168 lines
3 KiB
C
168 lines
3 KiB
C
#ifndef TIMER0_H
|
|
# define TIMER0_H
|
|
|
|
# include <avr/io.h>
|
|
# include "mystd.h"
|
|
|
|
# include "timer_global.h"
|
|
|
|
static inline void t0_init_ctc_2(e_timer_prescaler prescaler) {
|
|
// Fast PWM (8-bit): WGM22:0 = 0b011
|
|
TCCR0A = 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_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_overflow_interrupt(bool enable) {
|
|
if (enable)
|
|
TIMSK0 |= BV(TOIE0);
|
|
else
|
|
TIMSK0 &= ~BV(TOIE0);
|
|
}
|
|
|
|
static inline void t0_interrupt(enum e_timer_output output, bool enable) {
|
|
if (output & TO_A) {
|
|
if (enable)
|
|
TIMSK0 |= BV(OCIE0A);
|
|
else
|
|
TIMSK0 &= ~BV(OCIE0A);
|
|
}
|
|
if (output & TO_B) {
|
|
if (enable)
|
|
TIMSK0 |= BV(OCIE0B);
|
|
else
|
|
TIMSK0 &= ~BV(OCIE0B);
|
|
}
|
|
}
|
|
|
|
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);
|
|
*/
|