thinc5 / avrmake

Basic make file for use on linux (mabye even OSX) to build and flash files to AVR micros.

About

This is a basic make file to allow for the easy flashing of AVR Micros from Linux or OSX. Note: in our makefile and scripts we specify the device name as the atmega342pa even though we are using the atmega342a. This is because there is no entry for the atmega342a however they share the architeture and memory space which you can see for yourself in the manual.

The Makefile

Requirements

It requires the following:

• avr-gcc
• avr-libc
• avrdude
• make

Usage

1. (Not sure if required for OSX) Add your user to dialout - sudo usermod -a -G dialout username Note: you may need to relog for this to take effect.
2. Note: It is best to have a new directory for each project.
3. Place this file in the project directory.
4. Modify the Makefile to point to the desired directories.

• make will compile and link your program and attempt to flash to the avr.
• make build will only build the .hex.
• make flash will only erase the flash memeory and attempt to write the new hex, will not erase eeprom.
• make erase will erase all flash and eeprom memory.
• make clean will remove all object files and the output.hex.

This is currently set for the ATMEGA324A you will need to change both the -mmcu and the -p in avr-gcc and avrdude respectivly.

The extra scripts

To use the scripts remember to make them executable with chmod +x name_of_script.sh.

./connect_to_serial.sh

• requires gnu screen
• need to check the serial port in /dev/ (mine was /dev/ttyUSB0)

./recover_fuses_atmega324a.sh

• dont use this unless you are sure you have witten to some undesired fuses, I suggest using ATMEL studio to attempt to reset the fuses first