martin/aqhomecontrol
Public Access
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

avr: started adding com2wn module (multiple com2w devices in one)

Browse Source
This commit is contained in:
Martin Preuss
2025-08-03 00:55:52 +02:00
parent 6c5dc21f6a
commit 8c13f9fdf7
8 changed files with 1305 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

119
avr/modules/com2w/com2wn_wait.asm Normal file
View File

@@ -0,0 +1,119 @@
; ***************************************************************************
; copyright : (C) 2025 by Martin Preuss
; email : martin@libchipcard.de
;
; ***************************************************************************
; * This file is part of the project "AqHome". *
; * Please see toplevel file COPYING of that project for license details. *
; ***************************************************************************
#ifndef AVR_MODULES_COM2W_COM2WN_WAIT_H
#define AVR_MODULES_COM2W_COM2WN_WAIT_H
; WORK IN PROGRESS
.cseg
; ---------------------------------------------------------------------------
; @routine com2wWaitForClockHighMulti10Us
;
; Wait for high CLK
;
; @param R20 multiple of 10us to wait (e.g. "2" for "20" us, max: 32)
; @return CFLAG set if okay (state reached), cleared on error
; @clobbers: r16, r20, r22
com2wWaitForClockHighMulti10Us:
.if clock == 8000000
add r20, r20 ; *2
add r20, r20 ; *4
add r20, r20 ; *8
.endif
.elif clock == 1000000
; nothing to do
.else
.error "Unhandled clock speed"
.endif
ldd r22, Y+COM2W_IFACE_OFFS_PINMASK_CLK ; +2
com2wWaitForClockHighMulti10Us_loop: ; 10 cycles per loop
inr r16, COM_CLK_INPUT ; +1 (if low port, +2 if high port)
and r16, r22 ; +1
brne com2wWaitForClockHighMulti10Us_stateReached ; +1 if FALSE, +2 if TRUE
inr r16, COM_CLK_INPUT ; +1 (if low port, +2 if high port)
and r16, r22 ; +1
brne com2wWaitForClockHighMulti10Us_stateReached ; +1 if FALSE, +2 if TRUE
nop ; +1
dec r20 ; +1
brne com2wWaitForClockHighMulti10Us_loop ; +2 if TRUE, +1 if FALSE
clc ; +1
ret ; +4
com2wWaitForClockHighMulti10Us_stateReached:
sec ; +1
ret ; +4
; @end
; ---------------------------------------------------------------------------
; @routine com2wWaitForClockLowMulti10Us
;
; Wait for low CLK
;
; @param R20 multiple of 10us to wait (e.g. "2" for "20" us, max: 32)
; @return CFLAG set if okay (state reached), cleared on error
; @clobbers: r16, r20, r22
com2wWaitForClockLowMulti10Us:
.if clock == 8000000
add r20, r20 ; *2
add r20, r20 ; *4
add r20, r20 ; *8
.endif
.elif clock == 1000000
; nothing to do
.else
.error "Unhandled clock speed"
.endif
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
#endif ; AVR_MODULES_COM2W_COM2WN_WAIT_H