总是出错,高手指点指点...
这是一个温度报警器,我想改他的上限为30,下限为20.我是把MOV H_TEMP,#153 改为:#30
MOV L_TEMP,#77 改为:#20
但总是出错,高手指点指点...
LED_0 EQU 30H
LED_1 EQU 31H
LED_2 EQU 32H
ADC EQU 35H
TCNTA EQU 36H
TCNTB EQU 37H
H_TEMP EQU 38H ;温度上限
L_TEMP EQU 39H ;温度下限
FLAG BIT 00H
H_ALM BIT P3.0
L_ALM BIT P3.1
SOUND BIT P3.7
CLOCK BIT P2.4
ST BIT P2.5
EOC BIT P2.6
OE BIT P2.7
ORG 00H
SJMP START
ORG 0BH
LJMP INT_T0
ORG 1BH
LJMP INT_T1
START: MOV LED_0,#00H
MOV LED_1,#00H
MOV LED_2,#00H
MOV DPTR,#TABLE
MOV H_TEMP,#153
MOV L_TEMP,#77
MOV TMOD,#12H
MOV TH0,#245
MOV TL0,#0
MOV TH1,#(65536-1000)/256
MOV TL1,#(65536-1000)MOD 256
MOV IE,#8aH
CLR C
SETB TR0 ;为ADC0808提供时钟
WAIT: SETB H_ALM
SETB L_ALM
CLR ST
SETB ST
CLR ST ;启动转换
JNB EOC,$
SETB OE
MOV ADC,P1 ;读取AD转换结果
CLR OE
MOV A,ADC
SUBB A,#77 ;判断是否低于下限
JC LALM
MOV A,H_TEMP
MOV R0,ADC
SUBB A,R0 ;判断是否高于上限
JC HALM
CLR TR1
LJMP PROC
LALM: ;低温报警
CLR L_ALM
SETB TR1
CLR FLAG
LJMP PROC
HALM: ;高温报警
CLR H_ALM
SETB TR1
SETB FLAG
LJMP PROC
PROC: MOV A,ADC ;数值转换
MOV B,#100
DIV AB
MOV LED_2,A
MOV A,B
MOV B,#10
DIV AB
MOV LED_1,A
MOV LED_0,B
LCALL DISP
SJMP WAIT
INT_T0: CPL CLOCK ;提供ADC0808时钟
RETI
INT_T1: MOV TH1,#(65536-1000)/256
MOV TL1,#(65536-1000)MOD 256
CPL SOUND
INC TCNTA
MOV A,TCNTA
JB FLAG,I1 ;判断是高温警报还是低温警报
CJNE A,#30,RETUNE ;低温警报声
SJMP I2
I1: CJNE A,#20,RETUNE ;高温警报声
I2: MOV TCNTA,#0
INC TCNTB
MOV A,TCNTB
CJNE A,#25,RETUNE
MOV TCNTA,#0
MOV TCNTB,#0
DELAY2: MOV R5,#20
D2: MOV R6,#20
D3: MOV R7,#250
DJNZ R7,$
DJNZ R6,D3
DJNZ R5,D2
RET
TABLE: DB 3FH,06H,5BH,4FH,66H
DB 6DH,7DH,07H,7FH,6FH
END
[[it] 本帖最后由 sweetno2 于 2008-11-5 18:34 编辑 [/it]]