243 lines
7.8 KiB
C
243 lines
7.8 KiB
C
/**
|
|
******************************************************************************
|
|
* @file stm32f7xx_ll_i2c.c
|
|
* @author MCD Application Team
|
|
* @brief I2C LL module driver.
|
|
******************************************************************************
|
|
* @attention
|
|
*
|
|
* Copyright (c) 2017 STMicroelectronics.
|
|
* All rights reserved.
|
|
*
|
|
* 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.
|
|
*
|
|
******************************************************************************
|
|
*/
|
|
#if defined(USE_FULL_LL_DRIVER)
|
|
|
|
/* Includes ------------------------------------------------------------------*/
|
|
#include "stm32f7xx_ll_i2c.h"
|
|
#include "stm32f7xx_ll_bus.h"
|
|
#ifdef USE_FULL_ASSERT
|
|
#include "stm32_assert.h"
|
|
#else
|
|
#define assert_param(expr) ((void)0U)
|
|
#endif /* USE_FULL_ASSERT */
|
|
|
|
/** @addtogroup STM32F7xx_LL_Driver
|
|
* @{
|
|
*/
|
|
|
|
#if defined (I2C1) || defined (I2C2) || defined (I2C3) || defined (I2C4)
|
|
|
|
/** @defgroup I2C_LL I2C
|
|
* @{
|
|
*/
|
|
|
|
/* Private types -------------------------------------------------------------*/
|
|
/* Private variables ---------------------------------------------------------*/
|
|
/* Private constants ---------------------------------------------------------*/
|
|
/* Private macros ------------------------------------------------------------*/
|
|
/** @addtogroup I2C_LL_Private_Macros
|
|
* @{
|
|
*/
|
|
|
|
#define IS_LL_I2C_PERIPHERAL_MODE(__VALUE__) (((__VALUE__) == LL_I2C_MODE_I2C) || \
|
|
((__VALUE__) == LL_I2C_MODE_SMBUS_HOST) || \
|
|
((__VALUE__) == LL_I2C_MODE_SMBUS_DEVICE) || \
|
|
((__VALUE__) == LL_I2C_MODE_SMBUS_DEVICE_ARP))
|
|
|
|
#define IS_LL_I2C_ANALOG_FILTER(__VALUE__) (((__VALUE__) == LL_I2C_ANALOGFILTER_ENABLE) || \
|
|
((__VALUE__) == LL_I2C_ANALOGFILTER_DISABLE))
|
|
|
|
#define IS_LL_I2C_DIGITAL_FILTER(__VALUE__) ((__VALUE__) <= 0x0000000FU)
|
|
|
|
#define IS_LL_I2C_OWN_ADDRESS1(__VALUE__) ((__VALUE__) <= 0x000003FFU)
|
|
|
|
#define IS_LL_I2C_TYPE_ACKNOWLEDGE(__VALUE__) (((__VALUE__) == LL_I2C_ACK) || \
|
|
((__VALUE__) == LL_I2C_NACK))
|
|
|
|
#define IS_LL_I2C_OWN_ADDRSIZE(__VALUE__) (((__VALUE__) == LL_I2C_OWNADDRESS1_7BIT) || \
|
|
((__VALUE__) == LL_I2C_OWNADDRESS1_10BIT))
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
/* Private function prototypes -----------------------------------------------*/
|
|
|
|
/* Exported functions --------------------------------------------------------*/
|
|
/** @addtogroup I2C_LL_Exported_Functions
|
|
* @{
|
|
*/
|
|
|
|
/** @addtogroup I2C_LL_EF_Init
|
|
* @{
|
|
*/
|
|
|
|
/**
|
|
* @brief De-initialize the I2C registers to their default reset values.
|
|
* @param I2Cx I2C Instance.
|
|
* @retval An ErrorStatus enumeration value:
|
|
* - SUCCESS: I2C registers are de-initialized
|
|
* - ERROR: I2C registers are not de-initialized
|
|
*/
|
|
ErrorStatus LL_I2C_DeInit(I2C_TypeDef *I2Cx)
|
|
{
|
|
ErrorStatus status = SUCCESS;
|
|
|
|
/* Check the I2C Instance I2Cx */
|
|
assert_param(IS_I2C_ALL_INSTANCE(I2Cx));
|
|
|
|
if (I2Cx == I2C1)
|
|
{
|
|
/* Force reset of I2C clock */
|
|
LL_APB1_GRP1_ForceReset(LL_APB1_GRP1_PERIPH_I2C1);
|
|
|
|
/* Release reset of I2C clock */
|
|
LL_APB1_GRP1_ReleaseReset(LL_APB1_GRP1_PERIPH_I2C1);
|
|
}
|
|
else if (I2Cx == I2C2)
|
|
{
|
|
/* Force reset of I2C clock */
|
|
LL_APB1_GRP1_ForceReset(LL_APB1_GRP1_PERIPH_I2C2);
|
|
|
|
/* Release reset of I2C clock */
|
|
LL_APB1_GRP1_ReleaseReset(LL_APB1_GRP1_PERIPH_I2C2);
|
|
|
|
}
|
|
else if (I2Cx == I2C3)
|
|
{
|
|
/* Force reset of I2C clock */
|
|
LL_APB1_GRP1_ForceReset(LL_APB1_GRP1_PERIPH_I2C3);
|
|
|
|
/* Release reset of I2C clock */
|
|
LL_APB1_GRP1_ReleaseReset(LL_APB1_GRP1_PERIPH_I2C3);
|
|
}
|
|
#if defined(I2C4)
|
|
else if (I2Cx == I2C4)
|
|
{
|
|
/* Force reset of I2C clock */
|
|
LL_APB1_GRP1_ForceReset(LL_APB1_GRP1_PERIPH_I2C4);
|
|
|
|
/* Release reset of I2C clock */
|
|
LL_APB1_GRP1_ReleaseReset(LL_APB1_GRP1_PERIPH_I2C4);
|
|
}
|
|
#endif /* I2C4 */
|
|
else
|
|
{
|
|
status = ERROR;
|
|
}
|
|
|
|
return status;
|
|
}
|
|
|
|
/**
|
|
* @brief Initialize the I2C registers according to the specified parameters in I2C_InitStruct.
|
|
* @param I2Cx I2C Instance.
|
|
* @param I2C_InitStruct pointer to a @ref LL_I2C_InitTypeDef structure.
|
|
* @retval An ErrorStatus enumeration value:
|
|
* - SUCCESS: I2C registers are initialized
|
|
* - ERROR: Not applicable
|
|
*/
|
|
ErrorStatus LL_I2C_Init(I2C_TypeDef *I2Cx, LL_I2C_InitTypeDef *I2C_InitStruct)
|
|
{
|
|
/* Check the I2C Instance I2Cx */
|
|
assert_param(IS_I2C_ALL_INSTANCE(I2Cx));
|
|
|
|
/* Check the I2C parameters from I2C_InitStruct */
|
|
assert_param(IS_LL_I2C_PERIPHERAL_MODE(I2C_InitStruct->PeripheralMode));
|
|
assert_param(IS_LL_I2C_ANALOG_FILTER(I2C_InitStruct->AnalogFilter));
|
|
assert_param(IS_LL_I2C_DIGITAL_FILTER(I2C_InitStruct->DigitalFilter));
|
|
assert_param(IS_LL_I2C_OWN_ADDRESS1(I2C_InitStruct->OwnAddress1));
|
|
assert_param(IS_LL_I2C_TYPE_ACKNOWLEDGE(I2C_InitStruct->TypeAcknowledge));
|
|
assert_param(IS_LL_I2C_OWN_ADDRSIZE(I2C_InitStruct->OwnAddrSize));
|
|
|
|
/* Disable the selected I2Cx Peripheral */
|
|
LL_I2C_Disable(I2Cx);
|
|
|
|
/*---------------------------- I2Cx CR1 Configuration ------------------------
|
|
* Configure the analog and digital noise filters with parameters :
|
|
* - AnalogFilter: I2C_CR1_ANFOFF bit
|
|
* - DigitalFilter: I2C_CR1_DNF[3:0] bits
|
|
*/
|
|
LL_I2C_ConfigFilters(I2Cx, I2C_InitStruct->AnalogFilter, I2C_InitStruct->DigitalFilter);
|
|
|
|
/*---------------------------- I2Cx TIMINGR Configuration --------------------
|
|
* Configure the SDA setup, hold time and the SCL high, low period with parameter :
|
|
* - Timing: I2C_TIMINGR_PRESC[3:0], I2C_TIMINGR_SCLDEL[3:0], I2C_TIMINGR_SDADEL[3:0],
|
|
* I2C_TIMINGR_SCLH[7:0] and I2C_TIMINGR_SCLL[7:0] bits
|
|
*/
|
|
LL_I2C_SetTiming(I2Cx, I2C_InitStruct->Timing);
|
|
|
|
/* Enable the selected I2Cx Peripheral */
|
|
LL_I2C_Enable(I2Cx);
|
|
|
|
/*---------------------------- I2Cx OAR1 Configuration -----------------------
|
|
* Disable, Configure and Enable I2Cx device own address 1 with parameters :
|
|
* - OwnAddress1: I2C_OAR1_OA1[9:0] bits
|
|
* - OwnAddrSize: I2C_OAR1_OA1MODE bit
|
|
*/
|
|
LL_I2C_DisableOwnAddress1(I2Cx);
|
|
LL_I2C_SetOwnAddress1(I2Cx, I2C_InitStruct->OwnAddress1, I2C_InitStruct->OwnAddrSize);
|
|
|
|
/* OwnAdress1 == 0 is reserved for General Call address */
|
|
if (I2C_InitStruct->OwnAddress1 != 0U)
|
|
{
|
|
LL_I2C_EnableOwnAddress1(I2Cx);
|
|
}
|
|
|
|
/*---------------------------- I2Cx MODE Configuration -----------------------
|
|
* Configure I2Cx peripheral mode with parameter :
|
|
* - PeripheralMode: I2C_CR1_SMBDEN and I2C_CR1_SMBHEN bits
|
|
*/
|
|
LL_I2C_SetMode(I2Cx, I2C_InitStruct->PeripheralMode);
|
|
|
|
/*---------------------------- I2Cx CR2 Configuration ------------------------
|
|
* Configure the ACKnowledge or Non ACKnowledge condition
|
|
* after the address receive match code or next received byte with parameter :
|
|
* - TypeAcknowledge: I2C_CR2_NACK bit
|
|
*/
|
|
LL_I2C_AcknowledgeNextData(I2Cx, I2C_InitStruct->TypeAcknowledge);
|
|
|
|
return SUCCESS;
|
|
}
|
|
|
|
/**
|
|
* @brief Set each @ref LL_I2C_InitTypeDef field to default value.
|
|
* @param I2C_InitStruct Pointer to a @ref LL_I2C_InitTypeDef structure.
|
|
* @retval None
|
|
*/
|
|
void LL_I2C_StructInit(LL_I2C_InitTypeDef *I2C_InitStruct)
|
|
{
|
|
/* Set I2C_InitStruct fields to default values */
|
|
I2C_InitStruct->PeripheralMode = LL_I2C_MODE_I2C;
|
|
I2C_InitStruct->Timing = 0U;
|
|
I2C_InitStruct->AnalogFilter = LL_I2C_ANALOGFILTER_ENABLE;
|
|
I2C_InitStruct->DigitalFilter = 0U;
|
|
I2C_InitStruct->OwnAddress1 = 0U;
|
|
I2C_InitStruct->TypeAcknowledge = LL_I2C_NACK;
|
|
I2C_InitStruct->OwnAddrSize = LL_I2C_OWNADDRESS1_7BIT;
|
|
}
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
#endif /* I2C1 || I2C2 || I2C3 || I2C4 */
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
#endif /* USE_FULL_LL_DRIVER */
|