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uint read_adc(uchar adc_input)
{
ADMUX=adc_input | (0x00 & 0xff);
delay_us(10);
ADCSRA|=0x40; //START THE CONVERSION
while ((ADCSRA & 0x10)==0); // wait for the conversion to complete
ADCSRA|=0x10; //clear the ADC flag
return ADCW;
}
问:“ADMUX = adc_input |(0x00 & 0xff)”的含义是什么?我们在这里选择了哪个输入频道?ADC代码与atmega32