rpi-rgb-led-matrix
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hzeller
Trying to port lib to work with rk3566 and rk3399.
Due to the recent shortages of rpi , im trying to make the script work on rk3599 initially and later on rk3399 for rock 3 and rockpi 4.
any guidance would be appreciated if anyone has tried to do so.
You essentially need to read the datasheet of your SoC and re-implement the interface provided by gpio.h. If your SoC has a way to memory map GPIO pins (most important for fast access), you should be ready to go.
If you also has a way to create nicely timed pulses per hardware (as implemented as the HardwarePinPulser in gpio.cc, the output might also be pretty glitch-free. If not, the fallback implementation that manually wiggles the pin with a usleep() is a good default.
no. i put it on hold , mapping different gpio blocks is a little time consuming. shifted to teensy SmartMatrix as an alternative. will be resuming next month, was facing issues with accessing dev/mem
You essentially need to read the datasheet of your SoC and re-implement the interface provided by gpio.h. If your SoC has a way to memory map GPIO pins (most important for fast access), you should be ready to go.
If you also has a way to create nicely timed pulses per hardware (as implemented as the
HardwarePinPulserin gpio.cc, the output might also be pretty glitch-free. If not, the fallback implementation that manually wiggles the pin with ausleep()is a good default.
Thank you @hzeller ! I started to look at the internals to begin porting this for the Orange Pi5B. Assuming i can get one set working with being wired directly, I will work on a compatible daughter board using the schematics you have in this repo as a base.
My goal is to create a PR for all of this to use and hopefully get Electro Dragon to mass produce the daughter boards.
More to come :)
@jaygarcia all the best. due to changes in my schedule, I had to bench the port for rockchip.
no. i put it on hold , mapping different gpio blocks is a little time consuming. shifted to teensy SmartMatrix as an alternative. will be resuming next month, was facing issues with accessing dev/mem
@kvjoshi Closing kernel "CONFIG_STRICT_DEVMEM" makes "mmap" work.
