/** | |
****************************************************************************** | |
* @file stm32l4xx_hal_i2c_ex.c | |
* @author MCD Application Team | |
* @brief I2C Extended HAL module driver. | |
* This file provides firmware functions to manage the following | |
* functionalities of I2C Extended peripheral: | |
* + Extended features functions | |
* | |
@verbatim | |
============================================================================== | |
##### I2C peripheral Extended features ##### | |
============================================================================== | |
[..] Comparing to other previous devices, the I2C interface for STM32L4xx | |
devices contains the following additional features | |
(+) Possibility to disable or enable Analog Noise Filter | |
(+) Use of a configured Digital Noise Filter | |
(+) Disable or enable wakeup from Stop mode(s) | |
(+) Disable or enable Fast Mode Plus | |
##### How to use this driver ##### | |
============================================================================== | |
[..] This driver provides functions to configure Noise Filter and Wake Up Feature | |
(#) Configure I2C Analog noise filter using the function HAL_I2CEx_ConfigAnalogFilter() | |
(#) Configure I2C Digital noise filter using the function HAL_I2CEx_ConfigDigitalFilter() | |
(#) Configure the enable or disable of I2C Wake Up Mode using the functions : | |
(++) HAL_I2CEx_EnableWakeUp() | |
(++) HAL_I2CEx_DisableWakeUp() | |
(#) Configure the enable or disable of fast mode plus driving capability using the functions : | |
(++) HAL_I2CEx_EnableFastModePlus() | |
(++) HAL_I2CEx_DisableFastModePlus() | |
@endverbatim | |
****************************************************************************** | |
* @attention | |
* | |
* <h2><center>© Copyright (c) 2017 STMicroelectronics. | |
* All rights reserved.</center></h2> | |
* | |
* 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 | |
* | |
****************************************************************************** | |
*/ | |
/* Includes ------------------------------------------------------------------*/ | |
#include "stm32l4xx_hal.h" | |
/** @addtogroup STM32L4xx_HAL_Driver | |
* @{ | |
*/ | |
/** @defgroup I2CEx I2CEx | |
* @brief I2C Extended HAL module driver | |
* @{ | |
*/ | |
#ifdef HAL_I2C_MODULE_ENABLED | |
/* Private typedef -----------------------------------------------------------*/ | |
/* Private define ------------------------------------------------------------*/ | |
/* Private macro -------------------------------------------------------------*/ | |
/* Private variables ---------------------------------------------------------*/ | |
/* Private function prototypes -----------------------------------------------*/ | |
/* Private functions ---------------------------------------------------------*/ | |
/** @defgroup I2CEx_Exported_Functions I2C Extended Exported Functions | |
* @{ | |
*/ | |
/** @defgroup I2CEx_Exported_Functions_Group1 Extended features functions | |
* @brief Extended features functions | |
* | |
@verbatim | |
=============================================================================== | |
##### Extended features functions ##### | |
=============================================================================== | |
[..] This section provides functions allowing to: | |
(+) Configure Noise Filters | |
(+) Configure Wake Up Feature | |
(+) Configure Fast Mode Plus | |
@endverbatim | |
* @{ | |
*/ | |
/** | |
* @brief Configure I2C Analog noise filter. | |
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains | |
* the configuration information for the specified I2Cx peripheral. | |
* @param AnalogFilter New state of the Analog filter. | |
* @retval HAL status | |
*/ | |
HAL_StatusTypeDef HAL_I2CEx_ConfigAnalogFilter(I2C_HandleTypeDef *hi2c, uint32_t AnalogFilter) | |
{ | |
/* Check the parameters */ | |
assert_param(IS_I2C_ALL_INSTANCE(hi2c->Instance)); | |
assert_param(IS_I2C_ANALOG_FILTER(AnalogFilter)); | |
if (hi2c->State == HAL_I2C_STATE_READY) | |
{ | |
/* Process Locked */ | |
__HAL_LOCK(hi2c); | |
hi2c->State = HAL_I2C_STATE_BUSY; | |
/* Disable the selected I2C peripheral */ | |
__HAL_I2C_DISABLE(hi2c); | |
/* Reset I2Cx ANOFF bit */ | |
hi2c->Instance->CR1 &= ~(I2C_CR1_ANFOFF); | |
/* Set analog filter bit*/ | |
hi2c->Instance->CR1 |= AnalogFilter; | |
__HAL_I2C_ENABLE(hi2c); | |
hi2c->State = HAL_I2C_STATE_READY; | |
/* Process Unlocked */ | |
__HAL_UNLOCK(hi2c); | |
return HAL_OK; | |
} | |
else | |
{ | |
return HAL_BUSY; | |
} | |
} | |
/** | |
* @brief Configure I2C Digital noise filter. | |
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains | |
* the configuration information for the specified I2Cx peripheral. | |
* @param DigitalFilter Coefficient of digital noise filter between Min_Data=0x00 and Max_Data=0x0F. | |
* @retval HAL status | |
*/ | |
HAL_StatusTypeDef HAL_I2CEx_ConfigDigitalFilter(I2C_HandleTypeDef *hi2c, uint32_t DigitalFilter) | |
{ | |
uint32_t tmpreg; | |
/* Check the parameters */ | |
assert_param(IS_I2C_ALL_INSTANCE(hi2c->Instance)); | |
assert_param(IS_I2C_DIGITAL_FILTER(DigitalFilter)); | |
if (hi2c->State == HAL_I2C_STATE_READY) | |
{ | |
/* Process Locked */ | |
__HAL_LOCK(hi2c); | |
hi2c->State = HAL_I2C_STATE_BUSY; | |
/* Disable the selected I2C peripheral */ | |
__HAL_I2C_DISABLE(hi2c); | |
/* Get the old register value */ | |
tmpreg = hi2c->Instance->CR1; | |
/* Reset I2Cx DNF bits [11:8] */ | |
tmpreg &= ~(I2C_CR1_DNF); | |
/* Set I2Cx DNF coefficient */ | |
tmpreg |= DigitalFilter << 8U; | |
/* Store the new register value */ | |
hi2c->Instance->CR1 = tmpreg; | |
__HAL_I2C_ENABLE(hi2c); | |
hi2c->State = HAL_I2C_STATE_READY; | |
/* Process Unlocked */ | |
__HAL_UNLOCK(hi2c); | |
return HAL_OK; | |
} | |
else | |
{ | |
return HAL_BUSY; | |
} | |
} | |
/** | |
* @brief Enable I2C wakeup from Stop mode(s). | |
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains | |
* the configuration information for the specified I2Cx peripheral. | |
* @retval HAL status | |
*/ | |
HAL_StatusTypeDef HAL_I2CEx_EnableWakeUp(I2C_HandleTypeDef *hi2c) | |
{ | |
/* Check the parameters */ | |
assert_param(IS_I2C_WAKEUP_FROMSTOP_INSTANCE(hi2c->Instance)); | |
if (hi2c->State == HAL_I2C_STATE_READY) | |
{ | |
/* Process Locked */ | |
__HAL_LOCK(hi2c); | |
hi2c->State = HAL_I2C_STATE_BUSY; | |
/* Disable the selected I2C peripheral */ | |
__HAL_I2C_DISABLE(hi2c); | |
/* Enable wakeup from stop mode */ | |
hi2c->Instance->CR1 |= I2C_CR1_WUPEN; | |
__HAL_I2C_ENABLE(hi2c); | |
hi2c->State = HAL_I2C_STATE_READY; | |
/* Process Unlocked */ | |
__HAL_UNLOCK(hi2c); | |
return HAL_OK; | |
} | |
else | |
{ | |
return HAL_BUSY; | |
} | |
} | |
/** | |
* @brief Disable I2C wakeup from Stop mode(s). | |
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains | |
* the configuration information for the specified I2Cx peripheral. | |
* @retval HAL status | |
*/ | |
HAL_StatusTypeDef HAL_I2CEx_DisableWakeUp(I2C_HandleTypeDef *hi2c) | |
{ | |
/* Check the parameters */ | |
assert_param(IS_I2C_WAKEUP_FROMSTOP_INSTANCE(hi2c->Instance)); | |
if (hi2c->State == HAL_I2C_STATE_READY) | |
{ | |
/* Process Locked */ | |
__HAL_LOCK(hi2c); | |
hi2c->State = HAL_I2C_STATE_BUSY; | |
/* Disable the selected I2C peripheral */ | |
__HAL_I2C_DISABLE(hi2c); | |
/* Enable wakeup from stop mode */ | |
hi2c->Instance->CR1 &= ~(I2C_CR1_WUPEN); | |
__HAL_I2C_ENABLE(hi2c); | |
hi2c->State = HAL_I2C_STATE_READY; | |
/* Process Unlocked */ | |
__HAL_UNLOCK(hi2c); | |
return HAL_OK; | |
} | |
else | |
{ | |
return HAL_BUSY; | |
} | |
} | |
/** | |
* @brief Enable the I2C fast mode plus driving capability. | |
* @param ConfigFastModePlus Selects the pin. | |
* This parameter can be one of the @ref I2CEx_FastModePlus values | |
* @note For I2C1, fast mode plus driving capability can be enabled on all selected | |
* I2C1 pins using I2C_FASTMODEPLUS_I2C1 parameter or independently | |
* on each one of the following pins PB6, PB7, PB8 and PB9. | |
* @note For remaining I2C1 pins (PA14, PA15...) fast mode plus driving capability | |
* can be enabled only by using I2C_FASTMODEPLUS_I2C1 parameter. | |
* @note For all I2C2 pins fast mode plus driving capability can be enabled | |
* only by using I2C_FASTMODEPLUS_I2C2 parameter. | |
* @note For all I2C3 pins fast mode plus driving capability can be enabled | |
* only by using I2C_FASTMODEPLUS_I2C3 parameter. | |
* @note For all I2C4 pins fast mode plus driving capability can be enabled | |
* only by using I2C_FASTMODEPLUS_I2C4 parameter. | |
* @retval None | |
*/ | |
void HAL_I2CEx_EnableFastModePlus(uint32_t ConfigFastModePlus) | |
{ | |
/* Check the parameter */ | |
assert_param(IS_I2C_FASTMODEPLUS(ConfigFastModePlus)); | |
/* Enable SYSCFG clock */ | |
__HAL_RCC_SYSCFG_CLK_ENABLE(); | |
/* Enable fast mode plus driving capability for selected pin */ | |
SET_BIT(SYSCFG->CFGR1, (uint32_t)ConfigFastModePlus); | |
} | |
/** | |
* @brief Disable the I2C fast mode plus driving capability. | |
* @param ConfigFastModePlus Selects the pin. | |
* This parameter can be one of the @ref I2CEx_FastModePlus values | |
* @note For I2C1, fast mode plus driving capability can be disabled on all selected | |
* I2C1 pins using I2C_FASTMODEPLUS_I2C1 parameter or independently | |
* on each one of the following pins PB6, PB7, PB8 and PB9. | |
* @note For remaining I2C1 pins (PA14, PA15...) fast mode plus driving capability | |
* can be disabled only by using I2C_FASTMODEPLUS_I2C1 parameter. | |
* @note For all I2C2 pins fast mode plus driving capability can be disabled | |
* only by using I2C_FASTMODEPLUS_I2C2 parameter. | |
* @note For all I2C3 pins fast mode plus driving capability can be disabled | |
* only by using I2C_FASTMODEPLUS_I2C3 parameter. | |
* @note For all I2C4 pins fast mode plus driving capability can be disabled | |
* only by using I2C_FASTMODEPLUS_I2C4 parameter. | |
* @retval None | |
*/ | |
void HAL_I2CEx_DisableFastModePlus(uint32_t ConfigFastModePlus) | |
{ | |
/* Check the parameter */ | |
assert_param(IS_I2C_FASTMODEPLUS(ConfigFastModePlus)); | |
/* Enable SYSCFG clock */ | |
__HAL_RCC_SYSCFG_CLK_ENABLE(); | |
/* Disable fast mode plus driving capability for selected pin */ | |
CLEAR_BIT(SYSCFG->CFGR1, (uint32_t)ConfigFastModePlus); | |
} | |
/** | |
* @} | |
*/ | |
/** | |
* @} | |
*/ | |
#endif /* HAL_I2C_MODULE_ENABLED */ | |
/** | |
* @} | |
*/ | |
/** | |
* @} | |
*/ | |
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ |