ATtiny13A ADC查詢法使用

ID:91521 · 發(fā)表于 2020-5-30 16:39

void adc_init(void)

{

ADCSRA = 0x00; //禁用ADC

ADMUX = 0x03;

ACSR = 0x80; //禁用模擬比較器

ADCSRB = 0x00;

ADCSRA = 0x83;

}

uint read_adc(void)

{

uint temp = 0;

ADCSRA |= (1 << ADSC); //使能AD轉(zhuǎn)換，第一次轉(zhuǎn)換，結(jié)果丟棄

while((ADCSRA & (1 << ADIF)) == 0); //等待AD轉(zhuǎn)換結(jié)束

ADCSRA |= (1 << ADIF); //ADIF寫1用來清除ADIF，規(guī)格書上要求的

ADCSRA |= (1 << ADSC); //使能AD轉(zhuǎn)換，第二次轉(zhuǎn)換，結(jié)果保留

while((ADCSRA & (1 << ADIF)) == 0); //等待AD轉(zhuǎn)換結(jié)束

ADCSRA |= (1 << ADIF);

temp = ADCL;

temp |= (int)(ADCH << 8);

return temp;

}

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