SES APPLIC-37 Manual Del Usuario página 90

Appendix
;APPLIC37 analog A51 sample routines
;
;DAC1 routine outputs the accumulator contents to the analog output channel 1
;DAC2 routine outputs the accumulator contents to the analog output channel 2
;
;ADC routine reads one of the analog channels (according to the accumulator
contents(
;and returns the analog channel value in the accumulator
;
-------------- ;
;Hardware Handling
;
DAC_SYNC EQU
SER_CLK EQU
SER_DI EQU
SER_DO EQU
ADC_CS EQU
;SARS EQU
;
;
----------- - ;
; DAC1 ROUTINE
; INPUT :
; OUTPUT :
; CALLS:
SDAC
; USES:
------------ ;
DAC1: PUSH ACC
CLR SER_CLK;
CLR DAC_SYNC
;
MOV A,#03H
LCALL SDAC
;
POP ACC
LCALL SDAC
;
SETB DAC_SYNC
RET;
;
------------ ;
; DAC2 ROUTINE
; INPUT :
; OUTPUT :
; CALLS:
; USES:
------------ ;
DAC2: PUSH ACC
CLR SER_CLK;
CLR DAC_SYNC
;
MOV A,#07H
A
P1.0
P1.1
P1.2
P1.3
P1.4
P1.5
A = Value for DAC1
none
A
;clear SYNC
;setup DAC 1
;send to the DAC
;send to the DAC
;STROBE DATA OUT
A = Value for DAC2
none
SDAC
A
;clear SYNC
;setup DAC 2
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