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Spike fix #9

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Merged
mkalkbrenner merged 2 commits into from
Nov 6, 2025
Merged

Spike fix #9

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bc8647f
Fixed pixel count
PastorL69 Nov 6, 2025
82dd7a9
fix comments
PastorL69 Nov 6, 2025
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16 changes: 8 additions & 8 deletions src/dmd_interface_spike.pio
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Original file line number Diff line number Diff line change
Expand Up @@ -14,14 +14,14 @@


.program dmd_reader_spike
; initialize y with 4095, number of pixels (128x32) - 1 because counting starts at 0.
set x, 31 ; load 31, 5 bits is max allowed (0b11111)
in x, 5 ; shift in 5 bits, isr is 31 now
set x, 31 ; load 31, 5 bits is max allowed (0b11111)
in x, 5 ; shift in 5 bits, isr is 1023 now
set x, 3 ; load 3
in x, 2 ; shift in 2 bits, isr is 4095 now (128x32 - 1)
mov y, isr ; copy 4095 to y
; initialize y with 16383, number of pixels (128x32x4) - 1 because counting starts at 0.
set x, 31 ; x = 31 (max 5-bit value)
in x, 5 ; shift in 5 bits, isr = 31
set x, 31 ; x = 31
in x, 5 ; shift in 5 bits, isr = 1023
set x, 31 ; x = 31
in x, 4 ; shift in 4 bits, isr = 16383
mov y, isr ; y = 16383

.wrap_target
mov x, y ; load number of pixels
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