maehw / arduino-mega2560-bare-metal-uart

Little bare-metal example to blinks built-in LED and demo use of UART on an Arduino MEGA2560 board

Usage

This example blinks the built-in LED (Arduino pin 13) connected to an Arduino MEGA2560 (which is based on an ATmega2560 MCU). Additionally, it also sends "hello\n" and "world\n" messages via UART0. These serial messages can received on the PC-side via the USB CDC thanks to the additional ATmega 16U2 on the Arduino board.

This code is not using the Arduino IDE and libraries, but the gcc-avr toolchain, avr-libc libraries, a pretty bare-metal C program and avrdude to flash it to the target.

• make: to compile and link main.c

• make program: to flash the program with avrdude

Dependencies

• Installation of gcc-avr
• Installation of avr-libc
• Installation of avrdude
• Installation of make