AVR Toolchain

AVR development environment, configured using Vagrant. Includes:

• avr-gcc
• avrdude

USB ISP

Configured to use the USBTiny ISP. Update the Vagrantfile to support different ISPs.

Getting Started

1. Install VirtualBox with the extension pack (required for USB).
2. Create a directory avr_development at the same level as the avr_toolchain project. This is a shared directory for any code files.
3. vagrant up
4. vagrant ssh
5. Verify communication with USBtiny
6. Unplug/plug USBtiny
7. avrdude -c usbtiny -p m328p
8. Verify output is avrdude: initialization failed, rc=-1, which indicates communication with programmer.

Compiling with AVR GCC

Compile to hex:

// Compile
avr-gcc -g -Os -mmcu=atmega328p -c myfile.c

// Link
avr-gcc -g -mmcu=atmega328p -o myfile.elf myfile.o

// Load File
avr-objcopy -j .text -j .data -O ihex myfile.elf myfile.hex

Upload

avrdude -p m328p -c usbtiny -F -U flash:w:myfile.hex:i