pijoy

Sega megadrive gamepad driver for raspberry pi gpio

1. Get running kernel sources

• find pi firmware git hash:

zcat /usr/share/doc/raspberrypi-bootloader/changelog.Debian.gz | head

• find pi kernel sources git hash:

firmware/extra/git_hash

• get pi kernel sources
• setup KERNEL_SRC environment variable:

export KERNEL_SRC={path-to-kernel-sources}

• get Module.symvers from firmware repo:

cp firmware/extra/Module.symvers ${KERNEL_SRC}

2. Get running kernel config

• ensure configs module running:

modprobe configs

• get running kernel config:

zcat /proc/config.gz > ${KERNEL_SRC}/.config

3. Setup compiler tools

• setup CCPREFIX environment variable:

export CCPREFIX=/{tools-path}/arm-bcm2708/{compiler-path}/bin/arm-linux-gnueabihf-

• prepare kernel sources:

make ARCH=arm CROSS_COMPILE=${CCPREFIX} oldconfig
make ARCH=arm CROSS_COMPILE=${CCPREFIX} modules_prepare

4. Build module

• run make within pijoy module directory:

make ARCH=arm CROSS_COMPILE=${CCPREFIX} -C ${KERNEL_SRC} M=$(pwd)

5. Upload and run compiled module

• upload module to pi:

scp pijoy.ko pi@raspberry:/home/pi/

• install module on pi:

mv /home/pi/pijoy.ko /lib/modules/$(uname -r)/

• load module on pi:

modprobe pijoy dev1=0,6

Links

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Building pi kernel

Github

Pi compiler tools

Pi kernel sources

Pi firmware (kernel+modules) builds

rpi-update tool for easy firmware update

Pi firmware mirror used by rpi-update tool

rpi-source utility that installs the kernel source