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jgarff / rpi_ws281x

Userspace Raspberry Pi PWM library for WS281X LEDs
BSD 2-Clause "Simplified" License
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Raspberry Pi 4 Rev 1.2 #376

Closed TheChuckWhite closed 2 years ago

TheChuckWhite commented 4 years ago

Hi, just got a new Raspberry Pi 4 and tried to run my old code when i get this error message: RuntimeError: ws2811_init failed with code -3 (Hardware revision is not supported)

Some other people had this problem with older models before and so I checked my Revision with cat /proc/cpuinfo and is says Revision : c03112 Model: Raspberry Pi 4 Model B Rev 1.2

and compared it with the revision in rpihw.c and there was the problem: //Raspberry Pi 4 .hwver = 0xC03111,

After a quick change I thought I am done, but now I'm just too stupid to install the lib into the right directory because the -d flag for setup.py install is not working (the error message says to specify the lib directory with -d because the default one seems to be wrong for me).

I've only used pip to install libs, so I really don't know how to do that stuff. Hope it gets updated soon.

Update: Managed to install the local files with Python2 instead of 3 but the module is named rpi-ws281x instead of rpi_ws281x and that seems to be wrong syntax for import statements. Maybe a pro can give me some tips here.

Update2: My code is running when I import neopixel instead of rpi_ws281x but still no light, same with the examples. GPIO pin seems to be working, tested with a regular led. I'm done fiddling and will just wait for an update.

b4nter commented 4 years ago

This code might not be compatible with RPI 4 indeed. See my issue https://github.com/jgarff/rpi_ws281x/issues/372

Also, what exactly RGB lights do you have?

TheChuckWhite commented 4 years ago

I have some different panels and a ton of strips. All are ws2812b.

Gadgetoid commented 4 years ago

I don't have my hands on the rev 1.2 Pi 4 to confirm that PR #378 works, but a quick check of the revision number confirms that it's valid for a PCB Revision 2 version of the 4GB Pi 4.

No doubt there will need to be similar editions for both the 1GB and 2GB versions- I'll add these premptively since the revision IDs should be predictable.

Edit: Raised #379 for 1GB and 2GB versions.

Huanbo-Sun commented 4 years ago

Hi there, I have implemented in such a way that it works:

  1. uninstall rpi_ws281x: sudo pip3 uninstall rpi_ws281x
  2. download and extract the zip file from https://github.com/jgarff/rpi_ws281x/tree/master
  3. modify and save the rpihw.c files: the line ".hwver = 0xC03111" to ".hwver = 0xC03112"
  4. sudo python3 setup.py install
  5. run the LED script with sudo and it works for me. Best