113 lines
2 KiB
C
113 lines
2 KiB
C
|
#ifndef TIMER0_H
|
||
|
|
# define TIMER0_H
|
||
|
|
|
||
|
|
# include <avr/io.h>
|
||
|
|
# include "mystd.h"
|
||
|
|
|
||
|
|
# include "timer_global.h"
|
||
|
|
|
||
|
|
static inline void t0_init_fpwm_3(e_timer_prescaler prescaler) {
|
||
|
|
// Fast PWM (8-bit): WGM22:0 = 0b011
|
||
|
|
TCCR0A = _BV(WGM00) | _BV(WGM01);
|
||
|
|
|
||
|
|
// reset to zero -> timer off
|
||
|
|
TCCR0B &= ~(_BV(CS02) | _BV(CS01) | _BV(CS00));
|
||
|
|
// set the correct prescaler
|
||
|
|
switch (prescaler) {
|
||
|
|
case (PRESCALER_1): {
|
||
|
|
TCCR0B |= (_BV(CS00));
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
case (PRESCALER_8): {
|
||
|
|
TCCR0B |= (_BV(CS01));
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
case (PRESCALER_64): {
|
||
|
|
TCCR0B |= (_BV(CS01) | _BV(CS00));
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
case (PRESCALER_256): {
|
||
|
|
TCCR0B |= (_BV(CS02));
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
case (PRESCALER_1024): {
|
||
|
|
TCCR0B |= (_BV(CS02) | _BV(CS00));
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
case (PRESCALER_OFF): {
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void t0_set_ocr(enum e_timer_output output, uint8_t value) {
|
||
|
|
if (output & TO_A)
|
||
|
|
OCR0A = value;
|
||
|
|
if (output & TO_B)
|
||
|
|
OCR0B = value;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void t0_set_out_mode(enum e_timer_output output, enum e_timer_output_mode mode) {
|
||
|
|
if (output & TO_A) {
|
||
|
|
TCCR0A &= ~(_BV(COM0A1) | _BV(COM0A0));
|
||
|
|
switch (mode) {
|
||
|
|
case (TOM_00): {
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
case (TOM_10): {
|
||
|
|
TCCR0A |= (_BV(COM0A1));
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
case (TOM_01): {
|
||
|
|
TCCR0A |= (_BV(COM0A0));
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
case (TOM_11): {
|
||
|
|
TCCR0A |= (_BV(COM0A1) | _BV(COM0A0));
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (output & TO_B) {
|
||
|
|
TCCR0A &= ~(_BV(COM0B1) | _BV(COM0B0));
|
||
|
|
switch (mode) {
|
||
|
|
case (TOM_00): {
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
case (TOM_10): {
|
||
|
|
TCCR0A |= (_BV(COM0B1));
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
case (TOM_01): {
|
||
|
|
TCCR0A |= (_BV(COM0B0));
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
case (TOM_11): {
|
||
|
|
TCCR0A |= (_BV(COM0B1) | _BV(COM0B0));
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// OC2B => RED => PD3
|
||
|
|
// OC0B => GREEN => PD5
|
||
|
|
// OC0A => BLUE => PD6
|
||
|
|
|
||
|
|
#endif /* TIMER0_H */
|
||
|
|
|
||
|
|
/*
|
||
|
|
// OC2B = PD3 → output
|
||
|
|
DDRD |= _BV(DDD3) | _BV(DDD5) | _BV(DDD6);
|
||
|
|
|
||
|
|
// Fast PWM (8-bit): WGM22:0 = 0b011
|
||
|
|
TCCR0A = _BV(WGM00) | _BV(WGM01);
|
||
|
|
TCCR0A |= _BV(COM0B1);
|
||
|
|
|
||
|
|
// 50% duty cycle
|
||
|
|
OCR0B = 128;
|
||
|
|
|
||
|
|
// Start timer, prescaler = 64
|
||
|
|
TCCR0B = _BV(CS02);
|
||
|
|
*/
|