MicroPython Forum

Answering my own question based on a very quick test using a blinking LED connected to the DAC pin... Yes, it seems to work (for the blinking LED at least) by calling Timer(6).freq(f) , where f is the desired frequency. This is (to me at least) unexpected and delightful in its simplicity. I've been ...

After initiating a DMA transfer from a buffer to a DAC using DAC.write_timed() in DAC.CIRCULAR mode, is there any way to change the frequency at which the buffer is written to the DAC without a new call to DAC.write_timed()? For instance by acting on Timer(6)? My goal would be to imitate some kind o...

Questions: Is there a reasonable chance that the pyboard D would have out-of-the-box support for I2S? Or, conversely, is there any reason to think this is unlikely? Further: am I wrong in believing the micropython implementations of I2S only run on ESP32 boards? If that's correct, is there a technic...

I'm using the following: DAC.write_timed(buffer, 16000, mode=DAC.CIRCULAR) on pin X6 to generate an audio signal. SPI-MOSI on pin Y8 to drive a NeoPixel strip with JanBednarik's ws2812 library For some reason, my DAC becomes silent shortly after I call WS2812.send_buf(). I've checked that the DAC bu...

Hello,

Is DAC.write_timed() supported on ESP32 (more specifically, on the Sparkfun ESP32 Thing)?

I looked for information in the Github source for MicroPython, but didn't find anything.

Thanks,

- Mathieu

Great! But as I understand from your post on the other thread, the call to send() is still blocking during transfert, so CPU is not availabe for other tasks. Am I right? Right. First step was to get DMA working, and main reason for that was to get uninterrupted transfers with interrupts enabled. Pr...

Thanks, I'll try that and report here.

Hello, I'm currently driving a strip of 72 Neopixel LEDs (WS2812) from a pyboard using JanBednarik's ws2812 library [1]. I would like to know if there are other options which would provide faster refresh rates? I've looked at aykevl's FastLED [2], but I believe that it accelerates the computation of...

Hard to know what you've done, what you're trying to do. You say you are without much success, but then seem to go on and say that you are successfully reading values. What is it that you can't do? No code or console output provided to give us a clue what you are doing. Could you share a bit more a...

Dear all, I've been trying for a while to read values from a binary file containing unsigned short integers ('H'), without much success beyond reading and appending each value in a for loop. There must be a better option... What is the most efficient way to read from such a file and output an array(...