Proof o concept code made for a series of blog posts about mixing avrasm2 and avr-gcc code
The code pushed here were produced for a series os blog posts, demonstrating how it's possible do fully mix a Legacy Assembly AVR project (written with avrasm2) with a modern project (written with avr-gcc).
All Assembly code presented here belongs to a firmware written by RC911 for the KK2 flight controller board. His project was extremelly important for this research, as I could test all hypotesis with a real Legacy Assembly code, written with avrasm2.
To be able to build the experiments/hello-world-st7565 code, you will need to compile tools/elf-add-symbol.cpp with the following line:
g++ -ggdb -o elf-add-symbol elf-add-symbol.cpp -I elfio-3.1/
You need to be inside the tools folder, so make sure you cd into it before running g++.
Also to run this example, which demonstrates all interactions between C and Assembly, you will need a KK2 flight controller board. =D
To compile this example run the following command:
AVR_CHIP=atmega644p ../build-ihex.sh hello.asm
This will compile all Assembly and C codes, link them, extract the final .hex file and call avrdude to flash it into the chip memory.
The series os posts can be read here: https://daltonmatos.com/avr/