init mod03 ex03

module03/ex03/Makefile

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+include ../../Makefile

module03/ex03/bitmanip.h

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+#ifndef BITMANIP_H
+#define BITMANIP_H
+
+#include "utils.h"
+
+// Bit operations on registers
+#define SET(register, bit)		(register |= (1 << (bit)))
+#define CLEAR(register, bit)	(register &= ~(1 << (bit)))
+#define TEST(register, bit)		(register & (1 << (bit)))
+#define TOGGLE(register, bit)	(register ^= (1 << (bit)))
+
+// Get arguments from tuple-like definitions
+#define ARG_1(v1, v2)			v1
+#define ARG_2(v1, v2)			v2
+#define GET_PORT(args)			ARG_1 args
+#define GET_BIT(args)			ARG_2 args
+// // version with "LED1 B, D1" without parenthesis
+// #define ARG_1(v1, ...)			v1
+// #define ARG_2(v1, v2, ...)		v2
+// #define GET_PORT(...)			ARG_1(__VA_ARGS__)
+// #define GET_BIT(...)			ARG_2(__VA_ARGS__)
+
+// Actions on elements
+// #define SET_ELEM(...)			SET(CONCAT(PORT, GET_PORT(__VA_ARGS__)), GET_BIT(__VA_ARGS__)) // version for "LED1 B, D1" without parenthesis
+#define SET_ELEM(elem)			SET(CONCAT(PORT, GET_PORT(elem)), GET_BIT(elem))
+#define CLEAR_ELEM(elem)		CLEAR(CONCAT(PORT, GET_PORT(elem)), GET_BIT(elem))
+#define TEST_ELEM(elem)			TEST(CONCAT(PORT, GET_PORT(elem)), GET_BIT(elem))
+#define TOGGLE_ELEM(elem)		TOGGLE(CONCAT(PORT, GET_PORT(elem)), GET_BIT(elem))
+
+#define MODE_OUTPUT(elem)		SET(CONCAT(DDR, GET_PORT(elem)), GET_BIT(elem))
+#define MODE_INPUT(elem)		CLEAR(CONCAT(DDR, GET_PORT(elem)), GET_BIT(elem))
+#define TOGGLE_PIN(elem)		SET(CONCAT(PIN, GET_PORT(elem)), GET_BIT(elem))
+#define TEST_PIN(elem)			(TEST(CONCAT(PIN, GET_PORT(elem)), GET_BIT(elem)))
+#define IS_PIN_SET(elem)		(TEST_PIN(elem) == 0)
+#define IS_PIN_CLEAR(elem)		(TEST_PIN(elem) == 1)
+
+// Bit definitions
+#define D1 0
+#define D2 1
+#define D3 2
+#define D4 4
+#define SW1 2
+#define SW2 4
+#define D5B 3
+#define D5R 5
+#define D5G 6
+
+// Elements (port, bit)
+#define LED1		(B, D1)
+#define LED2		(B, D2)
+#define LED3		(B, D3)
+#define LED4		(B, D4)
+#define BUTTON1		(D, SW1)
+#define BUTTON2		(D, SW2)
+#define RGB5_BLUE	(D, D5B)
+#define RGB5_RED	(D, D5R)
+#define RGB5_GEEN	(D, D5G)
+
+#endif // BITMANIP_H

module03/ex03/main.c

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+#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
+    }
+}

module03/ex03/utils.h

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+#ifndef UTILS_H
+#define UTILS_H
+
+// stringify
+#define STRINGIFY_HELPER(x)			#x
+#define STRINGIFY(x)				STRINGIFY_HELPER(x)
+
+// concatenate
+#define CONCAT_HELPER(x, y)			x ## y
+#define CONCAT(x, y)				CONCAT_HELPER(x, y)
+
+// mathematics
+#define PERCENT(percent, total)		(((float)percent / 100) * total)
+#define DIV_ROUND_CLOSEST(n, d)		((((n) < 0) == ((d) < 0)) ? (((n) + (d)/2)/(d)) : (((n) - (d)/2)/(d)))
+
+// text
+#define SWITCH_CASE(ch) (((ch) >= 'A' && (ch) <= 'Z') || ((ch) >= 'a' && (ch) <= 'z') ? ((ch) ^ (1 << 5)) : (ch))
+
+// boolean
+#define TRUE						1
+#define FALSE						0
+
+#endif // UTILS_H