m8c port rg35xx

Introduction

This is the port of the m8c project for rg35xx. Graphics interaction has been rewritten to use SDL1.2 calls, SDL_gfx (stock, Garlic OS does not support SDL2). The code for joystick interaction has been removed, j2k.so is used for input translation. The code for interacting with libserialport has been removed (stock, Garlic OS does not include the snd_usb_audio kernel module). All interaction occurs through libusb, M8 command reception has been rewritten to be asynchronous because synchronous calls caused audio glitches.

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Building

# Clone toolchain
git clone git@github.com:edemirkan/rg35xx-toolchain.git toolchain
cd toolchain

# Clone project with deps
mkdir workspace
git clone git@github.com:thirdegg/m8c-rg35xx workspace/m8c-rg35xx
git clone git@github.com:ferzkopp/SDL_gfx.git workspace/m8c-rg35xx/deps/SDL_gfx
git clone git@github.com:libusb/libusb.git workspace/m8c-rg35xx/deps/libusb

# Run container with toolchain
make shell

# Build SDL_gfx
cd m8c-rg35xx/deps/SDL_gfx
./configure --host=arm-linux --enable-mmx=no --enable-shared=no
make
cd -

# Build libusb
cd m8c-rg35xx/deps/libusb
apt install -y libtool
./autogen.sh --host arm-linux --enable-udev=no --enable-shared=no
make
cd -

# Build project
make
exit

Running

1. Create a folder named m8c/ on the flash drive in Roms/APPS/.
2. Copy the executable file m8c from the toolchain/workspace/m8c-rg35xx folder into it.
3. Create a file m8c.sh in the Roms/APPS/ folder with the following contents:

#!/bin/sh
PROG_DIR=$(dirname "$0")/m8c
cd ${PROG_DIR}
HOME=${PROG_DIR}
LD_PRELOAD=./j2k.so ./m8c &>log.txt
sync

4. Somewhere, find a j2k.so file compatible with the system and move it to APPS/m8c/. I used one from the compiled LittleGP Tracker project (I couldn't find links to the project for building j2k.so).
5. Insert the flash drive into the console, connect it via an OTG controller with M8.
6. Enjoy!

Disclaimer

THE CODE MAY HAVE MEMORY LEAKS! Most of the code was written in haste, and debugging takes an unreasonably long time. Use at your own risk and I will be glad to receive your merge requests with fixes.