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:

V1.1.0

Date:

16-September-2015

  ==============================================================================
                        ##### 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()

    *** 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 MEM 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 MEM 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()

    *** 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 MEM 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 MEM 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_GET_FLAG : Checks 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.