root / toolbox / rfid.c @ 1b054655
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| 1 | 12ea39cc | Tom Mullins | #include <string.h> |
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| 2 | 6ca98a3f | Tom Mullins | #include <stdint.h> |
| 3 | 9b2b6d91 | Tom Mullins | #include <util/delay.h> |
| 4 | #include "rfid.h" |
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| 5 | #include "serial.h" |
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| 6 | |||
| 7 | 6ca98a3f | Tom Mullins | static uint8_t read_cmd[] = {'!', 'R', 'W', 1, 32}; |
| 8 | 9b2b6d91 | Tom Mullins | |
| 9 | 532ba0bd | Tom Mullins | static int serno_idx; |
| 10 | 6ca98a3f | Tom Mullins | static uint8_t serno[RFID_SERNO_SIZE];
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| 11 | 9b2b6d91 | Tom Mullins | |
| 12 | static void zero_serno() { |
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| 13 | int i;
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| 14 | for (i = 0; i < RFID_SERNO_SIZE; i++) { |
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| 15 | serno[i] = 0;
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| 16 | } |
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| 17 | } |
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| 18 | |||
| 19 | void rfid_init() {
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| 20 | serial_init(); |
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| 21 | } |
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| 22 | |||
| 23 | 532ba0bd | Tom Mullins | void rfid_start_read() {
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| 24 | serno_idx = -1;
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| 25 | serial_flush(); |
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| 26 | serial_write(read_cmd, sizeof(read_cmd));
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| 27 | } |
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| 28 | |||
| 29 | char rfid_poll() {
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| 30 | int c;
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| 31 | |||
| 32 | 6ca98a3f | Tom Mullins | while ((c = serial_read()) >= 0) { |
| 33 | 532ba0bd | Tom Mullins | |
| 34 | if (serno_idx < 0) { |
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| 35 | if (c != RFID_OK) {
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| 36 | zero_serno(); |
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| 37 | return 1; |
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| 38 | } |
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| 39 | } else {
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| 40 | serno[serno_idx] = c; |
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| 41 | } |
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| 42 | |||
| 43 | serno_idx++; |
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| 44 | if (serno_idx >= RFID_SERNO_SIZE) {
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| 45 | return 1; |
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| 46 | 9b2b6d91 | Tom Mullins | } |
| 47 | 532ba0bd | Tom Mullins | |
| 48 | 9b2b6d91 | Tom Mullins | } |
| 49 | 532ba0bd | Tom Mullins | |
| 50 | return 0; |
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| 51 | 9b2b6d91 | Tom Mullins | } |
| 52 | |||
| 53 | 6ca98a3f | Tom Mullins | void rfid_get_serno(uint8_t *buf) {
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| 54 | 12ea39cc | Tom Mullins | memcpy(buf, serno, sizeof(serno));
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| 55 | } |