Bearpi开发板HarmonyOS之ADC采样

wifiiot_adc.h接口简介

创建任务1秒读取一次ADC

#include 
#include 
#include "ohos_init.h"
#include 
#include "cmsis_os2.h"
#include "wifiiot_gpio.h"
#include "wifiiot_gpio_ex.h"
#include "wifiiot_adc.h"
#include "wifiiot_errno.h"


static float get_voltage(void)
{
  unsigned int ret;
  unsigned short data;
  ret = AdcRead(WIFI_IOT_ADC_CHANNEL_5,&data,WIFI_IOT_ADC_EQU_MODEL_8,WIFI_IOT_ADC_CUR_BAIS_DEFAULT,0xff);
  if (ret != WIFI_IOT_SUCCESS) 
  {
    printf("ADC Read Fail\n");
  }
  return (float)data*1.8f*4/4096;
}

static void adc_func(void)
{
  
    GpioInit();
    IoSetPull(WIFI_IOT_IO_NAME_GPIO_11,WIFI_IOT_IO_PULL_UP);
     float voltage;
    
     
      while(1)
      {
         voltage = get_voltage();
         printf("voltage:%.3fV\n", voltage);

         osDelay(100);
       
      }
}

static void my_led_example(void)
{
   
    
     osThreadAttr_t attr;
     attr.attr_bits = 0;
     attr.name = "adc";
     attr.cb_mem = NULL;
     attr.cb_size = 0;
     attr.priority = 24;
     attr.stack_size = 1024*8;

     if(osThreadNew((osThreadFunc_t)adc_func,NULL,&attr) == NULL)
     {
        printf("Falied to create adc_func!\n");
    }
}

SYS_RUN(my_led_example);

• 运行效果,通过按键1改变电压值