/** | |
****************************************************************************** | |
* @file stm32l4xx_ll_i2c.c | |
* @author MCD Application Team | |
* @version V1.6.0 | |
* @date 28-October-2016 | |
* @brief I2C LL module driver. | |
****************************************************************************** | |
* @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. | |
* | |
****************************************************************************** | |
*/ | |
#if defined(USE_FULL_LL_DRIVER) | |
/* Includes ------------------------------------------------------------------*/ | |
#include "stm32l4xx_ll_i2c.h" | |
#include "stm32l4xx_ll_bus.h" | |
#ifdef USE_FULL_ASSERT | |
#include "stm32_assert.h" | |
#else | |
#define assert_param(expr) ((void)0U) | |
#endif | |
/** @addtogroup STM32L4xx_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__) <= (uint32_t)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 | |
*/ | |
uint32_t 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); | |
} | |
#if defined(I2C2) | |
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); | |
} | |
#endif | |
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_GRP2_ForceReset(LL_APB1_GRP2_PERIPH_I2C4); | |
/* Release reset of I2C clock */ | |
LL_APB1_GRP2_ReleaseReset(LL_APB1_GRP2_PERIPH_I2C4); | |
} | |
#endif | |
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 | |
*/ | |
uint32_t 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); | |
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 */ | |
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ |