PIC单片机在ICD做lcd显示时钟演示程序
 
;*************************************************
;* CLKTEST.ASM *
;*-----------------------------------------------*
;PIC单片机 www.pic16.com
;*-----------------------------------------------*
;*************************************************
;* ICDDEMO教学实验板 lcd显示时钟演示程序 *
;*************************************************
include <p16f877.inc>
;*----
; 定义 LCD数据& 控制I/O口
LCD_DATA equ PORTB
LCD_CNTL1 equ PORTB
LCD_CNTL2 equ PORTA

; 定义 LCD控制相应的I/O引脚
RS equ 1
E equ 5

; LCD 模块命令
DISP_ON EQU 0x00C ; 开显示
DISP_ON_C EQU 0x00E ; 开显示, 开指针
DISP_ON_B EQU 0x00F ; 开显示, 开指针,开闪烁
DISP_OFF EQU 0x008 ; 关显示
CLR_DISP EQU 0x001 ; 清显示的操作数
ENTRY_INC EQU 0x006 ; 操作数
ENTRY_INC_S EQU 0x007 ; 操作数
ENTRY_DEC EQU 0x004 ; 操作数
ENTRY_DEC_S EQU 0x005 ; 操作数
DD_RAM_ADDR EQU 0x080 ; 初始化第一行显示的操作数
DD_RAM_UL EQU 0x0c0 ; 初始化第二行显示的操作数

; 设置显示相关寄存器
Byte EQU 20H
Count EQU 21H
Count1 EQU 22H
Count2 EQU 23H
LCD_DATA1 EQU 24H
PORTDB EQU 25H
Temp EQU 26H
TempH EQU 27H
TempL EQU 28H
INTSIG EQU 29H
RTCCSIG1 EQU 2AH
RTCCSIG EQU 2BH
ALRSIG EQU 2CH
Hour EQU 2DH
HourH EQU 2EH
HourL EQU 2FH
HourL1 EQU 30H
HourH1 EQU 31H
Mins EQU 32H
Mins1 EQU 33H
MinsH EQU 34H
MinsL EQU 35H
MinsH1 EQU 36H
MinsL1 EQU 37H
Secs EQU 38H
SecsH EQU 39H
SecsL EQU 3AH
ALRH1 EQU 3BH
ALRM1 EQU 3CH
ALRH2 EQU 3DH
ALRM2 EQU 3EH
ALRH3 EQU 3FH
ALRM3 EQU 40H
_WREG EQU 41H
_STATUS EQU 42H
Hour1 EQU 43H
ADRESB EQU 44H
BKM EQU 45H
;*----

org 0
nop
goto start
org 4
goto ISR

org 10

CalTable
bcf STATUS,RP0
bcf PCLATH,0
movlw 0x66 ; 进行校准处理
subwf Temp,w ;
addwf PCL,f ; 将补偿结果与 PCL相加
dt 0,0,0,0,1,1,1,1,2,2,2,2,3,3,3,3,4,4,4,4,5,5,5
dt 6,6,6,7,7,7,8,8,8,9,9,0xa,0xa,0xb,0xb,0xc,0xc
dt 0xd,0xd,0xe,0xe,0xf,0xf,0xf,0x10,0x10,0x10
dt 0x11,0x11,0x12,0x12,0x12,0x13,0x13,0x14,0x14,0x14
dt 0x15,0x15,0x15,0x16,0x16,0x16,0x17,0x17,0x18,0x18
dt 0x19,0x19,0x1a,0x1a,0x1b,0x1b,0x1c,0x1c,0x1c
dt 0x1d,0x1d,0x1d,0x1e,0x1e,0x1f,0x1f,0x20,0x20
dt 0x21,0x21,0x22,0x22,0x23,0x23,0x24,0x24,0x25,0x25
dt 0x26,0x26,0x27,0x28,0x29,0x29,0x2a,0x2a,0x2b,0x2b
dt 0x2c,0x2d,0x2e,0x2f,0x30,0x32

start
call InitLCD
clrf RTCCSIG
clrf RTCCSIG1
clrf INTSIG
clrf Hour
clrf Hour1
clrf Mins
clrf Mins1
clrf Secs
clrf ALRSIG
movlw 20h
movwf BKM
movlw b'10001111'
movwf PORTDB
movlw 0ffh
movwf TMR0
movlw 00
movwf TMR1L
movlw 80h
movwf TMR1H
movlw b'00001111'
movwf T1CON
bsf STATUS,RP0
bsf PIE1,TMR1IE
bcf STATUS,RP0
movlw b'10111111'
OPTION
movlw b'11110000'
movwf INTCON
main
movlw 80h
call SendCmd
call DisplayTime ;显示时间
movlw 0c0h
call SendCmd
movlw 'H'
call putcLCD
movlw 'e'
call putcLCD
movlw 'l'
call putcLCD
movlw 'l'
call putcLCD
movlw 'o'
call putcLCD
movlw ' '
call putcLCD
movlw '!'
call putcLCD
movlw ' '
call putcLCD
movlw ':'
call putcLCD
movlw ')'
call putcLCD
movlw ' '
call putcLCD
movlw ' '
call putcLCD
call BkLight ;背光控制
call TempM ;显示温度
btfsc ALRSIG,1
call ALR1
btfsc ALRSIG,2
call ALR2
btfsc ALRSIG,3
call ALR3
bcf STATUS,RP0
bcf PCLATH,0
movf RTCCSIG,W
addwf PCL,1
goto main
goto RtccS1
goto RtccS2
goto Rtccs3
goto Rtccs4
clrf RTCCSIG
clrf RTCCSIG1
goto main
;*=====
ALR1 bcf STATUS,RP0
movf Hour,W
xorwf ALRH1,W
btfss STATUS,Z
goto ALREND
movf Mins,W
xorwf ALRM1,W
btfss STATUS,Z
goto ALREND
bsf STATUS,RP0
clrf TRISD
bcf STATUS,RP0
bcf STATUS,C
rlf PORTDB,1
btfsc STATUS,C
bsf PORTDB,0
movf PORTDB,W
movwf PORTD
return
;*---
ALR2 bcf STATUS,RP0
movf Hour,W
xorwf ALRH2,W
btfss STATUS,Z
goto ALREND
movf Mins,W
xorwf ALRM2,W
btfss STATUS,Z
goto ALREND
bsf STATUS,RP0
clrf TRISD
bcf STATUS,RP0
bcf STATUS,C
rlf PORTDB,1
btfsc STATUS,C
bsf PORTDB,0
movf PORTDB,W
movwf PORTD
return
;*----
ALR3 bcf STATUS,RP0
movf Hour,W
xorwf ALRH3,W
btfss STATUS,Z
goto ALREND
movf Mins,W
xorwf ALRM3,W
btfss STATUS,Z
goto ALREND
bsf STATUS,RP0
clrf TRISD
bcf STATUS,RP0
bcf STATUS,C
rlf PORTDB,1
btfsc STATUS,C
bsf PORTDB,0
movf PORTDB,W
movwf PORTD
return
;*---
ALREND
bsf STATUS,RP0
movlw 0ffh
movwf TRISD
return
;*=====
RtccS1
movlw 80h
call SendCmd
call DisplayTime
call LongDelay
movlw 0c0h
call SendCmd ;line2, 00
movlw 'S'
call putcLCD
movlw 'e'
call putcLCD
movlw 't'
call putcLCD
movlw ' '
call putcLCD
movlw 'T'
call putcLCD
movlw 'i'
call putcLCD
movlw 'm'
call putcLCD
movlw 'e'
call putcLCD ;show "Set Time"
movlw ' '
call putcLCD
movlw ' '
call putcLCD
movlw ' '
call putcLCD
movlw ' '
call putcLCD
bsf PCLATH,0
movf RTCCSIG1,W
addwf PCL,1
goto SetHour
goto SetMins
clrf INTSIG
incf RTCCSIG
clrf RTCCSIG1
goto main
;*----
SetHour
movlw 80h
call Selshow
movlw d'24'
subwf INTSIG,W
btfsc STATUS,C
goto $+4
movf INTSIG,w
movwf Hour
goto RtccS1
clrf INTSIG
movwf Hour
goto RtccS1
;*----
SetMins
movlw 83h
call Selshow
movlw d'60'
subwf INTSIG,W
btfsc STATUS,C
goto $+4
movf INTSIG,w
movwf Mins
goto RtccS1
clrf INTSIG
movwf Mins
goto RtccS1
;*=====
RtccS2
bcf STATUS,RP0
movlw 0c0h
call SendCmd
call Alarm
movlw '1'
call putcLCD
movlw ' '
call putcLCD
S2 movlw 80h
call SendCmd
call DisplayTime
call DispTime
call LongDelay
bsf PCLATH,0
movf RTCCSIG1,W
addwf PCL,1
goto SetAlH2
goto SetAlM2
movf Hour1,w
movwf ALRH1
movf Mins1,w
movwf ALRM1
clrf INTSIG
clrf RTCCSIG1
incf RTCCSIG
goto main
;*---
SetAlH2
movlw 0c7h
call Selshow
movf INTSIG,W
btfss STATUS,Z
bsf ALRSIG,1
movf INTSIG,W
movwf Hour1
movlw d'24'
subwf Hour1,W
btfss STATUS,C
goto S2
clrf INTSIG
clrf Hour1
goto S2
SetAlM2
movlw 0cah
call Selshow
movf INTSIG,W
btfss STATUS,Z
bsf ALRSIG,1
movf INTSIG,W
movwf Mins1
movlw d'60'
subwf Mins1,W
btfss STATUS,C
goto S2
clrf INTSIG
clrf Mins1
goto S2
;*----
Alarm movlw 'A'
call putcLCD
movlw 'l'
call putcLCD
movlw 'a'
call putcLCD ;
movlw 'r'
call putcLCD
movlw 'm'
call putcLCD ;
return
;*----
Selshow
call SendCmd
movlw ' '
call putcLCD
movlw ' '
call putcLCD
call LongDelay
return
;*=====
Rtccs3
bcf STATUS,RP0
movlw 0c0h
call SendCmd
call Alarm
movlw '2'
call putcLCD
movlw ' '
call putcLCD
S3 movlw 80h
call SendCmd
call DisplayTime
call DispTime
call LongDelay
bsf PCLATH,0
movf RTCCSIG1,w
addwf PCL,1
goto SetAlH3
goto SetAlM3
movf Hour1,w
movwf ALRH2
movf Mins1,w
movwf ALRM2
clrf INTSIG
clrf RTCCSIG1
incf RTCCSIG
goto main
;*---
SetAlH3
movlw 0c7h
call Selshow
movf INTSIG,W
btfss STATUS,Z
bsf ALRSIG,2
movf INTSIG,W
movwf Hour1
movlw d'24'
subwf Hour1,W
btfss STATUS,C
goto S3
clrf INTSIG
clrf Hour1
goto S3
SetAlM3
movlw 0cah
call Selshow
movf INTSIG,W
btfss STATUS,Z
bsf ALRSIG,1
movf INTSIG,W
movwf Mins1
movlw d'60'
subwf Mins1,W
btfss STATUS,C
goto S3
clrf INTSIG
clrf Mins1
goto S3
;*=====
Rtccs4
movlw 80h
call SendCmd
call DisplayTime
bcf STATUS,RP0
movlw 0c0h
call SendCmd
call Alarm
movlw '3'
call putcLCD
movlw ' '
call putcLCD
S4 call DispTime
call LongDelay
bsf PCLATH,0
movf RTCCSIG1,w
addwf PCL,1
goto SetAlH4
goto SetAlM4
movf Hour1,w
movwf ALRH3
movf Mins1,w
movwf ALRM3
clrf INTSIG
clrf RTCCSIG1
incf RTCCSIG
goto main
;*---
SetAlH4
movlw 0c7h
call Selshow
movf INTSIG,W
btfss STATUS,Z
bsf ALRSIG,3
movf INTSIG,W
movwf Hour1
movlw d'24'
subwf Hour1,W
btfss STATUS,C
goto S4
clrf INTSIG
clrf Hour1
goto S4
SetAlM4
movlw 0cah
call Selshow
movf INTSIG,W
btfss STATUS,Z
bsf ALRSIG,1
movf INTSIG,W
movwf Mins1
movlw d'60'
subwf Mins1,W
btfss STATUS,C
goto S4
clrf INTSIG
clrf Mins1
goto S4
;*=====
ISR
Push
movwf _WREG ; 存 WREG状态
swapf STATUS,W ; 存 STATUS
movwf _STATUS
;*----
bcf STATUS,RP0
btfsc PIR1,TMR1IF
call TimeAdj
btfsc INTCON,INTF
call IntDeal
btfsc INTCON,T0IF
call RtccDeal

;*----
Pop
swapf _STATUS,W ; Restore STATUS
movwf STATUS
swapf _WREG,F ; Restore WREG w/o
swapf _WREG,W ; affecting STATUS
retfie
;*=====
TimeAdj
bcf STATUS,RP0
bcf PIR1,TMR1IF
movlw 00h
movwf TMR1L
movlw 80h
movwf TMR1H
incf Secs,1
movlw d'60'
xorwf Secs,W
btfss STATUS,Z
goto TE
clrf Secs
incf Mins,1
movlw d'60'
xorwf Mins,W
btfss STATUS,Z
goto TE
clrf Mins
incf Hour
movlw d'24'
xorwf Hour,W
btfss STATUS,Z
goto TE
clrf Hour
TE
return
;*=====
IntDeal
bcf INTCON,INTF
bsf PORTB,0
btfsc PORTB,0 ;\
goto $+5 ; \
call Delay
bsf PORTB,0 ; 按键去抖动
btfsc PORTB,0
goto $+2 ; /
incf INTSIG
return
;*=====
RtccDeal
bcf STATUS,RP0
movlw 0ffh ;
movwf TMR0
bcf INTCON,T0IF
bsf PORTA,4
btfsc PORTA,4 ;\
goto RtcWr ; \
call Delay
bsf PORTA,4 ; 按键去抖动
btfsc PORTB,4
goto RtcWr ; /
movf RTCCSIG,W
sublw 04h
btfss STATUS,C
goto WRONG
movf RTCCSIG1,W
sublw 03h
btfss STATUS,C
goto WRONG
movf RTCCSIG,W
addwf RTCCSIG1,W
btfsc STATUS,Z
goto $+3
incf RTCCSIG1
goto RtcWr
incf RTCCSIG
goto RtcWr

WRONG
clrf RTCCSIG
clrf RTCCSIG1
RtcWr return
;*=====
BkLight
bsf STATUS,RP0
bcf ADCON1,ADFM ;ADRESH all 8-bit,H
bcf STATUS,RP0
movlw b'01010001'
movwf ADCON0 ;select AD2,Fosc/8
decfsz BKM
goto $-1
bsf ADCON0,GO
btfss PIR1,ADIF
goto $-1
bcf PIR1,ADIF
;READ ADRES---
movf ADRESH,W
movwf ADRESB
bsf STATUS,RP0
bcf TRISE,0 ;SELECT RE0 OUTPUT
bcf STATUS,RP0
movlw b'10000000' ;critical value of lightness
subwf ADRESB,W
btfss STATUS,C
goto $+4 ;c=0,ADRESB<critical
bcf STATUS,RP0
bsf PORTE,0 ;c=1,backlight on
goto $+3
bcf STATUS,RP0
bcf PORTE,0
movlw 20h
movwf BKM
return
;*=====
TempM ;temprature measure
bsf STATUS,RP0
bcf ADCON1,ADFM ;ADRESH all 8-bit
bcf STATUS,RP0
movlw b'01001001' ;select AD1,FOSC/8
movwf ADCON0
decfsz BKM
goto $-1
bsf ADCON0,GO
btfss PIR1,ADIF
goto $-1
bcf PIR1,ADIF
;bsf STATUS,RP0
movf ADRESH,W
;bcf STATUS,RP0
movwf Temp
call CalTable
movwf Temp
call Bin2BCDT ; 进行BCD码调整
movlw 08ah ; 从第一行的第0A个位置开始
call SendCmd
movf TempH,W ; 显示温度
call putcLCD
movf TempL,W
call putcLCD
movlw 'C' ; 显示“C”(表示摄氏度)
call putcLCD
movlw 20h
movwf BKM
return
;************************************************
;* Bin2BCDT - 将 Temp 寄存器内的二进制数转 *
;* 换为相应的 ASCII 码并存为 TempH:TempL 的形式 *
;************************************************
Bin2BCDT
bcf STATUS,RP0
clrf TempH ; Initialize variables
movf Temp,W
movwf TempL
Ttenth ; Subtract 10 from low variable
movlw .10 ; until result is < 0. On each
subwf TempL,W ; subtraction, increment the
btfss STATUS,C ; temperature high byte.
goto Over0
movwf TempL
incf TempH,F
goto Ttenth
Over0
movlw 0x30 ; Make decimal ASCII by adding
addwf TempH,F ; '0' to high and low byte
addwf TempL,F
return
;*************************************************
;* DisplayTime - 将显示指针移至第一行,调用Bin2BCD*
;* 子程序将Secs 和 Mins寄存器内的数据转换为相应的*
;* ASCII 码, 然后送 LCD显示. *
;*************************************************
DisplayTime
bcf STATUS,RP0
call Bin2BCD ; 调用二进制与bcd码转换子程序
movf HourH,W ; 显示小时高位
call putcLCD ;
movf HourL,W ; 显示小时低位
call putcLCD ;
movlw ':'
call putcLCD ; 显示 ':'
movf MinsH,W ; 显示分钟高位
call putcLCD ;
movf MinsL,W ; 显示分钟低位
call putcLCD ;
movlw ':' ; 显示 ':'
call putcLCD
movf SecsH,W ; 显示秒钟高位
call putcLCD ;
movf SecsL,W ; 显示秒钟低位
call putcLCD ;
return
;************************************************
;* Bin2BCD - 将 Secs & Mins 寄存器内的二进制数转*
;* 换为相应的 ASCII 码并存为 SecsH:SecsL 及 *
;* MinsH:MinsL,HourH:HourL的形式. *
;************************************************
Bin2BCD
bcf STATUS,RP0
clrf HourH ; 初始化变量
movf Hour,W ; 转换“时”
movwf HourL
Hourth ; Loop to subtract 10
movlw .10 ; from low byte and
subwf HourL,W ; increment high byte
btfss STATUS,C ; while low byte is > 0
goto Next
movwf HourL
incf HourH,F
goto Hourth
Next
clrf MinsH ; 初始化变量
movf Mins,W ; 转换“分”
movwf MinsL
Mtenth ; Loop to subtract 10
movlw .10 ; from low byte and
subwf MinsL,W ; increment high byte
btfss STATUS,C ; while low byte is > 0
goto Next1
movwf MinsL
incf MinsH,F
goto Mtenth
Next1
clrf SecsH ; 初始化变量
movf Secs,W ; 转换“秒”
movwf SecsL
Stenth ; Loop to subtract 10
movlw .10 ; from low byte and
subwf SecsL,W ; increment high byte
btfss STATUS,C ; while low byte is > 0
goto Over
movwf SecsL
incf SecsH,F
goto Stenth
Over
movlw 0x30 ;
addwf HourH,F ;
addwf HourL,F ; Add 0x30 ('0') to all
addwf MinsH,F ; variables to convert
addwf MinsL,F ; a number 0 - 9 to an
addwf SecsH,F ; ASCII equivalent
addwf SecsL,F ; '0' to '9'
return
;*====
DispTime
bcf STATUS,RP0
movlw 0c7h
call SendCmd
call Bin2BCa ; 调用二进制与bcd码转换子程序
movf HourH1,W ; 显示小时高位
call putcLCD ;
movf HourL1,W ; 显示小时低位
call putcLCD ;
movlw ':' ; 显示 ':'
call putcLCD
movf MinsH1,W ; 显示分钟高位
call putcLCD ;
movf MinsL1,W ; 显示分钟低位
call putcLCD ;
return
;*----
Bin2BCa
bcf STATUS,RP0
clrf HourH1 ; 初始化变量
movf Hour1,W ; 转换“时”
movwf HourL1
Hourth1 ; Loop to subtract 10
movlw .10 ; from low byte and
subwf HourL1,W ; increment high byte
btfss STATUS,C ; while low byte is > 0
goto Nexta
movwf HourL1
incf HourH1,F
goto Hourth1
Nexta
clrf MinsH1 ; 初始化变量
movf Mins1,W ; 转换“分”
movwf MinsL1
Mtenth1 ; Loop to subtract 10
movlw .10 ; from low byte and
subwf MinsL1,W ; increment high byte
btfss STATUS,C ; while low byte is > 0
goto Over1
movwf MinsL1
incf MinsH1,F
goto Mtenth1
Over1
movlw 0x30 ;
addwf HourH1,F ;
addwf HourL1,F ; Add 0x30 ('0') to all
addwf MinsH1,F ; variables to convert
addwf MinsL1,F ; a number 0 - 9 to an
return ; ASCII equivalent
;*******************************************************************
;* LCD 模块子程序 *
;*******************************************************************
;InitLCD——初始化LCD模块 *
;*******************************************************************
InitLCD
bcf STATUS,RP0 ; Bank 0
bcf STATUS,RP1
clrf LCD_DATA ; 清 LCD 数据 & 控制位
bsf STATUS,RP0 ; Bank 1
movlw 0xc1 ; 设置RB1~RB5为输出
movwf LCD_DATA
bcf TRISA,5

bcf STATUS,RP0 ;
movlw 0x00 ;
movwf LCD_DATA
bsf LCD_CNTL2, E
bcf LCD_CNTL2, E

movlw 0x08 ;
movwf LCD_DATA
bsf LCD_CNTL2, E
bcf LCD_CNTL2, E
call LongDelay
call LongDelay

movlw b'00101000'
call SendCmd
movlw DISP_ON ; 开显示
call SendCmd
movlw ENTRY_INC ; 设置指针移动方式
call SendCmd
movlw DD_RAM_ADDR ; 设置起始地址
call SendCmd

InitLCDEnd ;
bcf STATUS,RP0 ;
movlw CLR_DISP ;
call SendCmd
return

;*******************************************************************
;*putcLCD—— 将字符数据送入 LCD *
;* 本程序将字符数据分成了高半字节和低半字节分别输入 *
;* 先送入的是高半字节 *
;*******************************************************************
putcLCD
bcf STATUS,RP0
movwf Byte ; 存 WREG 到 Byte 寄存器
swapf Byte,W ; 写入高半字节
movwf LCD_DATA1
rlf LCD_DATA1,1
rlf LCD_DATA1,1
movlw 0x3c
andwf LCD_DATA1,1
movf LCD_DATA1,w
movwf LCD_DATA
bsf LCD_CNTL1, RS ; 设置为送数据模式
bsf LCD_CNTL2, E ; 发送数据信号
bcf LCD_CNTL2, E

movf Byte,W ; 接着送低半字节
movwf LCD_DATA1
rlf LCD_DATA1,1
rlf LCD_DATA1,1
movlw 0x3c
andwf LCD_DATA1,1
movf LCD_DATA1,w
movwf LCD_DATA
bsf LCD_CNTL1, RS ; 设置为送数据模式
bsf LCD_CNTL2, E ; 发送数据信号
bcf LCD_CNTL2, E
call Delay
return

;*******************************************************************
;* SendCmd - 送命令到 LCD *
;* 本程序将命令数据分成了高半字节和低半字节分别输入 *
;* 先送入的是高半字节 *
;*******************************************************************
SendCmd
bcf STATUS,RP0
movwf Byte ; 存 WREG 到 Byte 寄存器
swapf Byte,W ; 送入命令的高字节
movwf LCD_DATA1
rlf LCD_DATA1,1
rlf LCD_DATA1,1
movlw 0x3c
andwf LCD_DATA1,1
movf LCD_DATA1,w
movwf LCD_DATA
bcf LCD_CNTL1,RS ; 设置为送命令模式
bsf LCD_CNTL2,E ; 发送数据信号
bcf LCD_CNTL2,E
movf Byte,W ; 接着送命令的低字节

movwf LCD_DATA1
rlf LCD_DATA1,1
rlf LCD_DATA1,1
movlw 0x3c
andwf LCD_DATA1,1
movf LCD_DATA1,w
movwf LCD_DATA
bcf LCD_CNTL1,RS ; 设置为送命令模式
bsf LCD_CNTL2,E ; 发送数据信号
bcf LCD_CNTL2,E
call Delay
return
;*******************************************************************
;* Delay - 延时子程序 *
;*******************************************************************
Delay ; call指令占用2个指令周期
bcf STATUS,RP0
clrf Count ; 清 Count占用1个指令周期
Dloop
decfsz Count,f ; 这两行指令将延时
goto Dloop ; (256 * 3) -1 个指令周期
return ; return占用2个指令周期

;*******************************************************************
;* LongDelay - 长延时子程序 *
;*******************************************************************
LongDelay
bcf STATUS,RP0
clrf Count
clrf Count1
movlw 0x03
movwf Count2
LDloop
decfsz Count,f
goto LDloop
decfsz Count1,f
goto LDloop
decfsz Count2,f
goto LDloop
return
;*------
END

返回


-------------PIC单片机 www.pic16.com-----------