51单片机超声波测距Proteus仿真 lcd1602显示按键设置报警范围汇编语言程序 -

LCD_RS BIT P1.0 //LCD1602引脚定义
LCD_RW BIT P1.1
LCD_EN BIT P1.2
LCD_DATA EQU P0 //数据并行口
key1 BIT P1.3 //设置
key2 BIT P1.4 //减1
key3 BIT P1.5 //加1
ECHO BIT P3.6 //回波信号端
TRIG BIT P3.7 //触发信号端
LED BIT P2.0 //
BEE BIT P2.1
water_in BIT P2.2
water_out BIT P2.3
TIME_FULL BIT 20H
START_FLAG BIT 21H
TX EQU 40H //定时器用
S_HH EQU 41H //距离上限高8位
S_HL EQU 42H //距离上限低8位
S_LH EQU 43H //距离下限高8位
S_LL EQU 44H //距离下限低8位
S_H EQU 45H //距离高8位
S_L EQU 46H //距离低8位
SET_FLAG EQU 47H //设置按键按下标志 1设置上限 2设置下限
ORG 0000H
LJMP MAIN
ORG 000BH //定时器0入口
LJMP TIME0
ORG 001BH
LJMP TIME1
ORG 0030H
MAIN:
CLR TRIG
CLR TIME_FULL
MOV SP,#52H //预置堆栈地址
MOV R0,#40H
MOV A,#0
CLR_ADD: //把40H-5FH的内容清零
MOV @R0,A
INC R0
CJNE R0,#60H,CLR_ADD
MOV S_HH,#1
MOV S_HL,#00H ;上限=S_HH*256+S_HL
MOV S_LH,#0
MOV S_LL,#00H
MOV S_H,#1
MOV S_L,#0
MOV SET_FLAG,#0
CLR START_FLAG
LCALL LCD1602_INIT //1602初始化
LCALL DELAY2
MOV A,#80H
LCALL WRITE_1602COM
MOV DPTR,#CODE_PRINT1
LCALL PRINT //格式："Now S: "
MOV A,#0C0H
LCALL WRITE_1602COM
MOV DPTR,#CODE_PRINT2
LCALL PRINT //格式："Set H L "
MOV TMOD,#11H //初始化定时器
MOV TH0,#0; //用于检测超时
MOV TL0,#0;
MOV TH1,#(65536-50000)/256 //50MS 触发
MOV TL1,#(65536-50000)MOD 256
SETB EA
SETB ET0
SETB ET1 //开启中断
SETB TR1
LCALL DISPLAY1
//主循环
LOOP:
LCALL KEYBOARD //调用按键
MOV A,#0
CJNE A,SET_FLAG,LOOP1
SETB TR1
LOOP7:
JB ECHO,LOOP2
SETB START_FLAG
SJMP LOOP7
LOOP2:
JNB START_FLAG,LOOP3 //为0表示不正常的值不更新
CLR START_FLAG
SETB TR0
LOOP6:
JNB ECHO,LOOP4
JB TIME_FULL,LOOP5 //超出范围
SJMP LOOP6
LOOP4:
CLR TR0
LCALL COUNT
LCALL DISPLAY2 //显示距离
LCALL FUNTION //判断范围
SJMP LOOP3
LOOP5:
CLR TIME_FULL
CLR TR0
MOV TH0,#0;
MOV TL0,#0;
MOV A,#89H
LCALL WRITE_1602COM
MOV DPTR,#CODE_PRINT3
LCALL PRINT //格式："Err"
CLR LED
CLR BEE //超时仅报警
LOOP3:
SJMP LOOP
LOOP1:
CLR TR1 //按键设置的时候禁止测量
CLR TR0
LCALL DISPLAY1 //有按键时在屏幕上更新上下限的值
LJMP LOOP
FUNTION:
CLR C
MOV A,S_H //实际值减去下限
SUBB A,S_LH
MOV B,A
JNC FUN0 //为0跳转继续判断为1说明低于下限
FUN1:
CLR water_in //注水开灯报警
CLR LED
CLR BEE
SJMP FUN
FUN0:
MOV A,S_L
SUBB A,S_LL
JNC FUN2 //低8位是否有借位
MOV A,B
CJNE A,#1,FUN1 //有借位B为1说明测量值大于下限判断上限
FUN2: //实际值和上限相比较
CLR C
MOV A,S_HH
SUBB A,S_H
MOV B,A
JNC FUN3
FUN4:
CLR water_out
CLR LED
CLR BEE
SJMP FUN
FUN3:
MOV A,S_HL
SUBB A,S_L
JNC FUN5 //
MOV A,B
CJNE A,#1,FUN4
FUN5:
SETB water_in
SETB water_out
SETB LED
SETB BEE
FUN:
RET
COUNT: //计算距离 cm=us/58
MOV R1,TH0
MOV R0,TL0
MOV S_L,#0
MOV S_H,#0
MOV TH0,#0
MOV TL0,#0
_D1:
CLR C //循环被除数减去除数的次数就是这个商
MOV A, R0
SUBB A, #3AH
MOV R0, A
MOV A, R1
SUBB A, #0
MOV R1, A
JC _D2
INC S_L
MOV A,S_L
CJNE A,#0,_D1
INC S_H
SJMP _D1
_D2:
RET
//显示数字函数
DISPLAY1:
//显示上下限
MOV A,#0C5H
LCALL WRITE_1602COM
MOV A,#' '
LCALL WRITE_1602DAT
MOV A,SET_FLAG
CJNE A,#1,DIS1
MOV A,#0C5H
LCALL WRITE_1602COM
MOV A,#'*'
LCALL WRITE_1602DAT
SJMP DIS2
DIS1:
CJNE A,#2,DIS2
MOV A,#0CBH
LCALL WRITE_1602COM
MOV A,#'*'
LCALL WRITE_1602DAT
DIS2:
MOV R6,S_HH
MOV R7,S_HL
LCALL HB2 //2字节16进制数转换为3字节压缩BCD码
MOV A,#0C6H
MOV B,R4
LCALL DIS_1WEI
MOV A,R5
LCALL DIS_2WEI
MOV R6,S_LH
MOV R7,S_LL
LCALL HB2 //2字节16进制数转换为3字节压缩BCD码
MOV A,#0CCH
MOV B,R4
LCALL DIS_1WEI
MOV A,R5
LCALL DIS_2WEI
RET
DISPLAY2:
//显示距离
MOV R6,S_H
MOV R7,S_L
LCALL HB2 //2字节16进制数转换为3字节压缩BCD码
MOV A,#089H
MOV B,R4
LCALL DIS_1WEI
MOV A,R5
LCALL DIS_2WEI
RET
//按键函数
KEYBOARD:
JB KEY1,K06 //设置
LCALL DELAY2
JB KEY1,K06
INC SET_FLAG
MOV A,SET_FLAG
CJNE A,#3,K07 //为3退出设置状态
MOV SET_FLAG,#0
MOV A,#0CBH
LCALL WRITE_1602COM
MOV A,#' ' //把*号去掉
LCALL WRITE_1602DAT
K07:
JNB KEY1,$
LJMP K00
K06:
MOV A,SET_FLAG
CJNE A,#0,K060
SJMP K00
K060:
JB KEY2,K04 //加
LCALL DELAY2
JB KEY2,K04
CJNE A,#1,K061 //按下设置键第一次上限第二次下限
INC S_HL //上限加不能高于500即可
MOV A,S_HL
CJNE A,#0F5H,K063 //最大值为1F4（500）,所以得先判断是否到最大值
MOV A,S_HH
CJNE A,#1,K063 //不相等表示没到500 继续设置
DEC S_HL
SJMP K05
K063:
MOV A,S_HL
CJNE A,#0,K05
INC S_HH //进位
SJMP K05
K061:
MOV A,S_LL //下限加不能高于上限且判断进位
CJNE A,S_HL,K062
MOV A,S_LH
CJNE A,S_HH,K062 //下限不能超过上限可以相等
SJMP K05
K062:
INC S_LL
MOV A,S_LL
CJNE A,#0,K05
INC S_LH
K05:
JNB KEY2,$
SJMP K00
K04:
JB KEY3,K00
LCALL DELAY1
JB KEY3,K00
MOV A,SET_FLAG
CJNE A,#1,K040
MOV A,S_HL //上限减不能低于下限且还得判断借位
CJNE A,S_LL,K041 //相等再判断高8位不相等直接减
MOV A,S_HH
CJNE A,S_LH,K041 //相等不做任何操作，不相等直接减
K042:
JNB KEY3,$
SJMP K00
K041:
DEC S_HL
MOV A,S_HL
CJNE A,#255,K042 //判断是否借位否直接退出
DEC S_HH
SJMP K042
K040: //下限减
MOV A,S_LL
CJNE A,#0,K043
MOV A,S_LH
CJNE A,#0,K043
SJMP K042 //下限为0不做任何操作
K043:
DEC S_LL
MOV A,S_LL
CJNE A,#255,K042 //判断是否有借位
DEC S_LH
SJMP K042
K00:
RET
//LCD1602初始化函数
LCD1602_INIT:
MOV A,#38H
LCALL WRITE_1602COM
MOV A,#0CH
LCALL WRITE_1602COM
MOV A,#06H
LCALL WRITE_1602COM
MOV A,#01H
LCALL WRITE_1602COM
RET
WRITE_1602COM: //写命令
CLR LCD_RS
CLR LCD_RW
MOV P0,A
LCALL DELAY1
SETB LCD_EN
LCALL DELAY1
CLR LCD_EN
RET
WRITE_1602DAT: //写数据
SETB LCD_RS
CLR LCD_RW
MOV P0,A
LCALL DELAY1
SETB LCD_EN
LCALL DELAY1
CLR LCD_EN
RET
//1602显示字符串函数
PRINT:
MOV R0,#0
PRINT01:
MOV A,R0
MOVC A,@A+DPTR
CJNE A,#0,PRINT00
RET
PRINT00:
LCALL WRITE_1602DAT
INC R0
SJMP PRINT01
//1602显示3位整数
DIS_3WEI:
MOV R0,A
MOV B,#100
DIV AB
CJNE A,#0,W1
MOV A,#' '
SJMP W2
W1:
ADD A,#30H
W2:
LCALL WRITE_1602DAT
MOV A,B
MOV B,#10
DIV AB
CJNE A,#0,W3
CJNE R0,#100,W5
SJMP W3
W5:
MOV A,#' '
SJMP W4
W3:
ADD A,#30H
W4:
LCALL WRITE_1602DAT
MOV A,B
ADD A,#30H
LCALL WRITE_1602DAT
RET
//1602显示2位整数
DIS_2WEI:
MOV B,#16
DIV AB
ADD A,#30H
LCALL WRITE_1602DAT
MOV A,B
ADD A,#30H
LCALL WRITE_1602DAT
RET
//1602显示1位整数
DIS_1WEI: ;A是地址 B放数据
LCALL WRITE_1602COM
MOV A,B
ADD A,#30H
LCALL WRITE_1602DAT
RET
DELAY1: ;延时1
MOV 30H,#20
DJNZ 30H,$
RET
DELAY2: ;延时2
MOV 30H,#50
DELAY20:
MOV 31H,#50
DJNZ 31H,$
DJNZ 30H,DELAY20
RET
;//定时器0中断函数
TIME0:
PUSH PSW
PUSH ACC
SETB TIME_FULL
POP ACC
POP PSW
RETI
TIME1:
PUSH PSW
PUSH ACC
MOV TH1,#(65536-50000)/256; //50MS
MOV TL1,#(65536-50000)MOD 256;
INC TX
MOV A,TX
CJNE A,#8,TIME10 //400MS测量一次
MOV TX,#0
SETB TRIG
LCALL DELAY1
CLR TRIG
TIME10:
POP ACC
POP PSW
RETI
; 功能：双字节十六进制整数转换成双字节ＢＣＤ码整数
; 入口条件：待转换的双字节十六进制整数在R6、R7中。
; 出口信息：转换后的三字节ＢＣＤ码整数在R3、R4、R5中。
HB2:
CLR A ;ＢＣＤ码初始化
MOV R3,A
MOV R4,A
MOV R5,A
MOV R2,#10H ;转换双字节十六进制整数
HB3:
MOV A,R7 ;从高端移出待转换数的一位到CY中
RLC A
MOV R7,A
MOV A,R6
RLC A
MOV R6,A
MOV A,R5 ;ＢＣＤ码带进位自身相加,相当于乘２
ADDC A,R5
DA A ;十进制调整
MOV R5,A
MOV A,R4
ADDC A,R4
DA A
MOV R4,A
MOV A,R3
ADDC A,R3
MOV R3,A ;双字节十六进制数的万位数不超过6,不用调整
DJNZ R2,HB3 ;处理完16bit
RET
CODE_PRINT1:
DB " Now S: cm",0
CODE_PRINT2:
DB "Set H L ",0
CODE_PRINT3:
DB "Err",0
END

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