SMARTCARD HAL module driver. This file provides firmware functions to manage the following functionalities of the SMARTCARD peripheral: More...
#include "stm32h7xx_hal.h"
Detailed Description

SMARTCARD HAL module driver. This file provides firmware functions to manage the following functionalities of the SMARTCARD peripheral:
Author
MCD Application Team
Initialization and de-initialization functions
IO operation functions
Peripheral Control functions
Peripheral State and Error functions
Attention
This software is licensed under terms that can be found in the LICENSE file in the root directory of this software component. If no LICENSE file comes with this software, it is provided AS-IS.
==============================================================================
                      ##### How to use this driver #####
==============================================================================
[..]
  The SMARTCARD HAL driver can be used as follows:

  (#) Declare a SMARTCARD_HandleTypeDef handle structure (eg. SMARTCARD_HandleTypeDef hsmartcard).
  (#) Associate a USART to the SMARTCARD handle hsmartcard.
  (#) Initialize the SMARTCARD low level resources by implementing the HAL_SMARTCARD_MspInit() API:
      (++) Enable the USARTx interface clock.
      (++) USART pins configuration:
           (+++) Enable the clock for the USART GPIOs.
           (+++) Configure the USART pins (TX as alternate function pull-up, RX as alternate function Input).
      (++) NVIC configuration if you need to use interrupt process (HAL_SMARTCARD_Transmit_IT()
           and HAL_SMARTCARD_Receive_IT() APIs):
           (+++) Configure the USARTx interrupt priority.
           (+++) Enable the NVIC USART IRQ handle.
      (++) DMA Configuration if you need to use DMA process (HAL_SMARTCARD_Transmit_DMA()
           and HAL_SMARTCARD_Receive_DMA() APIs):
           (+++) Declare a DMA handle structure for the Tx/Rx channel.
           (+++) Enable the DMAx interface clock.
           (+++) Configure the declared DMA handle structure with the required Tx/Rx parameters.
           (+++) Configure the DMA Tx/Rx channel.
           (+++) Associate the initialized DMA handle to the SMARTCARD DMA Tx/Rx handle.
           (+++) Configure the priority and enable the NVIC for the transfer complete
                 interrupt on the DMA Tx/Rx channel.

  (#) Program the Baud Rate, Parity, Mode(Receiver/Transmitter), clock enabling/disabling and accordingly,
      the clock parameters (parity, phase, last bit), prescaler value, guard time and NACK on transmission
      error enabling or disabling in the hsmartcard handle Init structure.

  (#) If required, program SMARTCARD advanced features (TX/RX pins swap, TimeOut, auto-retry counter,...)
      in the hsmartcard handle AdvancedInit structure.

  (#) Initialize the SMARTCARD registers by calling the HAL_SMARTCARD_Init() API:
      (++) This API configures also the low level Hardware GPIO, CLOCK, CORTEX...etc)
           by calling the customized HAL_SMARTCARD_MspInit() API.
      [..]
      (@) The specific SMARTCARD interrupts (Transmission complete interrupt,
           RXNE interrupt and Error Interrupts) will be managed using the macros
           __HAL_SMARTCARD_ENABLE_IT() and __HAL_SMARTCARD_DISABLE_IT() inside the transmit and receive process.

  [..]
  [..] Three operation modes are available within this driver :

   *** Polling mode IO operation ***
   =================================
   [..]
     (+) Send an amount of data in blocking mode using HAL_SMARTCARD_Transmit()
     (+) Receive an amount of data in blocking mode using HAL_SMARTCARD_Receive()

   *** Interrupt mode IO operation ***
   ===================================
   [..]
     (+) Send an amount of data in non-blocking mode using HAL_SMARTCARD_Transmit_IT()
     (+) At transmission end of transfer HAL_SMARTCARD_TxCpltCallback() is executed and user can
          add his own code by customization of function pointer HAL_SMARTCARD_TxCpltCallback()
     (+) Receive an amount of data in non-blocking mode using HAL_SMARTCARD_Receive_IT()
     (+) At reception end of transfer HAL_SMARTCARD_RxCpltCallback() is executed and user can
          add his own code by customization of function pointer HAL_SMARTCARD_RxCpltCallback()
     (+) In case of transfer Error, HAL_SMARTCARD_ErrorCallback() function is executed and user can
          add his own code by customization of function pointer HAL_SMARTCARD_ErrorCallback()

   *** DMA mode IO operation ***
   ==============================
   [..]
     (+) Send an amount of data in non-blocking mode (DMA) using HAL_SMARTCARD_Transmit_DMA()
     (+) At transmission end of transfer HAL_SMARTCARD_TxCpltCallback() is executed and user can
          add his own code by customization of function pointer HAL_SMARTCARD_TxCpltCallback()
     (+) Receive an amount of data in non-blocking mode (DMA) using HAL_SMARTCARD_Receive_DMA()
     (+) At reception end of transfer HAL_SMARTCARD_RxCpltCallback() is executed and user can
          add his own code by customization of function pointer HAL_SMARTCARD_RxCpltCallback()
     (+) In case of transfer Error, HAL_SMARTCARD_ErrorCallback() function is executed and user can
          add his own code by customization of function pointer HAL_SMARTCARD_ErrorCallback()

   *** SMARTCARD HAL driver macros list ***
   ========================================
   [..]
     Below the list of most used macros in SMARTCARD HAL driver.

     (+) __HAL_SMARTCARD_GET_FLAG : Check whether or not the specified SMARTCARD flag is set
     (+) __HAL_SMARTCARD_CLEAR_FLAG : Clear the specified SMARTCARD pending flag
     (+) __HAL_SMARTCARD_ENABLE_IT: Enable the specified SMARTCARD interrupt
     (+) __HAL_SMARTCARD_DISABLE_IT: Disable the specified SMARTCARD interrupt
     (+) __HAL_SMARTCARD_GET_IT_SOURCE: Check whether or not the specified SMARTCARD interrupt is enabled

   [..]
     (@) You can refer to the SMARTCARD HAL driver header file for more useful macros

  ##### Callback registration #####
  ==================================

  [..]
  The compilation define USE_HAL_SMARTCARD_REGISTER_CALLBACKS when set to 1
  allows the user to configure dynamically the driver callbacks.

  [..]
  Use Function HAL_SMARTCARD_RegisterCallback() to register a user callback.
  Function HAL_SMARTCARD_RegisterCallback() allows to register following callbacks:
  (+) TxCpltCallback            : Tx Complete Callback.
  (+) RxCpltCallback            : Rx Complete Callback.
  (+) ErrorCallback             : Error Callback.
  (+) AbortCpltCallback         : Abort Complete Callback.
  (+) AbortTransmitCpltCallback : Abort Transmit Complete Callback.
  (+) AbortReceiveCpltCallback  : Abort Receive Complete Callback.
  (+) RxFifoFullCallback        : Rx Fifo Full Callback.
  (+) TxFifoEmptyCallback       : Tx Fifo Empty Callback.
  (+) MspInitCallback           : SMARTCARD MspInit.
  (+) MspDeInitCallback         : SMARTCARD MspDeInit.
  This function takes as parameters the HAL peripheral handle, the Callback ID
  and a pointer to the user callback function.

  [..]
  Use function HAL_SMARTCARD_UnRegisterCallback() to reset a callback to the default
  weak function.
  HAL_SMARTCARD_UnRegisterCallback() takes as parameters the HAL peripheral handle,
  and the Callback ID.
  This function allows to reset following callbacks:
  (+) TxCpltCallback            : Tx Complete Callback.
  (+) RxCpltCallback            : Rx Complete Callback.
  (+) ErrorCallback             : Error Callback.
  (+) AbortCpltCallback         : Abort Complete Callback.
  (+) AbortTransmitCpltCallback : Abort Transmit Complete Callback.
  (+) AbortReceiveCpltCallback  : Abort Receive Complete Callback.
  (+) RxFifoFullCallback        : Rx Fifo Full Callback.
  (+) TxFifoEmptyCallback       : Tx Fifo Empty Callback.
  (+) MspInitCallback           : SMARTCARD MspInit.
  (+) MspDeInitCallback         : SMARTCARD MspDeInit.

  [..]
  By default, after the HAL_SMARTCARD_Init() and when the state is HAL_SMARTCARD_STATE_RESET
  all callbacks are set to the corresponding weak functions:
  examples HAL_SMARTCARD_TxCpltCallback(), HAL_SMARTCARD_RxCpltCallback().
  Exception done for MspInit and MspDeInit functions that are respectively
  reset to the legacy weak functions in the HAL_SMARTCARD_Init()
  and HAL_SMARTCARD_DeInit() only when these callbacks are null (not registered beforehand).
  If not, MspInit or MspDeInit are not null, the HAL_SMARTCARD_Init() and HAL_SMARTCARD_DeInit()
  keep and use the user MspInit/MspDeInit callbacks (registered beforehand).

  [..]
  Callbacks can be registered/unregistered in HAL_SMARTCARD_STATE_READY state only.
  Exception done MspInit/MspDeInit that can be registered/unregistered
  in HAL_SMARTCARD_STATE_READY or HAL_SMARTCARD_STATE_RESET state, thus registered (user)
  MspInit/DeInit callbacks can be used during the Init/DeInit.
  In that case first register the MspInit/MspDeInit user callbacks
  using HAL_SMARTCARD_RegisterCallback() before calling HAL_SMARTCARD_DeInit()
  or HAL_SMARTCARD_Init() function.

  [..]
  When The compilation define USE_HAL_SMARTCARD_REGISTER_CALLBACKS is set to 0 or
  not defined, the callback registration feature is not available
  and weak callbacks are used.