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Imbus 2024-03-23 21:27:59 +01:00
parent 2ed0c0a4ac
commit 241536a6e9
1 changed files with 3 additions and 66 deletions
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main.c
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@ -12,73 +12,10 @@
#define LED_PIN PB5 // Define the pin connected to the LED #define LED_PIN PB5 // Define the pin connected to the LED
#define TEMP_SENSOR_ADDR 0x48 #define TEMP_SENSOR_ADDR 0x48
#define TEMP_REG_ADDR 0x00 #define TEMP_REG_ADDR 0x00
#define BAUD 9600 // 9600 seems to be the highest the ATmega328P can handle in this config
void initI2C() { #include "MPU6050.h"
// Set the prescaler to 1 #include "i2c.h"
TWSR &= ~(1 << TWPS0); #include "uart.h"
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');
}
float readTemperature() { float readTemperature() {
uint16_t temperature; uint16_t temperature;