光敏电阻和人体红外获取数据变化的疑问

#include<stdio.h>

#include<unistd.h>

 

#include "ohos_init.h"

#include "cmsis_os2.h"

#include "wifiiot_gpio.h"

#include "wifiiot_gpio_ex.h"

#include "wifiiot_pwm.h"

#include "wifiiot_adc.h"

#include "wifiiot_errno.h"

 

#define PWM_FREQ_DIVITION 64000

#define ADC_RESOLUTION 4996

 

static void jltfcloudcom(void *arg)

{

    (void)arg;

    //由于炫彩灯板中红色led灯的GIPO为10，这里初始化控制GPIO10的控制方式为PWM模式

    IoSetFunc(WIFI_IOT_IO_NAME_GPIO_10,WIFI_IOT_IO_FUNC_GPIO_10_PWM1_OUT);

 

    //调用函数初始化PWM模式

    PwmInit(WIFI_IOT_PWM_PORT_PWM1);

    

   while(1){

       unsigned short data = 0;

       unsigned short duty = 0;

       //使用AdcRead函数对3通道进行ADC信号读取，读取到的结果存储在data中

       if(AdcRead(WIFI_IOT_ADC_CHANNEL_3,&data,WIFI_IOT_ADC_EQU_MODEL_4,WIFI_IOT_ADC_CUR_BAIS_DEFAULT,0)==WIFI_IOT_SUCCESS)

       {

           printf("data:%d",data);

           duty = PWM_FREQ_DIVITION *(unsigned int)data / ADC_RESOLUTION;

           //128 1820

            //duty = PWM_FREQ_DIVITION * (1948-(unsigned int)data) / ADC_RESOLUTION;

 

       }

       //PWM模式开启对红色led灯的控制

       PwmStart(WIFI_IOT_PWM_PORT_PWM1,duty,PWM_FREQ_DIVITION);

       usleep(10000);

       //PWM模式关闭对红色led灯的控制

       PwmStop(WIFI_IOT_PWM_PORT_PWM1);

 

   }

}

static void jltfcloudcn(void)

{

    osThreadAttr_t attr;

    GpioInit();

    attr.name="jltfcloudcom";

    attr.attr_bits=0U;

    attr.cb_mem=NULL;

    attr.cb_size=0U;

    attr.stack_mem=NULL;

    attr.stack_size=4096;

    attr.priority=osPriorityNormal;

 

    if(osThreadNew(jltfcloudcom,NULL,&attr) == NULL){

        printf("[jltfcloudcn] Failed to create jltfcloudcom!\n");

    }

 

}

APP_FEATURE_INIT(jltfcloudcn);
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