ozone_cp/APP/adc.c

#include "adc.h"
static float prv_adc_get_value();
// uint16_t meanvalue;
ADC_InitStruType x;
GPIO_InitSettingType y;
bool adccapture_error = false;
static void prv_adc_pa2_init() {
  y.Signal = GPIO_Pin_Signal_Analog;  //模拟
  y.Dir = GPIO_Direction_Input;       //输入
  y.Func = GPIO_Reuse_Func0;
  // x.CHS设置adc采集的通道每个引脚对应一个通道
  GPIO_Init(GPIO_Pin_A2, &y);

  //经过分频以后Tadclk=1/(PCLK/4)约等于0.083us
  x.CLKS = ADC_CLKS_PCLK;
  x.CLKDIV = ADC_CLKDIV_1_32; /* ADC时钟源预分频 */

  //采集到的模拟量*3.3/4096=现在的电压
  x.VREF_SEL = ADC_VREF_SEL_0; /* 内部参考电压2.048v,仅设置内部参考电压为多少 */
  x.VREFP = ADC_VREFP_VDD; /* 选择芯片的工作电压VDD，这个是设置adc具体是要哪个电压来做参考adc的参考电压为多少 */
  x.VREFN = ADC_VREFN_VSS; /* 负向参考电压选择 */
  x.CHS = ADC_CHS_AIN8;
  x.SMPS = ADC_SMPS_SOFT; /* AD采样模式为软件控制 */
  //采样时间st*2+1(个Tadclk)=1.743us
  x.ST = 10;                /* AD硬件采样时间选择 */
  x.BITSEL = ADC_BITSEL_12; /* AD分辨率12位 */
  ADC_Init(&x);
  prv_adc_get_value();
}
static void prv_adc_pb8_init() {
  y.Signal = GPIO_Pin_Signal_Analog;  //模拟
  y.Dir = GPIO_Direction_Input;       //输入
  y.Func = GPIO_Reuse_Func0;
  // x.CHS设置adc采集的通道每个引脚对应一个通道
  GPIO_Init(GPIO_Pin_B8, &y);

  //经过分频以后Tadclk=1/(PCLK/4)约等于0.083us
  x.CLKS = ADC_CLKS_PCLK;
  x.CLKDIV = ADC_CLKDIV_1_32; /* ADC时钟源预分频 */

  //采集到的模拟量*3.3/4096=现在的电压
  x.VREF_SEL = ADC_VREF_SEL_0; /* 内部参考电压2.048v,仅设置内部参考电压为多少 */
  x.VREFP = ADC_VREFP_VDD; /* 选择芯片的工作电压VDD，这个是设置adc具体是要哪个电压来做参考adc的参考电压为多少 */
  x.VREFN = ADC_VREFN_VSS; /* 负向参考电压选择 */
  x.CHS = ADC_CHS_AIN3;
  x.SMPS = ADC_SMPS_SOFT; /* AD采样模式为软件控制 */
  //采样时间st*2+1(个Tadclk)=1.743us
  x.ST = 10;                /* AD硬件采样时间选择 */
  x.BITSEL = ADC_BITSEL_12; /* AD分辨率12位 */
  ADC_Init(&x);
  prv_adc_get_value();
}

static void prv_adc_pb9_init() {
  y.Signal = GPIO_Pin_Signal_Analog;  //模拟
  y.Dir = GPIO_Direction_Input;       //输入
  y.Func = GPIO_Reuse_Func0;
  // x.CHS设置adc采集的通道每个引脚对应一个通道
  GPIO_Init(GPIO_Pin_B9, &y);

  //经过分频以后Tadclk=1/(PCLK/32)
  x.CLKS = ADC_CLKS_PCLK;
  x.CLKDIV = ADC_CLKDIV_1_32; /* ADC时钟源预分频 */

  //采集到的模拟量*3.3/4096=现在的电压
  x.VREF_SEL = ADC_VREF_SEL_0; /* 内部参考电压2.048v,仅设置内部参考电压为多少 */
  x.VREFP = ADC_VREFP_VDD; /* 选择芯片的工作电压VDD，这个是设置adc具体是要哪个电压来做参考adc的参考电压为多少 */
  x.VREFN = ADC_VREFN_VSS; /* 负向参考电压选择 */
  x.CHS = ADC_CHS_AIN4;
  // x.CHS = ADC_CHS_AIN8;
  x.SMPS = ADC_SMPS_SOFT; /* AD采样模式为软件控制 */
  //采样时间st*2+1(个Tadclk)=1.743us
  x.ST = 10;                /* AD硬件采样时间选择 */
  x.BITSEL = ADC_BITSEL_12; /* AD分辨率12位 */
  ADC_Init(&x);
  prv_adc_get_value();
}

static float prv_adc_get_value() {
  ErrorStatus status = ADC_SoftStart();
  adccapture_error = false;
  if (status != SUCCESS) {
    adccapture_error = true;
    return 0;
  }
  uint32_t inticket = get_sys_ticket();

  while (ADC_GetConvStatus() != RESET) {
    if (port_haspassedms(inticket) > 10) {
      // printf("prv_adc_get_value ch:%d\n", x.CHS);
      // printf("fail\n", x.CHS);
      adccapture_error = true;
      return 0;
    }
  }
  // printf("success %d\n", port_haspassedms(inticket));

  uint16_t adcv = ADC_GetConvValue();
  ADC_SoftStop();
  // printf("success\n", x.CHS);

  // printf("%d\r\n", adcv);
  return adcv * 3.3 / 4096;
}

static float prv_adc_get_value_average(int average) {
  if (average == 0) {
    average = 1;
  }
  float value = 0;
  for (size_t i = 0; i < average; i++) {
    value += prv_adc_get_value();
  }
  return value / average;
}

float adc_get_value_pa2(void) {
  prv_adc_pa2_init();
  return prv_adc_get_value_average(AVERAGE_TABLE_SIZE);
}
float adc_get_value_pb8(void) {
  prv_adc_pb8_init();
  return prv_adc_get_value_average(AVERAGE_TABLE_SIZE);
}
float adc_get_value_pb9(void) {
  prv_adc_pb9_init();
  return prv_adc_get_value_average(AVERAGE_TABLE_SIZE);
}

float adc_get_value_pa2_filter(float factor) {
  static float last = 0;
  float now_raw = adc_get_value_pa2();
  if (adccapture_error) {
    return last;
  }
  float now = ((float)last * (1.0f - factor)) + ((float)now_raw * factor);
  last = now;
  return now;
}
float adc_get_value_pb8_filter(float factor) {
  static float last = 0;
  float now_raw = adc_get_value_pb8();
  if (adccapture_error) {
    return last;
  }
  float now = ((float)last * (1.0f - factor)) + ((float)now_raw * factor);
  last = now;

  return now;
}
float adc_get_value_pb9_filter(float factor) {
  static float last = 0;
  float now_raw = adc_get_value_pb9();
  if (adccapture_error) {
    return last;
  }
  float now = ((float)last * (1.0f - factor)) + ((float)now_raw * factor);
  last = now;
  return now;
}