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use of subroutines work

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This commit is contained in:
Wolfgang Hottgenroth 2024-03-05 15:27:34 +01:00
parent 2d532a6403
commit c502303a36
2 changed files with 118 additions and 93 deletions
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120
colors.S
View File

@ -3,66 +3,66 @@
.section ".rodata","a"
screendata_tmpl:
.global screendata_tmpl
.byte _green
.byte _green
.byte _green
.byte _green
.byte _green
.byte _green
.byte _green
.byte _green
.byte _green
.byte _green
.byte _green
.byte _green
.byte _green
.byte _green
.byte _green
.byte _green
.byte _green
.byte _green
.byte _green
.byte _green
.byte _green
.byte _green
.byte _green
.byte _green
.byte _green
.byte _green
.byte _green
.byte _green
.byte _green
.byte _green
.byte _green
.byte _green
.byte _green
.byte _green
.byte _green
.byte _green
.byte _green
.byte _green
.byte _green
.byte _green
.byte _green
.byte _green
.byte _green
.byte _green
.byte _green
.byte _green
.byte _green
.byte _green
.byte _green
.byte _green
.byte _green
.byte _green
.byte _green
.byte _green
.byte _green
.byte _green
.byte _green
.byte _green
.byte _green
.byte _green
.byte _red
.byte _red
.byte _red
.byte _red
.byte _red
.byte _red
.byte _red
.byte _red
.byte _red
.byte _red
.byte _red
.byte _red
.byte _red
.byte _red
.byte _red
.byte _red
.byte _red
.byte _red
.byte _red
.byte _red
.byte _red
.byte _red
.byte _red
.byte _red
.byte _red
.byte _red
.byte _red
.byte _red
.byte _red
.byte _red
.byte _red
.byte _red
.byte _red
.byte _red
.byte _red
.byte _red
.byte _red
.byte _red
.byte _red
.byte _red
.byte _red
.byte _red
.byte _red
.byte _red
.byte _red
.byte _red
.byte _red
.byte _red
.byte _red
.byte _red
.byte _red
.byte _red
.byte _red
.byte _red
.byte _red
.byte _red
.byte _red
.byte _red
.byte _red
.byte _red
screendataend_tmpl:
.byte 0xff

91
main.S
View File

@ -76,20 +76,21 @@ _start:
;; initialize stack pointer with value from linker
mov.w #__stack, SP
;; ----------------------------------------------
;; load data from template area in rom into ram
;; uses arbitrary register before loading registers
;; for later use
mov.w #screendata, r7
mov.w #screendataend, r8
mov.w #screendata_tmpl, r9
_start_load_next:
mov.b @r9, @r7
inc.w r7
inc.w r9
cmp.w r7, r8
jnz _start_load_next
;; ----------------------------------------------
; ;; ----------------------------------------------
; ;; load data from template area in rom into ram
; ;; uses arbitrary register before loading registers
; ;; for later use
; mov.w #screendata, r7
; mov.w #screendataend, r8
; mov.w #screendata_tmpl, r9
;_start_load_next:
; mov.b @r9, @r7
; inc.w r7
; inc.w r9
; cmp.w r7, r8
; jnz _start_load_next
; ;; ----------------------------------------------
init:
;; configuration of GPIO Ports
@ -117,6 +118,38 @@ init:
mov.w #OUTMOD_7,&TA1CCTL1
mov.w #OUTMOD_7,&TA1CCTL2
;; initialize bit-counter for isr
mov.b #BIT_COUNTER_INIT_VALUE, BIT_COUNTER_REGISTER
;; initialize isr-sync register, signal BYTE_DONE for the first start
mov.b #SIGNAL_OCTET_DONE, SIGNAL_REGISTER
;; start timer in up mode
bis.w #MC0,&TA1CTL
;; enable interrupts
eint
mainloop:
call #resetscreen
call #drawscreen
jmp mainloop
resetscreen:
;; reset screen data
mov.w #screendata, r7
mov.w #screendataend, r8
resetscreen_continue:
mov.b #_off, @r7
inc.w r7
cmp.w r7, r8
jnz resetscreen_continue
ret
drawscreen:
;; initialize bit-counter for isr
mov.b #BIT_COUNTER_INIT_VALUE, BIT_COUNTER_REGISTER
;; initialize isr-sync register, signal BYTE_DONE for the first start
@ -127,15 +160,10 @@ init:
;; screen data end into r8
mov.w #screendataend, DATA_END_ADDRESS_REGISTER
;; start timer in up mode
bis.w #MC0,&TA1CTL
;; enable interrupts
eint
mainloop:
drawscreen_continue:
;; prepare next byte to handle by isr
cmp.w DATA_NEXT_ADDRESS_REGISTER, DATA_END_ADDRESS_REGISTER
jz mainloop_data_done
jz drawscreen_data_done
;; load next data byte
mov.b @DATA_NEXT_ADDRESS_REGISTER, NEXT_DATA_REGISTER
@ -148,42 +176,39 @@ mainloop:
;; enable isr
bis #SIGNAL_ISR_ENABLE, SIGNAL_REGISTER
mainloop_wait_for_isr_0:
drawscreen_wait_for_isr_0:
;; check bit0 in sync register
bit #SIGNAL_OCTET_DONE, SIGNAL_REGISTER
jz mainloop_wait_for_isr_0
jz drawscreen_wait_for_isr_0
;; load data
mov.b colors(NEXT_DATA_REGISTER), DATA_REGISTER
;; clear BYTE_DONE
bic #SIGNAL_OCTET_DONE, SIGNAL_REGISTER
mainloop_wait_for_isr_1:
drawscreen_wait_for_isr_1:
;; check bit0 in sync register
bit #SIGNAL_OCTET_DONE, SIGNAL_REGISTER
jz mainloop_wait_for_isr_1
jz drawscreen_wait_for_isr_1
;; load data
mov.b colors+1(NEXT_DATA_REGISTER), DATA_REGISTER
;; clear BYTE_DONE
bic #SIGNAL_OCTET_DONE, SIGNAL_REGISTER
mainloop_wait_for_isr_2:
drawscreen_wait_for_isr_2:
;; check bit0 in sync register
bit #SIGNAL_OCTET_DONE, SIGNAL_REGISTER
jz mainloop_wait_for_isr_2
jz drawscreen_wait_for_isr_2
;; load data
mov.b colors+2(NEXT_DATA_REGISTER), DATA_REGISTER
;; clear BYTE_DONE
bic #SIGNAL_OCTET_DONE, SIGNAL_REGISTER
;; continue
jmp mainloop
jmp drawscreen_continue
mainloop_data_done:
drawscreen_data_done:
;; signal all data processed, isr finish
bis #SIGNAL_ALL_DATA_DONE, SIGNAL_REGISTER
jmp mainloop_data_done
ret