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works but color is wrong

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hugo LAMY
2025-03-10 15:16:39 +01:00
parent 048db02593
commit c3357fcfaa
6 changed files with 260 additions and 90 deletions
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89
module03/ex03/main.c
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@@ -1,94 +1,11 @@
#include <avr/io.h>
#include <util/delay.h>
#include <avr/interrupt.h>
#include "header.h"
#include "utils.h"
#include "bitmanip.h"
// prototypes
void init_rgb();
void set_rgb(uint8_t r, uint8_t g, uint8_t b);
uint8_t get_red(char *input);
uint8_t get_green(char *input);
uint8_t get_blue(char *input);
uint8_t hex_to_int(char c);
// 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)
}
// convert hex to int : https://stackoverflow.com/a/39052987
uint8_t hex_to_int(char c) {
if (c >= '0' && c <= '9') {
return c - '0';
}
if (c >= 'A' && c <= 'F') {
return c - 'A' + 10;
}
if (c >= 'a' && c <= 'f') {
return c - 'a' + 10;
}
return 0;
}
// "<< 4" is equivalent to "* 16"
uint8_t get_red(char *input) {
if (input[0] == '#') {
return (hex_to_int(input[1]) << 4) + hex_to_int(input[2]);
}
return 0;
}
uint8_t get_green(char *input) {
if (input[0] == '#') {
return (hex_to_int(input[3]) << 4) + hex_to_int(input[4]);
}
return 0;
}
uint8_t get_blue(char *input) {
if (input[0] == '#') {
return (hex_to_int(input[5]) << 4) + hex_to_int(input[6]);
}
return 0;
}
// led RGB D5 must turns on in a loop of colors using PWM
int main() {
init_rgb();
uart_init();
char *input = "#FFFF00";
uint8_t r = get_red(input);
uint8_t g = get_green(input);
uint8_t b = get_blue(input);
set_rgb(r, g, b);
while (1);
}