adc.rar_adc avr_avr_avr adc_数据采集串口

#include <avr/interrupt.h> #include <avr/io.h> #include <avr/signal.h> #include <stdlib.h> void uart_init(void); void timer2_init(void); unsigned int dtime=0; void delay_l(int time);//单位是100us void puts(char *s,unsigned char i); void adc_init() { DIDR0=(1<<ADC0D);//选择ADC0脚为AD输入脚 ADMUX=0x40;//0通道，AVcc作为参考 ADCSRA=(1<<ADEN)|(0<<ADSC)|(1<<ADIF)|0x07;//开启AD } void main() { unsigned int a; char buffer[8]; CLKPR=(1<<CLKPCE); CLKPR=0; uart_init(); adc_init(); timer2_init(); sei(); itoa(3654,buffer,10); while(1) { PRR&=~(1<<PRADC); ADMUX=0x40; ADCSRA|=(1<<ADSC); while(!(ADCSRA&(1<<ADIF))); ADCSRA|=(1<<ADIF); a=ADC; itoa(a,buffer,10); puts(buffer,4); delay_l(1000); } } void timer2_init(void) { TIMSK2 = 0x00; ASSR = 0; //同步时钟 TCNT2 = 5; //定时时间100us,20M晶振 TCCR2B = (0<<CS22)|(1<<CS21)|(0<<CS20); //分频比8,0x07 } SIGNAL(SIG_OVERFLOW2) { TCNT2 = 5; dtime++; } void delay_l(int time)//单位是100us { dtime=0; TCNT2=5; TIMSK2=0x01;//开启中断100us while(dtime<time); TIMSK2=0; return; }