Using STM32F405RG Man Chester decoding

[yattr]

My previous post is locked so posted the results here.

I am using the Feather STM32F405 Express #4382 to successfully decode a 100us Man Chester 13 bit word using MicroPython. Yellow is the mChester signal and Blue is the timing read pulses. This in turn is controlling the speed of an autonomous digital slot car as shown here https://youtu.be/Ay6M8Zl6MT4

Screen Shot 2022-04-22 at 4.26.09 PM.jpg (858.1 KiB) Viewed 255 times

Screen Shot 2022-04-22 at 4.26.26 PM.jpg (715.38 KiB) Viewed 255 times

The complete code is based on a start sequence interrupt and synchronization followed by polling for the decode which in turn synchronizes the DAC speed values every 75ms.

This is just the code fragment for the synchronization word.

while y == 0:
if D6pinlow.value() == 0:
time.sleep_us(35)
D12pin.high()
bitvalue[y] = D6pinlow.value()
D12pin.low()
y += 1
while y <= (wordlength - 2):
time.sleep_us(70)
D12pin.high()
bitvalue[y] = D6pinlow.value()
D12pin.low()
y += 1

[tepalia02]

Thanks for sharing with us.