Revision 5f7a1707
Debugging BOM
| scout_avr/bom/bom.c | ||
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#include <stdint.h> |
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#include <avr/io.h> |
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#include <avr/interrupt.h> |
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#include <util/delay.h> |
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#include "tiny-twi.h" |
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#include "bomi2c.h" |
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|
| ... | ... | |
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#endif |
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|
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static void bom_init(void) {
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SET_BIT(DDRB, EMIT); |
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|
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init_detect(); |
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init_timer1(); |
| ... | ... | |
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static void init_detect(void) {
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TCCR0A |= _BV(WGM01); // enable reset on compare A |
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TIMSK |= _BV(OCIE0A); // enable timer0 compare match A |
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OCR0A = TIME_US(1000); // trigger every 1ms |
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GIFR |= _BV(PCIF); // Clear any previous detections |
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GIMSK |= _BV(PCIE); // Enable pin change interrupt for detection |
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PCMSK |= _BV(PCINT_DETECT); // Enable interrupt on detect pin |
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} |
| ... | ... | |
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data = 0; |
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count = 0; |
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last_bit = 1; |
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_delay_us(160); |
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start_timer0(); |
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} |
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|
| ... | ... | |
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ISR(TIMER0_COMPA_vect) {
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char this_bit = READ_BIT(PINB, DETECT); |
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smb_send_data((uint8_t*)&this_bit, 1); |
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if (this_bit == 0) {
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if (last_bit == 0) {
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if (this_bit == 1) {
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if (last_bit == 1) {
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restart_detect(); |
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} |
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} else {
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data = data << 1 | (~last_bit & 1);
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data = data << 1 | (last_bit & 1); |
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count++; |
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} |
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|
| scout_avr/bom/tiny-twi.c | ||
|---|---|---|
| 81 | 81 |
static void twi_send_data() {
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twi_set_ctr(0); |
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if (send_queue.start == send_queue.end && !send_queue.full) {
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USIDR = 0; |
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USIDR = 0xFF;
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} else {
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USIDR = send_queue.data[send_queue.start++]; |
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if (send_queue.start == SEND_BUF_SIZE) |
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