roman-oberenkowski / pov-pi-led-driver

Persistence of vision display implementation - low-level app to drive LEDs in realtime using WiringPi and BCM2835 lib on Raspberry Pi Zero W. Provides frame buffer in shared memory and displays its contents.

pov-pi-led-driver

Persistence of vision display implementation - low-level app to drive LEDs in realtime using WiringPi and BCM2835 lib on Raspberry Pi Zero W. Provides frame buffer in shared memory and displays its contents. LED model: APA102.

Notes

pov-pi-led-driver was created as a part of engineering diploma at PUT by Roman Oberenkowski. Device (hardware part) created by Roman Oberenkowski and Paweł Szalczyk. Photos and schematic by Paweł Szalczyk.

Required libraries:

• WiringPi 2.50 http://wiringpi.com/download-and-install/
• BCM2835 1.71 https://www.airspayce.com/mikem/bcm2835/

Configuration

Set parameters by editing header file led_constants.h. That includes:

• LED Count, vertical resolution - picture height
• COLUMNS_COUNT, horizontal resolution - picture "width"

Compilation and launch:

Following commands will compile and run LED driver. Resulting binary requires higher privileges (because of BCM2835)

• Compile: g++ −o leddrvexec leddriver.cpp −lbcm2835 −lwiringpi
• Allow execution: chmod u+x leddrvexec
• Run with sudo ./leddrvexec

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