145 lines
3.8 KiB
C
145 lines
3.8 KiB
C
#define ADC_DEV_NAME "adc1" /* ADC 设备名称 */
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#define ADC_DEV_CHANNEL 5 /* ADC 通道 */
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#define ADC_DEV_CHANNEL1 6 /* ADC 通道 */
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#define ADC_DEV_CHANNEL2 7 /* ADC 通道 */
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#define REFER_VOLTAGE 330 /* 参考电压 3.3V,数据精度乘以100保留2位小数*/
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#define CONVERT_BITS (1 << 12) /* 转换位数为12位 */
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#include <rtthread.h>
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#include <rtdevice.h>
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#include <drv_gpio.h>
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rt_thread_t Sensor_Thread = RT_NULL;
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#define THREAD_PRIORITY 25
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#define THREAD_STACK_SIZE 4096
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#define THREAD_TIMESLICE 5
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#define PM25_READ_TIMES 20
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#define GPIO_PIN GET_PIN(G, 5)
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#define LOG_TAG "sensor"
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#define DBG_LVL DBG_LOG
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// #define DBG_LVL DBG_INFO
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#define USE_LOG1
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#define USE_LOG2
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#define USE_LOG3
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// #define USE_LOG4
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#define USE_LOG5
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// #define USE_LOG6
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// #define USE_LOG_D
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#include "logn.h"
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float ADC_air;
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float ADC_PM25;
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float ADC_pressure;
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float ADC_Read()
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{
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rt_adc_device_t adc_dev; /* ADC 设备句柄 */
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rt_uint32_t value, vol;
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/* 查找设备 */
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adc_dev = (rt_adc_device_t)rt_device_find(ADC_DEV_NAME);
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/* 使能设备 */
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rt_adc_enable(adc_dev, ADC_DEV_CHANNEL);
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/* 读取采样值 */
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value = rt_adc_read(adc_dev, ADC_DEV_CHANNEL);
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return value;
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}
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float ADC1_Read()
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{
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rt_adc_device_t adc_dev; /* ADC 设备句柄 */
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rt_uint32_t value, vol;
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/* 查找设备 */
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adc_dev = (rt_adc_device_t)rt_device_find(ADC_DEV_NAME);
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/* 使能设备 */
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rt_adc_enable(adc_dev, ADC_DEV_CHANNEL1);
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/* 读取采样值 */
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value = rt_adc_read(adc_dev, ADC_DEV_CHANNEL1);
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return value;
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}
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float ADC2_Read()
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{
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rt_adc_device_t adc_dev; /* ADC 设备句柄 */
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rt_uint32_t value, vol;
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/* 查找设备 */
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adc_dev = (rt_adc_device_t)rt_device_find(ADC_DEV_NAME);
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/* 使能设备 */
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rt_adc_enable(adc_dev, ADC_DEV_CHANNEL2);
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/* 读取采样值 */
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value = rt_adc_read(adc_dev, ADC_DEV_CHANNEL2);
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return value;
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}
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float PM25_GetData(void)
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{
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int ADCVal;
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int dustVal = 0;
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float Voltage;
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rt_pin_write(GPIO_PIN, PIN_HIGH);//置1 开启内部LED
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rt_hw_us_delay(280);
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ADCVal = ADC1_Read();
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rt_hw_us_delay(25);
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rt_pin_write(GPIO_PIN, PIN_LOW); //置0 关闭内部LED
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rt_hw_us_delay(9680); //需要脉宽比0.32ms/10ms的PWM信号驱动传感器中的LED
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Voltage = 3.3f * ADCVal / 4096.f * 2; //获得AO输出口的电压值
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dustVal = (0.17*Voltage-0.1)*1000; //乘以1000单位换成ug/m3//
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if (dustVal < 0)
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dustVal = 0; //限位//
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if (dustVal>500)
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dustVal=500;
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return dustVal;
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}
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/**
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* @brief 平均值滤波法
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* @param 无
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* @retval 返回滤波后的数据
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*/
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float Get_PM25_Average_Data(void)
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{
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float temp_val=0;
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float t;
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for(t=0;t<PM25_READ_TIMES;t++) //#define PM25_READ_TIMES 20 定义读取次数,读这么多次,然后取平均值
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{
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temp_val+=PM25_GetData(); //读取ADC值
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rt_thread_mdelay(5);
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}
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temp_val/=PM25_READ_TIMES;//得到平均值
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return temp_val;//返回算出的ADC平均值
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}
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static void sensor_thread(void *parameter)
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{
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while (1)
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{
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ADC_air = ADC_Read(); // 空气质量传感器数值 0-4095 表示从差到优秀
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ADC_PM25 = Get_PM25_Average_Data(); // PM2.5传感器数值0-500 表示从优秀到查差
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ADC_pressure = ADC2_Read(); // 压力传感器数值 0-4095 表示从差到优秀
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LOG5("ADC_air:%f,ADC_PM25:%f,ADC_pressure:%f", ADC_air, ADC_PM25, ADC_pressure);
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rt_thread_mdelay(1000);
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}
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}
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void sensor_init(void)
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{
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Sensor_Thread = rt_thread_create("sensor", sensor_thread, RT_NULL, THREAD_STACK_SIZE, THREAD_PRIORITY, THREAD_TIMESLICE);
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if (Sensor_Thread != RT_NULL)
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{
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rt_thread_startup(Sensor_Thread);
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}
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else
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{
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rt_kprintf("Sensor_Thread Create Failed!\n");
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}
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}
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// MSH_CMD_EXPORT_ALIAS(sensor_init, sensor, run my sensors);
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