Do you want something like this (completely untested)?
You'd write a 16 bit integer with value n-1 for n pulses, 50% duty cycle, to the FIFO.
Code:
; pull out 16 bit integers from FIFO, and generate n+1 pwm pulses; autopull, joined FIFO.side_set 1.wrap_targetout y, 16 side 0loop_start:jmp y-- loop side 1.wraploop:jmp loop_start side 0The PIO runs off the system clock, and you can divide it down with the SMx_CLKDIV registers. So for the PIO program from above running at 400 kHz for a 200 kHz output wave at a system clock of 100 MHz the divider would be 250.And how do I set the PIO frequency give an output of exact frequency??
Statistics: Posted by Tharre — Sun May 04, 2025 6:20 pm