led節(jié)能燈驅(qū)動(dòng)電路畢業(yè)論文-資料下載頁
2025-06-28 08:13本頁面
【正文】 INCLUDE 。將頭文件含入源文件中。COUNT0 EQU 0x20 。計(jì)數(shù)變量寄存器定義COUNT1 EQU 0x21 。TMR0A EQU 0BBH 。TMR0寄存器初始值定義TMR1LB EQU 9CH 。TMR1低字節(jié)寄存器初始值定義TMR1HB EQU 0FFH 。TMR1高字節(jié)寄存器初始值定義RA0 EQU 0 。I/O端口位定義RA1 EQU 1 。RA4 EQU 4 。RC4 EQU 4 。ORG 0 。設(shè)置復(fù)位向量地址NOP 。用ICD調(diào)試時(shí)需要加入NOP指令GOTO INITIALIZE 。跳轉(zhuǎn)到初始化程序入口處ORG 0x04 。中斷矢量。INTBCF STATUS,RP0 。Bank 0BTFSC PIR1,TMR1IF 。TMR1溢出中斷否？GOTO TMR1INT 。是！轉(zhuǎn)入TMR1中斷處理子程序BTFSC PIR1,TMR2IF 。否！TMR2溢出中斷否？GOTO TMR2INT 。是！轉(zhuǎn)入TRM2中斷處理子程序TMR0INTBCF INTCON,T0IF 。清除TMR0中斷標(biāo)志位BCF INTCON,T0IE 。關(guān)閉TMR0計(jì)數(shù)器INCF COUNT0,1 。COUNT0+1MOVLW TMR0A 。TMRO重新賦初值MOVWF TMR0BSF INTCON,T0IE 。重新啟動(dòng)TMR0RETFIE 。返回TMR1INTBCF PIR1,0 。清除TMR1中斷標(biāo)志位BCF T1CON,0 。關(guān)閉TMR1計(jì)數(shù)器INCF COUNT1,1 。COUNT1+1MOVLW TMR1LB 。TMR1低字節(jié)賦初值MOVWF TMR1L 。MOVLW TMR1HB 。TMR1高字節(jié)賦初值MOVWF TMR1H 。BSF T1CON,0 。重新啟動(dòng)TMR1RETFIE 。返回TMR2INTBCF PIR1,TMR2IF 。清除TMR2中斷標(biāo)志位RETFIE 。返回。INITIALIZE。*****Timer0初始化,*****BCF STATUS,RP0 。Bank 0CLRF TMR0 。清TMR0BSF STATUS,RP0 。Bank 1MOVLW 0C4H 。將預(yù)分頻器分配給Timer0模塊，MOVWF OPTION_REG 。預(yù)分頻比設(shè)為1:32BCF STATUS,RP0 。Bank 0MOVLW TMR0A 。TMRO賦初值MOVWF TMR0。*****Timer1初始化,定時(shí)50us*****BCF STATUS,RP0 。Bank 0CLRF TMR1L 。CLRF TMR1H 。MOVLW 04H 。設(shè)置控制寄存器內(nèi)容：MOVWF T1CON 。暫不打開TMR1,預(yù)分頻比1:1MOVLW TMR1LB 。TMR1低字節(jié)賦初值MOVWF TMR1L 。MOVLW TMR1HB 。TMR1高字節(jié)賦初值MOVWF TMR1H 。BSF STATUS,RP0 。Bank 1BSF PIE1,0 。開放TMR1中斷使能位。*****PWM模式初始化，周期1ms，占空比50%*****BCF STATUS,RP0 。Bank 0CLRF CCP1CON 。CCP模塊關(guān)閉CLRF TMR2 。清Timer2BSF STATUS,RP0 。Bank 1MOVLW 7CH 。PWM周期設(shè)置MOVWF PR2 。BCF STATUS,RP0 。Bank 0MOVLW 2CH 。PWM模式選擇，占空比低兩位設(shè)置MOVWF CCP1CON 。MOVLW 3EH 。占空比高8位設(shè)置MOVWF CCPR1L 。MOVLW 02H 。TMR2設(shè)定：后分頻比1:1,MOVWF T2CON 。預(yù)分頻比1:16,暫時(shí)不開啟BSF STATUS,RP0 。Bank 1BSF PIE1,1 。開放TMR2中斷使能位CLRF PIR1 。清外設(shè)中斷標(biāo)志位。*****PORTA初始化*****BCF STATUS,RP0 。Bank 0CLRF PORTA 。PORTA輸出數(shù)據(jù)寄存器清零MOVLW 07H 。RA2:0配置為數(shù)字I/OMOVWF CMCON0 。BSF STATUS,RP0 。Bank 1CLRF ANSEL 。引腳被分配給端口MOVLW 0CH 。RA3:2設(shè)置為輸入MOVWF TRISA 。RA5:4,1:0設(shè)置為輸出。*****PORTC初始化*****BCF STATUS,RP0 。Bank 0CLRF PORTC 。PORTC輸出數(shù)據(jù)寄存器清零MOVLW 07h 。Set RC4,1:0 to digital I/OMOVWF CMCON0 。BSF STATUS,RP0 。Bank 1CLRF ANSEL 。引腳被分配給端口MOVLW 0Ch 。RC3:2設(shè)置為輸入MOVWF TRISC 。RC5:4,1:0設(shè)置為輸出。MAINBCF STATUS,RP0 。Bank 0CLRWDT 。清零看門狗定時(shí)器CLRF INTCON 。關(guān)閉所有中斷BSF STATUS,RP0 。Bank 1MOVLW 77H 。選用振蕩頻率為8MHZ的內(nèi)部時(shí)鐘MOVWF OSCCON 。BSF STATUS,C 。計(jì)數(shù)標(biāo)志檢測位設(shè)置BCF STATUS,RP0 。Bank 0CLRF COUNT0 。計(jì)數(shù)變量寄存器清零CLRF COUNT1 。BSF PORTA,RA0 。RA0置1BSF PORTA,RA1 。RA1置1BSF PORTA,RA4 。RA4置1BSF PORTC,RC4 。RC4置1MOVLW 0C0H 。使能全局中斷MOVWF INTCON 。LOOPBSF INTCON,T0IE 。啟動(dòng)TMR0BSF T1CON,0 。啟動(dòng)TMR1BSF T2CON,2 。啟動(dòng)TMR2CHECK0BTFSC COUNT0,0 。檢查COUNT0是否等于1GOTO RESET 。是！跳轉(zhuǎn)BTFSS COUNT0,2 。否！檢查COUNT0是否等于4GOTO CHECK1 。否！跳轉(zhuǎn)CLRF COUNT0 。是！COUNT0清零BSF PORTA,RA0 。PORTA的三個(gè)I/O口重新置1BSF PORTA,RA1 。BSF PORTA,RA4 。GOTO CHECK1 。轉(zhuǎn)向COUNT1檢查RESETBCF PORTA,RA0 。PORTA的三個(gè)I/O口清零BCF PORTA,RA1 。BCF PORTA,RA4 。CHECK1MOVF COUNT1,0 。將COUNT1中的值存入W寄存器SUBLW 02H 。檢查COUNT1是否等于3BTFSC STATUS,0 。GOTO NEXT 。否！跳轉(zhuǎn)BCF PORTC,RC4 。是！RC4清零BSF STATUS,0 。進(jìn)/借位標(biāo)志位還原MOVF COUNT1,0 。將COUNT1中的值存入W寄存器SUBLW 09H 。檢查COUNT1是否等于10BTFSC STATUS,0 。GOTO NEXT 。否！跳轉(zhuǎn)CLRF COUNT1 。是！COUNT1清零BSF PORTC,RC4 。RC4重新置1BSF STATUS,0 。進(jìn)/借位標(biāo)志位還原NEXTGOTO CHECK0 。等待各定時(shí)器超時(shí)溢出中斷。END
黨政相關(guān)相關(guān)推薦
鄂ICP備17016276號(hào)-1