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avr: more work on com2wn module.

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This commit is contained in:
Martin Preuss
2025-09-01 23:25:02 +02:00
parent 81669a5442
commit b95a4fa872
6 changed files with 38 additions and 83 deletions
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75
avr/modules/com2w/com2wn_wait.asm
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@@ -163,81 +163,6 @@ com2wWaitForClockLowMulti10Us_stateReached:
.if clock > 1000000
; begin version for > 1000000 Hz
ldi r20, LOW(clock/1000000)
ldd r22, Y+COM2W_IFACE_OFFS_PINMASK_CLK ; +2
com2wWaitForClockLowMulti10Us_loop0:
push r20 ; +2
com2wWaitForClockLowMulti10Us_loop: ; 10 cycles per loop
inr r16, COM_CLK_INPUT ; +1 (if low port, +2 if high port)
and r16, r22 ; +1
breq com2wWaitForClockLowMulti10Us_stateReached ; +1 if FALSE, +2 if TRUE
inr r16, COM_CLK_INPUT ; +1 (if low port, +2 if high port)
and r16, r22 ; +1
breq com2wWaitForClockLowMulti10Us_stateReached ; +1 if FALSE, +2 if TRUE
nop ; +1
dec r20 ; +1
brne com2wWaitForClockLowMulti10Us_loop ; +2 if TRUE, +1 if FALSE
pop r20 ; +2
dec r20 ; +1
brne com2wWaitForClockLowMulti10Us_loop0 ; +1 if FALSE, +2 if TRUE
clc ; +1
ret ; +4
com2wWaitForClockLowMulti10Us_stateReached:
pop r20
sec ; +1
ret ; +4
; end version for > 1000000 Hz
.elif clock < 1000000
.error "Clock speed too low"
.else
; begin version for 1000000 Hz
ldd r22, Y+COM2W_IFACE_OFFS_PINMASK_CLK ; +2
com2wWaitForClockLowMulti10Us_loop: ; 10 cycles per loop
inr r16, COM_CLK_INPUT ; +1 (if low port, +2 if high port)
and r16, r22 ; +1
breq com2wWaitForClockLowMulti10Us_stateReached ; +1 if FALSE, +2 if TRUE
inr r16, COM_CLK_INPUT ; +1 (if low port, +2 if high port)
and r16, r22 ; +1
breq com2wWaitForClockLowMulti10Us_stateReached ; +1 if FALSE, +2 if TRUE
nop ; +1
dec r20 ; +1
brne com2wWaitForClockLowMulti10Us_loop ; +2 if TRUE, +1 if FALSE
clc ; +1
ret ; +4
com2wWaitForClockLowMulti10Us_stateReached:
sec ; +1
ret ; +4
; end version for 1000000 Hz
.endif
; @end
#endif ; AVR_MODULES_COM2W_COM2WN_WAIT_H