pyAVRdbg

An attempt of making a gdb rsp server for AVR debuggers with pymcuprog primarily for the new UPDI devices but other protocols supported by pymcuprog can easily be made to work.

Current Features

Stepping
Memory manipulation (viewing and modifying variables)
Hardware and software breakpoints
Reading Registers (including SREG, Stack pointer and program counter)*

*Writing is possible it is just not implemented yet.

Install/Dependencies

avr-gdb
- Recommend using the latest version. If you are compiling it I would looking at the arch community repos buildfile
- Windows users might want to use wsl
libusb might be required as a seperate install
pip3 install --user pymcuprog
- Some form for C++ compiler if you are running python versions higher than 3.6 since pymcuprog needs to compile package with Cython
  - Windows:
    - VC++ 2015.3 v14.00 (v140) installed through Visual Studio

Usage

Debugger server

Ensure debugger/kit is connected
Modify main.py with device name see supported devices and ip or port defines if applicable
start main.py

GDB

avr-gdb (wellNamed).elf
(gdb) target remote IP:Port

Currently Supported Devices

*Devices are untested but will most likely work.

Thanks

A huge thanks to Microchip for making pymcuprog available

Some useful links for referance for development

https://www.embecosm.com/appnotes/ean4/embecosm-howto-rsp-server-ean4-issue-2.html#id3033520
https://ftp.gnu.org/old-gnu/Manuals/gdb/html_node/gdb_toc.html
https://onlinedocs.microchip.com/pr/GUID-33422CDF-8B41-417C-9C31-E4521ADAE9B4-en-US-2/index.html
https://github.com/mbedmicro/pyOCD/tree/master/pyocd
https://developer.apple.com/library/archive/documentation/DeveloperTools/gdb/gdb/gdb_33.html
http://ww1.microchip.com/downloads/en/DeviceDoc/50002630A.pdf

PyAVRdbg

Install / Use

README