STM32F4开发板----ADC（005）

谁践踏了优雅 2022-05-19 21:09 267阅读 0赞

# ADC的认识 #

# 1 ADC初始化参数 #

/* Exported types ------------------------------------------------------------*/
    
    /**
      * @brief   ADC Init structure definition  
      */
    typedef struct
    {
      uint32_t ADC_Resolution;                                 /*!< Configures the ADC resolution dual mode. This parameter can be a value of @ref ADC_resolution */                                   
      FunctionalState ADC_ScanConvMode;             /*!< Specifies whether the conversion is performed in Scan (multichannels)or Single (one channel) mode.
                                                                                       This parameter can be set to ENABLE or DISABLE */
      FunctionalState ADC_ContinuousConvMode;  /*!< Specifies whether the conversion is performed in Continuous or Single mode.
                                                                                       This parameter can be set to ENABLE or DISABLE. */
      uint32_t ADC_ExternalTrigConvEdge;          /*!< Select the external trigger edge and enable the trigger of a regular group.
                                                                               This parameter can be a value of
                                                                           @ref ADC_external_trigger_edge_for_regular_channels_conversion */
      uint32_t ADC_ExternalTrigConv;                  /*!< Select the external event used to trigger the start of conversion of a regular group.
                                                                               This parameter can be a value of
                                                                           @ref ADC_extrenal_trigger_sources_for_regular_channels_conversion */
      uint32_t ADC_DataAlign;                 /*!< Specifies whether the ADC data  alignment is left or right. This parameter can be
                                                                           a value of @ref ADC_data_align */
      uint8_t  ADC_NbrOfConversion;           /*!< Specifies the number of ADC conversions  that will be done using the sequencer for
                                                                           regular channel group.This parameter must range from 1 to 16. */
    }ADC_InitTypeDef;

涉及的相关参数：ADC分辨率（6/8/10/12位）、扫描或非扫描模式、连续或不连续转换、触发方式、对齐方式等。  
这里值得注意的是规则组转化序列不能超过16。

# 2 ADC通用初始化参数 #

/**
      * @brief   ADC Common Init structure definition  
      */
    typedef struct
    {
      uint32_t ADC_Mode;                      /*!< Configures the ADC to operate in
                                                   independent or multi mode.
                                                   This parameter can be a value of @ref ADC_Common_mode */                                              
      uint32_t ADC_Prescaler;                 /*!< Select the frequency of the clock
                                                   to the ADC. The clock is common for all the ADCs.
                                                   This parameter can be a value of @ref ADC_Prescaler */
      uint32_t ADC_DMAAccessMode;             /*!< Configures the Direct memory access
                                                  mode for multi ADC mode.
                                                   This parameter can be a value of
                                                   @ref ADC_Direct_memory_access_mode_for_multi_mode */
      uint32_t ADC_TwoSamplingDelay;          /*!< Configures the Delay between 2 sampling phases.
                                                   This parameter can be a value of
                                                   @ref ADC_delay_between_2_sampling_phases */
    
    }ADC_CommonInitTypeDef;

这里涉及相关ADC单独/多重模式选择，两采样阶段采样间隔，DMA使能/失能，ADC分屏系数（注意ADC的时钟频率不超过36Mhz）

# 3 ADC相关配置库函数 #

/* Function used to set the ADC configuration to the default reset state *****/  
    void ADC_DeInit(void);
    
    /* Initialization and Configuration functions *********************************/
    void ADC_Init(ADC_TypeDef* ADCx, ADC_InitTypeDef* ADC_InitStruct);
    void ADC_StructInit(ADC_InitTypeDef* ADC_InitStruct);
    void ADC_CommonInit(ADC_CommonInitTypeDef* ADC_CommonInitStruct);
    void ADC_CommonStructInit(ADC_CommonInitTypeDef* ADC_CommonInitStruct);
    void ADC_Cmd(ADC_TypeDef* ADCx, FunctionalState NewState);
    
    /* Analog Watchdog configuration functions ************************************/
    void ADC_AnalogWatchdogCmd(ADC_TypeDef* ADCx, uint32_t ADC_AnalogWatchdog);
    void ADC_AnalogWatchdogThresholdsConfig(ADC_TypeDef* ADCx, uint16_t HighThreshold,uint16_t LowThreshold);
    void ADC_AnalogWatchdogSingleChannelConfig(ADC_TypeDef* ADCx, uint8_t ADC_Channel);
    
    /* Temperature Sensor, Vrefint and VBAT management functions ******************/
    void ADC_TempSensorVrefintCmd(FunctionalState NewState);
    void ADC_VBATCmd(FunctionalState NewState);
    
    /* Regular Channels Configuration functions ***********************************/
    void ADC_RegularChannelConfig(ADC_TypeDef* ADCx, uint8_t ADC_Channel, uint8_t Rank, uint8_t ADC_SampleTime);
    void ADC_SoftwareStartConv(ADC_TypeDef* ADCx);
    FlagStatus ADC_GetSoftwareStartConvStatus(ADC_TypeDef* ADCx);
    void ADC_EOCOnEachRegularChannelCmd(ADC_TypeDef* ADCx, FunctionalState NewState);
    void ADC_ContinuousModeCmd(ADC_TypeDef* ADCx, FunctionalState NewState);
    void ADC_DiscModeChannelCountConfig(ADC_TypeDef* ADCx, uint8_t Number);
    void ADC_DiscModeCmd(ADC_TypeDef* ADCx, FunctionalState NewState);
    uint16_t ADC_GetConversionValue(ADC_TypeDef* ADCx);
    uint32_t ADC_GetMultiModeConversionValue(void);
    
    /* Regular Channels DMA Configuration functions *******************************/
    void ADC_DMACmd(ADC_TypeDef* ADCx, FunctionalState NewState);
    void ADC_DMARequestAfterLastTransferCmd(ADC_TypeDef* ADCx, FunctionalState NewState);
    void ADC_MultiModeDMARequestAfterLastTransferCmd(FunctionalState NewState);
    
    /* Injected channels Configuration functions **********************************/
    void ADC_InjectedChannelConfig(ADC_TypeDef* ADCx, uint8_t ADC_Channel, uint8_t Rank, uint8_t ADC_SampleTime);
    void ADC_InjectedSequencerLengthConfig(ADC_TypeDef* ADCx, uint8_t Length);
    void ADC_SetInjectedOffset(ADC_TypeDef* ADCx, uint8_t ADC_InjectedChannel, uint16_t Offset);
    void ADC_ExternalTrigInjectedConvConfig(ADC_TypeDef* ADCx, uint32_t ADC_ExternalTrigInjecConv);
    void ADC_ExternalTrigInjectedConvEdgeConfig(ADC_TypeDef* ADCx, uint32_t ADC_ExternalTrigInjecConvEdge);
    void ADC_SoftwareStartInjectedConv(ADC_TypeDef* ADCx);
    FlagStatus ADC_GetSoftwareStartInjectedConvCmdStatus(ADC_TypeDef* ADCx);
    void ADC_AutoInjectedConvCmd(ADC_TypeDef* ADCx, FunctionalState NewState);
    void ADC_InjectedDiscModeCmd(ADC_TypeDef* ADCx, FunctionalState NewState);
    uint16_t ADC_GetInjectedConversionValue(ADC_TypeDef* ADCx, uint8_t ADC_InjectedChannel);
    
    /* Interrupts and flags management functions **********************************/
    void ADC_ITConfig(ADC_TypeDef* ADCx, uint16_t ADC_IT, FunctionalState NewState);
    FlagStatus ADC_GetFlagStatus(ADC_TypeDef* ADCx, uint8_t ADC_FLAG);
    void ADC_ClearFlag(ADC_TypeDef* ADCx, uint8_t ADC_FLAG);
    ITStatus ADC_GetITStatus(ADC_TypeDef* ADCx, uint16_t ADC_IT);
    void ADC_ClearITPendingBit(ADC_TypeDef* ADCx, uint16_t ADC_IT);