|
|
说明：
ADC的API注意事项比较多，几乎每个函数都有个注意事项，使用时要特别注意。
==============================================================================
##### ADC规格特性 #####
==============================================================================
1、16位，14位，12位，10位，8位分辨率配置。
2、规则通道转换完毕可以产生中断。3、单次和连续转换模式。
4、多通道扫描
5、数据对齐格式
6、编程采样时间
7、外部触发（定时器或EXTI）
8、支持DMA
9、双通道快速交替采样之间的延迟时间配置
10、ADC偏移值配置
11、ADC支持校准。
12、ADC支持规则通道转换额注入通道转换
13、ADC供电范围：1.62 V to 3.6 V
14、ADC输入电压范围：Vref- (连接到 Vssa) to Vref+ (连接到外部参考电压)。
==============================================================================
##### ADC驱动如何使用 #####
==============================================================================
1、有两个需要设置（这个问题待看手册了确认）
（1）ADC核心时钟
（2）ADC转换时钟
两种时钟源可供选择，可以选择AHB时钟，也可以选择来自系统时钟，PLL2或者PLL3的时钟。
比如使用PLL2:
RCC_PeriphClkInitTypeDef RCC_PeriphClkInit;
PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_ADC;
PeriphClkInit.AdcClockSelection = RCC_ADCCLKSOURCE_PLL2;
HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit);
2、ADC的时钟源和时钟分频通过函数HAL_ADC_Init()的参数ClockPrescaler可配置。
3、ADC引脚配置：
__HAL_RCC_GPIOx_CLK_ENABLE()
HAL_GPIO_Init()
4、配置ADC中断
（1）函数HAL_NVIC_EnableIRQ(ADCx_IRQn)
（2）函数ADCx_IRQHandler()调用HAL_ADC_IRQHandler()
5、配置ADC的DMA
（1）使用函数配置DMA的相关参数HAL_DMA_Init()
（2）使能DMA中断 HAL_NVIC_EnableIRQ(DMAx_Channelx_IRQn)
（3）中断函数里面调用DMAx_Channelx_IRQHandler()
6、规则通道相关的三个配置函数
HAL_ADC_Init()
HAL_ADC_ConfigChannel()
HAL_ADC_AnalogWDGConfig()
7、ADC的自动校准配置函数
HAL_ADCEx_Calibration_Start()
8、ADC数值获取
（1）查询方式
HAL_ADC_Start()
HAL_ADC_PollForConversion()
HAL_ADC_GetValue()
HAL_ADC_Stop()
（2）中断方式
HAL_ADC_Start_IT()
HAL_ADC_ConvCpltCallback()
HAL_ADC_GetValue()
HAL_ADC_Stop_IT()
（3）DMA方式
HAL_ADC_Start_DMA()
HAL_ADC_ConvCpltCallback() 和 HAL_ADC_ConvHalfCpltCallback()
HAL_ADC_Stop_DMA()
9、回调函数
HAL_ADC_ErrorCallback()
HAL_ADC_LevelOutOfWindowCallback() (callback of analog watchdog)
HAL_ADC_ConvCpltCallback()
HAL_ADC_ConvHalfCpltCallback
10、复位ADC
（1）复位ADC外设
__HAL_RCC_ADCx_FORCE_RESET(), __HAL_RCC_ADCx_RELEASE_RESET()
（2）函数可以复位相关引脚设计HAL_ADC_MspDeInit()。函数 __HAL_RCC_ADC_CLK_DISABLE(); 用于关闭ADC
（3）函数 __HAL_RCC_GPIOx_CLK_DISABLE()用于禁止ADC的IO
（4）函数HAL_NVIC_DisableIRQ(ADCx_IRQn)用于禁止ADC中断
（5）函数HAL_NVIC_DisableIRQ(DMAx_Channelx_IRQn)用于禁止ADC的DMA中断
源文件开头的等待时间配置：
- /* Delay to wait before setting ADEN once ADCAL has been reset
- must be at least 4 ADC clock cycles.
- Assuming lowest ADC clock (350 KHz according to DS), this
- 4 ADC clock cycles duration is equal to
- 4 / 350,000 = 0.011 ms.
- ADC_ENABLE_TIMEOUT set to 2 is a margin large enough to ensure
- the 4 ADC clock cycles have elapsed while waiting for ADRDY
- to become 1 */
- #define ADC_ENABLE_TIMEOUT ((uint32_t) 2) /*!< ADC enable time-out value */
- #define ADC_DISABLE_TIMEOUT ((uint32_t) 2) /*!< ADC disable time-out value */
- /* Timeout to wait for current conversion on going to be completed. */
- /* Timeout fixed to worst case, for 1 channel. */
- /* - maximum sampling time (830.5 adc_clk) */
- /* - ADC resolution (Tsar 16 bits= 16.5 adc_clk) */
- /* - ADC clock with prescaler 256 */
- /* 823 * 256 = 210688 clock cycles max */
- /* Unit: cycles of CPU clock. */
- #define ADC_CONVERSION_TIME_MAX_CPU_CYCLES ((uint32_t) 210688) /*!< ADC conversion completion time-out value */
1、函数HAL_StatusTypeDef HAL_ADC_Init(ADC_HandleTypeDef* hadc)
（1）调用此函数前优先把采用的使用AHB或者PLL2/PLL3配置好
（2）为了可以运行状态时随时配置，函数形参中状态的配置不要再使用HAL_ADC_STATE_RESET，这个复位状态仅需要在上电后调用一次HAL_ADC_MspInit就可以了，后续更新不需要再调用这个。
而用户要修改MSP配置，就必须在调用HAL_ADC_Init前调用 HAL_ADC_DeInit()。
（3）ADC1，ADC2和ADC3都是用此函数配置。
（4）如果更新ADC1，ADC2和ADC3的公共寄存器，需要关闭了所有ADC时才能更新。如果没有的话，函数并不会报告错误。在大家动态更新ADC配置时，容易出现这种情况。
2、函数HAL_ADC_DeInit
（1）切记，所有ADC都是用的同1个时钟，禁止时钟将复位所有ADC
（2）函数默认会设置DEEPPWD模式，降低功耗，函数是否设置此功能待考证。
3、函数
__weak void HAL_ADC_MspInit(ADC_HandleTypeDef* hadc)和__weak void HAL_ADC_MspDeInit(ADC_HandleTypeDef* hadc)
4、函数HAL_StatusTypeDef HAL_ADC_Start(ADC_HandleTypeDef* hadc)
（1）启动ADC，查询方式。（2）使能了multimode
a、如果ADC在从机模式，那么ADC将被使能，但是转换还没有开启
b、如果ADC在主机模式，那么ADC将被使能，且转换也已经开启。
5、函数HAL_StatusTypeDef HAL_ADC_Stop(ADC_HandleTypeDef* hadc)
（1）禁能ADC外设，停止ADC转换
（2）如果注入通道也在使用中，要优先调用函数HAL_ADCEx_InjectedStop
6、函数HAL_StatusTypeDef HAL_ADC_PollForConversion(ADC_HandleTypeDef* hadc, uint32_t Timeout)
（1）根据AUTDLY位的状态来检测和清除EOC或者EOS，而使用EOC还是EOS是由参数hadc->Init.EOCSelection决定的
（2）如果选择的EOC，不可以在DMA配置方式下调用此函数，因为DMA读取ADC的DR寄存器会立即复位EOC，判断时间太短，不靠谱。
7、函数HAL_StatusTypeDef HAL_ADC_PollForEvent(ADC_HandleTypeDef* hadc, uint32_t EventType, uint32_t Timeout)
（1）如果检测的某个标志位被设置，将被清除，除了ADC_FLAG_OVR。实际上，只有hadc->Init.Overrun设置为ADC_OVR_DATA_OVERWRITTEN，标志ADC_FLAG_OVR才会被清除
否则，只要OVR被清除，ADC的DR数据寄存器就会被新的转换数据覆盖。
（2）接收到数据后，用户可以调用函数__HAL_ADC_CLEAR_FLAG(hadc, ADC_FLAG_OVR)清除OVR标志。
8、函数HAL_StatusTypeDef HAL_ADC_Start_IT(ADC_HandleTypeDef* hadc)
（1）启动ADC转换，中断方式
（2）使能的三个中断：EOC (end of conversion), EOS (end of sequence), OVR overrun，这三个中断都有对应的回调函数。
（3）是个使能了multimode，函数必须先以从机模式调用，然后以主控模式调用
a、如果ADC在从机模式，那么ADC将被使能，但是转换还没有开启
b、如果ADC在主机模式，那么ADC将被使能，且转换也已经开启。
（4）为了保证获取所有转换后，合理的复用所有中断，需要调用函数AL_ADC_Stop_IT()来确保已经停止ADC中断方式。
（5）默认情况下函数HAL_ADC_Start_IT不会使能EOS中断，如果用户要使用，需要依次调用函数__HAL_ADC_CLEAR_FLAG(hadc, ADC_FLAG_EOSMP)和__HAL_ADC_ENABLE_IT(hadc, ADC_IT_EOSMP)。
9、函数HAL_ADC_Stop_IT
停止ADC转换，关闭中断，关闭ADC外设。
10、函数HAL_StatusTypeDef HAL_ADC_Start_DMA(ADC_HandleTypeDef* hadc, uint32_t* pData, uint32_t Length)
（1）启动ADC转换，DMA方式
（2）使能的DMA中断，overrun (if applicable), DMA half transfer, DMA transfer complete，每个中断都有回调函数。
（3）此函数是用于单ADC，而多ADC是调用函数HAL_ADCEx_MultiModeStart_DMA
11、函数HAL_StatusTypeDef HAL_ADC_Stop_DMA(ADC_HandleTypeDef* hadc)
（1）停止ADC转换，关闭DMA传输，关闭ADC外设。
（2）禁止ADC外设会停止潜在的注入通道转换，因此，如果注入通道在使用中，需要调用函数HAL_ADCEx_InjectedStop
（3）单ADC的停止函数是HAL_ADC_Stop_DMA，多ADC的是HAL_ADCEx_MultiModeStop_DMA
12、函数uint32_t HAL_ADC_GetValue(ADC_HandleTypeDef* hadc)
（1）读取ADC的DR寄存器，自动清除EOC
（2）此函数不会清除EOS，需要清除EOS，在函数HAL_ADC_IRQHandler()和HAL_ADC_PollForConversion()里面已经实现，或者调用函数_HAL_ADC_CLEAR_FLAG(&hadc, ADC_FLAG_EOS)
13、函数void HAL_ADC_IRQHandler(ADC_HandleTypeDef* hadc)
中断服务程序所调用
14、回调函数
__weak void HAL_ADC_ConvCpltCallback(ADC_HandleTypeDef* hadc)
__weak void HAL_ADC_ConvHalfCpltCallback(ADC_HandleTypeDef* hadc)
__weak void HAL_ADC_LevelOutOfWindowCallback(ADC_HandleTypeDef* hadc)
__weak void HAL_ADC_ErrorCallback(ADC_HandleTypeDef *hadc)
函数HAL_ADC_ErrorCallback使用要注意：为防止ADC DMA中的overrun错误，需要调用函数HAL_ADC_Stop_DMA复位配置，然后根据需要调用函数HAL_ADC_Start_DMA，此函数也会清除overrun标志
15、函数HAL_StatusTypeDef HAL_ADC_ConfigChannel(ADC_HandleTypeDef* hadc, ADC_ChannelConfTypeDef* sConfig)
（1）使用ADC的内部测量通道 Vbat/VrefInt/TempSensor，可以通过函数HAL_ADC_DeInit设置
（2）支持运行时更新ADC的参数
16、函数HAL_StatusTypeDef HAL_ADC_AnalogWDGConfig(ADC_HandleTypeDef* hadc, ADC_AnalogWDGConfTypeDef* AnalogWDGConfig)
（1）支持运行时更新ADC参数
（2）支持运行时修改ADC的阀值，修改后的值在下一次ADC EOC时才起作用。
（3）考虑到由于总线获得而造成的寄存器写入延迟，这可能会导致新设置阈值的有效时间不确定。
17、获取ADC状态和ADC错误信息
uint32_t HAL_ADC_GetState(ADC_HandleTypeDef* hadc)
uint32_t HAL_ADC_GetError(ADC_HandleTypeDef *hadc)
18、函数HAL_StatusTypeDef ADC_ConversionStop(ADC_HandleTypeDef* hadc, uint32_t ConversionGroup)
停止ADC转换
19、函数HAL_StatusTypeDef ADC_Enable(ADC_HandleTypeDef* hadc)
使用此函数的条件是ADC处于禁止状态，稳压器已经启动（在函数HAL_ADC_Init里面已经设置完毕）
20、函数HAL_StatusTypeDef ADC_Disable(ADC_HandleTypeDef* hadc)
使用此函数的条件是ADC转换已经停止
21、函数void ADC_DMAConvCplt(DMA_HandleTypeDef *hdma)
DMA传输完成回调函数
22、函数void ADC_DMAHalfConvCplt(DMA_HandleTypeDef *hdma)
DMA的半传输中断
23、函数void ADC_DMAError(DMA_HandleTypeDef *hdma)
DMA错误回调函数
结构体参数中断说明：
- /* Includes ------------------------------------------------------------------*/
- #include "stm32h7xx_hal_def.h"
- /** @addtogroup STM32H7xx_HAL_Driver
- * @{
- */
- /** @addtogroup ADC
- * @{
- */
- /* Exported types ------------------------------------------------------------*/
- /** @defgroup ADC_Exported_Types ADC Exported Types
- * @{
- */
- /**
- * @brief ADC Regular Conversion Oversampling structure definition
- */
- typedef struct
- {
- uint32_t Ratio; /*!< Configures the oversampling ratio. */
- uint32_t RightBitShift; /*!< Configures the division coefficient for the Oversampler.
- This parameter can be a value of @ref ADCEx_Right_Bit_Shift */
- uint32_t TriggeredMode; /*!< Selects the regular triggered oversampling mode.
- This parameter can be a value of @ref ADCEx_Triggered_Oversampling_Mode */
- uint32_t OversamplingStopReset; /*!< Selects the regular oversampling mode.
- The oversampling is either temporary stopped or reset upon an injected
- sequence interruption.
- If oversampling is enabled on both regular and injected groups, this parameter
- is discarded and forced to setting "ADC_REGOVERSAMPLING_RESUMED_MODE"
- (the oversampling buffer is zeroed during injection sequence).
- This parameter can be a value of @ref ADCEx_Regular_Oversampling_Mode */
- }ADC_OversamplingTypeDef;
- /**
- * @brief Structure definition of ADC instance and ADC group regular.
- * @note Parameters of this structure are shared within 2 scopes:
- * - Scope entire ADC (affects ADC groups regular and injected): ClockPrescaler, Resolution, DataAlign,
- * ScanConvMode, EOCSelection, LowPowerAutoWait.
- * - Scope ADC group regular: ContinuousConvMode, NbrOfConversion, DiscontinuousConvMode, NbrOfDiscConversion,
- * ExternalTrigConv, ExternalTrigConvEdge, DMAContinuousRequests, Overrun, OversamplingMode, Oversampling.
- * @note The setting of these parameters by function HAL_ADC_Init() is conditioned to ADC state.
- * ADC state can be either:
- * - For all parameters: ADC disabled
- * - For all parameters except 'LowPowerAutoWait', 'DMAContinuousRequests' and 'Oversampling': ADC enabled without conversion on going on group regular.
- * - For parameters 'LowPowerAutoWait' and 'DMAContinuousRequests': ADC enabled without conversion on going on groups regular and injected.
- * If ADC is not in the appropriate state to modify some parameters, these parameters setting is bypassed
- * without error reporting (as it can be the expected behavior in case of intended action to update another parameter
- * (which fulfills the ADC state condition) on the fly).
- */
- typedef struct
- {
- uint32_t ClockPrescaler; /*!< Select ADC clock source (synchronous clock derived from APB clock or asynchronous clock derived from System/PLL2/PLL3 clocks) and clock prescaler.
- This parameter can be a value of @ref ADC_ClockPrescaler.
- Note: The clock is common for all the ADCs.
- Note: In case of usage of channels on injected group, ADC frequency should be lower than AHB clock frequency /4 for resolution 16, 14, 12 or 10 bits,
- AHB clock frequency /3 for resolution 8 bits.
- Note: In case of synchronous clock mode based on HCLK/1, the configuration must be enabled only
- if the system clock has a 50% duty clock cycle (APB prescaler configured inside RCC
- must be bypassed and PCLK clock must have 50% duty cycle). Refer to reference manual for details.
- Note: In case of usage of the ADC dedicated PLL clock, it must be preliminarily enabled at RCC top level.
- Note: This parameter can be modified only if all ADCs are disabled. */
- uint32_t Resolution; /*!< Configure the ADC resolution.
- This parameter can be a value of @ref ADC_Resolution */
- uint32_t ScanConvMode; /*!< Configure the sequencer of ADC groups regular and injected.
- This parameter can be associated to parameter 'DiscontinuousConvMode' to have main sequence subdivided in successive parts.
- If disabled: Conversion is performed in single mode (one channel converted, the one defined in rank 1).
- Parameters 'NbrOfConversion' and 'InjectedNbrOfConversion' are discarded (equivalent to set to 1).
- If enabled: Conversions are performed in sequence mode (multiple ranks defined by 'NbrOfConversion' or 'InjectedNbrOfConversion' and rank of each channel in sequencer).
- Scan direction is upward: from rank 1 to rank 'n'.
- This parameter can be a value of @ref ADC_Scan_mode */
- uint32_t EOCSelection; /*!< Specify which EOC (End Of Conversion) flag is used for conversion by polling and interruption: end of unitary conversion or end of sequence conversions.
- This parameter can be a value of @ref ADC_EOCSelection. */
- FunctionalState LowPowerAutoWait; /*!< Select the dynamic low power Auto Delay: new conversion start only when the previous
- conversion (for ADC group regular) or previous sequence (for ADC group injected) has been retrieved by user software,
- using function HAL_ADC_GetValue() or HAL_ADCEx_InjectedGetValue().
- This feature automatically adapts the frequency of ADC conversions triggers to the speed of the system that reads the data. Moreover, this avoids risk of overrun
- for low frequency applications.
- This parameter can be set to ENABLE or DISABLE.
- Note: Do not use with interruption or DMA (HAL_ADC_Start_IT(), HAL_ADC_Start_DMA()) since they clear immediately the EOC flag
- to free the IRQ vector sequencer.
- Do use with polling: 1. Start conversion with HAL_ADC_Start(), 2. Later on, when ADC conversion data is needed:
- use HAL_ADC_PollForConversion() to ensure that conversion is completed and HAL_ADC_GetValue() to retrieve conversion result and trig another conversion start.
- (in case of usage of ADC group injected, use the equivalent functions HAL_ADCExInjected_Start(), HAL_ADCEx_InjectedGetValue(), ...). */
- FunctionalState ContinuousConvMode; /*!< Specify whether the conversion is performed in single mode (one conversion) or continuous mode for ADC group regular,
- after the first ADC conversion start trigger occurred (software start or external trigger).
- This parameter can be set to ENABLE or DISABLE. */
- uint32_t NbrOfConversion; /*!< Specify the number of ranks that will be converted within the regular group sequencer.
- To use the regular group sequencer and convert several ranks, parameter 'ScanConvMode' must be enabled.
- This parameter must be a number between Min_Data = 1 and Max_Data = 16.
- Note: This parameter must be modified when no conversion is on going on regular group (ADC disabled, or ADC enabled without
- continuous mode or external trigger that could launch a conversion). */
- FunctionalState DiscontinuousConvMode; /*!< Specify whether the conversions sequence of ADC group regular is performed in Complete-sequence/Discontinuous-sequence
- (main sequence subdivided in successive parts).
- Discontinuous mode is used only if sequencer is enabled (parameter 'ScanConvMode'). If sequencer is disabled, this parameter is discarded.
- Discontinuous mode can be enabled only if continuous mode is disabled. If continuous mode is enabled, this parameter setting is discarded.
- This parameter can be set to ENABLE or DISABLE. */
- uint32_t NbrOfDiscConversion; /*!< Specifies the number of discontinuous conversions in which the main sequence of ADC group regular (parameter NbrOfConversion) will be subdivided.
- If parameter 'DiscontinuousConvMode' is disabled, this parameter is discarded.
- This parameter must be a number between Min_Data = 1 and Max_Data = 8. */
- uint32_t ExternalTrigConv; /*!< Select the external event source used to trigger ADC group regular conversion start.
- If set to ADC_SOFTWARE_START, external triggers are disabled and software trigger is used instead.
- This parameter can be a value of @ref ADC_regular_external_trigger_source.
- Caution: external trigger source is common to all ADC instances. */
- uint32_t ExternalTrigConvEdge; /*!< Select the external event edge used to trigger ADC group regular conversion start.
- If trigger source is set to ADC_SOFTWARE_START, this parameter is discarded.
- This parameter can be a value of @ref ADC_regular_external_trigger_edge */
- uint32_t ConversionDataManagement; /*!< Specifies whether the Data conversion data is managed: using the DMA (oneshot or circular), or stored in the DR register or transfered to DFSDM register.
- Note: In continuous mode, DMA must be configured in circular mode. Otherwise an overrun will be triggered when DMA buffer maximum pointer is reached.
- This parameter can be a value of @ref ADC_ConversionDataManagement.
- Note: This parameter must be modified when no conversion is on going on both regular and injected groups
- (ADC disabled, or ADC enabled without continuous mode or external trigger that could launch a conversion). */
- uint32_t Overrun; /*!< Select the behavior in case of overrun: data overwritten or preserved (default).
- This parameter applies to ADC group regular only.
- This parameter can be a value of @ref ADC_Overrun.
- Note: In case of overrun set to data preserved and usage with programming model with interruption (HAL_Start_IT()): ADC IRQ handler has to clear
- end of conversion flags, this induces the release of the preserved data. If needed, this data can be saved in function
- HAL_ADC_ConvCpltCallback(), placed in user program code (called before end of conversion flags clear).
- Note: Error reporting with respect to the conversion mode:
- - Usage with ADC conversion by polling for event or interruption: Error is reported only if overrun is set to data preserved. If overrun is set to data
- overwritten, user can willingly not read all the converted data, this is not considered as an erroneous case.
- - Usage with ADC conversion by DMA: Error is reported whatever overrun setting (DMA is expected to process all data from data register). */
- uint32_t LeftBitShift; /*!< Configures the left shifting applied to the final result with or without oversampling.
- This parameter can be a value of @ref ADCEx_Left_Bit_Shift */
- FunctionalState BoostMode; /*!< Configures the Boost mode control.
- When selecting an analog ADC clock frequency bigger than 20MHz,
- it is mandatory to first enable the BOOST Mode.
- This parameter can be set to ENABLE or DISABLE. */
- FunctionalState OversamplingMode; /*!< Specify whether the oversampling feature is enabled or disabled.
- This parameter can be set to ENABLE or DISABLE.
- Note: This parameter can be modified only if there is no conversion is ongoing on ADC groups regular and injected */
- ADC_OversamplingTypeDef Oversampling; /*!< Specify the Oversampling parameters.
- Caution: this setting overwrites the previous oversampling configuration if oversampling is already enabled. */
- }ADC_InitTypeDef;
- /**
- * @brief Structure definition of ADC analog watchdog
- * @note The setting of these parameters by function HAL_ADC_AnalogWDGConfig() is conditioned to ADC state.
- * ADC state can be either:
- * ADC disabled or ADC enabled without conversion on going on ADC groups regular and injected.
- */
- typedef struct
- {
- uint32_t WatchdogNumber; /*!< Select which ADC analog watchdog is monitoring the selected channel.
- For Analog Watchdog 1: Only 1 channel can be monitored (or overall group of channels by setting parameter 'WatchdogMode')
- For Analog Watchdog 2 and 3: Several channels can be monitored (by successive calls of 'HAL_ADC_AnalogWDGConfig()' for each channel)
- This parameter can be a value of @ref ADCEx_analog_watchdog_number. */
- uint32_t WatchdogMode; /*!< Configure the ADC analog watchdog mode: single/all/none channels.
- For Analog Watchdog 1: Configure the ADC analog watchdog mode: single channel/all channels, ADC groups regular and/or injected.
- For Analog Watchdog 2 and 3: There is no configuration for all channels as AWD1. Set value 'ADC_ANALOGWATCHDOG_NONE' to reset
- channels group programmed with parameter 'Channel', set any other value to program the channel(s) to be monitored.
- This parameter can be a value of @ref ADCEx_analog_watchdog_mode. */
- uint32_t Channel; /*!< Select which ADC channel to monitor by analog watchdog.
- For Analog Watchdog 1: this parameter has an effect only if parameter 'WatchdogMode' is configured on single channel (only 1 channel can be monitored).
- For Analog Watchdog 2 and 3: Several channels can be monitored. To use this feature, call successively the function HAL_ADC_AnalogWDGConfig() for each channel to be added (or removed with value 'ADC_ANALOGWATCHDOG_NONE').
- This parameter can be a value of @ref ADC_channels. */
- FunctionalState ITMode; /*!< Specify whether the analog watchdog is configured in interrupt or polling mode.
- This parameter can be set to ENABLE or DISABLE */
- uint32_t HighThreshold; /*!< Configure the ADC analog watchdog High threshold value.
- Depending of ADC resolution selected (16, 14, 12, 10 or 8 bits), this parameter must be a number
- between Min_Data = 0x0000 and Max_Data = 0xFFFF, 0x3FFF, 0xFFF, 0x3FF or 0xFF respectively. */
- uint32_t LowThreshold; /*!< Configures the ADC analog watchdog Low threshold value.
- Depending of ADC resolution selected (16, 14, 12, or 8 bits), this parameter must be a number
- between Min_Data = 0x0000 and Max_Data = 0xFFFF, 0x3FFF, 0xFFF, 0x3FF or 0xFF respectively. */
- }ADC_AnalogWDGConfTypeDef;
|
|
发表于 2018-9-3 12:47:11
楼主
发表于 2018-9-4 23:20:54
