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stm32f0xx_hal_i2c.c
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/**
******************************************************************************
* @file stm32f0xx_hal_i2c.c
* @author MCD Application Team
* @brief 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
*
@verbatim
==============================================================================
##### 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 @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 HAL_I2C_Master_Sequential_Transmit_IT() then HAL_I2C_Master_Sequential_Transmit_IT())
(++) 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()
(++) 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
@endverbatim
******************************************************************************
* @attention
*
* <h2><center>© COPYRIGHT(c) 2016 STMicroelectronics</center></h2>
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. Neither the name of STMicroelectronics nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "stm32f0xx_hal.h"
/** @addtogroup STM32F0xx_HAL_Driver
* @{
*/
/** @defgroup I2C I2C
* @brief I2C HAL module driver
* @{
*/
#ifdef HAL_I2C_MODULE_ENABLED
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/** @defgroup I2C_Private_Define I2C Private Define
* @{
*/
#define TIMING_CLEAR_MASK (0xF0FFFFFFU) /*!< I2C TIMING clear register Mask */
#define I2C_TIMEOUT_ADDR (10000U) /*!< 10 s */
#define I2C_TIMEOUT_BUSY (25U) /*!< 25 ms */
#define I2C_TIMEOUT_DIR (25U) /*!< 25 ms */
#define I2C_TIMEOUT_RXNE (25U) /*!< 25 ms */
#define I2C_TIMEOUT_STOPF (25U) /*!< 25 ms */
#define I2C_TIMEOUT_TC (25U) /*!< 25 ms */
#define I2C_TIMEOUT_TCR (25U) /*!< 25 ms */
#define I2C_TIMEOUT_TXIS (25U) /*!< 25 ms */
#define I2C_TIMEOUT_FLAG (25U) /*!< 25 ms */
#define MAX_NBYTE_SIZE 255U
#define SlaveAddr_SHIFT 7U
#define SlaveAddr_MSK 0x06U
/* Private define for @ref PreviousState usage */
#define I2C_STATE_MSK ((uint32_t)((HAL_I2C_STATE_BUSY_TX | HAL_I2C_STATE_BUSY_RX) & (~((uint32_t)HAL_I2C_STATE_READY)))) /*!< Mask State define, keep only RX and TX bits */
#define I2C_STATE_NONE ((uint32_t)(HAL_I2C_MODE_NONE)) /*!< Default Value */
#define I2C_STATE_MASTER_BUSY_TX ((uint32_t)((HAL_I2C_STATE_BUSY_TX & I2C_STATE_MSK) | HAL_I2C_MODE_MASTER)) /*!< Master Busy TX, combinaison of State LSB and Mode enum */
#define I2C_STATE_MASTER_BUSY_RX ((uint32_t)((HAL_I2C_STATE_BUSY_RX & I2C_STATE_MSK) | HAL_I2C_MODE_MASTER)) /*!< Master Busy RX, combinaison of State LSB and Mode enum */
#define I2C_STATE_SLAVE_BUSY_TX ((uint32_t)((HAL_I2C_STATE_BUSY_TX & I2C_STATE_MSK) | HAL_I2C_MODE_SLAVE)) /*!< Slave Busy TX, combinaison of State LSB and Mode enum */
#define I2C_STATE_SLAVE_BUSY_RX ((uint32_t)((HAL_I2C_STATE_BUSY_RX & I2C_STATE_MSK) | HAL_I2C_MODE_SLAVE)) /*!< Slave Busy RX, combinaison of State LSB and Mode enum */
#define I2C_STATE_MEM_BUSY_TX ((uint32_t)((HAL_I2C_STATE_BUSY_TX & I2C_STATE_MSK) | HAL_I2C_MODE_MEM)) /*!< Memory Busy TX, combinaison of State LSB and Mode enum */
#define I2C_STATE_MEM_BUSY_RX ((uint32_t)((HAL_I2C_STATE_BUSY_RX & I2C_STATE_MSK) | HAL_I2C_MODE_MEM)) /*!< Memory Busy RX, combinaison of State LSB and Mode enum */
/* Private define to centralize the enable/disable of Interrupts */
#define I2C_XFER_TX_IT (0x00000001U)
#define I2C_XFER_RX_IT (0x00000002U)
#define I2C_XFER_LISTEN_IT (0x00000004U)
#define I2C_XFER_ERROR_IT (0x00000011U)
#define I2C_XFER_CPLT_IT (0x00000012U)
#define I2C_XFER_RELOAD_IT (0x00000012U)
/* Private define Sequential Transfer Options default/reset value */
#define I2C_NO_OPTION_FRAME (0xFFFF0000U)
/**
* @}
*/
/* Private macro -------------------------------------------------------------*/
#define I2C_GET_DMA_REMAIN_DATA(__HANDLE__) ((((__HANDLE__)->State) == HAL_I2C_STATE_BUSY_TX) ? \
((uint32_t)((__HANDLE__)->hdmatx->Instance->CNDTR)) : \
((uint32_t)((__HANDLE__)->hdmarx->Instance->CNDTR)))
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/** @defgroup I2C_Private_Functions I2C Private Functions
* @{
*/
/* Private functions to handle DMA transfer */
static void I2C_DMAMasterTransmitCplt(DMA_HandleTypeDef *hdma);
static void I2C_DMAMasterReceiveCplt(DMA_HandleTypeDef *hdma);
static void I2C_DMASlaveTransmitCplt(DMA_HandleTypeDef *hdma);
static void I2C_DMASlaveReceiveCplt(DMA_HandleTypeDef *hdma);
static void I2C_DMAError(DMA_HandleTypeDef *hdma);
static void I2C_DMAAbort(DMA_HandleTypeDef *hdma);
/* Private functions to handle IT transfer */
static void I2C_ITAddrCplt(I2C_HandleTypeDef *hi2c, uint32_t ITFlags);
static void I2C_ITMasterSequentialCplt(I2C_HandleTypeDef *hi2c);
static void I2C_ITSlaveSequentialCplt(I2C_HandleTypeDef *hi2c);
static void I2C_ITMasterCplt(I2C_HandleTypeDef *hi2c, uint32_t ITFlags);
static void I2C_ITSlaveCplt(I2C_HandleTypeDef *hi2c, uint32_t ITFlags);
static void I2C_ITListenCplt(I2C_HandleTypeDef *hi2c, uint32_t ITFlags);
static void I2C_ITError(I2C_HandleTypeDef *hi2c, uint32_t ErrorCode);
/* Private functions to handle IT transfer */
static HAL_StatusTypeDef I2C_RequestMemoryWrite(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint16_t MemAddress, uint16_t MemAddSize, uint32_t Timeout, uint32_t Tickstart);
static HAL_StatusTypeDef I2C_RequestMemoryRead(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint16_t MemAddress, uint16_t MemAddSize, uint32_t Timeout, uint32_t Tickstart);
/* Private functions for I2C transfer IRQ handler */
static HAL_StatusTypeDef I2C_Master_ISR_IT(struct __I2C_HandleTypeDef *hi2c, uint32_t ITFlags, uint32_t ITSources);
static HAL_StatusTypeDef I2C_Slave_ISR_IT(struct __I2C_HandleTypeDef *hi2c, uint32_t ITFlags, uint32_t ITSources);
static HAL_StatusTypeDef I2C_Master_ISR_DMA(struct __I2C_HandleTypeDef *hi2c, uint32_t ITFlags, uint32_t ITSources);
static HAL_StatusTypeDef I2C_Slave_ISR_DMA(struct __I2C_HandleTypeDef *hi2c, uint32_t ITFlags, uint32_t ITSources);
/* Private functions to handle flags during polling transfer */
static HAL_StatusTypeDef I2C_WaitOnFlagUntilTimeout(I2C_HandleTypeDef *hi2c, uint32_t Flag, FlagStatus Status, uint32_t Timeout, uint32_t Tickstart);
static HAL_StatusTypeDef I2C_WaitOnTXISFlagUntilTimeout(I2C_HandleTypeDef *hi2c, uint32_t Timeout, uint32_t Tickstart);
static HAL_StatusTypeDef I2C_WaitOnRXNEFlagUntilTimeout(I2C_HandleTypeDef *hi2c, uint32_t Timeout, uint32_t Tickstart);
static HAL_StatusTypeDef I2C_WaitOnSTOPFlagUntilTimeout(I2C_HandleTypeDef *hi2c, uint32_t Timeout, uint32_t Tickstart);
static HAL_StatusTypeDef I2C_IsAcknowledgeFailed(I2C_HandleTypeDef *hi2c, uint32_t Timeout, uint32_t Tickstart);
/* Private functions to centralize the enable/disable of Interrupts */
static HAL_StatusTypeDef I2C_Enable_IRQ(I2C_HandleTypeDef *hi2c, uint16_t InterruptRequest);
static HAL_StatusTypeDef I2C_Disable_IRQ(I2C_HandleTypeDef *hi2c, uint16_t InterruptRequest);
/* Private functions to flush TXDR register */
static void I2C_Flush_TXDR(I2C_HandleTypeDef *hi2c);
/* Private functions to handle start, restart or stop a transfer */
static void I2C_TransferConfig(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint8_t Size, uint32_t Mode, uint32_t Request);
/**
* @}
*/
/* Exported functions --------------------------------------------------------*/
/** @defgroup I2C_Exported_Functions I2C Exported Functions
* @{
*/
/** @defgroup I2C_Exported_Functions_Group1 Initialization and de-initialization functions
* @brief Initialization and Configuration functions
*
@verbatim
===============================================================================
##### Initialization and de-initialization functions #####
===============================================================================
[..] This subsection provides a set of functions allowing to initialize and
deinitialize the I2Cx peripheral:
(+) User must Implement HAL_I2C_MspInit() function in which he configures
all related peripherals resources (CLOCK, GPIO, DMA, IT and NVIC ).
(+) Call the function HAL_I2C_Init() to configure the selected device with
the selected configuration:
(++) Clock Timing
(++) Own Address 1
(++) Addressing mode (Master, Slave)
(++) Dual Addressing mode
(++) Own Address 2
(++) Own Address 2 Mask
(++) General call mode
(++) Nostretch mode
(+) Call the function HAL_I2C_DeInit() to restore the default configuration
of the selected I2Cx peripheral.
@endverbatim
* @{
*/
/**
* @brief Initializes the I2C according to the specified parameters
* in the I2C_InitTypeDef and initialize the associated handle.
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
* the configuration information for the specified I2C.
* @retval HAL status
*/
HAL_StatusTypeDef HAL_I2C_Init(I2C_HandleTypeDef *hi2c)
{
/* Check the I2C handle allocation */
if (hi2c == NULL)
{
return HAL_ERROR;
}
/* Check the parameters */
assert_param(IS_I2C_ALL_INSTANCE(hi2c->Instance));
assert_param(IS_I2C_OWN_ADDRESS1(hi2c->Init.OwnAddress1));
assert_param(IS_I2C_ADDRESSING_MODE(hi2c->Init.AddressingMode));
assert_param(IS_I2C_DUAL_ADDRESS(hi2c->Init.DualAddressMode));
assert_param(IS_I2C_OWN_ADDRESS2(hi2c->Init.OwnAddress2));
assert_param(IS_I2C_OWN_ADDRESS2_MASK(hi2c->Init.OwnAddress2Masks));
assert_param(IS_I2C_GENERAL_CALL(hi2c->Init.GeneralCallMode));
assert_param(IS_I2C_NO_STRETCH(hi2c->Init.NoStretchMode));
if (hi2c->State == HAL_I2C_STATE_RESET)
{
/* Allocate lock resource and initialize it */
hi2c->Lock = HAL_UNLOCKED;
/* Init the low level hardware : GPIO, CLOCK, CORTEX...etc */
HAL_I2C_MspInit(hi2c);
}
hi2c->State = HAL_I2C_STATE_BUSY;
/* Disable the selected I2C peripheral */
__HAL_I2C_DISABLE(hi2c);
/*---------------------------- I2Cx TIMINGR Configuration ------------------*/
/* Configure I2Cx: Frequency range */
hi2c->Instance->TIMINGR = hi2c->Init.Timing & TIMING_CLEAR_MASK;
/*---------------------------- I2Cx OAR1 Configuration ---------------------*/
/* Disable Own Address1 before set the Own Address1 configuration */
hi2c->Instance->OAR1 &= ~I2C_OAR1_OA1EN;
/* Configure I2Cx: Own Address1 and ack own address1 mode */
if (hi2c->Init.AddressingMode == I2C_ADDRESSINGMODE_7BIT)
{
hi2c->Instance->OAR1 = (I2C_OAR1_OA1EN | hi2c->Init.OwnAddress1);
}
else /* I2C_ADDRESSINGMODE_10BIT */
{
hi2c->Instance->OAR1 = (I2C_OAR1_OA1EN | I2C_OAR1_OA1MODE | hi2c->Init.OwnAddress1);
}
/*---------------------------- I2Cx CR2 Configuration ----------------------*/
/* Configure I2Cx: Addressing Master mode */
if (hi2c->Init.AddressingMode == I2C_ADDRESSINGMODE_10BIT)
{
hi2c->Instance->CR2 = (I2C_CR2_ADD10);
}
/* Enable the AUTOEND by default, and enable NACK (should be disable only during Slave process */
hi2c->Instance->CR2 |= (I2C_CR2_AUTOEND | I2C_CR2_NACK);
/*---------------------------- I2Cx OAR2 Configuration ---------------------*/
/* Disable Own Address2 before set the Own Address2 configuration */
hi2c->Instance->OAR2 &= ~I2C_DUALADDRESS_ENABLE;
/* Configure I2Cx: Dual mode and Own Address2 */
hi2c->Instance->OAR2 = (hi2c->Init.DualAddressMode | hi2c->Init.OwnAddress2 | (hi2c->Init.OwnAddress2Masks << 8));
/*---------------------------- I2Cx CR1 Configuration ----------------------*/
/* Configure I2Cx: Generalcall and NoStretch mode */
hi2c->Instance->CR1 = (hi2c->Init.GeneralCallMode | hi2c->Init.NoStretchMode);
/* Enable the selected I2C peripheral */
__HAL_I2C_ENABLE(hi2c);
hi2c->ErrorCode = HAL_I2C_ERROR_NONE;
hi2c->State = HAL_I2C_STATE_READY;
hi2c->PreviousState = I2C_STATE_NONE;
hi2c->Mode = HAL_I2C_MODE_NONE;
return HAL_OK;
}
/**
* @brief DeInitialize the I2C peripheral.
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
* the configuration information for the specified I2C.
* @retval HAL status
*/
HAL_StatusTypeDef HAL_I2C_DeInit(I2C_HandleTypeDef *hi2c)
{
/* Check the I2C handle allocation */
if (hi2c == NULL)
{
return HAL_ERROR;
}
/* Check the parameters */
assert_param(IS_I2C_ALL_INSTANCE(hi2c->Instance));
hi2c->State = HAL_I2C_STATE_BUSY;
/* Disable the I2C Peripheral Clock */
__HAL_I2C_DISABLE(hi2c);
/* DeInit the low level hardware: GPIO, CLOCK, NVIC */
HAL_I2C_MspDeInit(hi2c);
hi2c->ErrorCode = HAL_I2C_ERROR_NONE;
hi2c->State = HAL_I2C_STATE_RESET;
hi2c->PreviousState = I2C_STATE_NONE;
hi2c->Mode = HAL_I2C_MODE_NONE;
/* Release Lock */
__HAL_UNLOCK(hi2c);
return HAL_OK;
}
/**
* @brief Initialize the I2C MSP.
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
* the configuration information for the specified I2C.
* @retval None
*/
__weak void HAL_I2C_MspInit(I2C_HandleTypeDef *hi2c)
{
/* Prevent unused argument(s) compilation warning */
UNUSED(hi2c);
/* NOTE : This function should not be modified, when the callback is needed,
the HAL_I2C_MspInit could be implemented in the user file
*/
}
/**
* @brief DeInitialize the I2C MSP.
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
* the configuration information for the specified I2C.
* @retval None
*/
__weak void HAL_I2C_MspDeInit(I2C_HandleTypeDef *hi2c)
{
/* Prevent unused argument(s) compilation warning */
UNUSED(hi2c);
/* NOTE : This function should not be modified, when the callback is needed,
the HAL_I2C_MspDeInit could be implemented in the user file
*/
}
/**
* @}
*/
/** @defgroup I2C_Exported_Functions_Group2 Input and Output operation functions
* @brief Data transfers functions
*
@verbatim
===============================================================================
##### IO operation functions #####
===============================================================================
[..]
This subsection provides a set of functions allowing to manage the I2C data
transfers.
(#) There are two modes of transfer:
(++) Blocking mode : The communication is performed in the polling mode.
The status of all data processing is returned by the same function
after finishing transfer.
(++) No-Blocking mode : The communication is performed using Interrupts
or DMA. These functions return the status of the transfer startup.
The end of the data processing will be indicated through the
dedicated I2C IRQ when using Interrupt mode or the DMA IRQ when
using DMA mode.
(#) Blocking mode functions are :
(++) HAL_I2C_Master_Transmit()
(++) HAL_I2C_Master_Receive()
(++) HAL_I2C_Slave_Transmit()
(++) HAL_I2C_Slave_Receive()
(++) HAL_I2C_Mem_Write()
(++) HAL_I2C_Mem_Read()
(++) HAL_I2C_IsDeviceReady()
(#) No-Blocking mode functions with Interrupt are :
(++) HAL_I2C_Master_Transmit_IT()
(++) HAL_I2C_Master_Receive_IT()
(++) HAL_I2C_Slave_Transmit_IT()
(++) HAL_I2C_Slave_Receive_IT()
(++) HAL_I2C_Mem_Write_IT()
(++) HAL_I2C_Mem_Read_IT()
(#) No-Blocking mode functions with DMA are :
(++) HAL_I2C_Master_Transmit_DMA()
(++) HAL_I2C_Master_Receive_DMA()
(++) HAL_I2C_Slave_Transmit_DMA()
(++) HAL_I2C_Slave_Receive_DMA()
(++) HAL_I2C_Mem_Write_DMA()
(++) HAL_I2C_Mem_Read_DMA()
(#) A set of Transfer Complete Callbacks are provided in non Blocking mode:
(++) HAL_I2C_MemTxCpltCallback()
(++) HAL_I2C_MemRxCpltCallback()
(++) HAL_I2C_MasterTxCpltCallback()
(++) HAL_I2C_MasterRxCpltCallback()
(++) HAL_I2C_SlaveTxCpltCallback()
(++) HAL_I2C_SlaveRxCpltCallback()
(++) HAL_I2C_ErrorCallback()
@endverbatim
* @{
*/
/**
* @brief Transmits in master mode an amount of data in blocking mode.
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
* the configuration information for the specified I2C.
* @param DevAddress Target device address: The device 7 bits address value
* in datasheet must be shift at right before call interface
* @param pData Pointer to data buffer
* @param Size Amount of data to be sent
* @param Timeout Timeout duration
* @retval HAL status
*/
HAL_StatusTypeDef HAL_I2C_Master_Transmit(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint8_t *pData, uint16_t Size, uint32_t Timeout)
{
uint32_t tickstart = 0U;
if (hi2c->State == HAL_I2C_STATE_READY)
{
/* Process Locked */
__HAL_LOCK(hi2c);
/* Init tickstart for timeout management*/
tickstart = HAL_GetTick();
if (I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_BUSY, SET, I2C_TIMEOUT_BUSY, tickstart) != HAL_OK)
{
return HAL_TIMEOUT;
}
hi2c->State = HAL_I2C_STATE_BUSY_TX;
hi2c->Mode = HAL_I2C_MODE_MASTER;
hi2c->ErrorCode = HAL_I2C_ERROR_NONE;
/* Prepare transfer parameters */
hi2c->pBuffPtr = pData;
hi2c->XferCount = Size;
hi2c->XferISR = NULL;
/* Send Slave Address */
/* Set NBYTES to write and reload if hi2c->XferCount > MAX_NBYTE_SIZE and generate RESTART */
if (hi2c->XferCount > MAX_NBYTE_SIZE)
{
hi2c->XferSize = MAX_NBYTE_SIZE;
I2C_TransferConfig(hi2c, DevAddress, hi2c->XferSize, I2C_RELOAD_MODE, I2C_GENERATE_START_WRITE);
}
else
{
hi2c->XferSize = hi2c->XferCount;
I2C_TransferConfig(hi2c, DevAddress, hi2c->XferSize, I2C_AUTOEND_MODE, I2C_GENERATE_START_WRITE);
}
while (hi2c->XferCount > 0U)
{
/* Wait until TXIS flag is set */
if (I2C_WaitOnTXISFlagUntilTimeout(hi2c, Timeout, tickstart) != HAL_OK)
{
if (hi2c->ErrorCode == HAL_I2C_ERROR_AF)
{
return HAL_ERROR;
}
else
{
return HAL_TIMEOUT;
}
}
/* Write data to TXDR */
hi2c->Instance->TXDR = (*hi2c->pBuffPtr++);
hi2c->XferCount--;
hi2c->XferSize--;
if ((hi2c->XferSize == 0U) && (hi2c->XferCount != 0U))
{
/* Wait until TCR flag is set */
if (I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_TCR, RESET, Timeout, tickstart) != HAL_OK)
{
return HAL_TIMEOUT;
}
if (hi2c->XferCount > MAX_NBYTE_SIZE)
{
hi2c->XferSize = MAX_NBYTE_SIZE;
I2C_TransferConfig(hi2c, DevAddress, hi2c->XferSize, I2C_RELOAD_MODE, I2C_NO_STARTSTOP);
}
else
{
hi2c->XferSize = hi2c->XferCount;
I2C_TransferConfig(hi2c, DevAddress, hi2c->XferSize, I2C_AUTOEND_MODE, I2C_NO_STARTSTOP);
}
}
}
/* No need to Check TC flag, with AUTOEND mode the stop is automatically generated */
/* Wait until STOPF flag is set */
if (I2C_WaitOnSTOPFlagUntilTimeout(hi2c, Timeout, tickstart) != HAL_OK)
{
if (hi2c->ErrorCode == HAL_I2C_ERROR_AF)
{
return HAL_ERROR;
}
else
{
return HAL_TIMEOUT;
}
}
/* Clear STOP Flag */
__HAL_I2C_CLEAR_FLAG(hi2c, I2C_FLAG_STOPF);
/* Clear Configuration Register 2 */
I2C_RESET_CR2(hi2c);
hi2c->State = HAL_I2C_STATE_READY;
hi2c->Mode = HAL_I2C_MODE_NONE;
/* Process Unlocked */
__HAL_UNLOCK(hi2c);
return HAL_OK;
}
else
{
return HAL_BUSY;
}
}
/**
* @brief Receives in master mode an amount of data in blocking mode.
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
* the configuration information for the specified I2C.
* @param DevAddress Target device address: The device 7 bits address value
* in datasheet must be shift at right before call interface
* @param pData Pointer to data buffer
* @param Size Amount of data to be sent
* @param Timeout Timeout duration
* @retval HAL status
*/
HAL_StatusTypeDef HAL_I2C_Master_Receive(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint8_t *pData, uint16_t Size, uint32_t Timeout)
{
uint32_t tickstart = 0U;
if (hi2c->State == HAL_I2C_STATE_READY)
{
/* Process Locked */
__HAL_LOCK(hi2c);
/* Init tickstart for timeout management*/
tickstart = HAL_GetTick();
if (I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_BUSY, SET, I2C_TIMEOUT_BUSY, tickstart) != HAL_OK)
{
return HAL_TIMEOUT;
}
hi2c->State = HAL_I2C_STATE_BUSY_RX;
hi2c->Mode = HAL_I2C_MODE_MASTER;
hi2c->ErrorCode = HAL_I2C_ERROR_NONE;
/* Prepare transfer parameters */
hi2c->pBuffPtr = pData;
hi2c->XferCount = Size;
hi2c->XferISR = NULL;
/* Send Slave Address */
/* Set NBYTES to write and reload if hi2c->XferCount > MAX_NBYTE_SIZE and generate RESTART */
if (hi2c->XferCount > MAX_NBYTE_SIZE)
{
hi2c->XferSize = MAX_NBYTE_SIZE;
I2C_TransferConfig(hi2c, DevAddress, hi2c->XferSize, I2C_RELOAD_MODE, I2C_GENERATE_START_READ);
}
else
{
hi2c->XferSize = hi2c->XferCount;
I2C_TransferConfig(hi2c, DevAddress, hi2c->XferSize, I2C_AUTOEND_MODE, I2C_GENERATE_START_READ);
}
while (hi2c->XferCount > 0U)
{
/* Wait until RXNE flag is set */
if (I2C_WaitOnRXNEFlagUntilTimeout(hi2c, Timeout, tickstart) != HAL_OK)
{
if (hi2c->ErrorCode == HAL_I2C_ERROR_AF)
{
return HAL_ERROR;
}
else
{
return HAL_TIMEOUT;
}
}
/* Read data from RXDR */
(*hi2c->pBuffPtr++) = hi2c->Instance->RXDR;
hi2c->XferSize--;
hi2c->XferCount--;
if ((hi2c->XferSize == 0U) && (hi2c->XferCount != 0U))
{
/* Wait until TCR flag is set */
if (I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_TCR, RESET, Timeout, tickstart) != HAL_OK)
{
return HAL_TIMEOUT;
}
if (hi2c->XferCount > MAX_NBYTE_SIZE)
{
hi2c->XferSize = MAX_NBYTE_SIZE;
I2C_TransferConfig(hi2c, DevAddress, hi2c->XferSize, I2C_RELOAD_MODE, I2C_NO_STARTSTOP);
}
else
{
hi2c->XferSize = hi2c->XferCount;
I2C_TransferConfig(hi2c, DevAddress, hi2c->XferSize, I2C_AUTOEND_MODE, I2C_NO_STARTSTOP);
}
}
}
/* No need to Check TC flag, with AUTOEND mode the stop is automatically generated */
/* Wait until STOPF flag is set */
if (I2C_WaitOnSTOPFlagUntilTimeout(hi2c, Timeout, tickstart) != HAL_OK)
{
if (hi2c->ErrorCode == HAL_I2C_ERROR_AF)
{
return HAL_ERROR;
}
else
{
return HAL_TIMEOUT;
}
}
/* Clear STOP Flag */
__HAL_I2C_CLEAR_FLAG(hi2c, I2C_FLAG_STOPF);
/* Clear Configuration Register 2 */
I2C_RESET_CR2(hi2c);
hi2c->State = HAL_I2C_STATE_READY;
hi2c->Mode = HAL_I2C_MODE_NONE;
/* Process Unlocked */
__HAL_UNLOCK(hi2c);
return HAL_OK;
}
else
{
return HAL_BUSY;
}
}
/**
* @brief Transmits in slave mode an amount of data in blocking mode.
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
* the configuration information for the specified I2C.
* @param pData Pointer to data buffer
* @param Size Amount of data to be sent
* @param Timeout Timeout duration
* @retval HAL status
*/
HAL_StatusTypeDef HAL_I2C_Slave_Transmit(I2C_HandleTypeDef *hi2c, uint8_t *pData, uint16_t Size, uint32_t Timeout)
{
uint32_t tickstart = 0U;
if (hi2c->State == HAL_I2C_STATE_READY)
{
if ((pData == NULL) || (Size == 0U))
{
return HAL_ERROR;
}
/* Process Locked */
__HAL_LOCK(hi2c);
/* Init tickstart for timeout management*/
tickstart = HAL_GetTick();
hi2c->State = HAL_I2C_STATE_BUSY_TX;
hi2c->Mode = HAL_I2C_MODE_SLAVE;
hi2c->ErrorCode = HAL_I2C_ERROR_NONE;
/* Prepare transfer parameters */
hi2c->pBuffPtr = pData;
hi2c->XferCount = Size;
hi2c->XferISR = NULL;
/* Enable Address Acknowledge */
hi2c->Instance->CR2 &= ~I2C_CR2_NACK;
/* Wait until ADDR flag is set */
if (I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_ADDR, RESET, Timeout, tickstart) != HAL_OK)
{
/* Disable Address Acknowledge */
hi2c->Instance->CR2 |= I2C_CR2_NACK;
return HAL_TIMEOUT;
}
/* Clear ADDR flag */
__HAL_I2C_CLEAR_FLAG(hi2c, I2C_FLAG_ADDR);
/* If 10bit addressing mode is selected */
if (hi2c->Init.AddressingMode == I2C_ADDRESSINGMODE_10BIT)
{
/* Wait until ADDR flag is set */
if (I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_ADDR, RESET, Timeout, tickstart) != HAL_OK)
{
/* Disable Address Acknowledge */
hi2c->Instance->CR2 |= I2C_CR2_NACK;
return HAL_TIMEOUT;
}
/* Clear ADDR flag */
__HAL_I2C_CLEAR_FLAG(hi2c, I2C_FLAG_ADDR);
}
/* Wait until DIR flag is set Transmitter mode */
if (I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_DIR, RESET, Timeout, tickstart) != HAL_OK)
{
/* Disable Address Acknowledge */
hi2c->Instance->CR2 |= I2C_CR2_NACK;
return HAL_TIMEOUT;
}
while (hi2c->XferCount > 0U)
{
/* Wait until TXIS flag is set */
if (I2C_WaitOnTXISFlagUntilTimeout(hi2c, Timeout, tickstart) != HAL_OK)
{
/* Disable Address Acknowledge */
hi2c->Instance->CR2 |= I2C_CR2_NACK;
if (hi2c->ErrorCode == HAL_I2C_ERROR_AF)
{
return HAL_ERROR;
}
else
{
return HAL_TIMEOUT;
}
}
/* Write data to TXDR */
hi2c->Instance->TXDR = (*hi2c->pBuffPtr++);
hi2c->XferCount--;
}
/* Wait until STOP flag is set */
if (I2C_WaitOnSTOPFlagUntilTimeout(hi2c, Timeout, tickstart) != HAL_OK)
{
/* Disable Address Acknowledge */
hi2c->Instance->CR2 |= I2C_CR2_NACK;
if (hi2c->ErrorCode == HAL_I2C_ERROR_AF)
{
/* Normal use case for Transmitter mode */
/* A NACK is generated to confirm the end of transfer */
hi2c->ErrorCode = HAL_I2C_ERROR_NONE;
}
else
{
return HAL_TIMEOUT;
}
}
/* Clear STOP flag */
__HAL_I2C_CLEAR_FLAG(hi2c, I2C_FLAG_STOPF);
/* Wait until BUSY flag is reset */
if (I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_BUSY, SET, Timeout, tickstart) != HAL_OK)
{
/* Disable Address Acknowledge */
hi2c->Instance->CR2 |= I2C_CR2_NACK;
return HAL_TIMEOUT;
}
/* Disable Address Acknowledge */
hi2c->Instance->CR2 |= I2C_CR2_NACK;
hi2c->State = HAL_I2C_STATE_READY;
hi2c->Mode = HAL_I2C_MODE_NONE;
/* Process Unlocked */
__HAL_UNLOCK(hi2c);
return HAL_OK;
}
else
{