atmega128單片機系列例程

1、ATMEGA128相關(guān)例程說明：本文檔由滄海一聲笑原創(chuàng)由卩箱：H己學(xué)av單片機已經(jīng)有相當一段時間了，一開始用的是atmegal2&覺得不是很好用。丁是H己去買了一塊16L的芯片，覺得還彳亍。一開始用的是ICCAVR.應(yīng)為它用起來比較簡單，不像winavr那樣，要寫個Makefie，比較的麻煩，但iccavr的缺點是太過丁簡麗，調(diào)試程序時，感覺不是很好。后來經(jīng)同學(xué)介紹，用起了winavr,其實也是比較的簡單，只不過要加一個makefile而已,其實makefile可以用軟件自帶的組建H動生成，只需修改幾個參數(shù)就可以用。后來又用起了codevisionavr,雖然不太習慣，也談不上不好用.需要注意

2、的是，三個不同的軟件所帶的同文件不一樣oiccavr是ioml28v.h（姑且以128為例）,winavr是avr/io.h,不過makefile中要設(shè)置芯片為atmegal28.ifijcvavr則是megal28.ho記得一開始的時候，我對這些不同的同文件不是很理解，是從一個學(xué)長那里了解到，才弄明白的。其實前兩個軟件只需把頭文件稍微改一下基本上可以通用。而最后一個軟件的中斷的寫法似乎不太一樣，因而和錢兩個軟件的兼容性是最歪的?？傮w說winavr給人的感覺是比較專業(yè)lx流水燈嚴硬件環(huán)境：atmegal28開發(fā)板軟件環(huán)境：CodeVisionAVR-C*/#include#defineucha

3、runsignedchar#defineuintunsignedintucharent;voidtimerlnit()TCCR1B=OXOO；先停止定時器1TCNT1H=OXFO；設(shè)定定時器初值TCNT1L=OXBE；TCCR1A=OXOO；啟動定時器1TCCR1B=OXO5；使用1024分頻interruptTIM1_OVFvoidtlmerl_ovMsr(void)TCNT1H=OXFO；重載定時器初值TCNT1L=OXBE；DDRE|=12；PORTE|=12；DDRA=Oxff；PORTA=cnt;輸出led的值到端口Bcnt+;if(cnt=255)cnt=O;voidmain()/

4、DDRB=OXFF；SREG|=0X80；TIMSK=0X04；timerlnit();while(l);2、AD轉(zhuǎn)換+數(shù)碼管顯示/*/*ADC測試程序*/*l寸標器件：ATmegal28*/*晶振:RC8MHZ*/*編譯環(huán)境：ICCAVR7.13A*/*E-Mail: HYPERLINK mailto:*/*時間:2010年11月13日*/Aref接AVCC(+5V),采用Aref作參考電壓/*用數(shù)碼管顯示AD轉(zhuǎn)換的結(jié)果*/*/*包倉頭文件*/#include#include/*數(shù)碼管段碼表*/externconstunsignedchartab=0 x3f/0 x06z0 x5Bz0 x4

5、F/0 x66,0 x6Dz0 x7D,0 x07/0 x7F,0 x6F;/*全局變吊.*/unsignedintadc_rel=O;/*函數(shù)功能:ADC初始化函數(shù)入口參數(shù)：出口參數(shù)：*voidadcjnit(void)DDRF&=OXFE；/PORTFO設(shè)代為輸入，即作為ADCO口輸入模擬電壓PORTF&=OXFE；/PORTFO設(shè)置為輸入低電平ADCSRA=OxOO；關(guān)ADCADMUX=0X00；采用Aef作為參考電壓，ADC0單端輸入，右對齊ACSR=(1ACD)；ADCSRA=(1ADEN)|(1ADSC)|(1ADATE)|(1ADIE)|(1ADPS2)|(1ADPS1)；/AD

6、EN,啟動ADC；ADSC,ADC開始轉(zhuǎn)換：ADIE,ADC中斷使能：ADPSX,設(shè)世分頻因子64/*兩數(shù)功能:ADC中斷函數(shù)入口參數(shù)：出口參數(shù)：*/#pragmainterrupt_handleadc_is:iv_ADCvoidadcjsr(void)/intdata_h,data_l;/dataJ=ADCL;/data_h=ADCH;ADCSRA=0 x00；ADCSRA=(1ADEN)|(1ADSC)|(KOxlff)PORTA|=12；elsePORTA&=(1VV2);*/*函數(shù)功能:延時子程序入口參數(shù)：出口參數(shù)：*/voiddelay(void)inti;for(i=0;i1800

7、;i+);/*函數(shù)功能:顯示子程序入口參數(shù):k出口參數(shù)：*/voiddisplay(unsignedintk)發(fā)光:極管顯示初始化DDRE|=12；PORTE|=12；DDRA=OXFF；PORTA=k；#defineSS0#defineSCK1#defineMOSI2#defineMISO3#defineSS_H()PORTB|=(1SS)#defineSS_L()PORTB&=(1VVSS)#defineledO_en()(DDRB|=14;PORTB|=(14);開第一個數(shù)碼管的位選#defineledO_dis()DDRB|=14;PORTB&=(1VV4);關(guān)第一個數(shù)碼管的位選#de

8、fineledl.en()DDRB|=15;PORTB|=(15);#defineledl_dis()DDRB|=15;PORTB&=(1VV5);#defineIed2_en()DDRB|=16;PORTB|=(16);#defineIed2_dis()DDRB|=16;PORTB&=(lv6);#defineIed3_en()DDRB|=17;PORTB|=(17);#defineIed3_dis()DDRB|=17;PORTB&=(1VV7);#defineOE7#definepoint3#definedp7#include#inelude0丄2尼4567,8,9/a,b,c,dzejc

9、onstunsignedchartable=0 x3F,0 x06/0 x5B/0 x4Fz0 x66,0 x6D,0 x7D,0 x07,0 x7F,0 x6F,0 x77,0 x7C,0 x39,0 x5Ez0 x79,0 x71,0 x00；volatileunsignedcharled_buffer4;voiddelay_lus(void)/Ius延時函數(shù)asm(Hnopj;voiddelay_nus(unsignedintn)Nus延時函數(shù)unsignedinti=0;for(i=0;in;i+)delay_lus();voiddelay_lms(void)/1ms延時函數(shù)unsig

10、nedinti;for(i=0;i1140;i+);voiddelay_nms(unsignedintn)/Nms延時函數(shù)unsignedinti=0;for(i=0;in;i+)delay_lms();/*完成spi的初始化*/voidspijnit(void)DDRB|=(1MOSI)|(1SCK)|(1SS)；/SMOSI,SCK輸出SPCR=(1VVSPE)|(1VVMSTR)|(1VVSPRO)|(1VVSPR1)；使能SPI,主機模式/*spi主機傳送數(shù)據(jù)*/voidSPI_MasterTransmit(charData)/*啟動數(shù)據(jù)傳輸*/SPDR=Data;/*等待傳輸結(jié)束*/

11、while(!(SPSR&(1SPIF)/*完成對HC595的初始化*/voidHC_595nit(void)DDRC|=(1OE)；設(shè)置PORTC7為輸出PORTC&=(1VVOE)；輸出高電平，使能595PORTB=OXOF；同時打開四個數(shù)碼管的位選spinit();led_buffer0=16;初始化數(shù)碼管段碼led_bufferl=16;led_buffer2=16;led_buffer3=16;/*HC595完成傳送數(shù)據(jù)*/voidHC_595_OUT(unsignedchardata)SS_L()；SPI_MasterTransmit(data);SS_H()；voidleddis

12、_update(void)/*最低位數(shù)碼管，第四個數(shù)碼管*7if(point=O)HC_595_OUT(tableled_buffe3|(lvvdp);elseHC_595_OUT(tableled_buffe3);ledO_en();delay_nus(60);ledO_dis();if(point=l)HC_595_OUT(tableled_buffer2|(ldp);elseHC_595_OUT(tableled_buffer2);ledl_en();delay_nus(60);ledl_dis();if(point=2)HC_595_OUT(tableled_bufferl|(ldp)

13、;elseHC_595_OUT(tableled_bufferlJ);Ied2_en();delay_nus(60);Ied2_dis();/*最高位數(shù)碼管，第一個數(shù)碼管*/if(point=3)HC_595_OUT(tableled_buffer0|(l9999)HC_595_OUT(OxFF)；當計數(shù)大于9999時，四個數(shù)碼管同時輸出8PORTB|=(14)|(15)|(16)|(1999)led_bufferO=data/lOOO;led_bufferl=(data%1000)/100;led_buffer2=(data%100)/10;led_buffer3=data%10;leddi

14、s_update();elseif(data99)led_bufferO=data/lOOO;關(guān)閉最高位的那個數(shù)碼管led_bufferl=(data%1000)/100;led_buffer2=(data%100)/10;led_buffer3=data%10;leddis_update();elseif(data9)led_bufferO=data/lOOO;led_bufferl=16;led_buffer2=(data%100)/10;led_buffer3=data%10;leddis_update();elseled_buffer0=data/1000;led_bufferl=16

15、;led_buffer2=16;led_buffer3=data%10;leddis_update();volatileunsignedintcountnum=0;voidtimerlnit(void)TCCR1B=0 x00;/stopTCNT1H=0 x8F;/setupTCNT1L=0 x81；OCR1AH=0 x70；OCR1AL=0 x7F；OCR1BH=0 x70；OCR1BL=0 x7F；OCR1CH=0 x70；OCR1CL=0 x7F；ICR1H=0 x70；ICR1L=0 x7F；TCCR1A=0 x00；TCCR1B=0 x04;/startTimer#pragmaint

16、errupt_handletimerl_ovfjsr:15voidtimerl_ovfjsr(void)TCNT1H=0 x8F;/reloadcounterhighvalueTCNT1L=0 x81;/reloadcounterlowvaluecountnum+;if(countnum9999)countnum=0;voidinit_devices(void)CLI();/disableallinterruptstimerljnit();TIMSK=0 x04;/timerinterruptsourcesSEI();/re-enableinterrupts/*函數(shù)功能:主程序入口參數(shù)：出口參

17、數(shù)：*/voidmain(void)init_devices();HC_595nit();adcjnit();SEI()；/開全局中斷變戢display(O);while(l)delay();displayJed(adc_rel/1024.0*5*1000);3、對EEPROM進行讀寫操作/*文件：main.c用途:注意:內(nèi)部8M晶振*/#includenconfig.hH/*向EEPROM里而寫入數(shù)據(jù)輸入雖：地址.數(shù)據(jù)*/voidEEPROM_wite(unsignedintuiAddress.unsignedcharucData)while(EECR&(lEEWE);等待上一次寫操作結(jié)束E

18、EAR=uiAddress;地址EEDR=ucData;數(shù)據(jù)EECR|=(1EEMWE)；譽位EEMWE,主機寫使能EECR|=(1EEWE)；置位EEWE,寫使能，啟動寫操作/*從EEPROM指定的地址里面讀出相應(yīng)的數(shù)據(jù)*/unsignedcharEEPROM_read(unsignedintuiAddress)while(EECR&(lEEWE);等待上一次寫操作結(jié)束EEAR=uiAddress;設(shè)呂地址寄存器EECR|=(1EERE)；讀使能returnEEDR;返回讀入EEDR里而的數(shù)據(jù)voidmain(void)unsignedchartemp=123;unsignedchardat

19、a;HC_595Jnit();EEPROM_wnte(0 x01ztemp);data=EEPROM_read(Ox01);while(l)Seg7_Led_display(data);調(diào)用顯示函數(shù)將寫入的數(shù)據(jù)又讀出來文件:eeproml2.rar大?。?0KB卜載：里4.定時器0（輪循方式）/*定時器0和2（均為八位的定時計數(shù)器）有四種工作模式，此例是工作在普通模式。在此模式下，計數(shù)器不斷的累加，當計數(shù)到最大值Oxff后返回到0 x00重新開始，在TCNT0為0的同時，T/C溢出標志TOVO置位*/使用輪循方式，當TIFR溢出時，uc_led加1.輸出到led時期發(fā)光/TIFR中斷標志寄存器

20、#include#defineucharunsignedcharucharuc_led,k;voidmain（）設(shè)置數(shù)碼管輸出高電平DDRE|=12；PORTE|=12；DDRA=0XFF；PORTF=OXFF；TCNT0=0X00；設(shè)定定時計數(shù)器的初值為0TCCR0=0X05；/使用1024分頻（共有7種時鐘）ucJed=0;k=0;while(l)while(!(TIFR&0X01)；/循環(huán)檢測TIFR中的溢出標志是否有效/PORTA=ucJed;uc_led+;if(ucjed=255)uc_led=O;k+;if(k=255)k=0;PORTA=k；TIFR|=0X01；寫1到TIFR

21、的TOVO位清除溢出標志為TOVO5、定時器0中中斷/*/*定時器TO測試程序/*目標器件:ATmegal28/*晶振:RC8MHZ*/*/*/*編譯環(huán)境：ICCAVR7.13*/*E-Mail: HYPERLINK mailto: x01；/*函數(shù)功能:主程序入口參數(shù)：出口參數(shù)：*/voidmain(void)CLI();/disableallinterruptsport_init();timerOnit();MCUCR=0 x00;TIMSK=0 x01；/TO溢出使能SEI()；/enableinterrupts定時器1測試程序/*/*/*定時器T1測試程序/*/*包倉頭文件*/#inc

22、lude#inelude/*個局變;r*/intk;/*函數(shù)功能:端口初始化程序入口參數(shù)：出口參數(shù)：*/voidportjnit(void)DDRE|=12；PORTE|=140)k=0;PORTA0 x01；/*函數(shù)功能:主程序入口參數(shù)：出口參數(shù)：*/voidmain(void)CLI();/disableallinterruptsport_init();timerlnit();MCUCR=0 x00;TIMSK=0 x04；/TO溢出使能SEI();/enableinterrupts7、定時器1測試程序之二/*/*/*定時器T1測試程序/*定時時間為1秒*/*/*包倉頭文件*/#inclu

23、de#include/*個局變;d*/intcountnum;/*函數(shù)功能:端口初始化程序入口參數(shù)：出口參數(shù)：*/voidportJnit(void)DDRE|=12；PORTE|=1#include/*牙宦義*/#definefosc8000000晶振8MHZ#definebaud2400波特率/*兩數(shù)功能:uatO初始化程序入口參數(shù):出口參數(shù):*/voiduartOnit(void)UCSROB=0 x00；關(guān)閉UARTOOUCSROA=0 x00；不使用倍速發(fā)送(異步)UCSROC=(1UCSZO1)|(1UCSZOO)；數(shù)據(jù)位為8位UBRR0L=(fosc/16/(baud+l)%25

24、6;異步正常惜況下的計算公式UBRR0H=(fosc/16/(baud+l)/256；UCSROB=(1RXENO)|(1TXENO)；接收使能和發(fā)送使能/*因數(shù)功能:uartO發(fā)送單字節(jié)數(shù)據(jù)入口參數(shù):c出口參數(shù)：*/voidputcharO(unsignedcharc)while(!(UCSROA&(1UDREO);/表明發(fā)送器已經(jīng)準備就緒UDR0=C；將要發(fā)送的數(shù)據(jù)裝入UDR0寄存器/*函數(shù)功能:uartO接收單字節(jié)數(shù)據(jù)入口參數(shù)：出口參數(shù)：*/unsignedchargetcharO(void)while(!(UCSROA&(1#include/*牙左義*/#definefosc80000

25、00晶振8MHZ#definebaud9600波特率/*函數(shù)功能:uatl初始化程序入口參數(shù)：出口參數(shù)：*/voiduartljnit(void)/USART1初始化UCSR1B=0 x00；關(guān)閉USART1UCSR1A=0 x00；不適使用倍速發(fā)送UCSR1C=(1VVUCSZ11)|(1VVUCSZ1O)；數(shù)據(jù)位為八位UBRRlL=(fosc/16/(baud+l)%256;/異步疋常模式下，UBRR的計算公式UBRRlH=(fosc/16/(baud+l)/256;UCSR1B=(1RXEN1)|(1TXEN1)；/接收使能，傳送使能/*函數(shù)功能:uartl發(fā)送單字節(jié)數(shù)據(jù)入口參數(shù):c出口

26、參數(shù)：*/voidputcharl(unsignedcharc)串口1發(fā)送字符while(!(UCSR1A&(1UDRE1)；/表明發(fā)送器一準備就緒UDRl=c；/*函數(shù)功能:uartl接收單字節(jié)數(shù)據(jù)入口參數(shù)：出口參數(shù)：*/unsignedchargetcharl(void)/$口1接回收數(shù)據(jù)while(!(UCSRlA&(1VVRXC1);returnUDR1;將接收到的字符返回/*函數(shù)功能:uartl發(fā)送字符串數(shù)據(jù)入口參數(shù):*s出口參數(shù)：*/voidputsl(char*s)while(*s)putcharl(*s);s+;putchal(OxOa);回車換行putcharl(OxOd);

27、/*函數(shù)功能:主程序入口參數(shù)：出口參數(shù)：*/voidmain(void)unsignedchari;uartljnit();putsl(”HELLO);while(l)putsl(Htestok!”);串口調(diào)試助手SCoMAssistant2.涪空重填|撿送的字符/數(shù)據(jù)htty/Zr血TindJE.163.如制發(fā)送手君發(fā)送|廠自動發(fā)送倜期改翅重選)自動發(fā)送周期：阿i亳秒選擇發(fā)送文件還沒有選擇丈件發(fā)送文件MAILt*jSTATUS：CONIOFEHEBz24.00,1(,8,1.fRX：:15577TX:銅Count-srRESET需要注總的是：1、耍保證串口通信的成功，PC機和單片機必須設(shè)用成

28、一樣的波特率，這樣才能夠保證串口通信的成功。2、上面提到的串口指的是九針的串口，它的兒個相應(yīng)的管腳定義如下：2接受數(shù)據(jù)(RXD)3發(fā)出數(shù)據(jù)(TXD)5伯號地線(SG)下面是引腳圖10.ATMEGA128SPI驅(qū)動ATMEGA128單片機SPI通信驅(qū)動程序/*文件:spi.c用途:SPI驅(qū)動/*函數(shù)名稱:spi_init(void)*功能描述：SPI初始化*輸入：*輸出：*全局變戢：無*調(diào)用模塊：*說明:*注意:*/voidspijnit(void)DDRB|=(1MOSI)|(1SCK)|(KSS)；/設(shè)置MOSI和SCK輸出SPCR=(1SPE)|(1MSTR)|(1SPRO)|(1SPR1

29、)；使能SPI,主機模式/SPE,使能SPI：MSTR,主機模式:SPRO和SPR1設(shè)置時鐘頻率/*函數(shù)名稱：SPI_MasterTransmit(charData)*功能描述：SPI主機發(fā)送數(shù)拯*輸入：Data需要通過SPI傳輸?shù)臄?shù)據(jù)*輸出：*全局變戢：無*調(diào)用模塊：*說明:*注意:*/voidSPI_MasterTransmit(charData)/*啟動數(shù)據(jù)傳輸*/SPDR=Data;/*等待傳輸結(jié)束*/whlle(!(SPSR&(1SPIF)串行發(fā)送結(jié)束以后SPIF置位(即為1)11.PWM波形輸出#include#include#defineuintunsignedint#defin

30、eucharunsignedcharvoiddelay_ms(uintn)uinti=Ozj;while(in)(for(j=0;j1000;j+);i+；voidpwmOnit(void)DDRB=0X10；TCCRO=OXOO;OCRO=OX7F；/8位的定時計數(shù)器的初值設(shè)定為0 x7fTCNTO=O；計數(shù)器TCCR0=0X6A;/設(shè)代為快速pwm模式，采取8分頻voidmain(void)ucharwide;chartemp;pwmOJnit();while(l)delay_ms(50);if(+wide=255)wide=O;OCRO=wide;定時器1數(shù)碼管顯示(is)config.

31、h文件/*時間誤差：0.00672秒每秒*/#defineSS0#defineSCK1#defineMOSI2#defineMISO3#defineSS_H()PORTB|=(1SS)#defineSS_L()PORTB&=(1VVSS)注意，不要漏掉了(開第一個數(shù)碼管的位選#defineledO_en()DDRB|=14；PORTB|=(14);#defineledO_dis()DDRB|=14;PORTB&=(1VV4);#defineledl_en()DDRB|=15;PORTB|=(15);#defineledl_dis()DDRB|=15;PORTB&=(1VV5);#defineI

32、ed2_en()(DDRB|=16;PORTB|=(16);#defineIed2_dis()DDRB|=16;PORTB&=(1VV6);#defineIed3_en()(DDRB|=17;PORTB|=(17);#defineIed3_dis()DDRB|=17;PORTB&=(1VV7);#defineOE7#definepoint4#definedp7#include#ineludevoidportJnit(void)DDRA=OXFF；PORTA=OXFF；constunsignedchartable=0 x3F,0 x06/0 x5Bz0 x4Fz0 x66,0 x6D,0 x7D

33、,0 x07,0 x7F,0 x6F,0 x77,0 x7C,0 x39,0 x5E,0 x79,0 x71,0 x00；volatileunsignedcharled_buffer4;voiddelay_lus(void)/Ius延時函數(shù)asm(HnopH);voiddelay_nus(unsignedintn)Nus延時函數(shù)unsignedinti=0;for(i=0;ivn;i+)delay_lus();voiddelay_lms(void)/1ms延時函數(shù)unsignedinti;for(i=0;i1140;i+);voiddelay_nms(unsignedintn)Nms延時函數(shù)u

34、nsignedinti=0;for(i=0;ivn;i+)關(guān)第一個數(shù)碼管的位選/0丄2加5,6,7,8,9/abedejdelay_lms();/*完成spi的初始化*/voidspijnit(void)DDRB|=(1VVMOSI)|(1VVSCK)|(1VVSS)；設(shè)置MOSI,SCK輸出SPCR=(1VVSPE)|(1VVMSTR)|(1VVSPRO)|(1VVSPR1)；使能SPI,主機模式/*spi主機傳送數(shù)據(jù)*/voidSPI_MasterTransmit(charData)/*啟動數(shù)據(jù)傳輸*/SPDR=Data;/*等待傳輸結(jié)束*/while(!(SPSR&(1SPIF)f/*完

35、成對HC595的初始化*/voidHC_595Jnit(void)DDRC|=(1OE)；設(shè)置PORTC7為輸出PORTC&=(1OE)；輸出高電平,使能595PORTB=OXOF；同時打開四個數(shù)碼管的位選spinit();led_buffer0=16;初始化數(shù)碼管段碼led_bufferl=16;led_buffer2=16;led_buffer3=16;/*HC595完成傳送數(shù)據(jù)*/voidHC_595_OUT(unsignedchardata)SS_L()；SPI_MasterTransmit(data);SS_H()；voidleddis_update(void)/*最低位數(shù)碼管，第四

36、個數(shù)碼管*7if(point=O)HC_595_OUT(tableled_buffer3|(ldp);elseHC_595_OUT(tableled_buffer3);ledO_en();delay_nus(60);ledO_dis();if(point=l)HC_595_OUT(tableled_buffer2|(ldp);elseHC_595_OUT(tableled_buffer2J);ledl_en();delay_nus(60);ledl_dls();if(point=2)HC_595_OUT(tableled_bufferl|(ldp);elseHC_595_OUT(tablele

37、d_bufferlJ);Ied2_en();delay_nus(60);Ied2_dis();/*最高位數(shù)碼管，第一個數(shù)碼管*/if(point=3)HC_595_OUT(tableled_buffer0|(l9999)HC_595_OUT(OxFF)；當計數(shù)大丁9999時，四個數(shù)碼管同時輸出8PORTB|=(14)|(15)|(16)|(1999)led_bufferO=data/lOOO;led_bufferl=(data%1000)/100;led_buffer2=(data%100)/10;led_buffer3=data%10;leddis_update();elseif(data9

38、9)led_buffer0=16;關(guān)閉最高位的那個數(shù)碼管led_bufferl=(data%1000)/100;led_buffer2=(data%100)/10;led_buffer3=data%10;leddis_update();elseif(data9)led_buffe0=16;led_bufferl=16;led_buffer2=(data%100)/10;led_buffer3=data%10;leddis_update();elseled_buffe0=16;led_bufferl=16;led_buffer2=16;led_buffer3=data%10;leddis_upd

39、ate();voidinit_devices(void)CLI()；portjnit();/disableallinterrupts端口初始化HC_595Jnit();/595初始化timerljnit();定時器1初始化/TIMSK=0X04；定時器1中斷溢出使能或者寫成TIMSK|=(1TOIE1)；main.c文件*/#include#inelude#includeconfig.hH/*令加變n;*/intk;volatileunsignedintent;/*函數(shù)功能:定時器初始化程序入口參數(shù)：出口參數(shù)：*/voidtimerlnit(void)TCCR1B=0 x00;/stopTCN

40、T1H=OxFF;/setupIsTCNT1L=0 x3D；7/(12*16+2)*40*1024/8000000=0.99328sOCR1AH=0 x00；OCR1AL=0 xC3；OCR1BH=0 x00；OCR1BL=0 xC3；OCR1CH=0 x00；OCR1CL=0 xC3；ICR1H=0 x00；ICR1L=0 xC3；TCCR1A=0 x00；TCCR1B=0 x05;/startTimer1024DDRE|=12;PORTE|=140)k=0;PORTA0 x01；cnt+;if(cnt=10000)cnt=0;/*函數(shù)功能:主程序入口參數(shù)：出口參數(shù)：*/voidmain(v

41、oid)CLI();/disableallinterruptsinit_devices();MCUCR=0 x00;TIMSK=0 x04；/TO溢出使能SEI();/enableinterruptswhile(l)display_led(cnt);定時器1：定時計數(shù)（is）main.c文件：*/#include#inelude#includeconfig.h*/intk;volatileunsignedintent;unsignedcharfenpin=0 x01,0 x02,0 x03,0 x04,0 x05;分頻系數(shù)分別為：1,8,64,256,1024；/*函數(shù)功能:定時器初始化程序入

42、口參數(shù)：出口參數(shù):*/voidtimerlnit(void)TCCR1B=0 x00；/stopTCNT1H=OxFO;/setupIsTCNT1L=OxBE；/(16*16*15+4*16)*1024/8000000*2=0.999424STCCR1A=0 x00；TCCR1B=fenpin4;/startTimer1024DDRE|=12;PORTE|=12；/*函數(shù)功能:定時中斷服務(wù)程序入口參數(shù)：出口參數(shù)：*/#pragmainterrupt_handletimerl_ovfjsr:15voidtimerl_ovfjsr(void)TCNT1H=OxFO;/reloadcounterhi

43、ghvalueTCNT1L=OxBE;/reloadcounterlowvaluecnt+;if(cnt=20000)cnt=O;/*因數(shù)功能:主程序入口參數(shù)：出口參數(shù)：*/voidmain(void)CLI();/disableallinterruptsinit_devices();MCUCR=0 x00;TIMSK=0 x04；/Tl溢出使能SEI();/enableinterruptswhile(l)display_led(cnt/2);config.h文件：/*時間誤湼：0.00672秒毎秒*/#defineSS0#defineSCK1#defineMOSI2#defineMISO3#

44、defineSS_H()PORTB|=(1SS)#defineSS_L()PORTB&=(1VVSS)注意，不要漏掉了(#defineled0_en()(DDRB|=14;PORTB|=(14);開第一個數(shù)碼管的位選#defineledO_dis()DDRB|=14;PORTB&=(lv4)汀關(guān)第一個數(shù)碼管的位選#defineledl_en()DDRB|=15;PORTB|=(15);#defineledl_dis()DDRB|=15;PORTB&=(1VV5);#defineIed2_en()DDRB|=16;PORTB|=(16);#defineIed2_dis()DDRB|=16;POR

45、TB&=(1VV6);#defineIed3_en()DDRB|=17;PORTB|=(17);#defineIed3_dis()DDRB|=17;PORTB&=(1VV7);#defineOE7#definepoint4#definedp7#include#ineludevoidportJnit(void)DDRA=0XFF；PORTA=OXFF；0H45,6,7,8,9/abGcteJconstunsignedchartable=0 x3F,0 x06/0 x5Bz0 x4Fz0 x66,0 x6D,0 x7D，0 x07,0 x7Fz0 x6F,0 x77,0 x7C,0 x39,0 x

46、5Ez0 x79,0 x71,0 x00；volatileunsignedcharled_buffer4;voiddelay_lus(void)/Ius延時函數(shù)asm(FopH);voiddelay_nus(unsignedintn)Nus延時函數(shù)unsignedinti=0;for(i=0;in;i+)delay_lus();voiddelay_lms(void)/1ms延時函數(shù)unsignedinti;for(i=0;i1140;l+);voiddelay_nms(unsignedintn)/Nms延時函數(shù)unsignedinti=0;for(i=O;in；i+)delay_lms();/

47、*完成spi的初始化*/voidspijnit(void)DDRB|=(1VVMOSI)|(1VVSCK)|(1VVSS)；設(shè)置MOSI,SCK輸出SPCR=(1VVSPE)|(1VVMSTR)|(1VVSPRO)|(1VVSPR1)；使能SPI,主機模式/*spi主機傳送數(shù)據(jù)*/voidSPI_MasterTransmit(charData)/*啟動數(shù)據(jù)傳輸*/SPDR=Data;/*等待傳輸結(jié)束*/while(!(SPSR&(1SPIF)f/*完成對HC595的初始化*/voidHC_595nit(void)DDRC|=(1OE)；設(shè)置PORTC7為輸出PORTC&=(1VVOE)；輸出高

48、電平，使能595PORTB=OXOF；同時打開四個數(shù)碼管的位選spinit();led_buffer0=16;初始化數(shù)碼管段碼led_bufferl=16;led_buffer2=16;led_buffer3=16;/*HC595完成傳送數(shù)據(jù)*/voidHC_595_OUT(unsignedchardata)SS_L()；SPI_MasterTransmit(data);SS_H()；voidleddis_update(void)/*授低位數(shù)碼管，第四個數(shù)碼管*7if(point=O)HC_595_OUT(tableled_buffe3|(lvvdp);elseHC_595_OUT(table

49、led_buffer3);ledO_en();delay_nus(60);ledO_dis();if(point=l)HC_595_OUT(tableled_buffe2|(lvvdp);elseHC_595_OUT(tableled_buffer2);ledl_en();delay_nus(60);ledl_dis();if(point=2)HC_595_OUT(tableled_bufferl|(l9999)HC_595_OUT(OxFF)；當計數(shù)大丁9999時，四個數(shù)碼管同時輸出8PORTB|=(14)|(15)|(16)|(1999)led_buffer0=data/1000;led_bufferl=(data%1000)/100;led_b