ozone_cp/APP/adc.c

#include "adc.h"
/***********************************************************************************************************************
 * =====================================================adc======================================================
 **
 ***********************************************************************************************************************/
// uint16_t meanvalue;
adc_t adc={0};
void ADCInit(void) {
  ADC_InitStruType x;
  GPIO_InitSettingType y;

  y.Signal = GPIO_Pin_Signal_Analog; //ģ��
  y.Dir = GPIO_Direction_Input;      //����
  y.Func = GPIO_Reuse_Func0;
  // GPIO_Init(GPIO_Pin_B9, &y);
  GPIO_Init(GPIO_Pin_A2, &y);

  //������Ƶ�Ժ�Tadclk=1/(PCLK/4)Լ����0.083us
  x.CLKS = ADC_CLKS_PCLK;
  x.CLKDIV = ADC_CLKDIV_1_4; /* ADCʱ��ԴԤ��Ƶ */

  //�ɼ�����ģ����*3.3/4096=���ڵĵ�ѹ

  x.VREF_SEL = ADC_VREF_SEL_0; /* �ڲ��ο���ѹ2.048v,�����ڲ��ο���ѹΪ���� */
  x.VREFP = ADC_VREFP_VDD; /* ѡ��оƬ�Ĺ�����ѹVDD��adc�IJο���ѹΪ���� */
  x.VREFN = ADC_VREFN_VSS; /* �����ο���ѹѡ�� */
  // x.CHS = ADC_CHS_AIN4;
  x.CHS = ADC_CHS_AIN8;
  x.SMPS = ADC_SMPS_SOFT; /* AD����ģʽΪ�������� */
  //����ʱ��st*2+1(��Tadclk)=1.743us
  x.ST = 10;                /* AD����ʱ��ѡ�� */
  x.BITSEL = ADC_BITSEL_12; /* AD�ֱ���12λ */
  ADC_Init(&x);
}

uint16_t get_adc_value(void) {
  uint16_t adc_value;
  ADC_SoftStart();
  while (ADC_GetConvStatus() == SET)
    ; //����ת��
  adc_value = ADC_GetConvValue();
  ADC_SoftStop();
  return adc_value;
}

void adc_loop_gather(void) {
  static uint32_t adc_ticket = 0;
  uint16_t adc_value = 0;
  if (port_haspassedms(adc_ticket) > 500) {
    adc_ticket = get_sys_ticket();
    adc_value = get_adc_value();
    adc.adc_value_buff[adc.adc_value_count++] = adc_value;
    if (adc.adc_value_count == 5) {
      adc.past_count_reached_five = true;
      adc.adc_value_count = 0;
    }
    if (adc.past_count_reached_five == true) {
      beg_average_value(adc.adc_value_buff);
    }
  }
}

void beg_average_value(uint16_t *adc_buff) {
  uint16_t adc_average_value = 0;
  uint32_t adc_sum_value = 0;
  for (int i = 0; i < 5; i++) {
    adc_sum_value += *adc_buff;
    adc_buff++;
  }
  adc_average_value = adc_sum_value / 5;
  if (adc_average_value <= 16 || adc.abnormal_state == true) {
    adc.abnormal_state = true;
    process_voltage_abnormal();
    // printf("short out%d\r\n", adc_average_value); //��·
  } else {
    // printf("adc_value_t%d\r\n",
          //  adc_average_value); //����adc_value=1700����ѹ=1700/4096=1.369
  }
}