数字温度计课程设计报告(11)

主要采用单片机实现数字温度计功能,其中包含硬件和软件的实现部分

RET

;复位脉冲程序

RESET_PULSE: RESET:

NOP NOP

CLR DATA_BUS MOV DJNZ SETB MOV DJNZ

R7, #255 R7, $ DATA_BUS R7, #30 R7,$

SETB_FLAG

SETB

DATA_BUS

JNB DATA_BUS, CLR FLAG AJMP SETB DJNZ SETB

NEXT FLAG

SETB_FLAG: NEXT:

MOV

R7, #120

R7, $ DATA_BUS

RESET

JNB FLAG,

RET

;写命令

WRITE:

SETB

DATA_BUS

MOV CLR C

CLR DATA_BUS MOV DJNZ RRC A MOV MOV DJNZ SETB NOP DJNZ RET

R6, WRITING DATA_BUS, R7, #30H R7, $ DATA_BUS

C

R7, #5 R7, $ R6, #8

WRITING:

;循环显示段位

DISPLAY: MOV MOV MOV

R4, #200 A,

DIS_DP

DIS_LOOP:

P2, #0FFH