Weird crashes have weirdly resolved themselves after I tidied up some code. Measured 30 frames per sec updating a 480x320, 16bit colour, display with a RPi #Pico2 via SPI using the PIO feature.

And the maths checks out! SPI speed using PIO should be 75MHz. Which makes <eyes roll back whilst doing maths in head> 30.52fps. #electronics

While probing a GPIO pin on my oscilloscope, I noticed it toggled between 2.4V and 3.3V. Using another reference pin, toggling at exactly the same time swinged correctly between 0V and 3.3V

I think I might have damaged a pin on my #rp2350 :( #debugging #signals #embedded #pico2

Looking to turn my #Pico2 in a rudimentary #oscilloscope. Have been checking the ADC's samplerate and tried measuring an ultrasonic distance sensor's echo pulse. Not quite there yet, USB throughput is still a limiting factor.

https://embeddedjourneys.com/blog/pico-rudimentary-oscilloscope-1/

Stepper up and running. Set to default 1/8 microstepping, with the MCU sending a step every 100_000 ns.

Was having trouble with lower step delay--my quick review indicates the typical step low and step high time can be as small as 100 ns. I need to review the datasheet more in depth. Maybe I don't understand the possible interaction with microstepping or some other functionality.

#embedded #rust #raspberrypi #pico2