Category : Assembly Language Source Code
Archive   : SIG8051.ZIP
Filename : COFFEY.ASM

 
Output of file : COFFEY.ASM contained in archive : SIG8051.ZIP

;**********************************************************************
;
; A/D Test Program for the S87C752
; COFFEY.ASM CS=
; 2-12-90 4:41:52 pm K. COFFEY
;**********************************************************************

;
; Signetics 87C752 Special Function Registers
;
P0 equ 80h ;port 0
SP equ 81h ;stack pointer
DPL equ 82h ;data pointer low
DPH equ 83h ;data pointer high
PCON equ 87h ;power control
TCON equ 88h ;timer control
TL equ 8ah ;timer/counter low
RTL equ 8bh ;reload timer low
TH equ 8ch ;timer/counter high
RTH equ 8dh ;reload timer high
P1 equ 90h ;port 1
I2CON equ 98h ;I2C control
I2DAT equ 99h ;I2C data
IE equ 0a8h ;interrupt enable
P3 equ 0b0h ;port 3
PSW equ 0d0h ;program status word
I2CFG equ 0d8h ;I2C configuration
ACC equ 0e0h ;accumulator
B equ 0f0h ;B register
I2STA equ 0f8h ;I2C status
ADAT equ 084h ;A/D result
ADCON equ 0a0h ;A/D control

LIMIT 07FFh ;Sets limit of assembly.

; RAM locations used by A/D routines.


;**********************************************************************
; Begin ; Interrupt Location
;**********************************************************************

; Reset and interrupt vectors.

AJMP Reset ;Reset vector at address 0.
ORG 02Bh ;Set ROM address to 02B.
AJMP ADInt ;Jump to A/D interrupt routine.

;*********************************************************************
; A/D Interrupt Routine
;*********************************************************************
ORG 040h ;Set origin to 40
ADInt: SETB P0.2 ;Toggle interrupt bit.
CLR P0.2 ;
ORL ADCON,#08h ;Start conversion of AD1.
ADQuit: RETI ;Return from A/D routine.

;**********************************************************************
; Main Program Routines
;**********************************************************************

Init: SETB IE.7 ;Enable global interrupts.
SETB IE.6 ;Enable A/D interrupt.
RET ;Return from intitializing Routine.

;**********************************************************************
; Main Program
;**********************************************************************

Reset: MOV P0,#0FFh ;Insure P0 are all high.
ACALL Init ;Initialize system.
CLR P0.3 ;Pull sensor ground low.
MOV P1,#0FFh ;Set Port1 for special function.
MOV ADCON,#20h ;Load the A/D setup to ACC.
MOV ADCON,#28h ;Send A/D setup to ADCON.
Loop: SETB P0.0 ;A/D control display trigger.
MOV P3,ADCON ;Display A/D control on Port 3.
CLR P0.0 ;
SETB P0.1 ;A/D data display trigger.
MOV P3,ADAT ;Display A/D data on Port 3.
CLR P0.1 ;
AJMP Loop ;Loop main program.


  3 Responses to “Category : Assembly Language Source Code
Archive   : SIG8051.ZIP
Filename : COFFEY.ASM

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