+++ /dev/null
-#include <avr/io.h>
-#include <avr/eeprom.h>
-#include <util/delay.h>
-#include <avr/sleep.h>
-#include <avr/interrupt.h>
-
-volatile uint16_t adcval;
-unsigned char led_is_on = 0;
-volatile unsigned char adccount = 0;
-
-typedef struct {
- unsigned char pwmval, expected;
-} led_level_t;
-
-led_level_t led_modes[2] = {
- { 0x50, 0x38 },
- { 0x38, 0x04 },
-};
-
-unsigned char led_mode = 0;
-unsigned char led_mode_changed = 0;
-
-static void inline led_on()
-{
- DDRB |= _BV( PB5 );
- PORTA |= _BV( PA0 );
- led_is_on = 1;
-}
-
-static void inline led_off()
-{
- led_is_on = 0;
- DDRB &= ~_BV( PB5 );
- PORTA &=~ _BV( PA0 );
-// ADCSRA &= ~(_BV(ADIE) | _BV(ADIF));
-}
-
-/* ------------ Logging/Debugging ----------- */
-
-unsigned char debug_state EEMEM;
-
-static void inline debug_setstate(unsigned char val)
-{
- eeprom_write_byte(&debug_state, val);
-}
-
-#define LOG_BUFFER 64
-uint16_t log_buffer[LOG_BUFFER] EEMEM;
-unsigned char log_buffer_count;
-uint16_t log_buffer2[LOG_BUFFER];
-volatile unsigned char stop = 0;
-
-static void inline init_log()
-{
- debug_setstate(1);
- log_buffer_count = 0;
-}
-
-static void log_word(uint16_t word) {
- if (log_buffer_count >= LOG_BUFFER)
- return;
-
- // eeprom_write_word(&log_buffer[log_buffer_count], word);
- log_buffer2[log_buffer_count] = word;
- log_buffer_count++;
-
- if (log_buffer_count == LOG_BUFFER) {
- unsigned char i;
- for (i=0; i < LOG_BUFFER; i++) {
- eeprom_write_word(&log_buffer[i],
- log_buffer2[i]);
- }
- debug_setstate(0x42);
- }
-}
-
-/* ------------ Timer ----------- */
-
-volatile uint16_t jiffies = 0;
-
-static void inline init_tmr()
-{
- TCCR0A = _BV(WGM00);
- TCCR0B = _BV(CS02) | _BV(CS00); // 1 kHz
- OCR0A = 12; // 100 Hz
- TIMSK |= _BV(OCIE0A);
- DDRA |= _BV( PA0 );
-
- jiffies = 0;
-}
-
-static void inline tmr_handler()
-{
- unsigned char c = jiffies & 0x0F;
- unsigned char c1 = jiffies & 0x7F;
-
- ++jiffies;
-
-#if 0
- if (c == 1)
- led_on();
-
- if (c == 9)
- led_off();
-#endif
-
- if (c == 0x02 || c == 0x08)
- led_on();
-
- if (c == 0x05 || c == 0x0b)
- led_off();
-
-#if 1
- if (c1 == 0x10) {
- led_mode = 0;
- led_mode_changed = 1;
- OCR1D = led_modes[led_mode].pwmval;
- } else if (c1 == 0x70) {
- led_mode = 1;
- led_mode_changed = 1;
- OCR1D = led_modes[led_mode].pwmval;
- }
-#endif
-
- ADCSRA |= _BV(ADSC);
-#if 0
- if (led_is_on && adcval != 0xFFEE) {
- adcval = 0xFFEE;
-
- ADCSRA |= _BV(ADIF) | _BV(ADIE) | _BV(ADSC);
- }
-#endif
-}
-
-ISR(TIMER0_COMPA_vect)
-{
- tmr_handler();
-}
-
-/* ------------ PWM ----------- */
-
-static void inline init_pwm()
-{
- /* Async clock */
- PLLCSR = _BV(LSM) | _BV(PLLE);
- _delay_ms(1);
- while (PLLCSR & _BV(PLOCK) == 0)
- ;
- PLLCSR |= _BV(PCKE);
-
- TCCR1C = _BV(COM1D0) | _BV(COM1D1) | _BV(PWM1D);
- TCCR1A = _BV(COM1A0) | _BV(COM1A1) | _BV(COM1B0) | _BV(COM1B1) | _BV(PWM1A) | _BV(PWM1B);
- // TCCR1B = 0x80| _BV(CS13) | _BV(CS11);
- TCCR1B = _BV(7) // PWM1X: PWM inversion mode
- | _BV(CS10) // no clock prescaling
- ;
- OCR1C = 0xFF; // TOP value
- OCR1D = OCR1B = OCR1A = 0;
- // OCR1D = 0;
- DDRB |= _BV( PB5 );
- PORTB &= ~(_BV( PB5 ) | _BV( PB1 ) | _BV( PB3 ));
-
- // led_off();
- // TIMSK |= _BV(TOIE1);
-}
-
-#if 0
-static void inline pwm_handler()
-{
- // TIMSK &= ~_BV(TOIE1);
- // OCR1D = pwmval;
-}
-
-ISR(TIMER1_OVF_vect)
-{
- pwm_handler();
-}
-#endif
-
-/* ------------ A/D Converter ----------- */
-
-static void inline init_adc()
-{
- ADCSRA = _BV(ADEN) // enable
- | _BV(ADPS1) | _BV(ADPS0) // CLK/8 = 125 kHz
- // | _BV(ADPS2) // CLK/16 = 62.5 kHz
- ;
- ADMUX = _BV(REFS1) // 1.1V internal reference
- | _BV(MUX4)|_BV(MUX3) // port ADC5-6, gain 1
- ;
- // ADCSRB = _BV(REFS2);
- ADCSRB |= _BV(GSEL);
- // Disable digital input on all bits used by ADC
- DIDR0 = _BV(ADC5D)|_BV(ADC6D) | _BV(AREFD);
- ADCSRA |= _BV(ADIE);
-}
-
-static void inline adc_handler()
-{
- uint16_t new_pwm = led_modes[led_mode].pwmval;
- uint16_t old_pwm = new_pwm;
- uint16_t adc_exp = led_modes[led_mode].expected;
-
- adcval = ADCW;
- adccount++;
-
- // log_word(((adcval & 0x3FC) << 6) | pwmval);
-
- if (!led_is_on)
- return;
-
- // ADCSRA &= ~(_BV(ADIE) | _BV(ADIF));
-
- if (led_mode_changed) {
- led_mode_changed = 0;
- goto set_pwm;
- }
-
- log_word(((adcval & 0xFF) << 8) | old_pwm);
-
- if (2*adcval > 5*adc_exp) { // >2.5x expected, lower significantly
- new_pwm = 2*old_pwm/3;
- } else if (3*adcval > 4*adc_exp) { // >1.33x expected, lower a bit
- new_pwm = old_pwm - 1;
- } else if (4*adcval < 3*adc_exp) { // 0.75x expected, raise a bit
- new_pwm = old_pwm + 1;
- }
-
- if (new_pwm > 0x60) { // odpojeno?
- new_pwm = 0x60;
- }
- if (new_pwm < 2) { // zkrat?
- new_pwm = 2;
- }
-
-set_pwm:
- if (new_pwm != old_pwm) {
- led_modes[led_mode].pwmval = new_pwm;
- OCR1D = new_pwm;
- }
- // ADCSRA |= _BV(ADSC);
-}
-
-ISR(ADC_vect)
-{
- adc_handler();
-}
-
-int main(void)
-{
- _delay_ms(1500);
- init_log();
-
- init_pwm();
- init_adc();
- init_tmr();
-
- led_on();
- debug_setstate(3);
-
- sei();
- while (1)
- ; // sleep_mode();
-
-#if 0
- while (1) {
- PORTA |= _BV( PA0 );
- _delay_ms(200);
- PORTA &=~ _BV( PA0 );
- _delay_ms(200);
- }
-#endif
-}
https://www.fi.muni.cz/~kas/git / bike-lights.git / blobdiff