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Neon816: replace buggy clock code; add MS delay word to platform

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mgcaret 2020-04-02 00:11:38 -07:00
parent 367ec0d98d
commit 5750e5d12f
2 changed files with 103 additions and 31 deletions
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112
platforms/Neon816/platform-lib.s
View File

@ -124,42 +124,94 @@ dword dKBDRESET,"$KBDRESET"
eword
; H: ( day hour minutes seconds ms us -- ) set RTC
; this probably isn't fast enough to reliably set micro and milliseconds
; The registers must be set starting with the microseconds and ending with the day
; when the day is written the clock registers are copied to the internal registers
dword SETRTC,"SETRTC"
ENTER
ONLIT RTCus
.dword WSTORE
ONLIT RTCms
.dword WSTORE
ONLIT RTCsec
.dword CSTORE
ONLIT RTCmin
.dword CSTORE
ONLIT RTChour
.dword CSTORE
ONLIT RTCday
.dword WSTORE
EXIT
txa
clc
adc #20
cmp STK_TOP
bcc :+
jmp _stku_err
: lda STACKBASE+0,x
sta RTCus
lda STACKBASE+4,x
sta RTCms
sep #SHORT_A
.a8
lda STACKBASE+8,x
sta RTCsec
lda STACKBASE+12,x
sta RTCmin
lda STACKBASE+16,x
sta RTChour
rep #SHORT_A
.a16
lda STACKBASE+20,x
sta RTCday
txa
clc
adc #24
tax
NEXT
eword
; H: ( -- day hour minutes seconds ms us ) get RTC
; The registers must be read starting with the microseconds to copy the internal
; registers to the clock registers.
dword GETRTC,"GETRTC"
ENTER
ONLIT RTCday
.dword WFETCH
ONLIT RTChour
.dword CFETCH
ONLIT RTCmin
.dword CFETCH
ONLIT RTCsec
.dword CFETCH
ONLIT RTCms
.dword WFETCH
ONLIT RTCus
.dword WFETCH
EXIT
lda #$0000
tay
jsr _pushay
jsr _pushay
jsr _pushay
jsr _pushay
jsr _pushay
jsr _pushay
lda RTCus
sta STACKBASE+0,x
lda RTCms
sta STACKBASE+4,x
sep #SHORT_A
.a8
lda RTCsec
sta STACKBASE+8,x
lda RTCmin
sta STACKBASE+12,x
lda RTChour
sta STACKBASE+16,x
rep #SHORT_A
.a16
lda RTCday
sta STACKBASE+20,x
NEXT
eword
.proc _getms
lda RTCus ; latch clock registers
lda RTCms ; get ms
rts
.endproc
; waits for up to 511 ms (ms timer is 0-999)
.proc _mswait
and #$1FF
beq :++
pha
jsr _getms
and #$1FF
pha
: jsr _getms
sec ; should we worry about 1 ms?
sbc 1,s
and #$1FF
cmp 3,s
bcc :-
pla
pla
: rts
.endproc
; NOTE: sets short accumulator and leaves it that way on exit!
.proc I2C2_busy_wait
sep #SHORT_A
@ -555,8 +607,6 @@ table: .addr _sf_pre_init
.dword drXT ; last word defined in the neon816 dictionary
.dword rBODY
.dword STORE
.dword GETRTC ; start the clock
.dword CLEAR
CODE
jmp _sf_success
.endproc

22
platforms/Neon816/platform-words.s
View File

@ -1,2 +1,24 @@
; Platform support dictionary words for Neon816
dword MS,"MS"
stz WR+2
jsr _popay
sta WR+1
tya
xba
sep #SHORT_A
.a8
sta WR
rep #SHORT_A
.a16
tya
and #$00FF ; do the first 1-255 ms
: jsr _mswait
lda WR
ora WR+1
beq :+ ; done if WR is zero
jsr _decwr
lda #$0100
bra :-
: NEXT
eword