RT-Thread-[第3期空气质量分析仪]-第二周作业RT-Thread问答社区

[第3期空气质量分析仪]-第二周作业

发布于 2019-10-25 09:57:30 浏览：1014 订阅该版

1，温度线程，不贴了，直接menuconfig开箱即用
2，甲醛线程，我用的是硬件I2C，不知道有没有人跟我一样，感觉像在造轮子:L
```void read_task(rt_base_t SDA, rt_base_t SCL)
{
    rt_uint32_t dat;
    rt_uint16_t CO2_data,TVOC_data;

sgp30_ad_write(0x20,0x08,SDA,SCL);
 dat = sgp30_ad_read(SDA,SCL);
 CO2_data = (dat & 0xffff0000) >> 16;
 TVOC_data = dat & 0x0000ffff;
 rt_kprintf("TVOC:%d Ppb,CO2:%d Ppm ",TVOC_data,CO2_data);
}

static void sgp30_entry(void *param)
{
    while(1)
    {
        read_task(SGP30_SDA, SGP30_SCL);
        rt_thread_mdelay(1000);
    }
}

int sgp30_read_sample(void)
{
    rt_thread_t sgp30;
    sgp30_hw_init(SGP30_SDA,SGP30_SCL);
    sgp30 = rt_thread_create("sgp30_tem",
                            sgp30_entry, 
                            RT_NULL,
                            512,
                            19, 
                            5);

if (sgp30 != RT_NULL)
        rt_thread_startup(sgp30);

return 0;
}INIT_APP_EXPORT(sgp30_read_sample);```
3，PM2.5线程，做是做好了，夏普这个传感器真的low，又要加三极管又要加电阻，这还是模块吗？？手头没三极管，暂时不弄了。
```int pm25_init(void)
{
 rt_adc_device_t adc_dev = RT_NULL; //
 rt_thread_t tid1 = RT_NULL; //
 rt_pin_mode(PM25_LED_PIN, PIN_MODE_OUTPUT);
 rt_pin_write(PM25_LED_PIN, PIN_HIGH);
 adc_dev = GP2Y1010AU0F_hw_Init(ADC_DEV_NAME); //初始化GP2Y1010AU0F，并读取设备句柄
 /* 创建线程 1，名称是 thread1，入口是 thread1_entry*/
 tid1 = rt_thread_create("pm25", //线程名称
 pm25_entry, //线程入口函数
 adc_dev, //线程入口函数参数
 300, //线程栈大小单位字节
 23, //线程优先级
 15); //线程的时间片大小
 if (tid1 != RT_NULL)
 {
 rt_kprintf("create pm25 succeed ");
 if (RT_EOK != rt_thread_startup(tid1))
 rt_kprintf("startup pm25 failed ");
 else
 rt_kprintf("startup pm25 succeed ");
 }

return 0;
}
INIT_APP_EXPORT(pm25_init);``````void pm25_entry(void *paran) //PM2.5线程入口函数
{
    rt_uint32_t value  = 0;
    float value1 = 0;

/* 读取采样值 */
 while (1)
 {
 rt_pin_write(PM25_LED_PIN, PIN_LOW);
 rt_hw_us_delay(280);
 value1 = GP2Y1010AU0F_ADC(paran);
 // rt_kprintf("GP2Y1010电压:%d.%02d ", value1 / 100, value1 % 100);
 value = value1;
 rt_hw_us_delay(40);
 rt_pin_write(PM25_LED_PIN, PIN_HIGH);
 rt_hw_us_delay(680);
 for(int i=1;i<=10;i++)
 rt_hw_us_delay(900);
 /* 转换为对应电压值 */
 value /= 100;
 value = (value * 0.17) - 0.1;
 value = (rt_uint32_t)(value * 100);
 rt_kprintf("pm2.5: %d.%02dmg/m3 ", value / 100, value % 100);
 // rt_kprintf("GP2Y1010电压:%d.%02d ", (int)value1 / 100, (int)value1 % 100);
 rt_thread_mdelay(1000);
 }
}```

![K0[JAU0W%]0$E{[KE]LZGCW.png](https://oss-club.rt-thread.org/uploads/201910/25/095726jg2kbtgi1tbti92x.png)