请用c语言编写一个用ADC读取热电偶温度的示例程序

您好，以下是使用C语言编写的ADC读取热电偶温度的示例程序：

#include <stdio.h>
#include <stdlib.h>
#include <wiringPi.h>

#define ADC_CS
#define ADC_CLK 1
#define ADC_DIO 2

int read_adc(unsigned char adc_channel)
{
unsigned char data[3];
int adc_value = ;
int i;

data[] = x06 | ((adc_channel & x07) >> 2);
data[1] = ((adc_channel & x07) << 6);
data[2] = x00;

digitalWrite(ADC_CS, );
for (i = ; i < 3; i++) {
int j;
for (j = ; j < 8; j++) {
if (data[i] & x80) {
digitalWrite(ADC_DIO, 1);
} else {
digitalWrite(ADC_DIO, );
}
data[i] <<= 1;
digitalWrite(ADC_CLK, 1);
digitalWrite(ADC_CLK, );
}
}

for (i = ; i < 10; i++) {
digitalWrite(ADC_CLK, 1);
digitalWrite(ADC_CLK, );
}

for (i = ; i < 10; i++) {
digitalWrite(ADC_CLK, 1);
adc_value <<= 1;
if (digitalRead(ADC_DIO)) {
adc_value |= x01;
}
digitalWrite(ADC_CLK, );
}

digitalWrite(ADC_CS, 1);

return adc_value;
}

int main(void)
{
int adc_value;
float voltage;
float temperature;

if (wiringPiSetup() == -1) {
printf("wiringPi setup failed!\n");
return 1;
}

pinMode(ADC_CS, OUTPUT);
pinMode(ADC_CLK, OUTPUT);
pinMode(ADC_DIO, INPUT);

while (1) {
adc_value = read_adc();
voltage = adc_value * (3.3 / 1024);
temperature = (voltage - .5) * 100;

printf("ADC value: %d\n", adc_value);
printf("Voltage: %.2fV\n", voltage);
printf("Temperature: %.2fC\n", temperature);

delay(100);
}

return ;
}