adc.h

i2c通信

#ifndef	_ADC_H
#define	_ADC_H   

#define ADC_VREF_TYPE 0x00 

#define ADC_ADCSRA  0x83   ///// 1M 8分频 125K


#define adcinit(ADC_VREF_TYPE,ADC_ADCSRA)  ADMUX=(ADC_VREF_TYPE);ADCSRA=(ADC_ADCSRA)

unsigned int read_adc(unsigned char adc_input)
{
ADMUX=adc_input|ADC_VREF_TYPE;
// Start the AD conversion
ADCSRA|=0x40;
// Wait for the AD conversion to complete
while ((ADCSRA & 0x10)==0);
ADCSRA|=0x10;
return ADCW;
}

#endif