240 lines
8.4 KiB
C
240 lines
8.4 KiB
C
|
/**
|
||
|
|
******************************************************************************
|
||
|
|
* @file stm32f1xx_ll_i2c.c
|
||
|
|
* @author MCD Application Team
|
||
|
|
* @version V1.1.1
|
||
|
|
* @date 12-May-2017
|
||
|
|
* @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 "stm32f1xx_ll_i2c.h"
|
||
|
|
#include "stm32f1xx_ll_bus.h"
|
||
|
|
#include "stm32f1xx_ll_rcc.h"
|
||
|
|
#ifdef USE_FULL_ASSERT
|
||
|
|
#include "stm32_assert.h"
|
||
|
|
#else
|
||
|
|
#define assert_param(expr) ((void)0U)
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/** @addtogroup STM32F1xx_LL_Driver
|
||
|
|
* @{
|
||
|
|
*/
|
||
|
|
|
||
|
|
#if defined (I2C1) || defined (I2C2)
|
||
|
|
|
||
|
|
/** @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))
|
||
|
|
|
||
|
|
#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);
|
||
|
|
}
|
||
|
|
#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 /* I2C2 */
|
||
|
|
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));
|
||
|
|
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);
|
||
|
|
|
||
|
|
/*---------------------------- 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;
|
||
|
|
I2C_InitStruct->OwnAddress1 = 0U;
|
||
|
|
I2C_InitStruct->TypeAcknowledge = LL_I2C_NACK;
|
||
|
|
I2C_InitStruct->OwnAddrSize = LL_I2C_OWNADDRESS1_7BIT;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @}
|
||
|
|
*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @}
|
||
|
|
*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @}
|
||
|
|
*/
|
||
|
|
|
||
|
|
#endif /* I2C1 || I2C2 */
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @}
|
||
|
|
*/
|
||
|
|
|
||
|
|
#endif /* USE_FULL_LL_DRIVER */
|
||
|
|
|
||
|
|
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
|