I2C HAL module driver. This file provides firmware functions to manage the following functionalities of the Inter Integrated Circuit (I2C) peripheral: More...
#include "stm32f7xx_hal.h"
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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:
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##### How to use this driver #####
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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 @ref 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 stream
(+++) Enable the DMAx interface clock using
(+++) Configure the DMA handle parameters
(+++) Configure the DMA Tx or Rx stream
(+++) 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 stream
(#) 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 @ref HAL_I2C_Init(), configures also the low level Hardware
(GPIO, CLOCK, NVIC...etc) by calling the customized @ref HAL_I2C_MspInit(&hi2c) API.
(#) To check if target device is ready for communication, use the function @ref HAL_I2C_IsDeviceReady()
(#) For I2C IO and IO MEM operations, three operation modes are available within this driver :
*** Polling mode IO operation ***
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(+) Transmit in master mode an amount of data in blocking mode using @ref HAL_I2C_Master_Transmit()
(+) Receive in master mode an amount of data in blocking mode using @ref HAL_I2C_Master_Receive()
(+) Transmit in slave mode an amount of data in blocking mode using @ref HAL_I2C_Slave_Transmit()
(+) Receive in slave mode an amount of data in blocking mode using @ref HAL_I2C_Slave_Receive()
*** Polling mode IO MEM operation ***
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(+) Write an amount of data in blocking mode to a specific memory address using @ref HAL_I2C_Mem_Write()
(+) Read an amount of data in blocking mode from a specific memory address using @ref HAL_I2C_Mem_Read()
*** Interrupt mode IO operation ***
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(+) Transmit in master mode an amount of data in non-blocking mode using @ref HAL_I2C_Master_Transmit_IT()
(+) At transmission end of transfer, @ref HAL_I2C_MasterTxCpltCallback() is executed and user can
add his own code by customization of function pointer @ref HAL_I2C_MasterTxCpltCallback()
(+) Receive in master mode an amount of data in non-blocking mode using @ref HAL_I2C_Master_Receive_IT()
(+) At reception end of transfer, @ref HAL_I2C_MasterRxCpltCallback() is executed and user can
add his own code by customization of function pointer @ref HAL_I2C_MasterRxCpltCallback()
(+) Transmit in slave mode an amount of data in non-blocking mode using @ref HAL_I2C_Slave_Transmit_IT()
(+) At transmission end of transfer, @ref HAL_I2C_SlaveTxCpltCallback() is executed and user can
add his own code by customization of function pointer @ref HAL_I2C_SlaveTxCpltCallback()
(+) Receive in slave mode an amount of data in non-blocking mode using @ref HAL_I2C_Slave_Receive_IT()
(+) At reception end of transfer, @ref HAL_I2C_SlaveRxCpltCallback() is executed and user can
add his own code by customization of function pointer @ref HAL_I2C_SlaveRxCpltCallback()
(+) In case of transfer Error, @ref HAL_I2C_ErrorCallback() function is executed and user can
add his own code by customization of function pointer @ref HAL_I2C_ErrorCallback()
(+) Abort a master I2C process communication with Interrupt using @ref HAL_I2C_Master_Abort_IT()
(+) End of abort process, @ref HAL_I2C_AbortCpltCallback() is executed and user can
add his own code by customization of function pointer @ref HAL_I2C_AbortCpltCallback()
(+) Discard a slave I2C process communication using @ref __HAL_I2C_GENERATE_NACK() macro.
This action will inform Master to generate a Stop condition to discard the communication.
*** Interrupt mode or DMA mode IO sequential operation ***
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(@) These interfaces allow to manage a sequential transfer with a repeated start condition
when a direction change during transfer
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(+) A specific option field manage the different steps of a sequential transfer
(+) Option field values are defined through @ref 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_FIRST_AND_NEXT_FRAME: Sequential usage (Master only), this option allow to manage a sequence with start condition, address
and data to transfer without a final stop condition, an then permit a call the same master sequential interface
several times (like @ref HAL_I2C_Master_Seq_Transmit_IT() then @ref HAL_I2C_Master_Seq_Transmit_IT()
or @ref HAL_I2C_Master_Seq_Transmit_DMA() then @ref HAL_I2C_Master_Seq_Transmit_DMA())
(++) 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
(++) I2C_LAST_FRAME_NO_STOP: Sequential usage (Master only), this option allow to manage a restart condition after several call of the same master sequential
interface several times (link with option I2C_FIRST_AND_NEXT_FRAME).
Usage can, transfer several bytes one by one using HAL_I2C_Master_Seq_Transmit_IT(option I2C_FIRST_AND_NEXT_FRAME then I2C_NEXT_FRAME)
or HAL_I2C_Master_Seq_Receive_IT(option I2C_FIRST_AND_NEXT_FRAME then I2C_NEXT_FRAME)
or HAL_I2C_Master_Seq_Transmit_DMA(option I2C_FIRST_AND_NEXT_FRAME then I2C_NEXT_FRAME)
or HAL_I2C_Master_Seq_Receive_DMA(option I2C_FIRST_AND_NEXT_FRAME then I2C_NEXT_FRAME).
Then usage of this option I2C_LAST_FRAME_NO_STOP at the last Transmit or Receive sequence permit to call the oposite interface Receive or Transmit
without stopping the communication and so generate a restart condition.
(++) I2C_OTHER_FRAME: Sequential usage (Master only), this option allow to manage a restart condition after each call of the same master sequential
interface.
Usage can, transfer several bytes one by one with a restart with slave address between each bytes using HAL_I2C_Master_Seq_Transmit_IT(option I2C_FIRST_FRAME then I2C_OTHER_FRAME)
or HAL_I2C_Master_Seq_Receive_IT(option I2C_FIRST_FRAME then I2C_OTHER_FRAME)
or HAL_I2C_Master_Seq_Transmit_DMA(option I2C_FIRST_FRAME then I2C_OTHER_FRAME)
or HAL_I2C_Master_Seq_Receive_DMA(option I2C_FIRST_FRAME then I2C_OTHER_FRAME).
Then usage of this option I2C_OTHER_AND_LAST_FRAME at the last frame to help automatic generation of STOP condition.
(+) Differents sequential I2C interfaces are listed below:
(++) Sequential transmit in master I2C mode an amount of data in non-blocking mode using @ref HAL_I2C_Master_Seq_Transmit_IT()
or using @ref HAL_I2C_Master_Seq_Transmit_DMA()
(+++) At transmission end of current frame transfer, @ref HAL_I2C_MasterTxCpltCallback() is executed and user can
add his own code by customization of function pointer @ref HAL_I2C_MasterTxCpltCallback()
(++) Sequential receive in master I2C mode an amount of data in non-blocking mode using @ref HAL_I2C_Master_Seq_Receive_IT()
or using @ref HAL_I2C_Master_Seq_Receive_DMA()
(+++) At reception end of current frame transfer, @ref HAL_I2C_MasterRxCpltCallback() is executed and user can
add his own code by customization of function pointer @ref HAL_I2C_MasterRxCpltCallback()
(++) Abort a master IT or DMA I2C process communication with Interrupt using @ref HAL_I2C_Master_Abort_IT()
(+++) End of abort process, @ref HAL_I2C_AbortCpltCallback() is executed and user can
add his own code by customization of function pointer @ref HAL_I2C_AbortCpltCallback()
(++) Enable/disable the Address listen mode in slave I2C mode using @ref HAL_I2C_EnableListen_IT() @ref HAL_I2C_DisableListen_IT()
(+++) When address slave I2C match, @ref 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 @ref HAL_I2C_ListenCpltCallback() is executed and user can
add his own code by customization of function pointer @ref HAL_I2C_ListenCpltCallback()
(++) Sequential transmit in slave I2C mode an amount of data in non-blocking mode using @ref HAL_I2C_Slave_Seq_Transmit_IT()
or using @ref HAL_I2C_Slave_Seq_Transmit_DMA()
(+++) At transmission end of current frame transfer, @ref HAL_I2C_SlaveTxCpltCallback() is executed and user can
add his own code by customization of function pointer @ref HAL_I2C_SlaveTxCpltCallback()
(++) Sequential receive in slave I2C mode an amount of data in non-blocking mode using @ref HAL_I2C_Slave_Seq_Receive_IT()
or using @ref HAL_I2C_Slave_Seq_Receive_DMA()
(+++) At reception end of current frame transfer, @ref HAL_I2C_SlaveRxCpltCallback() is executed and user can
add his own code by customization of function pointer @ref HAL_I2C_SlaveRxCpltCallback()
(++) In case of transfer Error, @ref HAL_I2C_ErrorCallback() function is executed and user can
add his own code by customization of function pointer @ref HAL_I2C_ErrorCallback()
(++) Discard a slave I2C process communication using @ref __HAL_I2C_GENERATE_NACK() macro.
This action will inform Master to generate a Stop condition to discard the communication.
*** Interrupt mode IO MEM operation ***
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(+) Write an amount of data in non-blocking mode with Interrupt to a specific memory address using
@ref HAL_I2C_Mem_Write_IT()
(+) At Memory end of write transfer, @ref HAL_I2C_MemTxCpltCallback() is executed and user can
add his own code by customization of function pointer @ref HAL_I2C_MemTxCpltCallback()
(+) Read an amount of data in non-blocking mode with Interrupt from a specific memory address using
@ref HAL_I2C_Mem_Read_IT()
(+) At Memory end of read transfer, @ref HAL_I2C_MemRxCpltCallback() is executed and user can
add his own code by customization of function pointer @ref HAL_I2C_MemRxCpltCallback()
(+) In case of transfer Error, @ref HAL_I2C_ErrorCallback() function is executed and user can
add his own code by customization of function pointer @ref HAL_I2C_ErrorCallback()
*** DMA mode IO operation ***
==============================
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(+) Transmit in master mode an amount of data in non-blocking mode (DMA) using
@ref HAL_I2C_Master_Transmit_DMA()
(+) At transmission end of transfer, @ref HAL_I2C_MasterTxCpltCallback() is executed and user can
add his own code by customization of function pointer @ref HAL_I2C_MasterTxCpltCallback()
(+) Receive in master mode an amount of data in non-blocking mode (DMA) using
@ref HAL_I2C_Master_Receive_DMA()
(+) At reception end of transfer, @ref HAL_I2C_MasterRxCpltCallback() is executed and user can
add his own code by customization of function pointer @ref HAL_I2C_MasterRxCpltCallback()
(+) Transmit in slave mode an amount of data in non-blocking mode (DMA) using
@ref HAL_I2C_Slave_Transmit_DMA()
(+) At transmission end of transfer, @ref HAL_I2C_SlaveTxCpltCallback() is executed and user can
add his own code by customization of function pointer @ref HAL_I2C_SlaveTxCpltCallback()
(+) Receive in slave mode an amount of data in non-blocking mode (DMA) using
@ref HAL_I2C_Slave_Receive_DMA()
(+) At reception end of transfer, @ref HAL_I2C_SlaveRxCpltCallback() is executed and user can
add his own code by customization of function pointer @ref HAL_I2C_SlaveRxCpltCallback()
(+) In case of transfer Error, @ref HAL_I2C_ErrorCallback() function is executed and user can
add his own code by customization of function pointer @ref HAL_I2C_ErrorCallback()
(+) Abort a master I2C process communication with Interrupt using @ref HAL_I2C_Master_Abort_IT()
(+) End of abort process, @ref HAL_I2C_AbortCpltCallback() is executed and user can
add his own code by customization of function pointer @ref HAL_I2C_AbortCpltCallback()
(+) Discard a slave I2C process communication using @ref __HAL_I2C_GENERATE_NACK() macro.
This action will inform Master to generate a Stop condition to discard the communication.
*** DMA mode IO MEM operation ***
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(+) Write an amount of data in non-blocking mode with DMA to a specific memory address using
@ref HAL_I2C_Mem_Write_DMA()
(+) At Memory end of write transfer, @ref HAL_I2C_MemTxCpltCallback() is executed and user can
add his own code by customization of function pointer @ref HAL_I2C_MemTxCpltCallback()
(+) Read an amount of data in non-blocking mode with DMA from a specific memory address using
@ref HAL_I2C_Mem_Read_DMA()
(+) At Memory end of read transfer, @ref HAL_I2C_MemRxCpltCallback() is executed and user can
add his own code by customization of function pointer @ref HAL_I2C_MemRxCpltCallback()
(+) In case of transfer Error, @ref HAL_I2C_ErrorCallback() function is executed and user can
add his own code by customization of function pointer @ref HAL_I2C_ErrorCallback()
*** I2C HAL driver macros list ***
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Below the list of most used macros in I2C HAL driver.
(+) @ref __HAL_I2C_ENABLE: Enable the I2C peripheral
(+) @ref __HAL_I2C_DISABLE: Disable the I2C peripheral
(+) @ref __HAL_I2C_GENERATE_NACK: Generate a Non-Acknowledge I2C peripheral in Slave mode
(+) @ref __HAL_I2C_GET_FLAG: Check whether the specified I2C flag is set or not
(+) @ref __HAL_I2C_CLEAR_FLAG: Clear the specified I2C pending flag
(+) @ref __HAL_I2C_ENABLE_IT: Enable the specified I2C interrupt
(+) @ref __HAL_I2C_DISABLE_IT: Disable the specified I2C interrupt
*** Callback registration ***
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The compilation flag USE_HAL_I2C_REGISTER_CALLBACKS when set to 1
allows the user to configure dynamically the driver callbacks.
Use Functions @ref HAL_I2C_RegisterCallback() or @ref HAL_I2C_RegisterAddrCallback()
to register an interrupt callback.
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Function @ref HAL_I2C_RegisterCallback() allows to register following callbacks:
(+) MasterTxCpltCallback : callback for Master transmission end of transfer.
(+) MasterRxCpltCallback : callback for Master reception end of transfer.
(+) SlaveTxCpltCallback : callback for Slave transmission end of transfer.
(+) SlaveRxCpltCallback : callback for Slave reception end of transfer.
(+) ListenCpltCallback : callback for end of listen mode.
(+) MemTxCpltCallback : callback for Memory transmission end of transfer.
(+) MemRxCpltCallback : callback for Memory reception end of transfer.
(+) ErrorCallback : callback for error detection.
(+) AbortCpltCallback : callback for abort completion process.
(+) MspInitCallback : callback for Msp Init.
(+) MspDeInitCallback : callback for Msp DeInit.
This function takes as parameters the HAL peripheral handle, the Callback ID
and a pointer to the user callback function.
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For specific callback AddrCallback use dedicated register callbacks : @ref HAL_I2C_RegisterAddrCallback().
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Use function @ref HAL_I2C_UnRegisterCallback to reset a callback to the default
weak function.
@ref HAL_I2C_UnRegisterCallback takes as parameters the HAL peripheral handle,
and the Callback ID.
This function allows to reset following callbacks:
(+) MasterTxCpltCallback : callback for Master transmission end of transfer.
(+) MasterRxCpltCallback : callback for Master reception end of transfer.
(+) SlaveTxCpltCallback : callback for Slave transmission end of transfer.
(+) SlaveRxCpltCallback : callback for Slave reception end of transfer.
(+) ListenCpltCallback : callback for end of listen mode.
(+) MemTxCpltCallback : callback for Memory transmission end of transfer.
(+) MemRxCpltCallback : callback for Memory reception end of transfer.
(+) ErrorCallback : callback for error detection.
(+) AbortCpltCallback : callback for abort completion process.
(+) MspInitCallback : callback for Msp Init.
(+) MspDeInitCallback : callback for Msp DeInit.
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For callback AddrCallback use dedicated register callbacks : @ref HAL_I2C_UnRegisterAddrCallback().
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By default, after the @ref HAL_I2C_Init() and when the state is @ref HAL_I2C_STATE_RESET
all callbacks are set to the corresponding weak functions:
examples @ref HAL_I2C_MasterTxCpltCallback(), @ref HAL_I2C_MasterRxCpltCallback().
Exception done for MspInit and MspDeInit functions that are
reset to the legacy weak functions in the @ref HAL_I2C_Init()/ @ref HAL_I2C_DeInit() only when
these callbacks are null (not registered beforehand).
If MspInit or MspDeInit are not null, the @ref HAL_I2C_Init()/ @ref HAL_I2C_DeInit()
keep and use the user MspInit/MspDeInit callbacks (registered beforehand) whatever the state.
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Callbacks can be registered/unregistered in @ref HAL_I2C_STATE_READY state only.
Exception done MspInit/MspDeInit functions that can be registered/unregistered
in @ref HAL_I2C_STATE_READY or @ref HAL_I2C_STATE_RESET state,
thus registered (user) MspInit/DeInit callbacks can be used during the Init/DeInit.
Then, the user first registers the MspInit/MspDeInit user callbacks
using @ref HAL_I2C_RegisterCallback() before calling @ref HAL_I2C_DeInit()
or @ref HAL_I2C_Init() function.
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When the compilation flag USE_HAL_I2C_REGISTER_CALLBACKS is set to 0 or
not defined, the callback registration feature is not available and all callbacks
are set to the corresponding weak functions.
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(@) You can refer to the I2C HAL driver header file for more useful macros- Attention
© Copyright (c) 2017 STMicroelectronics. All rights reserved.
This software component is licensed by ST under BSD 3-Clause license, the "License"; You may not use this file except in compliance with the License. You may obtain a copy of the License at: opensource.org/licenses/BSD-3-Clause
Definition in file stm32f7xx_hal_i2c.c.