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add interrupt init code (and increase rtc tick rate)

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This commit is contained in:
Byron Lathi
2023-11-20 22:23:18 -08:00
parent 5e36d0824a
commit 7089b663ca
7 changed files with 244 additions and 230 deletions
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28
sw/kernel/devices/rtc.s
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@@ -14,6 +14,18 @@ RTC_IRQ_THRESHOLD = $20
RTC_OUTPUT = $30
RTC_CONTROL = $30
THRESHOLD_0 = $a0
; THRESHOLD_1 = $0f
THRESHOLD_1 = $00
THRESHOLD_2 = $00
THRESHOLD_3 = $00
; IRQ_THRESHOLD_0 = $32
IRQ_THRESHOLD_0 = $10
IRQ_THRESHOLD_1 = $00
IRQ_THRESHOLD_2 = $00
IRQ_THRESHOLD_3 = $00
; void init_rtc(void);
; Initialize rtc and generate 50ms interrupts
.proc _init_rtc
@@ -36,36 +48,36 @@ RTC_CONTROL = $30
lda #RTC_THRESHOLD+0 ; Set threshold to 4000 ($fa0)
sta RTC_CMD
lda #$a0
lda #THRESHOLD_0
sta RTC_DAT
lda #RTC_THRESHOLD+1
sta RTC_CMD
lda #$0f
lda #THRESHOLD_1
sta RTC_DAT
lda #RTC_THRESHOLD+2
sta RTC_CMD
lda #$00
lda #THRESHOLD_2
sta RTC_DAT
lda #RTC_THRESHOLD+3
sta RTC_CMD
lda #$00
lda #THRESHOLD_3
sta RTC_DAT
lda #RTC_IRQ_THRESHOLD+0 ; Set irq threshold to 50 ($32)
sta RTC_CMD
lda #$32
lda #IRQ_THRESHOLD_0
sta RTC_DAT
lda #RTC_IRQ_THRESHOLD+1
sta RTC_CMD
lda #$00
lda #IRQ_THRESHOLD_1
sta RTC_DAT
lda #RTC_IRQ_THRESHOLD+2
sta RTC_CMD
lda #$00
lda #IRQ_THRESHOLD_2
sta RTC_DAT
lda #RTC_IRQ_THRESHOLD+3
sta RTC_CMD
lda #$00
lda #IRQ_THRESHOLD_3
sta RTC_DAT
lda #$30