AVR多量程电压表的设计.doc

说明：在Proteus仿真通过，在实际硬件电路中。程序可能需要做适当的调整。C程序#include #include macros.h#define uchar unsigned char #define uint unsigned intuint m,n,TEMP,QIAN,BAI,SHI,GE,dang; uchar ledCode=0xc0,0xf9,0xa4,0xb0,0x99, 0x92,0x82,0xf8,0x80,0x90,0x88,0x83,0xc6,0xa1,0x86,0x8e,0xbf;/*共阳数码管*/uchar FLAGE;void delay_1ms(void) /1ms延时函数 uint i; for (i=0;i1140;i+); void delay_nms(uint n) /N ms延时函数 uint i=0; for (i=0;in;i+) delay_1ms(); void AD_set(void) if(dang=0) ADMUX |= (1 REFS0); /ADC参考电压为AVcc，ADC结果右对齐，选择通道ADC0 ADMUX&=(1MUX1); ADMUX&=(1MUX0); if(dang=1) ADMUX |= (1 REFS0); ADMUX&=(1MUX1); ADMUX|=(1MUX0); if(dang=2) ADMUX |= (1 REFS0); ADMUX|=(1MUX1); ADMUX&=(1MUX0); if(dang=3) ADMUX |= (1 REFS0); ADMUX|=(1MUX1); ADMUX|=(1MUX0); ADCSRA |= (1 ADEN) | (1 ADPS2) | (1 ADPS1); /使能AD转换，ADC时钟64分频 uint AD(void)ADCSRA |= (1 ADSC); /开始AD转换while(!(ADCSRA & (1 ADIF); /等待转换完成ADCSRA |= (1 ADIF); /清零ADC中断标志位return ADC; /返回ADC值void yichangxianshi(void)/超量程显示函数 PORTB=0X01; PORTD=ledCode16; delay_nms(10); PORTB=0X02; PORTD=ledCode16; delay_nms(10); PORTB=0X04; PORTD=ledCode16; delay_nms(10); PORTB=0X08; PORTD=ledCode16; delay_nms(10);void chuli(void)TEMP=0x3ff&m;if(dang=0) n=(int)(long)TEMP*5005*5/(1024*4);/（数据类型）重点难题要注意啊！QIAN=(uchar)(n/1000);BAI=(uchar)(n%1000)/100);SHI=(uchar)(n%100)/10);GE=(uchar)(n%100)%10); if(QIAN=6)&(BAI=2)&(SHI=5)&(GE=0)/判断是否超量程 FLAGE=1; yichangxianshi(); else FLAGE=0; if(dang=1)n=(int)(long)TEMP*5005*5/(1024*3);/（数据类型）重点难题要注意啊！ QIAN=(uchar)(n/1000);BAI=(uchar)(n%1000)/100);SHI=(uchar)(n%100)/10);GE=(uchar)(n%100)%10); if(QIAN=8)&(BAI=3)&(SHI=3)&(GE=3)/判断是否超量程 FLAGE=1; yichangxianshi(); else FLAGE=0; if(dang=2)n=(int)(long)TEMP*500*5/(1023*2);/（数据类型）重点难题要注意啊！ QIAN=(uchar)(n/1000); BAI=(uchar)(n%1000)/100); SHI=(uchar)(n%100)/10); GE=(uchar)(n%100)%10); if(QIAN=1)&(BAI=2)&(SHI=5)&(GE=0)/判断是否超量程 FLAGE=1; yichangxianshi(); else FLAGE=0; if(dang=3)n=(int)(long)TEMP*500*5/1023);/（数据类型）重点难题要注意啊！ QIAN=(uchar)(n/1000); BAI=(uchar)(n%1000)/100); SHI=(uchar)(n%100)/10); GE=(uchar)(n%100)%10); if(QIAN=2)&(BAI=5)&(SHI=0)&(GE=0)/判断是否超量程 FLAGE=1; yichangxianshi(); else FLAGE=0; void xianshi(void) PORTB=0X01; PORTD=ledCodeQIAN; if(dang=0)|(dang=1)/根据量程判断是否个位后显示小数点儿 PORTD&=(17); delay_nms(10); PORTB=0X02; PORTD=ledCodeBAI; if(dang=2)|(dang=3)/根据量程判断是否十位后显示小数点儿 PORTD&=(17); delay_nms(10); PORTB=0X04; PORTD=ledCodeSHI; delay_nms(10); PORTB=0X08; PORTD=ledCodeGE; delay_nms(10); void init(void)DDRB=0X0F;PORTB=0XFF;/数据码DDRD=0XFF;PORTD=0XFF;PORTA =0X80; DDRA = 0x00; /ADC通道设置为输入口，高阻态DDRC=0XFF;PORTC=0XFF;/用于档位的指示dang=0;FLAGE=0;/超量程标志位 void tiaodang(void)/判断按键进行调档 if(PINA & (1 PA7) = 0) delay_nms(30);if(PINA & (1 PA7) = 0) while(PINA & (1 PA7) = 0); dang+; if(dang=4) dang=0; void zhishi(void)/档位指示 switch(dang) case 0:PORTC=0XFE;break; case 1: PORTC=0XFD;break; case 2:PORTC