[文章]鸿蒙Hi3861小视频参赛：自家开发版上光敏电阻功能实现

这里使用的是hi3861上面的三色灯板块中的光敏电阻，可以通过遮挡光线控制灯光的亮和暗。

#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 HUMAN_SENSOR_CHAN_NAME WIFI_IOT_ADC_CHANNEL_3

#define RED_LED_PIN_NAME WIFI_IOT_IO_NAME_GPIO_10

#define RED_LED_PIN_FUNCTION WIFI_IOT_IO_FUNC_GPIO_10_GPIO

#define GREEN_LED_PIN_NAME WIFI_IOT_IO_NAME_GPIO_11

#define GREEN_LED_PIN_FUNCTION WIFI_IOT_IO_FUNC_GPIO_11_GPIO

#define BLUE_LED_PIN_NAME WIFI_IOT_IO_NAME_GPIO_12

#define BLUE_LED_PIN_FUNCTION WIFI_IOT_IO_FUNC_GPIO_12_GPIO

#define LED_DELAY_TIME_US 300000

#define LED_BRIGHT WIFI_IOT_GPIO_VALUE1

#define LED_DARK WIFI_IOT_GPIO_VALUE0

#define NUM_BLINKS 2

#define PWM_FREQ_DIVITION 64000

#define ADC_RESOLUTION 4996

//光敏电阻demo

static void jltfcloudcom(void *arg)

{

    (void)arg;

    IoSetFunc(RED_LED_PIN_NAME,WIFI_IOT_IO_FUNC_GPIO_10_PWM1_OUT);

    IoSetFunc(GREEN_LED_PIN_NAME,WIFI_IOT_IO_FUNC_GPIO_11_PWM2_OUT);

    IoSetFunc(BLUE_LED_PIN_NAME,WIFI_IOT_IO_FUNC_GPIO_12_PWM3_OUT);

    PwmInit(WIFI_IOT_PWM_PORT_PWM1);

    PwmInit(WIFI_IOT_PWM_PORT_PWM2);

    PwmInit(WIFI_IOT_PWM_PORT_PWM3);

   while(1){

       unsigned short data = 0;

       unsigned short duty = 0;

       if(AdcRead(WIFI_IOT_ADC_CHANNEL_4,&data,WIFI_IOT_ADC_EQU_MODEL_4,WIFI_IOT_ADC_CUR_BAIS_DEFAULT,0)==WIFI_IOT_SUCCESS)

       {

           printf("data:%d",data);

           //128 1820

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

       }

       PwmStart(WIFI_IOT_PWM_PORT_PWM2,duty,PWM_FREQ_DIVITION);

       usleep(10000);

       PwmStop(WIFI_IOT_PWM_PORT_PWM2);

   }

}

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);