Includes in main

main.c

@@ -12,73 +12,10 @@
 #define LED_PIN PB5  // Define the pin connected to the LED
 #define TEMP_SENSOR_ADDR 0x48
 #define TEMP_REG_ADDR 0x00
-#define BAUD 9600  // 9600 seems to be the highest the ATmega328P can handle in this config
 
-void initI2C() {
-    // Set the prescaler to 1
-    TWSR &= ~(1 << TWPS0);
-    TWSR &= ~(1 << TWPS1);
-    // Set the bit rate to 100kHz
-    TWBR = ((F_CPU / 100000) - 16) / 2;
-}
-
-void I2C_start() {
-    // Send the start condition
-    TWCR = (1 << TWINT) | (1 << TWSTA) | (1 << TWEN);
-    // Wait for the start condition to be sent
-    while (!(TWCR & (1 << TWINT)))
-        ;
-}
-
-void I2C_stop() {
-    // Send the stop condition
-    TWCR = (1 << TWINT) | (1 << TWSTO) | (1 << TWEN);
-    // Wait for the stop condition to be sent
-    while (TWCR & (1 << TWSTO));
-}
-
-void I2C_write(uint8_t data) {
-    // Load the data into the data register
-    TWDR = data;
-    // Start transmission of data
-    TWCR = (1 << TWINT) | (1 << TWEN);
-    // Wait for the data to be sent
-    while (!(TWCR & (1 << TWINT)));
-}
-
-uint8_t I2C_read(uint8_t ack) {
-    // Enable TWI, generate ACK (if ack = 1) and clear TWI interrupt flag
-    TWCR = (1 << TWINT) | (1 << TWEN) | (ack << TWEA);
-    // Wait until TWI finish its current job (read operation)
-    while (!(TWCR & (1 << TWINT)));
-    // Return received data
-    return TWDR;
-}
-
-void initUART() {
-    // Set baud rate
-    UBRR0H = (uint8_t)(F_CPU / (BAUD * 16UL) - 1) >> 8;
-    UBRR0L = (uint8_t)(F_CPU / (BAUD * 16UL) - 1);
-    // Enable receiver and transmitter
-    UCSR0B |= (1 << RXEN0) | (1 << TXEN0);
-    // Set frame format: 8 data, 1 stop bit
-    UCSR0C |= (1 << UCSZ01) | (1 << UCSZ00);
-}
-
-void UART_transmit(uint8_t data) {
-    // Wait for empty transmit buffer
-    while (!(UCSR0A & (1 << UDRE0)));
-    // Put data into buffer, sends the data
-    UDR0 = data;
-}
-
-void UART_println(const char *str) {
-    // Transmit each character until NULL character is encountered
-    while (*str) UART_transmit(*str++);
-    // Transmit carriage return and line feed characters
-    UART_transmit('\r');
-    UART_transmit('\n');
-}
+#include "MPU6050.h"
+#include "i2c.h"
+#include "uart.h"
 
 float readTemperature() {
     uint16_t temperature;

makefile

@@ -14,27 +14,30 @@ CFLAGS = -std=c2x -Wall -Wno-array-bounds -mmcu=$(MCU) -DF_CPU=16000000UL -O3
 # Source files
 SRCS = $(wildcard *.c)
 
+# Object files directory
+OBJDIR = build
+
 # Object files
-OBJS = $(SRCS:.c=.o)
+OBJS = $(addprefix $(OBJDIR)/,$(SRCS:.c=.o))
 
 # Target file
 TARGET = main
 
 # Default target
-all: $(TARGET).hex
+all: $(OBJDIR) $(TARGET).hex
 
 # Compile C files
-%.o: %.c
+$(OBJDIR)/%.o: %.c | $(OBJDIR)
 	$(CC) $(CFLAGS) -c $< -o $@
 
 # Link object files
-$(TARGET).elf: $(OBJS)
-	$(CC) $(CFLAGS) $(OBJS) -o $(TARGET).elf
-	avr-strip $(TARGET).elf
+$(OBJDIR)/$(TARGET).elf: $(OBJS)
+	$(CC) $(CFLAGS) $(OBJS) -o $(OBJDIR)/$(TARGET).elf
+	avr-strip $(OBJDIR)/$(TARGET).elf
 
 # Convert ELF to HEX
-$(TARGET).hex: $(TARGET).elf
-	avr-objcopy -O ihex -R .eeprom $(TARGET).elf $(TARGET).hex
+$(TARGET).hex: $(OBJDIR)/$(TARGET).elf
+	avr-objcopy -O ihex -R .eeprom $(OBJDIR)/$(TARGET).elf $(TARGET).hex
 
 # Flash the program
 flash: $(TARGET).hex
@@ -42,18 +45,22 @@ flash: $(TARGET).hex
 
 # Run the program in QEMU
 qemu: $(TARGET).elf
-	qemu-system-avr -machine $(QEMU_MACHINE_NAME) -bios $(TARGET).elf
+	qemu-system-avr -machine $(QEMU_MACHINE_NAME) -bios $(OBJDIR)/$(TARGET).elf
 
 # View the generated assembly
 asm: $(TARGET).hex
-	avr-objdump -S $(TARGET).elf
+	avr-objdump -S $(OBJDIR)/$(TARGET).elf
 
 serial:
 	picocom -b 9600 /dev/ttyUSB0
 
+# Create build directory
+$(OBJDIR):
+	mkdir -p $(OBJDIR)
+
 # Clean
 clean:
-	rm -f $(OBJS) $(TARGET).elf $(TARGET).hex
+	rm -rf $(OBJDIR) $(TARGET).hex
 
-size: main.hex
-	avr-size --mcu=atmega328p main.hex
+size: $(TARGET).hex
+	avr-size --mcu=atmega328p $(TARGET).hex