Is there any issue on WS2812?

[yanbwang]

Hi，

I'm using WS2812B-Mini now.

The datasheet is below

https://atta.szlcsc.com/upload/public/pdf/source/20190620/C114583_ECCAEB884D1CBA01F5696FFC90F90D84.pdf

I find there is something wrong with Blue color. Eg. I set RGB as 00,00,FF， the color is Red+Blue.

And I also noticed you have remove the example file of WS2812 in your code.

Could you tell me why? Have you found some issue in your WS2812 library?

Thanks.

Z.t

[DeqingSun]

I didn't remove the example. It is still on https://github.com/DeqingSun/ch55xduino/blob/ch55xduino/ch55xduino/ch55x/libraries/WS2812/examples/chaseTest/chaseTest.ino

I've tested on my WS2812 and it worked well. If doesn't work on your side. Would you mind providing more sample of the wrong color?

[yanbwang]

Hi，

Yes, I can see your WS2812 code now. I don't know why the ZIP I downloaded didn't have this demo code.

I will study it tonight.

Thanks，

Z.t

[yanbwang]

Hi,

I have fixed this issue. It's caused by the time requirement is different from the one in library.

  WS2812D-F8 | WS2812B-Mini T0H | 400±150ns | 300±80ns T0L | 850±150ns | 790±210ns T1H | 850±150ns | 790±210ns T1L | 400±150ns | 790±210ns RES | >50us | >280us

After I change the data transfter time as the one of WS2812B-Mini, it works well.

Thanks a lot for your works.

Z.t

[buttim]

How did you change the timing? It seems the only possibility here is changing the number of nops in the code. I have some issues with the last of 16 LEDs. The last LED always has blue unchanged (stays off if it's off, on if it is on).

[DeqingSun]

@buttim if you see a lot of nop, you should update the CH55xduino Now you can change WS2812_DELAY

[buttim]

That's really good news. How comes I can't see the possibility to upgrade from the IDE?

[buttim]

Did not add the URL in settings actually

[buttim]

Version 0.20 has no problem at all, did not even have to change the timings. Thanks a lot