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raspberrypi: Fix state machine allocation

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.. for duplicate programs, like two IncrementalEncoder instances.

Closes: #10024
This commit is contained in:
Jeff Epler 2025-02-04 10:08:41 -06:00
parent fe23bd7cf8
commit 455d856bcb
1 changed files with 6 additions and 4 deletions
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10
ports/raspberrypi/common-hal/rp2pio/StateMachine.c
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@ -247,10 +247,12 @@ static bool use_existing_program(PIO *pio_out, uint *sm_out, int *offset_inout,
if (_current_program_id[i][j] == program_id &&
_current_program_len[i][j] == program_len &&
(*offset_inout == -1 || *offset_inout == _current_program_offset[i][j])) {
*pio_out = pio;
*sm_out = j;
*offset_inout = _current_program_offset[i][j];
return true;
*sm_out = pio_claim_unused_sm(pio, false);
if (*sm_out >= 0) {
*pio_out = pio;
*offset_inout = _current_program_offset[i][j];
return true;
}
}
}
}