Stereo System User Manual

Implementation Details
5-63 Code Development Tools
DATA _cprte
;–––––––––––––––––––––––––––––––––––––––––––––––––––––
;–––––––––––––––––––––––––––––––––––––––––––––––––––––
; called from C––
; void wait(int msec)
; waits for the amount of msec passed
; Calls: wait1ms
;–––––––––––––––––––––––––––––––––––––––––––––––––––––
_wait
mov a0, *r7 – 2
shlac a0, a0
mov *tempa, a0
mov r4, *tempa
_rep call wait1ms ;wait 1ms
jrnzp _rep,r4–– ;decrement counter by 2
ret
;–––––––––––––––––––––––––––––––––––––––––––––––––––––
;****************************************************************
; Pause for 1ms
;
; Input
; Output
; Uses
; Calls wait200us
;****************************************************************
wait1ms
call wait200us
call wait200us
call wait200us
call wait200us
call wait200us
ret
;****************************************************************
; Pause for 200us
;
; Input
; Output
; Uses
;****************************************************************
wait200us
rpt 256–2
nop
rpt 256–2
nop
rpt 256–2
nop
rpt 256–2
nop
rpt 256–2
nop
rpt 256–2
nop
rpt 64–2