PIO for APRS sine wave generation

Project-CETI / whale-tag-recovery

APRS and Swarm satellite based GPS tracking for tags

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PIO for APRS sine wave generation #13

Closed kellyostrom closed 8 months ago

kellyostrom commented 2 years ago

Currently the sine wave for the APRS transmissions are using a simply loop functionality with a busy wait. There are some concerns that there is error delay accumulating from this as per #12, and if that's true, if the PIO could be used to generate the sine wave instead because of the higher precision in terms of timing. The PIO would allow better syncing with the clock to have a more accurate sine wave.

msalinoh commented 8 months ago

No longer relevant to latest STM32 based recovery board. Sinewave generation handled via DAC DMA with clock scaling for precise timing.