXX, 0xXX - last two are fillers where CRC goes for RFID
bob_tpc 5:e77529f7ede3 308 for (i = 0; i < sizeof(cdc_buffer_rx); i++)
bob_tpc 0:8604e9cc07f2 309 {
bob_tpc 5:e77529f7ede3 310 i2c_buffer[i] = cdc_buffer_rx[i]; // copy USB message to buffer for I2C
bob_tpc 0:8604e9cc07f2 311 }
bob_tpc 5:e77529f7ede3 312
bob_tpc 5:e77529f7ede3 313 if (i2c_buffer[1] == 1) // I2C read = 1
bob_tpc 5:e77529f7ede3 314 status = prox_msg_rd(); // read the requested data
bob_tpc 5:e77529f7ede3 315 else if (i2c_buffer[1] == 0) // I2C write = 0
bob_tpc 5:e77529f7ede3 316 status = prox_msg_wr(); // send buffer to proximity sensor and get response
bob_tpc 5:e77529f7ede3 317
bob_tpc 5:e77529f7ede3 318 for (i = 0; i < sizeof(cdc_buffer_tx); i++)
bob_tpc 0:8604e9cc07f2 319 {
bob_tpc 5:e77529f7ede3 320 cdc_buffer_tx[i] = i2c_buffer[i]; // copy prox response back to USB buffer
bob_tpc 0:8604e9cc07f2 321 }
bob_tpc 3:e8cc286f9b2e 322
bob_tpc 5:e77529f7ede3 323 for (i = 0; i < sizeof(cdc_buffer_tx); i++)
bob_tpc 5:e77529f7ede3 324 {
bob_tpc 5:e77529f7ede3 325 cdc.putc(cdc_buffer_tx[i]); // send message back to PC
bob_tpc 5:e77529f7ede3 326
bob_tpc 5:e77529f7ede3 327 if (cdc_buffer_tx[i] == 0x7E) // check for rfid end mark in outbound message
bob_tpc 5:e77529f7ede3 328 {
bob_tpc 5:e77529f7ede3 329 crcCount = 2; // two more bytes for CRC
bob_tpc 5:e77529f7ede3 330 end_mark = TRUE; // end mark was reached
bob_tpc 5:e77529f7ede3 331 }
bob_tpc 5:e77529f7ede3 332 if (crcCount-- == 0) // end of message
bob_tpc 5:e77529f7ede3 333 {
bob_tpc 5:e77529f7ede3 334 if (end_mark == FALSE) return ERR_CDC_NO_TX_ENDMARK; // no end mark detected
bob_tpc 5:e77529f7ede3 335 break;
bob_tpc 5:e77529f7ede3 336 }
bob_tpc 5:e77529f7ede3 337 }
bob_tpc 5:e77529f7ede3 338 break;
bob_tpc 3:e8cc286f9b2e 339
bob_tpc 5:e77529f7ede3 340 case 0xDD: // GPIO (LEDs and RFID-FE control)
bob_tpc 6:2941452a0e6d 341 //GPIO messages = 0xDD, r/w#, value, 0x7E, 0xXX, 0xXX - last two are fillers where CRC goes for RFID
bob_tpc 5:e77529f7ede3 342 for (i = 0; i < sizeof(cdc_buffer_rx); i++)
bob_tpc 5:e77529f7ede3 343 {
bob_tpc 5:e77529f7ede3 344 gpio_buffer[i] = cdc_buffer_rx[i]; // copy USB message to buffer for I2C
bob_tpc 5:e77529f7ede3 345 }
bob_tpc 3:e8cc286f9b2e 346
bob_tpc 6:2941452a0e6d 347 if (gpio_buffer[1] == 1) // GPIO read = 1
bob_tpc 5:e77529f7ede3 348 status = gpio_rd(); // read the requested data
bob_tpc 6:2941452a0e6d 349 else if (gpio_buffer[1] == 0) // GPIO write = 0
bob_tpc 6:2941452a0e6d 350 status = gpio_wr(); // send GPIO pin data
bob_tpc 5:e77529f7ede3 351
bob_tpc 5:e77529f7ede3 352 for (i = 0; i < sizeof(cdc_buffer_tx); i++)
bob_tpc 3:e8cc286f9b2e 353 {
bob_tpc 6:2941452a0e6d 354 cdc_buffer_tx[i] = gpio_buffer[i]; // copy GPIO response back to USB buffer
bob_tpc 3:e8cc286f9b2e 355 }
bob_tpc 5:e77529f7ede3 356
bob_tpc 5:e77529f7ede3 357 for (i = 0; i < sizeof(cdc_buffer_tx); i++)
bob_tpc 3:e8cc286f9b2e 358 {
bob_tpc 5:e77529f7ede3 359 cdc.putc(cdc_buffer_tx[i]); // send message back to PC
bob_tpc 5:e77529f7ede3 360
bob_tpc 5:e77529f7ede3 361 if (cdc_buffer_tx[i] == 0x7E) // check for rfid end mark in outbound message
bob_tpc 5:e77529f7ede3 362 {
bob_tpc 5:e77529f7ede3 363 crcCount = 2; // two more bytes for CRC
bob_tpc 5:e77529f7ede3 364 end_mark = TRUE; // end mark was reached
bob_tpc 5:e77529f7ede3 365 }
bob_tpc 5:e77529f7ede3 366 if (crcCount-- == 0) // end of message
bob_tpc 5:e77529f7ede3 367 {
bob_tpc 5:e77529f7ede3 368 if (end_mark == FALSE) return ERR_CDC_NO_TX_ENDMARK; // no end mark detected
bob_tpc 5:e77529f7ede3 369 break;
bob_tpc 5:e77529f7ede3 370 }
bob_tpc 3:e8cc286f9b2e 371 }
bob_tpc 5:e77529f7ede3 372 break;
bob_tpc 5:e77529f7ede3 373
bob_tpc 5:e77529f7ede3 374 case 0xEE: // Read/write EEPROM
bob_tpc 4:13e3e375c0d3 375 /*
bob_tpc 4:13e3e375c0d3 376 I2C-EEPROM messages = 0xEE, r/w, number of data bytes, block, address, data bytes, 0x7E, 0xXX, 0xXX - last two are fillers where CRC goes for RFID
bob_tpc 4:13e3e375c0d3 377
bob_tpc 4:13e3e375c0d3 378 Multiple registers can be read or written with single eeprom_msg_rd() or eeprom_msg_wr(). Location address increments for each byte.
bob_tpc 4:13e3e375c0d3 379 This practically the the same as the proximity calls, except the index/location is only one byte and the block select is part of the I2C address byte.
bob_tpc 4:13e3e375c0d3 380 */
bob_tpc 5:e77529f7ede3 381 for (i = 0; i < sizeof(cdc_buffer_rx); i++)
bob_tpc 5:e77529f7ede3 382 {
bob_tpc 5:e77529f7ede3 383 i2c_buffer[i] = cdc_buffer_rx[i]; // copy USB message to buffer for I2C
bob_tpc 5:e77529f7ede3 384 }
bob_tpc 4:13e3e375c0d3 385
bob_tpc 5:e77529f7ede3 386 if (i2c_buffer[1] == 1) // I2C read = 1
bob_tpc 5:e77529f7ede3 387 status = gpio_rd(); // read the gpio pins
bob_tpc 5:e77529f7ede3 388 else if (i2c_buffer[1] == 0) // I2C write = 0
bob_tpc 5:e77529f7ede3 389 status = gpio_wr(); // write gpio pins
bob_tpc 4:13e3e375c0d3 390
bob_tpc 5:e77529f7ede3 391 for (i = 0; i < sizeof(cdc_buffer_tx); i++)
bob_tpc 5:e77529f7ede3 392 {
bob_tpc 5:e77529f7ede3 393 cdc_buffer_tx[i] = i2c_buffer[i]; // copy prox response back to USB buffer
bob_tpc 5:e77529f7ede3 394 }
bob_tpc 4:13e3e375c0d3 395
bob_tpc 5:e77529f7ede3 396 for (i = 0; i < sizeof(cdc_buffer_tx); i++)
bob_tpc 4:13e3e375c0d3 397 {
bob_tpc 5:e77529f7ede3 398 cdc.putc(cdc_buffer_tx[i]); // send message back to PC
bob_tpc 5:e77529f7ede3 399
bob_tpc 5:e77529f7ede3 400 if (cdc_buffer_tx[i] == 0x7E) // check for rfid end mark in outbound message
bob_tpc 5:e77529f7ede3 401 {
bob_tpc 5:e77529f7ede3 402 crcCount = 2; // two more bytes for CRC
bob_tpc 5:e77529f7ede3 403 end_mark = TRUE; // end mark was reached
bob_tpc 5:e77529f7ede3 404 }
bob_tpc 5:e77529f7ede3 405 if (crcCount-- == 0) // end of message
bob_tpc 5:e77529f7ede3 406 {
bob_tpc 5:e77529f7ede3 407 if (end_mark == FALSE) return ERR_CDC_NO_TX_ENDMARK; // no end mark detected
bob_tpc 5:e77529f7ede3 408 break;
bob_tpc 5:e77529f7ede3 409 }
bob_tpc 5:e77529f7ede3 410 }
bob_tpc 5:e77529f7ede3 411 break;
bob_tpc 5:e77529f7ede3 412 default:
bob_tpc 5:e77529f7ede3 413 return ERR_CDC_BAD_CMD;
bob_tpc 5:e77529f7ede3 414 }
bob_tpc 0:8604e9cc07f2 415 }
bob_tpc 0:8604e9cc07f2 416 }