stm32l4xx_hal_i2c.c File Reference

I2C HAL module driver. This file provides firmware functions to manage the following functionalities of the Inter Integrated Circuit (I2C) peripheral: + Initialization and de-initialization functions + IO operation functions + Peripheral State and Errors functions. More...

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Detailed Description

I2C HAL module driver. This file provides firmware functions to manage the following functionalities of the Inter Integrated Circuit (I2C) peripheral: + Initialization and de-initialization functions + IO operation functions + Peripheral State and Errors functions.

Author:

MCD Application Team

Version:

V1.5.1

Date:

31-May-2016

  ==============================================================================
                        ##### How to use this driver #####
  ==============================================================================
    [..]
    The I2C HAL driver can be used as follows:

    (#) Declare a I2C_HandleTypeDef handle structure, for example:
        I2C_HandleTypeDef  hi2c;

    (#)Initialize the I2C low level resources by implementing the HAL_I2C_MspInit() API:
        (##) Enable the I2Cx interface clock
        (##) I2C pins configuration
            (+++) Enable the clock for the I2C GPIOs
            (+++) Configure I2C pins as alternate function open-drain
        (##) NVIC configuration if you need to use interrupt process
            (+++) Configure the I2Cx interrupt priority
            (+++) Enable the NVIC I2C IRQ Channel
        (##) DMA Configuration if you need to use DMA process
            (+++) Declare a DMA_HandleTypeDef handle structure for the transmit or receive channel
            (+++) Enable the DMAx interface clock using
            (+++) Configure the DMA handle parameters
            (+++) Configure the DMA Tx or Rx channel
            (+++) Associate the initialized DMA handle to the hi2c DMA Tx or Rx handle
            (+++) Configure the priority and enable the NVIC for the transfer complete interrupt on
                  the DMA Tx or Rx channel

    (#) Configure the Communication Clock Timing, Own Address1, Master Addressing mode, Dual Addressing mode,
        Own Address2, Own Address2 Mask, General call and Nostretch mode in the hi2c Init structure.

    (#) Initialize the I2C registers by calling the HAL_I2C_Init(), configures also the low level Hardware
        (GPIO, CLOCK, NVIC...etc) by calling the customized HAL_I2C_MspInit(&hi2c) API.

    (#) To check if target device is ready for communication, use the function HAL_I2C_IsDeviceReady()

    (#) For I2C IO and IO MEM operations, three operation modes are available within this driver :

    *** Polling mode IO operation ***
    =================================
    [..]
      (+) Transmit in master mode an amount of data in blocking mode using HAL_I2C_Master_Transmit()
      (+) Receive in master mode an amount of data in blocking mode using HAL_I2C_Master_Receive()
      (+) Transmit in slave mode an amount of data in blocking mode using HAL_I2C_Slave_Transmit()
      (+) Receive in slave mode an amount of data in blocking mode using HAL_I2C_Slave_Receive()

    *** Polling mode IO MEM operation ***
    =====================================
    [..]
      (+) Write an amount of data in blocking mode to a specific memory address using HAL_I2C_Mem_Write()
      (+) Read an amount of data in blocking mode from a specific memory address using HAL_I2C_Mem_Read()


    *** Interrupt mode IO operation ***
    ===================================
    [..]
      (+) Transmit in master mode an amount of data in non-blocking mode using HAL_I2C_Master_Transmit_IT()
      (+) At transmission end of transfer, HAL_I2C_MasterTxCpltCallback() is executed and user can
           add his own code by customization of function pointer HAL_I2C_MasterTxCpltCallback()
      (+) Receive in master mode an amount of data in non-blocking mode using HAL_I2C_Master_Receive_IT()
      (+) At reception end of transfer, HAL_I2C_MasterRxCpltCallback() is executed and user can
           add his own code by customization of function pointer HAL_I2C_MasterRxCpltCallback()
      (+) Transmit in slave mode an amount of data in non-blocking mode using HAL_I2C_Slave_Transmit_IT()
      (+) At transmission end of transfer, HAL_I2C_SlaveTxCpltCallback() is executed and user can
           add his own code by customization of function pointer HAL_I2C_SlaveTxCpltCallback()
      (+) Receive in slave mode an amount of data in non-blocking mode using HAL_I2C_Slave_Receive_IT()
      (+) At reception end of transfer, HAL_I2C_SlaveRxCpltCallback() is executed and user can
           add his own code by customization of function pointer HAL_I2C_SlaveRxCpltCallback()
      (+) In case of transfer Error, HAL_I2C_ErrorCallback() function is executed and user can
           add his own code by customization of function pointer HAL_I2C_ErrorCallback()
      (+) Abort a master I2C process communication with Interrupt using HAL_I2C_Master_Abort_IT()
      (+) End of abort process, HAL_I2C_AbortCpltCallback() is executed and user can
           add his own code by customization of function pointer HAL_I2C_AbortCpltCallback()
      (+) Discard a slave I2C process communication using __HAL_I2C_GENERATE_NACK() macro.
           This action will inform Master to generate a Stop condition to discard the communication.


    *** Interrupt mode IO sequential operation ***
    ===================================
    [..]
      (@) These interfaces allow to manage a sequential transfer with a repeated start condition
          when a direction change during transfer
    [..]
      (+) A specific option field manage the different steps of a sequential transfer
      (+) Option field values are defined through I2C_XFEROPTIONS and are listed below:
      (++) I2C_FIRST_AND_LAST_FRAME: No sequential usage, functionnal is same as associated interfaces in no sequential mode
      (++) I2C_FIRST_FRAME: Sequential usage, this option allow to manage a sequence with start condition, address
                            and data to transfer without a final stop condition
      (++) I2C_NEXT_FRAME: Sequential usage, this option allow to manage a sequence with a restart condition, address
                            and with new data to transfer if the direction change or manage only the new data to transfer
                            if no direction change and without a final stop condition in both cases
      (++) I2C_LAST_FRAME: Sequential usage, this option allow to manage a sequance with a restart condition, address
                            and with new data to transfer if the direction change or manage only the new data to transfer
                            if no direction change and with a final stop condition in both cases

      (+) Differents sequential I2C interfaces are listed below:
      (++) Sequential transmit in master I2C mode an amount of data in non-blocking mode using HAL_I2C_Master_Sequential_Transmit_IT()
      (+++) At transmission end of current frame transfer, HAL_I2C_MasterTxCpltCallback() is executed and user can
           add his own code by customization of function pointer HAL_I2C_MasterTxCpltCallback()
      (++) Sequential receive in master I2C mode an amount of data in non-blocking mode using HAL_I2C_Master_Sequential_Receive_IT()
      (+++) At reception end of current frame transfer, HAL_I2C_MasterRxCpltCallback() is executed and user can
           add his own code by customization of function pointer HAL_I2C_MasterRxCpltCallback()
      (++) Abort a master I2C process communication with Interrupt using HAL_I2C_Master_Abort_IT()
      (+++) End of abort process, HAL_I2C_AbortCpltCallback() is executed and user can
           add his own code by customization of function pointer HAL_I2C_AbortCpltCallback()
      (+++) mean HAL_I2C_MasterTxCpltCallback() in case of previous state was master transmit
      (+++) mean HAL_I2c_MasterRxCpltCallback() in case of previous state was master receive
      (++) Enable/disable the Address listen mode in slave I2C mode using HAL_I2C_EnableListen_IT() HAL_I2C_DisableListen_IT()
      (+++) When address slave I2C match, HAL_I2C_AddrCallback() is executed and user can
           add his own code to check the Address Match Code and the transmission direction request by master (Write/Read).
      (+++) At Listen mode end HAL_I2C_ListenCpltCallback() is executed and user can
           add his own code by customization of function pointer HAL_I2C_ListenCpltCallback()
      (++) Sequential transmit in slave I2C mode an amount of data in non-blocking mode using HAL_I2C_Slave_Sequential_Transmit_IT()
      (+++) At transmission end of current frame transfer, HAL_I2C_SlaveTxCpltCallback() is executed and user can
           add his own code by customization of function pointer HAL_I2C_SlaveTxCpltCallback()
      (++) Sequential receive in slave I2C mode an amount of data in non-blocking mode using HAL_I2C_Slave_Sequential_Receive_IT()
      (+++) At reception end of current frame transfer, HAL_I2C_SlaveRxCpltCallback() is executed and user can
           add his own code by customization of function pointer HAL_I2C_SlaveRxCpltCallback()
      (++) In case of transfer Error, HAL_I2C_ErrorCallback() function is executed and user can
           add his own code by customization of function pointer HAL_I2C_ErrorCallback()
      (++) Abort a master I2C process communication with Interrupt using HAL_I2C_Master_Abort_IT()
      (++) End of abort process, HAL_I2C_AbortCpltCallback() is executed and user can
           add his own code by customization of function pointer HAL_I2C_AbortCpltCallback()
      (++) Discard a slave I2C process communication using __HAL_I2C_GENERATE_NACK() macro.
           This action will inform Master to generate a Stop condition to discard the communication.

    *** Interrupt mode IO MEM operation ***
    =======================================
    [..]
      (+) Write an amount of data in non-blocking mode with Interrupt to a specific memory address using
          HAL_I2C_Mem_Write_IT()
      (+) At Memory end of write transfer, HAL_I2C_MemTxCpltCallback() is executed and user can
           add his own code by customization of function pointer HAL_I2C_MemTxCpltCallback()
      (+) Read an amount of data in non-blocking mode with Interrupt from a specific memory address using
          HAL_I2C_Mem_Read_IT()
      (+) At Memory end of read transfer, HAL_I2C_MemRxCpltCallback() is executed and user can
           add his own code by customization of function pointer HAL_I2C_MemRxCpltCallback()
      (+) In case of transfer Error, HAL_I2C_ErrorCallback() function is executed and user can
           add his own code by customization of function pointer HAL_I2C_ErrorCallback()

    *** DMA mode IO operation ***
    ==============================
    [..]
      (+) Transmit in master mode an amount of data in non-blocking mode (DMA) using
          HAL_I2C_Master_Transmit_DMA()
      (+) At transmission end of transfer, HAL_I2C_MasterTxCpltCallback() is executed and user can
           add his own code by customization of function pointer HAL_I2C_MasterTxCpltCallback()
      (+) Receive in master mode an amount of data in non-blocking mode (DMA) using
          HAL_I2C_Master_Receive_DMA()
      (+) At reception end of transfer, HAL_I2C_MasterRxCpltCallback() is executed and user can
           add his own code by customization of function pointer HAL_I2C_MasterRxCpltCallback()
      (+) Transmit in slave mode an amount of data in non-blocking mode (DMA) using
          HAL_I2C_Slave_Transmit_DMA()
      (+) At transmission end of transfer, HAL_I2C_SlaveTxCpltCallback() is executed and user can
           add his own code by customization of function pointer HAL_I2C_SlaveTxCpltCallback()
      (+) Receive in slave mode an amount of data in non-blocking mode (DMA) using
          HAL_I2C_Slave_Receive_DMA()
      (+) At reception end of transfer, HAL_I2C_SlaveRxCpltCallback() is executed and user can
           add his own code by customization of function pointer HAL_I2C_SlaveRxCpltCallback()
      (+) In case of transfer Error, HAL_I2C_ErrorCallback() function is executed and user can
           add his own code by customization of function pointer HAL_I2C_ErrorCallback()
      (+) Abort a master I2C process communication with Interrupt using HAL_I2C_Master_Abort_IT()
      (+) End of abort process, HAL_I2C_AbortCpltCallback() is executed and user can
           add his own code by customization of function pointer HAL_I2C_AbortCpltCallback()
      (+) Discard a slave I2C process communication using __HAL_I2C_GENERATE_NACK() macro.
           This action will inform Master to generate a Stop condition to discard the communication.

    *** DMA mode IO MEM operation ***
    =================================
    [..]
      (+) Write an amount of data in non-blocking mode with DMA to a specific memory address using
          HAL_I2C_Mem_Write_DMA()
      (+) At Memory end of write transfer, HAL_I2C_MemTxCpltCallback() is executed and user can
           add his own code by customization of function pointer HAL_I2C_MemTxCpltCallback()
      (+) Read an amount of data in non-blocking mode with DMA from a specific memory address using
          HAL_I2C_Mem_Read_DMA()
      (+) At Memory end of read transfer, HAL_I2C_MemRxCpltCallback() is executed and user can
           add his own code by customization of function pointer HAL_I2C_MemRxCpltCallback()
      (+) In case of transfer Error, HAL_I2C_ErrorCallback() function is executed and user can
           add his own code by customization of function pointer HAL_I2C_ErrorCallback()


     *** I2C HAL driver macros list ***
     ==================================
     [..]
       Below the list of most used macros in I2C HAL driver.

      (+) __HAL_I2C_ENABLE: Enable the I2C peripheral
      (+) __HAL_I2C_DISABLE: Disable the I2C peripheral
      (+) __HAL_I2C_GENERATE_NACK: Generate a Non-Acknowledge I2C peripheral in Slave mode
      (+) __HAL_I2C_GET_FLAG: Check whether the specified I2C flag is set or not
      (+) __HAL_I2C_CLEAR_FLAG: Clear the specified I2C pending flag
      (+) __HAL_I2C_ENABLE_IT: Enable the specified I2C interrupt
      (+) __HAL_I2C_DISABLE_IT: Disable the specified I2C interrupt

     [..]
       (@) You can refer to the I2C HAL driver header file for more useful macros

  

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Definition in file stm32l4xx_hal_i2c.c.