標題: ATtiny13A ADC查詢法使用 [打印本頁]
作者: daiya 時間: 2020-5-30 16:39
標題: ATtiny13A ADC查詢法使用
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轉換,第一次轉換,結果丟棄
while((ADCSRA & (1 << ADIF)) == 0); //等待AD轉換結束
ADCSRA |= (1 << ADIF); //ADIF寫1用來清除ADIF,規格書上要求的
ADCSRA |= (1 << ADSC); //使能AD轉換,第二次轉換,結果保留
while((ADCSRA & (1 << ADIF)) == 0); //等待AD轉換結束
ADCSRA |= (1 << ADIF);
temp = ADCL;
temp |= (int)(ADCH << 8);
return temp;
}
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