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Advanced users • Re: RP1 PIO DMA speed on Raspberry Pi 5 unexpectedly slow

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The EEPROM version is the same as yours. I'm sending 16-bit samples at 5.4 Ms/s so that's about 10.8 Mbytes/s.

My PIO program is pretty simple, just passes the data straight to GPIO pins and generates a clock signal:

Code:

.program dac16.side_set 1nopside 0out pins, 16side 1nopside 0out pins, 16side 1.wrap
On the oscilloscope I can see a pause between every pair of samples while it waits for new data from the FIFO.

Statistics: Posted by fsphil — Sun Aug 03, 2025 9:02 am



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