adc0808各个引脚的代码
时间: 2023-07-03 12:25:35 浏览: 107
ADC0808是一种8位逐次逼近式模数转换器,具有8个输入通道和一个单端模拟输入。下面是ADC0808各个引脚的代码示例:
```c
//定义ADC0808的引脚
#define ADC_CS_PIN 2 //片选引脚
#define ADC_RD_PIN 3 //读取引脚
#define ADC_WR_PIN 4 //写入引脚
#define ADC_INTR_PIN 5 //中断引脚
#define ADC_A_PIN 6 //地址选择引脚A
#define ADC_B_PIN 7 //地址选择引脚B
#define ADC_C_PIN 8 //地址选择引脚C
#define ADC_D_PIN 9 //地址选择引脚D
#define ADC_EOC_PIN 10 //转换结束引脚
#define ADC_OUT_PIN A0 //模拟输出引脚
//初始化ADC0808引脚
void setup() {
pinMode(ADC_CS_PIN, OUTPUT);
pinMode(ADC_RD_PIN, OUTPUT);
pinMode(ADC_WR_PIN, OUTPUT);
pinMode(ADC_INTR_PIN, INPUT);
pinMode(ADC_A_PIN, OUTPUT);
pinMode(ADC_B_PIN, OUTPUT);
pinMode(ADC_C_PIN, OUTPUT);
pinMode(ADC_D_PIN, OUTPUT);
pinMode(ADC_EOC_PIN, INPUT);
}
//设置ADC0808输入通道
void setChannel(byte channel) {
digitalWrite(ADC_A_PIN, channel & 0x01);
digitalWrite(ADC_B_PIN, channel & 0x02);
digitalWrite(ADC_C_PIN, channel & 0x04);
digitalWrite(ADC_D_PIN, channel & 0x08);
}
//读取ADC0808模拟输入
int readADC() {
int value = 0;
digitalWrite(ADC_CS_PIN, LOW);
digitalWrite(ADC_WR_PIN, LOW);
delayMicroseconds(1);
digitalWrite(ADC_WR_PIN, HIGH);
delayMicroseconds(1);
digitalWrite(ADC_RD_PIN, LOW);
delayMicroseconds(1);
value = analogRead(ADC_OUT_PIN);
digitalWrite(ADC_RD_PIN, HIGH);
digitalWrite(ADC_CS_PIN, HIGH);
return value;
}
```
上述代码定义了ADC0808的各个引脚,包括片选引脚、读取引脚、写入引脚、中断引脚、地址选择引脚和模拟输出引脚。通过设置地址选择引脚来选择输入通道,并通过读取模拟输出引脚来获取模拟输入的值。