Rainbow-electronics ADC0838 Manual de usuario descargar pdf (Pagina 17)

Applications (Continued)

Digital Link and Sample Controlling Software for the

Serially Oriented COP420 and the Bit Programmable I/O INS8048

TL/H/5583–13

COP CODING EXAMPLE

Mnemonic Instruction

LEI ENABLES SIO’s INPUT AND OUTPUT

SC C

OGI G0

0 (CS

CLR A CLEARS ACCUMULATOR

AISC 1 LOADS ACCUMULATOR WITH 1

XAS EXCHANGES SIO WITH ACCUMULATOR

AND STARTS SK CLOCK

LDD LOADS MUX ADDRESS FROM RAM

INTO ACCUMULATOR

NOP Ð

XAS LOADS MUX ADDRESS FROM

ACCUMULATOR TO SIO REGISTER

8 INSTRUCTIONS

XAS READS HIGH ORDER NIBBLE (4 BITS)

INTO ACCUMULATOR

XIS PUTS HIGH ORDER NIBBLE INTO RAM

CLR A CLEARS ACCUMULATOR

RC C

XAS READS LOW ORDER NIBBLE INTO

ACCUMULATOR AND STOPS SK

XIS PUTS LOW ORDER NIBBLE INTO RAM

OGI G0

1 (CS

LEI DISABLES SIO’s INPUT AND OUTPUT

8048 CODING EXAMPLE

Mnemonic Instruction

START: ANL P1,

0F7H ;SELECT A/D (CS

MOV B,

5 ;BIT COUNTER

MOV A,

ADDR ;A

MUX ADDRESS

LOOP 1: RRC A ;CY

ADDRESS BIT

JC ONE ;TEST BIT

;BIT

ZERO: ANL P1,

0FEH ;DI

JMP CONT ;CONTINUE

;BIT

ONE: ORL P1,

1 ;DI

CONT: CALL PULSE ;PULSE SK 0

DJNZ B, LOOP 1 ;CONTINUE UNTIL DONE

CALL PULSE ;EXTRA CLOCK FOR SYNC

MOV B,

8 ;BIT COUNTER

LOOP 2: CALL PULSE ;PULSE SK 0

IN A, P1 ;CY

RRC A

MOV A, C ;A

RESULT

RLC A ;A(0)

BIT AND SHIFT

MOV C, A ;C

RESULT

DJNZ B, LOOP 2 ;CONTINUE UNTIL DONE

RETR

;PULSE SUBROUTINE

PULSE: ORL P1,

04 ;SK

NOP ;DELAY

ANL P1,

0FBH ;SK

RET

1 2 ... 12 13 14 15 16 17 18 19 20 21 22 ... 31 32

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Rainbow-electronics ADC0838 Manual de usuario Pagina 17

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