stm32basic/zadc.cpp

#include "zadc.hpp"
#ifdef HAL_ADC_MODULE_ENABLED
using namespace iflytop;
#define TAG "ADC"

zmutex g_adc_mutex = {"G_ADC_MUTEX"};

void ZADC::initialize(const char* name, ADC_HandleTypeDef* hadc1, int32_t channel, int32_t samplingTime) {
  if (!hadc1) return;
  m_hadc1        = hadc1;
  m_channel      = channel;
  m_samplingTime = samplingTime;
  inited         = true;
  m_name         = name;
  m_mutex.init();
  if (!g_adc_mutex.isInit()) {
    g_adc_mutex.init();
  }
}

int32_t ZADC::get_adc_value() {
  if (!inited) return 0;
  zlock_guard lck(g_adc_mutex);

  ADC_ChannelConfTypeDef sConfig = {0};
  sConfig.Channel                = m_channel; /* 通道 */
  sConfig.Rank                   = 1;
  sConfig.SamplingTime           = m_samplingTime; /* 采样时间 */

  if (HAL_ADC_ConfigChannel(m_hadc1, &sConfig) != HAL_OK) {
    ZLOGE(TAG, "%s HAL_ADC_ConfigChannel failed", m_name);
    return -1;
  }
  if (HAL_ADC_Start(m_hadc1) != HAL_OK) {
    ZLOGE(TAG, "%s HAL_ADC_Start failed", m_name);
    return -1;
  }
  HAL_ADC_PollForConversion(m_hadc1, 10);
  uint16_t adcv = HAL_ADC_GetValue(m_hadc1);
  HAL_ADC_Stop(m_hadc1);

  // ZLOGI(TAG, "%s ADC Value: %d", m_name, adcv);
  return adcv;
}

int32_t ZADC::get_adc_af_filter() {
  if (!inited) return 0;

  int32_t adc_value[14] = {0};

  for (int i = 0; i < 14; i++) {
    adc_value[i] = get_adc_value();
    osDelay(1);
  }

  // 排序
  for (int i = 0; i < 14; i++) {
    for (int j = 0; j < 14 - i - 1; j++) {
      if (adc_value[j] > adc_value[j + 1]) {
        int temp         = adc_value[j];
        adc_value[j]     = adc_value[j + 1];
        adc_value[j + 1] = temp;
      }
    }
  }

  // 求平均
  int sum = 0;
  for (int i = 2; i < 12; i++) {
    sum += adc_value[i];
  }
  return sum / 10;
}

void ZADC::setCacheVal(int32_t val) {
  if (!inited) return;
  {
    zlock_guard lck(m_mutex);
    m_cacheVal = val;
  }
}
int32_t ZADC::getCacheVal() {
  if (!inited) return 0;
  {
    zlock_guard lck(m_mutex);
    return m_cacheVal;
  }
}

void ZADC::updateAdcValToCache() {
  if (!inited) return;
  setCacheVal(get_adc_af_filter());
}

#endif