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| author | Louis Burda <quent.burda@gmail.com> | 2022-12-02 16:06:32 +0100 |
|---|---|---|
| committer | Louis Burda <quent.burda@gmail.com> | 2022-12-02 17:18:16 +0100 |
| commit | 0392766bc379448c907de2bce45d6b57621d95b5 (patch) | |
| tree | b87705bfb60a6569769b3c0125a910144c784436 /src/uart_tx.pio | |
| parent | 6defee37f9939991bbf3152e2cd4e18593baa541 (diff) | |
| download | sxkbd-0392766bc379448c907de2bce45d6b57621d95b5.tar.gz sxkbd-0392766bc379448c907de2bce45d6b57621d95b5.zip | |
Added split uart support based on chibios impl
Diffstat (limited to 'src/uart_tx.pio')
| -rw-r--r-- | src/uart_tx.pio | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/src/uart_tx.pio b/src/uart_tx.pio new file mode 100644 index 0000000..61d2e1a --- /dev/null +++ b/src/uart_tx.pio @@ -0,0 +1,10 @@ +.program uart_tx +.side_set 1 opt pindirs + +.wrap_target + pull block side 1 [7] ; IDLE / STOP bit + set x, 7 side 0 [7] ; START bit +bitloop: + out pindirs, 1 ; 8 DATA bits + jmp x--, bitloop [6] +.wrap |