skenqbx/atmega

ATmega Libraries

• TWI - Hardware TWI/I2C [C++]
• USART - Hardware USART0/1 [C++]
• ADXL345 - 3-Axis Digital I2C Accelerometer [C++]
• ITG3200 - 3-Axis Digital I2C Gyroscope + Thermometer [C++]
• pimp - Miscellaneous Utilities [C]

Currently Supported MCUs

• ATmega2560

Example

// main.cpp
#include <TWI.h>
#include <USART.h>
#include <ADXL345.h>
#include <ITG3200.h>

extern "C" {
  #include <avr/delay.h>
  #include <pimp.h>
}

#define ADXL345_ADDRESS 0xA6
#define ITG3200_ADDRESS 0xD0


int main() {
  char buffer[10];    // a small buffer for `itoa()`
  const char newline = '\n';

  USART serial = USART::factory(
      USART_PORT0,
      USART_BAUDRATE_112K,
      USART_FRAME_8N1
  );
  TWI twi(TWI_CLOCK_400KHZ);
  ITG3200 itg3200(&twi, ITG3200_ADDRESS);
  ADXL345 adxl345(&twi, ADXL345_ADDRESS);

  serial.enable();
  twi.enable();
  itg3200.enable();
  adxl345.enable();

  serial.write(FF("Hello World!\n"));     // print a string stored in flash
  serial.write(itoa(mem_free(), buffer));

  for (;;) {
    itg3200.update();
    serial.write(itoa(itg3200.z * 1000, buffer));
    serial.write(newline);

    adxl345.update();
    serial.write(itoa(adxl345.z * 1000, buffer));
    serial.write(newline);

    serial.write(itoa(mem_free(), buffer));
    serial.write(newline);

    _delay_ms(100);
  }
}

Acknowledgements

The code has been developed using the incredible ATOM and PlatformIO, see setup for details.