70 lines
2.1 KiB
C
70 lines
2.1 KiB
C
#include <avr/io.h>
|
|
#include <util/delay.h>
|
|
#include <avr/interrupt.h>
|
|
|
|
#include "utils.h"
|
|
#include "bitmanip.h"
|
|
|
|
void init_rgb();
|
|
|
|
void set_rgb(uint8_t r, uint8_t g, uint8_t b);
|
|
|
|
void wheel(uint8_t pos) {
|
|
pos = 255 - pos;
|
|
if (pos < 85) {
|
|
set_rgb(255 - pos * 3, 0, pos * 3);
|
|
} else if (pos < 170) {
|
|
pos = pos - 85;
|
|
set_rgb(0, pos * 3, 255 - pos * 3);
|
|
} else {
|
|
pos = pos - 170;
|
|
set_rgb(pos * 3, 255 - pos * 3, 0);
|
|
}
|
|
}
|
|
|
|
// Table 14-9 : Port D Pins Alternate Functions
|
|
// OC2B (PD3) : Red
|
|
// OC0B (PD5) : Green
|
|
// OC0A (PD6) : Blue
|
|
void init_rgb() {
|
|
MODE_OUTPUT(RGB5_RED);
|
|
MODE_OUTPUT(RGB5_GEEN);
|
|
MODE_OUTPUT(RGB5_BLUE);
|
|
|
|
TCCR0A = 0; // 15.9.1 : Clear Timer0 control register A
|
|
TCCR0B = 0; // 15.9.2 : Clear Timer0 control register B
|
|
TCCR2A = 0; // Clear Timer2 control register A
|
|
|
|
TCCR0A |= (1 << WGM00) | (1 << WGM01); // Table 15-8 : Timer0 in Fast PWM mode
|
|
TCCR2A |= (1 << WGM20) | (1 << WGM21); // Table 18-8 : Timer2 in Fast PWM mode
|
|
|
|
TCCR0A |= (1 << COM0A1); // Table 15-3 : BLUE - Timer0 Non-inverting mode for Blue (OC0A -> PD6)
|
|
TCCR0A |= (1 << COM0B1); // Table 15-6 : GREEN - Timer0 Non-inverting mode for Green (OC0B -> PD5)
|
|
TCCR2A |= (1 << COM2B1); // Table 18-6 : RED - Timer2 Non-inverting mode for Red (OC2B -> PD3)
|
|
|
|
TCCR0B |= (1 << CS01); // Table 15-9 : Prescaler 8 → ~8kHz PWM frequency
|
|
TCCR2B |= (1 << CS21); // Table 18-9 : Prescaler 8 → ~8kHz PWM frequency
|
|
|
|
OCR0A = 0; // Blue OFF
|
|
OCR0B = 0; // Green OFF
|
|
OCR2B = 0; // Red OFF
|
|
}
|
|
|
|
void set_rgb(uint8_t r, uint8_t g, uint8_t b) {
|
|
OCR2B = r; // Red (PD3, Timer2 OCR2B)
|
|
OCR0B = g; // Green (PD5, Timer0 OCR0B)
|
|
OCR0A = b; // Blue (PD6, Timer0 OCR0A)
|
|
}
|
|
|
|
// led RGB D5 must turns on in a loop of colors using PWM
|
|
int main() {
|
|
init_rgb();
|
|
|
|
uint8_t pos = 0;
|
|
while (1) {
|
|
wheel(pos); // Set color based on wheel position
|
|
_delay_ms(10); // Small delay for smooth transition
|
|
pos++; // Increment color position
|
|
}
|
|
}
|