linux 烟雾传感器代码

#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <unistd.h>
#include <linux/i2c-dev.h>
#include <sys/ioctl.h>

#define ADC_DEVICE "/dev/i2c-1" // 根据实际情况修改
#define ADC_ADDRESS 0x48        // ADC芯片的I2C地址

int main() {
    int file;
    char buf[10];
    int adc_value;

    if ((file = open(ADC_DEVICE, O_RDWR)) < 0) {
        perror("Failed to open the i2c bus");
        return 1;
    }

    if (ioctl(file, I2C_SLAVE, ADC_ADDRESS) < 0) {
        perror("Failed to acquire bus access and/or talk to slave");
        return 1;
    }

    buf[0] = 0x40; // 设置ADC为单次转换模式
    if (write(file, buf, 1) != 1) {
        perror("Write error");
        return 1;
    }

    if (read(file, buf, 2) != 2) {
        perror("Read error");
        return 1;
    }

    adc_value = (buf[0] << 8) | buf[1];
    printf("ADC Value: %d\n", adc_value);

    close(file);
    return 0;
}