Raspberry Pi 5 Support

Experimental Raspberry Pi 5 Support

Support for the Raspberry Pi 5 is now available. Due to significant changes in the Raspberry Pi hardware, namely the RP1 chipset, a kernel module is now required. Currently these instructions are for using GPIO 12. Other pins and more channels will be added to the driver soon. I know there has been significant demand for this feature, so I wanted to get this out as soon as I could.

Requirements

• Rasbperry Pi OS 64-bit
• Repository pi5 branch
• Kernel Header Package
• Device Tree Compiler
• Device Tree Overlay
• pinctrl Utility

Installing Required Components

• Kernel Header Package

  $ sudo apt install linux-headers

• Device Tree Compiler

  $ sudo apt install device-tree-compiler

• Pin Control Utility

  $ sudo apt install raspi-utils

Building the Kernel Driver

• Check out the pi5 branch

  $ git checkout pi5

• Go into the rp1_ws281x_pwm subdirectory.

  $ cd rp1_ws281x_pwm

• Build the kernel module.

  $ make

Building Device Tree Overlay

• Build the device tree overlay

  $ ./dts.sh

Loading the Kernel Driver

• Loading the kernel module from the driver directory.

  $ sudo insmod ./rp1_ws281x_pwm.ko

• Loading the device tree overlay. This will initialize the device.

  $ sudo dtoverlay -d . rp1_ws281x_pwm

• Setting up the GPIO (for GPIO 12).

  $ sudo pinctrl set a3 pn

Testing

• From the base directory, build the library and test program

  $ cmake . ; make

• Run the test program

  $ ./test