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libre-computer-project / libretech-saled-light

NeoPixels WS2812 SK9822 Userspace Driver for Libre Computer Boards
GNU General Public License v2.0
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No usage instructions #2

Open guysoft opened 1 week ago

guysoft commented 1 week ago

He, Assuming you have an LED connected to PWM port 12. or to anything really - how do you use this library?

guysoft commented 1 week ago

Ok I managed to figure that ws2812-uart-gxl-aml6.ini means it sends the data on UART, and that the PHP is actually used for calculations. In order to get UART6 to work you need to run:

sudo ldto enable uarta-clk81

Then the TX pin of the UART is used to send the data (in this case on the Le Potato its pin 8, just after the VCC,VCC,GND on the GPIO pinnout).

However with a short strip it just displays a lot bright nearly-white colors, I am not sure how to program anything of my own on it.

The script is run using:

bash -x ./run.sh ./config/ws2812-uart-gxl-aml8.ini
dsx724 commented 1 week ago

You need a level shifter with a schmitt trigger. You need to specify the LED matrix dimensions and traversal pattern. Then you pass an RGB buffer into the LED program, eg. /dev/fb0 or one of the example generators.

guysoft commented 5 days ago

It might be that the LEDs I am using don't need it. It seems to be driving them fine. Just really really fast. If I add a sleep at the end of the loop here (1 sec): https://github.com/libre-computer-project/libretech-saled-light/blob/master/gen/rgb-bg-step#L58

I get this behavior, its sending the correct color code:

https://youtu.be/bqZwVCgt53s