//Here we use a single buffer mode, the microcontroller sends the DAC0832 every 1s
//The output voltages of the five data 3FH, 7FH, F0H, 0FFH, and 00H change cyclically.
//This program must set up the circuit diagram, and all DA pins are set in working state
ORG 0000H
AJMP MAIN
ORG 0030H
MAIN:
MOV A,#3FH
MOV P0,A
SETB P3.6 ;WR1 falling edge to convert
CALL DELAY
CLR P3.6
CALL DELAY
MOV A,#7FH
MOV P0,A
SETB P3.6
CALL DELAY
CLR P3.6
CALL DELAY
MOV A,#0F0H
MOV P0,A
SETB P3.6
CALL DELAY
CLR P3.6
CALL DELAY
MOV A,#0FFH
MOV P0,A
SETB P3.6
CALL DELAY
CLR P3.6
CALL DELAY
MOV A,#00H
MOV P0,A
SETB P3.6
CALL DELAY
CLR P3.6
CALL DELAY
AJMP MAIN
DELAY: ; Delay function
MOV R4,#5
L3:MOV R5,#100
L2:MOV R6,#250
DJNZ R6,$
NOP
NOP
DJNZ R5,L2
DJNZ R4,L3
RET
END
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