5.1 ADC 使用说明

void RCC_Configuration(void)
{
    /* Enable peripheral clocks ------------------------------------------------*/

    /* Enable GPIO clocks */
    RCC_EnableAPBPeriphClk(RCC_APB_PERIPH_GPIO, ENABLE);
    /* Enable ADC clocks */
    RCC_EnableAHBPeriphClk(RCC_AHB_PERIPH_ADC, ENABLE);
    
    /* RCC_ADCHCLK_DIV4*/
    ADC_ClockModeConfig(RCC_ADCHCLK_DIV4);
}

    GPIO_InitStruct(&GPIO_InitStructure);
    /* Configure PA0 PA1 as analog input -----------------------*/
    GPIO_InitStructure.Pin       = GPIO_PIN_0 | GPIO_PIN_1;
    GPIO_InitStructure.GPIO_Mode = GPIO_MODE_ANALOG;
    GPIO_InitPeripheral(GPIOA, &GPIO_InitStructure);

    ADC_InitStruct(&ADC_InitStructure);
    /* ADC configuration ------------------------------------------------------*/
    ADC_InitStructure.ContinueConvEn = DISABLE;
    /* Initialize the ExtTrigSelect1 member */
    ADC_InitStructure.ExtTrigSelect1 = ADC_EXT_TRIGCONV_SWSTRRCH;
    /* Initialize the DatAlign member */
    ADC_InitStructure.DatAlign       = ADC_DAT_ALIGN_R;
    /* Initialize the phase mode member */
    ADC_InitStructure.PhsMode        = ADC_PHS_TRG_MODE_SINGLE ;
    /* Initialize the phase 1 channel number member */
    ADC_InitStructure.Phs1ChNumber   = 1U;
    /* Initialize the phase 2 channel number member */
    ADC_InitStructure.Phs2ChNumber   = 1U;
    /* Initialize the phase 3 channel number member */
    ADC_InitStructure.Phs3ChNumber   = 1U;
    /* Initialize the phase 4 channel number member */
    ADC_InitStructure.Phs4ChNumber   = 1U;
    ADC_Init(&ADC_InitStructure);

    /* Enable ADC */
    ADC_Enable(ENABLE);
    /*Check ADC Ready*/
    while(ADC_GetFlagStatus(ADC_FLAG_RDY) == RESET)
        ;

    uint16_t dat;
    
    ADC_ConfigRegularChannel(ADC_Channel, 1, ADC_SAMP_TIME_72CYCLES);
    /* Start ADC Software Conversion */
    ADC_EnableChannelStartConv(ADC_SWSTRRCH_PHS1_START);
    while(ADC_GetFlagStatus(ADC_FLAG_ENDC)==0){
    }
    ADC_ClearFlag(ADC_FLAG_ENDC);
    ADC_ClearFlag(ADC_FLAG_STR);
    dat=ADC_GetDat();
    
    return dat;

/*xx mv per degree Celsius  by datasheet define*/
#define AVG_SLOPE  0.00407f


//#define VDDA_5V
#ifdef  VDDA_5V
#define  VREF_VALUE      (5.0)      //this value need be configured by the actual voltage reference. 
#define  VTS_CODE_ADDR   (0x1FFFF048U)
#else
#define  VREF_VALUE      (3.3)
#define  VTS_CODE_ADDR   (0x1FFFF048U)
#endif

    ADC_EnableTempSensor(ENABLE);
    /* Enable ADC */
    ADC_Enable(ENABLE);
    /*Check ADC Ready*/
    while(ADC_GetFlagStatus(ADC_FLAG_RDY) == RESET)
        ;

    ADC_ConfigRegularChannel(ADC_Channel, 1, ADC_SAMP_TIME_400CYCLES);
    /* Start ADC Software Conversion */
    ADC_EnableChannelStartConv(ADC_SWSTRRCH_PHS1_START);
    while(ADC_GetFlagStatus(ADC_FLAG_ENDCA)==0){
    }
    ADC_ClearFlag(ADC_FLAG_ENDCA);
    ADC_ClearFlag(ADC_FLAG_STR);
    dat=ADC_GetDat();

    float Temperate,tempValue,VTS;
    uint32_t TSValue;
    /* Voltage value of temperature sensor */
    tempValue=TempAdVal*(VREF_VALUE/4095);

    /* Get the temperature inside the chip */
    Temperate= (VTS-tempValue)/AVG_SLOPE + 30;
    return Temperate;

    NVIC_InitStructure.NVIC_IRQChannel                   = ADC_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPriority           = 0;
    NVIC_InitStructure.NVIC_IRQChannelCmd                = ENABLE;
    NVIC_Init(&NVIC_InitStructure);

    ADC_ConfigRegularChannel(ADC_Channel_03_PA3, 1, ADC_SAMP_TIME_72CYCLES);
    
    /*Enable anolog watchdog*/
    ADC_ConfigInt(ADC_INT_AWD, ENABLE);
    ADC_ConfigAnalogWatchdogThresholds(HIGH_THRESHOLD, LOW_THRESHOLD);
    /*Enable DAT0 watchdog*/
    ADC_ConfigAnalogWatchdogModeChannel(ADC_ANALOG_WTDG_DAT0);
    /* Anolog watchdog monitor DAT0 enable */
    ADC_Enable(ENABLE);

void ADC_IRQHandler(void)
{
   if(ADC_GetIntStatus(ADC_INT_FLAG_AWDG) != RESET)
   {
       ADC_ClearIntPendingBit(ADC_INT_FLAG_AWDG);
       gCntAwdg++;
   }
}

    ADC_InitStruct(&ADC_InitStructure);
    /* ADC configuration ------------------------------------------------------*/
    ADC_InitStructure.ContinueConvEn = DISABLE;
    /* Initialize the ExtTrigSelect1 member */
    ADC_InitStructure.ExtTrigSelect1 = ADC_EXT_TRIGCONV_EXT_LINE;
    /* Initialize the DatAlign member */
    ADC_InitStructure.DatAlign       = ADC_DAT_ALIGN_R;
    /* Initialize the phase mode member */
    ADC_InitStructure.PhsMode        = ADC_PHS_TRG_MODE_SINGLE ;
    /* Initialize the phase 1 channel number member */
    ADC_InitStructure.Phs1ChNumber   = 2U;

    //select EXTI1 as adc triagger source
    AFIO_ConfigADCExternalTrigRemap(AFIO_ADC_TRIG_EXTI_1);

    //ExtTrigSelect1 exti
    ADC_ConfigRegularChannel(ADC_Channel_00_PA0, 1, ADC_SAMP_TIME_72CYCLES);
    ADC_ConfigRegularChannel(ADC_Channel_01_PA1, 2, ADC_SAMP_TIME_72CYCLES);

        while(ADC_GetFlagStatus(ADC_FLAG_ENDC)==0){
        }
        ADC_ClearFlag(ADC_FLAG_ENDC);
        ADC_ClearFlag(ADC_FLAG_STR);
        ADCConvertedValue[0] =ADC_GetGroupConvDat(0);
        ADCConvertedValue[1] =ADC_GetGroupConvDat(1);

    GPIO_ConfigEXTILine(GPIOA_PORT_SOURCE,GPIO_PIN_SOURCE4);
    /* EXTI line10 configuration -----------------------------------------------*/
    EXTI_InitStructure.EXTI_Mode    = EXTI_Mode_Event;
    EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
    EXTI_InitStructure.EXTI_Line    = EXTI_LINE1;
    EXTI_InitStructure.EXTI_LineCmd = ENABLE;
    EXTI_InitPeripheral(&EXTI_InitStructure);

    /* Initialize the ExtTrigSelect1 member */
    ADC_InitStructure.ExtTrigSelect1 = ADC_EXT_TRIGCONV_T1_CC1;
    /* Initialize the ExtTrigSelect2 member */
    ADC_InitStructure.ExtTrigSelect2 = ADC_EXT_TRIGCONV_T1_CC2;
    /* Initialize the ExtTrigSelect3 member */
    ADC_InitStructure.ExtTrigSelect3 = ADC_EXT_TRIGCONV_T1_CC3;
    /* Initialize the ExtTrigSelect4 member */
    ADC_InitStructure.ExtTrigSelect4 = ADC_EXT_TRIGCONV_T1_CC4;
    /* Initialize the DatAlign member */
    ADC_InitStructure.DatAlign       = ADC_DAT_ALIGN_R;
    /* Initialize the phase mode member */
    ADC_InitStructure.PhsMode        = ADC_PHS_TRG_MODE_FOUR ;
    /* Initialize the phase 1 channel number member */
    ADC_InitStructure.Phs1ChNumber   = 2U;

    //PH1
    ADC_ConfigRegularChannel(ADC_Channel_01_PA1,1,ADC_SAMP_TIME_4CYCLES);
    ADC_ConfigRegularChannel(ADC_Channel_04_PA4,2,ADC_SAMP_TIME_4CYCLES);
    //PH2
    ADC_ConfigRegularChannel(ADC_Channel_00_PA0,3,ADC_SAMP_TIME_4CYCLES);
    //PH3
    ADC_ConfigRegularChannel(ADC_Channel_08_PB0,4,ADC_SAMP_TIME_4CYCLES);
    //PH4
    ADC_ConfigRegularChannel(ADC_Channel_09_PB1,5,ADC_SAMP_TIME_4CYCLES);

    /* Configure PB3-CH1 as alternate function push-pull mode ----*/
    GPIO_InitStructure.Pin       = GPIO_PIN_3;
    GPIO_InitStructure.GPIO_Mode = GPIO_MODE_AF_PP;
    GPIO_InitStructure.GPIO_Alternate =GPIO_AF1;
    GPIO_InitPeripheral(GPIOB, &GPIO_InitStructure);
    
    /* Configure PB4-CH2 as alternate function push-pull mode ----*/
    GPIO_InitStructure.Pin       = GPIO_PIN_4;
    GPIO_InitStructure.GPIO_Mode = GPIO_MODE_AF_PP;
    GPIO_InitStructure.GPIO_Alternate =GPIO_AF7;
    GPIO_InitPeripheral(GPIOB, &GPIO_InitStructure);

    PrescalerValue = (uint32_t)(SystemCoreClock / 160000) - 1;
    /* Time base configuration */
    TIM_InitTimBaseStruct(&TIM_TimeBaseStructure);
    TIM_TimeBaseStructure.Period    = 1600;
    TIM_TimeBaseStructure.Prescaler = PrescalerValue;
    TIM_TimeBaseStructure.ClkDiv    = TIM_CLK_DIV1;
    TIM_TimeBaseStructure.CounterMode   = TIM_CNT_MODE_CENTER_ALIGN3;
    TIM_InitTimeBase(TIM1, &TIM_TimeBaseStructure);

    /* PWM1 Mode configuration: Channel1 */
    TIM_InitOcStruct(&TIM_OCInitStructure);
    TIM_OCInitStructure.OCMode      = TIM_OCMODE_PWM1;
    TIM_OCInitStructure.OutputState = TIM_OUTPUT_STATE_ENABLE;
    TIM_OCInitStructure.Pulse       = Pluse1_Val;
    TIM_OCInitStructure.OCPolarity  = TIM_OC_POLARITY_HIGH;
    TIM_InitOc1(TIM1, &TIM_OCInitStructure);
    TIM_ConfigOc1Preload(TIM1, TIM_OC_PRE_LOAD_ENABLE);

void ADC_IRQHandler(void)
{
    if(ADC_GetIntStatus(ADC_INT_FLAG_PHS4) != RESET)
    {
       ADC_ClearIntPendingBit(ADC_INT_FLAG_PHS4);
       GPIOB->PBSC = GPIO_PIN_7;
       //Get PA1, PA4, PA0, PB0, PB1 conversion value
       ADCConvertedValue[index++] = ADC_GetGroupConvDat(0);
       ADCConvertedValue[index++] = ADC_GetGroupConvDat(1);
       ADCConvertedValue[index++] = ADC_GetGroupConvDat(2);
       ADCConvertedValue[index++] = ADC_GetGroupConvDat(3);
       ADCConvertedValue[index++] = ADC_GetGroupConvDat(4);
       if(index >= 28)
       {
          index = 0;
       }
       GPIOB->PBC = GPIO_PIN_7;
    }

}