MicroPython Forum (Archive)

Update: This takes 42ms to run. is there any option to speed it up?

So i'm working on a project with 120 APA102 LEDs and it's insanely slow. Same goes for Neopixels. The problem isn't the writing itself (this takes about 2ms) but rather the filling / overwriting of the bytearray (which takes about 100ms for the 120*4 Values).
Any pointers on how i can speed this up?

using the ADC interface. it's a max4466 electret microphone

sorry my second comment was useless. don't know how i double posted this

true. but this won't keep me from only sampling 1000 inputs per second?

right. but even if i do it that way i can only sample 1000 times per second, right?

def handleInterrupt(timer): global beat val = mic.read() [do some calculations and stuff create the envelope value that determines the bass, cutting out here because it's not really ready and a little offtopic] timer.init(period=1, mode=machine.Timer.PERIODIC, callback=handleInterrupt) def run(thre...

yeah this is the way i handled it. unfortunately the interrupt-timer can only go down to 1ms? or is there an option i'm missing?

i could probably do with less. The main problem is that the "writing the LEDs" is blocking the reading (for about 0.5ms per LED) and if i have to write LEDs four times a second (beat on, beat off, assuming the track has 120bpm) , i'm gonna loose a a quarter of all samples no matter how often i sampl...

If this is normal audio, how is 10,000 samples per minute enough? That’s 167 samples per second aka 167Hz. Sent from my iPhone using Tapatalk Pro asking the important questions, eh ;) first of all i made a mistake, it's not per minute it's per second, but actually only 1000 per second, which is fin...