#include <avr/io.h>
#include <avr/interrupt.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include "nrf24l01.h"
#include "lis3dh.h"
#include "usart.h"

void setup_timer(void);
nRF24L01 *setup_rf(void);
lis3dhacceleration calcAcceleration();

volatile bool rf_interrupt = false;
volatile bool send_message = false;
char* tempTemplate = "TX: Values to send: x=%4.2f m/s^2 y=%4.2f m/s^2 z=%4.2f m/s^2\n";

int main(void)
{
lis3dhacceleration acceleration;
uint8_t to_address[5] = { 0x01, 0x01, 0x01, 0x01, 0x01 };

char printBuffer[64];

nRF24L01 *rf = setup_rf();
setup_timer();
usart_init();
i2c_init();

/* Is there a LIS3DH? */
uint8_t deviceid=0;
lis3dh_read_bytes(WHO_AM_I, 1, &deviceid);
if (deviceid != 0x33)
{
USARTSendStr("No LIS3DH detected!\n");
return -1;
}
else
USARTSendStr("LIS3DH is available\n");

setup_lis3dh();

sei();
while (1)
{
if (rf_interrupt) {
rf_interrupt = false;
int success = nRF24L01_transmit_success(rf);
if (success != 0)
{
nRF24L01_flush_transmit_message(rf);
}
}

if (send_message) {
send_message = false;

acceleration = calcAcceleration();
sprintf(printBuffer, tempTemplate, acceleration.x_g, acceleration.y_g, acceleration.z_g);
USARTSendStr(printBuffer);

Project: Accelerometer (LIS3DH) Task: The goal of this project is...