AVR-Playground/main.c

/*
 * This code utilizes the AVR libraries for I2C and UART communication.
 * Make sure to connect the SDA and SCL pins of the ATmega328P to the
 * corresponding pins of your I2C temperature sensor. Additionally, you might
 * need pull-up resistors for the I2C lines.
 */

#include <avr/io.h>
#include <util/delay.h>
#include <math.h>

#define LED_PIN PB5  // Define the pin connected to the LED
#define TEMP_SENSOR_ADDR 0x48
#define TEMP_REG_ADDR 0x00

#include "MPU6050.h"
#include "i2c.h"
#include "uart.h"

float readTemperature() {
    uint16_t temperature;

    // Send start condition
    I2C_start();
    // Send device address with write operation
    I2C_write((TEMP_SENSOR_ADDR << 1) | 0);
    // Send temperature register address
    I2C_write(0x00);
    // Repeat start
    I2C_start();
    // Send device address with read operation
    I2C_write((TEMP_SENSOR_ADDR << 1) | 1);
    // Read temperature data MSB
    temperature = (uint16_t)(I2C_read(1)) << 8;
    // Read temperature data LSB
    temperature |= I2C_read(0);
    // Send stop condition
    I2C_stop();

    // Convert raw data to temperature in Celsius
    return (float)temperature * 0.0625;
}

void blink() {
    // Set the LED pin as output
    DDRB |= (1 << LED_PIN);

    while (1) {
        // Turn on the LED by setting the pin high
        PORTB |= (1 << LED_PIN);
        // Delay for 500 milliseconds
        _delay_ms(500);

        // Turn off the LED by setting the pin low
        PORTB &= ~(1 << LED_PIN);
        // Delay for 500 milliseconds
        _delay_ms(500);
    }
}

int main(void) {
    // initI2C();
    initUART();

    while(1) {
        UART_println("Hello, World!");
        _delay_ms(1000);
    }


    // float temperature;

    // while (1) {
    //     temperature = readTemperature();
    //     // Print temperature over UART
    //     UART_println("Temperature: ");
    //     UART_transmit((uint8_t)(temperature / 10.0) + '0');
    //     UART_transmit((uint8_t)fmod(temperature, 10.0) + '0');
    //     UART_println(" °C");
    //     _delay_ms(1000);  // Delay for 1 second
    // }

    // return 0;
}