Is there an option to use channel 1 instead of zero?

[yohayg]

I'm using GPIO pin 13 which will work when the channel is 1 and not zero.

There is no option to pass the channel number in the native.

[mattjlewis]

Hi, what aspect of diozero are you referring to here?

[yohayg]

diozero-ws281x-java. I'm trying to use WS281xTest.java to set the channel same as in https://github.com/jgarff/rpi_ws281x/blob/master/python/examples/strandtest.py

[mattjlewis]

I've just committed code that hopefully fixes this. Could you test and close the issue if it works please (I need to dig out my neopixels...). I'm in the processing of pushing the new snapshot build to maven central too.
Thanks, Matt

[yohayg]

Great, thanks I'll check. (I have just finished building my own jni for setting the channel). I'll test it first thing tomorrow!

[yohayg]

OK it works. The only thing I had to fix is in com_diozero_ws281xj_WS281x.c from

jobject direct_buffer = (*env)->NewDirectByteBuffer(env, led_string.channel[0].leds, numLeds*sizeof(ws2811_led_t));

to
jobject direct_buffer = (*env)->NewDirectByteBuffer(env, led_string.channel[channel].leds, numLeds*sizeof(ws2811_led_t));

[mattjlewis]

Great, thanks for testing. I've committed that change, I'll push a new snapshot build tonight and close this issue when done.