1、ATmega128实例程序1、流水灯/*硬件环境:atmega128开发板软件环境:CodeVisionAVR-C*/#include #define uchar unsigned char#define uint unsigned intuchar cnt;void timer1_init() TCCR1B=0X00; /先停止定时器1 TCNT1H=0XF0; /设定定时器初值 TCNT1L=0XBE; TCCR1A=0X00; /启动定时器1 TCCR1B=0X05; /使用1024分频interrupt TIM1_OVF void timer1_ovf_isr(void) TCNT1H
2、=0XF0; /重载定时器初值 TCNT1L=0XBE; DDRE|=12; PORTE|=12; DDRA=0xff; PORTA=cnt; /输出led的值到端口B cnt+; if(cnt=255) cnt=0;void main() /DDRB=0XFF; SREG|=0X80; TIMSK=0X04; timer1_init(); while(1) ; 2、AD转换+数码管显示/*/*ADC测试程序 */*目标器件:ATmega128 */*晶振:RC 8MHZ */*编译环境:ICCAVR 7.13A */*E-Mail:* */*时间:2010年11月13日 */Aref接AVC
3、C(+5V),采用Aref作参考电压/*用数码管显示AD转换的结果*/*/*包含头文件*/#include #include /*数码管段码表*/extern const unsigned char tab=0x3f,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07, 0x7F,0x6F;/*全局变量*/unsigned int adc_rel=0;/*函数功能:ADC初始化函数入口参数:出口参数:*/void adc_init(void)DDRF&=0XFE; /PORTF0设置为输入,即作为ADC0口输入模拟电压PORTF&=0XFE; /PORTF0设置为输入低电平A
4、DCSRA=0x00; /关ADCADMUX = 0X00; /采用Aref作为参考电压,ADC0单端输入,右对齐ACSR=(1ACD);ADCSRA = (1ADEN)|(1ADSC)|(1ADATE)|(1ADIE)|(1ADPS2)|(1ADPS1);/ADEN,启动ADC;ADSC,ADC开始转换;ADIE,ADC中断使能;ADPSx,设置分频因子64/*函数功能:ADC中断函数入口参数:出口参数:*/#pragma interrupt_handler adc_isr:iv_ADCvoid adc_isr(void) /int data_h,data_l; /data_l=ADCL;
5、/data_h=ADCH; ADCSRA = 0x00; ADCSRA = (1ADEN)|(1ADSC)|(10x1ff) PORTA|=12; else PORTA&=(12); */*函数功能:延时子程序入口参数:出口参数:*/void delay(void) int i; for(i=0;i1800;i+);/*函数功能:显示子程序入口参数:k出口参数:*/void display(unsigned int k)/发光二极管显示初始化 DDRE|=12;PORTE|=12;DDRA=0XFF;PORTA=k;#define SS 0#define SCK 1#define MOSI 2
6、#define MISO 3#define SS_H() PORTB|=(1SS)#define SS_L() PORTB&=(1SS)#define led0_en()DDRB|=14;PORTB|=(14); /开第一个数码管的位选#define led0_dis()DDRB|=14;PORTB&=(14); /关第一个数码管的位选#define led1_en()DDRB|=15;PORTB|=(15);#define led1_dis()DDRB|=15;PORTB&=(15);#define led2_en()DDRB|=16;PORTB|=(16);#define led2_dis
7、()DDRB|=16;PORTB&=(16);#define led3_en()DDRB|=17;PORTB|=(17);#define led3_dis()DDRB|=17;PORTB&=(17);#define OE 7#define point 3#define dp 7#include #include const unsigned char table=0x3F,0x06,0x5B,0x4F,0x66, /0,1,2,3,4 0x6D,0x7D,0x07,0x7F,0x6F, /5,6,7,8,9 0x77,0x7C,0x39,0x5E,0x79,0x71,0x00; /a,b,c,
8、d,e,fvolatile unsigned char led_buffer4;void delay_1us(void) /1us延时函数 asm(nop); void delay_nus(unsigned int n) /N us延时函数 unsigned int i=0; for (i=0;in;i+) delay_1us(); void delay_1ms(void) /1ms延时函数 unsigned int i; for (i=0;i1140;i+); void delay_nms(unsigned int n) /N ms延时函数 unsigned int i=0; for (i=
9、0;in;i+) delay_1ms(); /*完成spi的初始化*/void spi_init(void) DDRB |= (1MOSI)|(1SCK)|(1SS);/设置MOSI,SCK输出 SPCR = (1SPE)|(1MSTR)|(1SPR0)|(1SPR1);/使能SPI,主机模式/*spi主机传送数据*/void SPI_MasterTransmit(char Data) /* 启动数据传输 */ SPDR = Data; /* 等待传输结束 */ while(!(SPSR & (1SPIF) ;/*完成对HC595的初始化*/void HC_595_init(void)DDRC
10、 |= (1OE); /设置PORTC7为输出PORTC &= (1OE); /输出高电平,使能595PORTB = 0x0F; /同时打开四个数码管的位选spi_init();led_buffer0=16; /初始化数码管段码led_buffer1=16;led_buffer2=16;led_buffer3=16;/*HC595完成传送数据*/void HC_595_OUT(unsigned char data) SS_L(); SPI_MasterTransmit(data); SS_H();void leddis_update(void) /*最低位数码管,第四个数码管*/ if(poi
11、nt=0) HC_595_OUT(tableled_buffer3|(1dp); else HC_595_OUT(tableled_buffer3); led0_en(); delay_nus(60); led0_dis(); if(point=1) HC_595_OUT(tableled_buffer2|(1dp); else HC_595_OUT(tableled_buffer2); led1_en(); delay_nus(60); led1_dis(); if(point=2) HC_595_OUT(tableled_buffer1|(1dp); else HC_595_OUT(tab
12、leled_buffer1); led2_en(); delay_nus(60); led2_dis(); /*最高位数码管,第一个数码管*/ if(point=3) HC_595_OUT(tableled_buffer0|(19999) HC_595_OUT(0xFF);/当计数大于9999时,四个数码管同时输出8 PORTB|=(14)|(15)|(16)|(1999) led_buffer0=data/1000; led_buffer1=(data%1000)/100; led_buffer2=(data%100)/10; led_buffer3=data%10; leddis_upda
13、te();else if(data99) led_buffer0=data/1000; /关闭最高位的那个数码管 led_buffer1=(data%1000)/100; led_buffer2=(data%100)/10; led_buffer3=data%10; leddis_update(); else if(data9) led_buffer0=data/1000; led_buffer1=16; led_buffer2=(data%100)/10; led_buffer3=data%10; leddis_update();else led_buffer0=data/1000; led
14、_buffer1=16; led_buffer2=16; led_buffer3=data%10; leddis_update();volatile unsigned int countnum=0; void timer1_init(void)TCCR1B = 0x00; /stopTCNT1H = 0x8F; /setupTCNT1L = 0x81;OCR1AH = 0x70;OCR1AL = 0x7F;OCR1BH = 0x70;OCR1BL = 0x7F;OCR1CH = 0x70;OCR1CL = 0x7F;ICR1H = 0x70;ICR1L = 0x7F;TCCR1A = 0x00
15、;TCCR1B = 0x04; /start Timer#pragma interrupt_handler timer1_ovf_isr:15void timer1_ovf_isr(void)TCNT1H = 0x8F; /reload counter high valueTCNT1L = 0x81; /reload counter low valuecountnum+;if(countnum9999) countnum=0;void init_devices(void)CLI(); /disable all interruptstimer1_init();TIMSK = 0x04; /tim
16、er interrupt sourcesSEI(); /re-enable interrupts/*函数功能:主程序入口参数:出口参数:*/void main(void) init_devices(); HC_595_init(); adc_init(); SEI();/开全局中断变量 display(0); while(1) delay(); display_led(adc_rel/1024.0*5*1000); 3、对EEPROM进行读写操作/*文件:main.c用途:注意:内部8M晶振*/#include config.h/*向EEPROM里面写入数据输入量:地址,数据*/void EE
17、PROM_write(unsigned int uiAddress,unsigned char ucData)while(EECR&(1EEWE); /等待上一次写操作结束EEAR = uiAddress; /地址EEDR = ucData; /数据EECR |=(1EEMWE); /置位EEMWE,主机写使能EECR |=(1EEWE); /置位EEWE,写使能,启动写操作/*从EEPROM指定的地址里面读出相应的数据*/unsigned char EEPROM_read(unsigned int uiAddress)while(EECR&(1EEWE); /等待上一次写操作结束EEAR =
18、 uiAddress; /设置地址寄存器EECR |=(1EERE); /读使能return EEDR; /返回读入EEDR里面的数据void main(void)unsigned char temp=123;unsigned char data;HC_595_init();EEPROM_write(0x01,temp);data=EEPROM_read(0x01);while(1) Seg7_Led_display(data); /调用显示函数将写入的数据又读出来文件:eeprom12.rar大小:40KB下载:下载4、定时器0(轮循方式)/*定时器0和2(均为八位的定时计数器)有四种工作模
19、式,此例是工作在普通模式。在此模式下,计数器不断的累加,当计数到最大值0xff后返回到0x00重新开始,在TCNT0为0 的同时,T/C溢出标志TOV0置位*/使用轮循方式,当TIFR溢出时,uc_led加1,输出到led时期发光/TIFR中断标志寄存器#include #define uchar unsigned charuchar uc_led,k;void main()/设置数码管输出高电平DDRE|=12; PORTE|=12;DDRA=0XFF; PORTF=0XFF;TCNT0=0X00;/设定定时计数器的初值为0TCCR0=0X05;/使用1024分频(共有7种时钟)uc_led
20、=0;k=0;while(1) while(!(TIFR&0X01);/循环检测TIFR中的溢出标志是否有效 /PORTA=uc_led; uc_led+; if(uc_led=255) uc_led=0; k+;if(k=255) k=0; PORTA=k;TIFR|=0X01; /写1到TIFR的TOV0位清除溢出标志为TOV05、定时器0中中断/*/*定时器T0测试程序 */*目标器件:ATmega128 */*晶振:RC 8MHZ */*编译环境:ICCAVR 7.13 */*E-Mail:* */*时间:2010年3月14日 */*TCCRn定时计数器控制寄存器 TCNTn计数器,不断的计数 TIMSK定时计数器中断屏蔽寄存器 TIF
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