Rainbow Electronics ADC0838 - Manual (Page 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 e 1
OGI G0e0 (CSe0)
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
XAS
LOADS MUX ADDRESS FROM
ACCUMULATOR TO SIO REGISTER
u
8 INSTRUCTIONS
v
XAS READS HIGH ORDER NIBBLE (4 BITS)
INTO ACCUMULATOR
XIS PUTS HIGH ORDER NIBBLE INTO RAM
CLR A CLEARS ACCUMULATOR
RC C e 0
XAS READS LOW ORDER NIBBLE INTO
ACCUMULATOR AND STOPS SK
XIS PUTS LOW ORDER NIBBLE INTO RAM
OGI G0e1 (CSe1)
LEI DISABLES SIO’s INPUT AND OUTPUT
8048 CODING EXAMPLE
Mnemonic Instruction
START ANL P1 0F7H SELECT A D (CSe0)
MOV B 5 BIT COUNTER w 5
MOV A ADDR A w MUX ADDRESS
LOOP 1 RRC A CY w ADDRESS BIT
JC ONE TEST BIT
BITe0
ZERO ANL P1 0FEH DI w 0
JMP CONT CONTINUE
BITe1
ONE ORL P1 1 DI w 1
CONT CALL PULSE PULSE SK 0 x 1 x 0
DJNZ B LOOP 1 CONTINUE UNTIL DONE
CALL PULSE EXTRA CLOCK FOR SYNC
MOV B 8 BIT COUNTER w 8
LOOP 2 CALL PULSE PULSE SK 0 x 1 x 0
IN A P1 CY w DO
RRC A
RRC A
MOV A C A w RESULT
RLC A A(0) w BIT AND SHIFT
MOV C A C w RESULT
DJNZ B LOOP 2 CONTINUE UNTIL DONE
RETR
PULSE SUBROUTINE
PULSE ORL P1 04 SK w 1
NOP DELAY
ANL P1 0FBH SK w 0
RET
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