/** | |
****************************************************************************** | |
* @file stm32f4xx_ll_i2c.c | |
* @author MCD Application Team | |
* @version V1.7.0 | |
* @date 17-February-2017 | |
* @brief I2C LL module driver. | |
****************************************************************************** | |
* @attention | |
* | |
* <h2><center>© COPYRIGHT(c) 2017 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 "stm32f4xx_ll_i2c.h" | |
#include "stm32f4xx_ll_bus.h" | |
#include "stm32f4xx_ll_rcc.h" | |
#ifdef USE_FULL_ASSERT | |
#include "stm32_assert.h" | |
#else | |
#define assert_param(expr) ((void)0U) | |
#endif | |
/** @addtogroup STM32F4xx_LL_Driver | |
* @{ | |
*/ | |
#if defined (I2C1) || defined (I2C2) || defined (I2C3) | |
/** @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_I2C_CLOCK_SPEED(__VALUE__) (((__VALUE__) > 0U) && ((__VALUE__) <= LL_I2C_MAX_SPEED_FAST)) | |
#define IS_I2C_DUTY_CYCLE(__VALUE__) (((__VALUE__) == LL_I2C_DUTYCYCLE_2) || \ | |
((__VALUE__) == LL_I2C_DUTYCYCLE_16_9)) | |
#if defined(I2C_FLTR_ANOFF)&&defined(I2C_FLTR_DNF) | |
#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) | |
#endif | |
#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 | |
*/ | |
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); | |
} | |
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); | |
} | |
#if defined(I2C3) | |
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); | |
} | |
#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) | |
{ | |
LL_RCC_ClocksTypeDef rcc_clocks; | |
/* 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_I2C_CLOCK_SPEED(I2C_InitStruct->ClockSpeed)); | |
assert_param(IS_I2C_DUTY_CYCLE(I2C_InitStruct->DutyCycle)); | |
#if defined(I2C_FLTR_ANOFF)&&defined(I2C_FLTR_DNF) | |
assert_param(IS_LL_I2C_ANALOG_FILTER(I2C_InitStruct->AnalogFilter)); | |
assert_param(IS_LL_I2C_DIGITAL_FILTER(I2C_InitStruct->DigitalFilter)); | |
#endif | |
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); | |
/* Retrieve Clock frequencies */ | |
LL_RCC_GetSystemClocksFreq(&rcc_clocks); | |
#if defined(I2C_FLTR_ANOFF)&&defined(I2C_FLTR_DNF) | |
/*---------------------------- I2Cx FLTR Configuration ----------------------- | |
* Configure the analog and digital noise filters with parameters : | |
* - AnalogFilter: I2C_FLTR_ANFOFF bit | |
* - DigitalFilter: I2C_FLTR_DNF[3:0] bits | |
*/ | |
LL_I2C_ConfigFilters(I2Cx, I2C_InitStruct->AnalogFilter, I2C_InitStruct->DigitalFilter); | |
#endif | |
/*---------------------------- I2Cx SCL Clock Speed Configuration ------------ | |
* Configure the SCL speed : | |
* - ClockSpeed: I2C_CR2_FREQ[5:0], I2C_TRISE_TRISE[5:0], I2C_CCR_FS, | |
* and I2C_CCR_CCR[11:0] bits | |
* - DutyCycle: I2C_CCR_DUTY[7:0] bits | |
*/ | |
LL_I2C_ConfigSpeed(I2Cx, rcc_clocks.PCLK1_Frequency, I2C_InitStruct->ClockSpeed, I2C_InitStruct->DutyCycle); | |
/*---------------------------- I2Cx OAR1 Configuration ----------------------- | |
* Disable, Configure and Enable I2Cx device own address 1 with parameters : | |
* - OwnAddress1: I2C_OAR1_ADD[9:8], I2C_OAR1_ADD[7:1] and I2C_OAR1_ADD0 bits | |
* - OwnAddrSize: I2C_OAR1_ADDMODE bit | |
*/ | |
LL_I2C_SetOwnAddress1(I2Cx, I2C_InitStruct->OwnAddress1, I2C_InitStruct->OwnAddrSize); | |
/*---------------------------- I2Cx MODE Configuration ----------------------- | |
* Configure I2Cx peripheral mode with parameter : | |
* - PeripheralMode: I2C_CR1_SMBUS, I2C_CR1_SMBTYPE and I2C_CR1_ENARP bits | |
*/ | |
LL_I2C_SetMode(I2Cx, I2C_InitStruct->PeripheralMode); | |
/* Enable the selected I2Cx Peripheral */ | |
LL_I2C_Enable(I2Cx); | |
/*---------------------------- 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->ClockSpeed = 5000U; | |
I2C_InitStruct->DutyCycle = LL_I2C_DUTYCYCLE_2; | |
#if defined(I2C_FLTR_ANOFF)&&defined(I2C_FLTR_DNF) | |
I2C_InitStruct->AnalogFilter = LL_I2C_ANALOGFILTER_ENABLE; | |
I2C_InitStruct->DigitalFilter = 0U; | |
#endif | |
I2C_InitStruct->OwnAddress1 = 0U; | |
I2C_InitStruct->TypeAcknowledge = LL_I2C_NACK; | |
I2C_InitStruct->OwnAddrSize = LL_I2C_OWNADDRESS1_7BIT; | |
} | |
/** | |
* @} | |
*/ | |
/** | |
* @} | |
*/ | |
/** | |
* @} | |
*/ | |
#endif /* I2C1 || I2C2 || I2C3 */ | |
/** | |
* @} | |
*/ | |
#endif /* USE_FULL_LL_DRIVER */ | |
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ |