546 lines
21 KiB
C
546 lines
21 KiB
C
|
/**
|
||
|
|
******************************************************************************
|
||
|
|
* @file stm32f0xx_ll_spi.c
|
||
|
|
* @author MCD Application Team
|
||
|
|
* @brief SPI 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 "stm32f0xx_ll_spi.h"
|
||
|
|
#include "stm32f0xx_ll_bus.h"
|
||
|
|
#include "stm32f0xx_ll_rcc.h"
|
||
|
|
|
||
|
|
#ifdef USE_FULL_ASSERT
|
||
|
|
#include "stm32_assert.h"
|
||
|
|
#else
|
||
|
|
#define assert_param(expr) ((void)0U)
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/** @addtogroup STM32F0xx_LL_Driver
|
||
|
|
* @{
|
||
|
|
*/
|
||
|
|
|
||
|
|
#if defined (SPI1) || defined (SPI2)
|
||
|
|
|
||
|
|
/** @addtogroup SPI_LL
|
||
|
|
* @{
|
||
|
|
*/
|
||
|
|
|
||
|
|
/* Private types -------------------------------------------------------------*/
|
||
|
|
/* Private variables ---------------------------------------------------------*/
|
||
|
|
|
||
|
|
/* Private constants ---------------------------------------------------------*/
|
||
|
|
/** @defgroup SPI_LL_Private_Constants SPI Private Constants
|
||
|
|
* @{
|
||
|
|
*/
|
||
|
|
/* SPI registers Masks */
|
||
|
|
#define SPI_CR1_CLEAR_MASK (SPI_CR1_CPHA | SPI_CR1_CPOL | SPI_CR1_MSTR | \
|
||
|
|
SPI_CR1_BR | SPI_CR1_LSBFIRST | SPI_CR1_SSI | \
|
||
|
|
SPI_CR1_SSM | SPI_CR1_RXONLY | SPI_CR1_CRCL | \
|
||
|
|
SPI_CR1_CRCNEXT | SPI_CR1_CRCEN | SPI_CR1_BIDIOE | \
|
||
|
|
SPI_CR1_BIDIMODE)
|
||
|
|
/**
|
||
|
|
* @}
|
||
|
|
*/
|
||
|
|
|
||
|
|
/* Private macros ------------------------------------------------------------*/
|
||
|
|
/** @defgroup SPI_LL_Private_Macros SPI Private Macros
|
||
|
|
* @{
|
||
|
|
*/
|
||
|
|
#define IS_LL_SPI_TRANSFER_DIRECTION(__VALUE__) (((__VALUE__) == LL_SPI_FULL_DUPLEX) \
|
||
|
|
|| ((__VALUE__) == LL_SPI_SIMPLEX_RX) \
|
||
|
|
|| ((__VALUE__) == LL_SPI_HALF_DUPLEX_RX) \
|
||
|
|
|| ((__VALUE__) == LL_SPI_HALF_DUPLEX_TX))
|
||
|
|
|
||
|
|
#define IS_LL_SPI_MODE(__VALUE__) (((__VALUE__) == LL_SPI_MODE_MASTER) \
|
||
|
|
|| ((__VALUE__) == LL_SPI_MODE_SLAVE))
|
||
|
|
|
||
|
|
#define IS_LL_SPI_DATAWIDTH(__VALUE__) (((__VALUE__) == LL_SPI_DATAWIDTH_4BIT) \
|
||
|
|
|| ((__VALUE__) == LL_SPI_DATAWIDTH_5BIT) \
|
||
|
|
|| ((__VALUE__) == LL_SPI_DATAWIDTH_6BIT) \
|
||
|
|
|| ((__VALUE__) == LL_SPI_DATAWIDTH_7BIT) \
|
||
|
|
|| ((__VALUE__) == LL_SPI_DATAWIDTH_8BIT) \
|
||
|
|
|| ((__VALUE__) == LL_SPI_DATAWIDTH_9BIT) \
|
||
|
|
|| ((__VALUE__) == LL_SPI_DATAWIDTH_10BIT) \
|
||
|
|
|| ((__VALUE__) == LL_SPI_DATAWIDTH_11BIT) \
|
||
|
|
|| ((__VALUE__) == LL_SPI_DATAWIDTH_12BIT) \
|
||
|
|
|| ((__VALUE__) == LL_SPI_DATAWIDTH_13BIT) \
|
||
|
|
|| ((__VALUE__) == LL_SPI_DATAWIDTH_14BIT) \
|
||
|
|
|| ((__VALUE__) == LL_SPI_DATAWIDTH_15BIT) \
|
||
|
|
|| ((__VALUE__) == LL_SPI_DATAWIDTH_16BIT))
|
||
|
|
|
||
|
|
#define IS_LL_SPI_POLARITY(__VALUE__) (((__VALUE__) == LL_SPI_POLARITY_LOW) \
|
||
|
|
|| ((__VALUE__) == LL_SPI_POLARITY_HIGH))
|
||
|
|
|
||
|
|
#define IS_LL_SPI_PHASE(__VALUE__) (((__VALUE__) == LL_SPI_PHASE_1EDGE) \
|
||
|
|
|| ((__VALUE__) == LL_SPI_PHASE_2EDGE))
|
||
|
|
|
||
|
|
#define IS_LL_SPI_NSS(__VALUE__) (((__VALUE__) == LL_SPI_NSS_SOFT) \
|
||
|
|
|| ((__VALUE__) == LL_SPI_NSS_HARD_INPUT) \
|
||
|
|
|| ((__VALUE__) == LL_SPI_NSS_HARD_OUTPUT))
|
||
|
|
|
||
|
|
#define IS_LL_SPI_BAUDRATE(__VALUE__) (((__VALUE__) == LL_SPI_BAUDRATEPRESCALER_DIV2) \
|
||
|
|
|| ((__VALUE__) == LL_SPI_BAUDRATEPRESCALER_DIV4) \
|
||
|
|
|| ((__VALUE__) == LL_SPI_BAUDRATEPRESCALER_DIV8) \
|
||
|
|
|| ((__VALUE__) == LL_SPI_BAUDRATEPRESCALER_DIV16) \
|
||
|
|
|| ((__VALUE__) == LL_SPI_BAUDRATEPRESCALER_DIV32) \
|
||
|
|
|| ((__VALUE__) == LL_SPI_BAUDRATEPRESCALER_DIV64) \
|
||
|
|
|| ((__VALUE__) == LL_SPI_BAUDRATEPRESCALER_DIV128) \
|
||
|
|
|| ((__VALUE__) == LL_SPI_BAUDRATEPRESCALER_DIV256))
|
||
|
|
|
||
|
|
#define IS_LL_SPI_BITORDER(__VALUE__) (((__VALUE__) == LL_SPI_LSB_FIRST) \
|
||
|
|
|| ((__VALUE__) == LL_SPI_MSB_FIRST))
|
||
|
|
|
||
|
|
#define IS_LL_SPI_CRCCALCULATION(__VALUE__) (((__VALUE__) == LL_SPI_CRCCALCULATION_ENABLE) \
|
||
|
|
|| ((__VALUE__) == LL_SPI_CRCCALCULATION_DISABLE))
|
||
|
|
|
||
|
|
#define IS_LL_SPI_CRC_POLYNOMIAL(__VALUE__) ((__VALUE__) >= 0x1U)
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @}
|
||
|
|
*/
|
||
|
|
|
||
|
|
/* Private function prototypes -----------------------------------------------*/
|
||
|
|
|
||
|
|
/* Exported functions --------------------------------------------------------*/
|
||
|
|
/** @addtogroup SPI_LL_Exported_Functions
|
||
|
|
* @{
|
||
|
|
*/
|
||
|
|
|
||
|
|
/** @addtogroup SPI_LL_EF_Init
|
||
|
|
* @{
|
||
|
|
*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief De-initialize the SPI registers to their default reset values.
|
||
|
|
* @param SPIx SPI Instance
|
||
|
|
* @retval An ErrorStatus enumeration value:
|
||
|
|
* - SUCCESS: SPI registers are de-initialized
|
||
|
|
* - ERROR: SPI registers are not de-initialized
|
||
|
|
*/
|
||
|
|
ErrorStatus LL_SPI_DeInit(SPI_TypeDef *SPIx)
|
||
|
|
{
|
||
|
|
ErrorStatus status = ERROR;
|
||
|
|
|
||
|
|
/* Check the parameters */
|
||
|
|
assert_param(IS_SPI_ALL_INSTANCE(SPIx));
|
||
|
|
|
||
|
|
#if defined(SPI1)
|
||
|
|
if (SPIx == SPI1)
|
||
|
|
{
|
||
|
|
/* Force reset of SPI clock */
|
||
|
|
LL_APB1_GRP2_ForceReset(LL_APB1_GRP2_PERIPH_SPI1);
|
||
|
|
|
||
|
|
/* Release reset of SPI clock */
|
||
|
|
LL_APB1_GRP2_ReleaseReset(LL_APB1_GRP2_PERIPH_SPI1);
|
||
|
|
|
||
|
|
status = SUCCESS;
|
||
|
|
}
|
||
|
|
#endif /* SPI1 */
|
||
|
|
#if defined(SPI2)
|
||
|
|
if (SPIx == SPI2)
|
||
|
|
{
|
||
|
|
/* Force reset of SPI clock */
|
||
|
|
LL_APB1_GRP1_ForceReset(LL_APB1_GRP1_PERIPH_SPI2);
|
||
|
|
|
||
|
|
/* Release reset of SPI clock */
|
||
|
|
LL_APB1_GRP1_ReleaseReset(LL_APB1_GRP1_PERIPH_SPI2);
|
||
|
|
|
||
|
|
status = SUCCESS;
|
||
|
|
}
|
||
|
|
#endif /* SPI2 */
|
||
|
|
|
||
|
|
return status;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Initialize the SPI registers according to the specified parameters in SPI_InitStruct.
|
||
|
|
* @note As some bits in SPI configuration registers can only be written when the SPI is disabled (SPI_CR1_SPE bit =0),
|
||
|
|
* SPI IP should be in disabled state prior calling this function. Otherwise, ERROR result will be returned.
|
||
|
|
* @param SPIx SPI Instance
|
||
|
|
* @param SPI_InitStruct pointer to a @ref LL_SPI_InitTypeDef structure
|
||
|
|
* @retval An ErrorStatus enumeration value. (Return always SUCCESS)
|
||
|
|
*/
|
||
|
|
ErrorStatus LL_SPI_Init(SPI_TypeDef *SPIx, LL_SPI_InitTypeDef *SPI_InitStruct)
|
||
|
|
{
|
||
|
|
ErrorStatus status = ERROR;
|
||
|
|
|
||
|
|
/* Check the SPI Instance SPIx*/
|
||
|
|
assert_param(IS_SPI_ALL_INSTANCE(SPIx));
|
||
|
|
|
||
|
|
/* Check the SPI parameters from SPI_InitStruct*/
|
||
|
|
assert_param(IS_LL_SPI_TRANSFER_DIRECTION(SPI_InitStruct->TransferDirection));
|
||
|
|
assert_param(IS_LL_SPI_MODE(SPI_InitStruct->Mode));
|
||
|
|
assert_param(IS_LL_SPI_DATAWIDTH(SPI_InitStruct->DataWidth));
|
||
|
|
assert_param(IS_LL_SPI_POLARITY(SPI_InitStruct->ClockPolarity));
|
||
|
|
assert_param(IS_LL_SPI_PHASE(SPI_InitStruct->ClockPhase));
|
||
|
|
assert_param(IS_LL_SPI_NSS(SPI_InitStruct->NSS));
|
||
|
|
assert_param(IS_LL_SPI_BAUDRATE(SPI_InitStruct->BaudRate));
|
||
|
|
assert_param(IS_LL_SPI_BITORDER(SPI_InitStruct->BitOrder));
|
||
|
|
assert_param(IS_LL_SPI_CRCCALCULATION(SPI_InitStruct->CRCCalculation));
|
||
|
|
|
||
|
|
if (LL_SPI_IsEnabled(SPIx) == 0x00000000U)
|
||
|
|
{
|
||
|
|
/*---------------------------- SPIx CR1 Configuration ------------------------
|
||
|
|
* Configure SPIx CR1 with parameters:
|
||
|
|
* - TransferDirection: SPI_CR1_BIDIMODE, SPI_CR1_BIDIOE and SPI_CR1_RXONLY bits
|
||
|
|
* - Master/Slave Mode: SPI_CR1_MSTR bit
|
||
|
|
* - ClockPolarity: SPI_CR1_CPOL bit
|
||
|
|
* - ClockPhase: SPI_CR1_CPHA bit
|
||
|
|
* - NSS management: SPI_CR1_SSM bit
|
||
|
|
* - BaudRate prescaler: SPI_CR1_BR[2:0] bits
|
||
|
|
* - BitOrder: SPI_CR1_LSBFIRST bit
|
||
|
|
* - CRCCalculation: SPI_CR1_CRCEN bit
|
||
|
|
*/
|
||
|
|
MODIFY_REG(SPIx->CR1,
|
||
|
|
SPI_CR1_CLEAR_MASK,
|
||
|
|
SPI_InitStruct->TransferDirection | SPI_InitStruct->Mode |
|
||
|
|
SPI_InitStruct->ClockPolarity | SPI_InitStruct->ClockPhase |
|
||
|
|
SPI_InitStruct->NSS | SPI_InitStruct->BaudRate |
|
||
|
|
SPI_InitStruct->BitOrder | SPI_InitStruct->CRCCalculation);
|
||
|
|
|
||
|
|
/*---------------------------- SPIx CR2 Configuration ------------------------
|
||
|
|
* Configure SPIx CR2 with parameters:
|
||
|
|
* - DataWidth: DS[3:0] bits
|
||
|
|
* - NSS management: SSOE bit
|
||
|
|
*/
|
||
|
|
MODIFY_REG(SPIx->CR2,
|
||
|
|
SPI_CR2_DS | SPI_CR2_SSOE,
|
||
|
|
SPI_InitStruct->DataWidth | (SPI_InitStruct->NSS >> 16U));
|
||
|
|
|
||
|
|
/*---------------------------- SPIx CRCPR Configuration ----------------------
|
||
|
|
* Configure SPIx CRCPR with parameters:
|
||
|
|
* - CRCPoly: CRCPOLY[15:0] bits
|
||
|
|
*/
|
||
|
|
if (SPI_InitStruct->CRCCalculation == LL_SPI_CRCCALCULATION_ENABLE)
|
||
|
|
{
|
||
|
|
assert_param(IS_LL_SPI_CRC_POLYNOMIAL(SPI_InitStruct->CRCPoly));
|
||
|
|
LL_SPI_SetCRCPolynomial(SPIx, SPI_InitStruct->CRCPoly);
|
||
|
|
}
|
||
|
|
status = SUCCESS;
|
||
|
|
}
|
||
|
|
|
||
|
|
#if defined (SPI_I2S_SUPPORT)
|
||
|
|
/* Activate the SPI mode (Reset I2SMOD bit in I2SCFGR register) */
|
||
|
|
CLEAR_BIT(SPIx->I2SCFGR, SPI_I2SCFGR_I2SMOD);
|
||
|
|
#endif /* SPI_I2S_SUPPORT */
|
||
|
|
return status;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Set each @ref LL_SPI_InitTypeDef field to default value.
|
||
|
|
* @param SPI_InitStruct pointer to a @ref LL_SPI_InitTypeDef structure
|
||
|
|
* whose fields will be set to default values.
|
||
|
|
* @retval None
|
||
|
|
*/
|
||
|
|
void LL_SPI_StructInit(LL_SPI_InitTypeDef *SPI_InitStruct)
|
||
|
|
{
|
||
|
|
/* Set SPI_InitStruct fields to default values */
|
||
|
|
SPI_InitStruct->TransferDirection = LL_SPI_FULL_DUPLEX;
|
||
|
|
SPI_InitStruct->Mode = LL_SPI_MODE_SLAVE;
|
||
|
|
SPI_InitStruct->DataWidth = LL_SPI_DATAWIDTH_8BIT;
|
||
|
|
SPI_InitStruct->ClockPolarity = LL_SPI_POLARITY_LOW;
|
||
|
|
SPI_InitStruct->ClockPhase = LL_SPI_PHASE_1EDGE;
|
||
|
|
SPI_InitStruct->NSS = LL_SPI_NSS_HARD_INPUT;
|
||
|
|
SPI_InitStruct->BaudRate = LL_SPI_BAUDRATEPRESCALER_DIV2;
|
||
|
|
SPI_InitStruct->BitOrder = LL_SPI_MSB_FIRST;
|
||
|
|
SPI_InitStruct->CRCCalculation = LL_SPI_CRCCALCULATION_DISABLE;
|
||
|
|
SPI_InitStruct->CRCPoly = 7U;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @}
|
||
|
|
*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @}
|
||
|
|
*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @}
|
||
|
|
*/
|
||
|
|
|
||
|
|
#if defined(SPI_I2S_SUPPORT)
|
||
|
|
/** @addtogroup I2S_LL
|
||
|
|
* @{
|
||
|
|
*/
|
||
|
|
|
||
|
|
/* Private types -------------------------------------------------------------*/
|
||
|
|
/* Private variables ---------------------------------------------------------*/
|
||
|
|
/* Private constants ---------------------------------------------------------*/
|
||
|
|
/** @defgroup I2S_LL_Private_Constants I2S Private Constants
|
||
|
|
* @{
|
||
|
|
*/
|
||
|
|
/* I2S registers Masks */
|
||
|
|
#define I2S_I2SCFGR_CLEAR_MASK (SPI_I2SCFGR_CHLEN | SPI_I2SCFGR_DATLEN | \
|
||
|
|
SPI_I2SCFGR_CKPOL | SPI_I2SCFGR_I2SSTD | \
|
||
|
|
SPI_I2SCFGR_I2SCFG | SPI_I2SCFGR_I2SMOD )
|
||
|
|
|
||
|
|
#define I2S_I2SPR_CLEAR_MASK 0x0002U
|
||
|
|
/**
|
||
|
|
* @}
|
||
|
|
*/
|
||
|
|
/* Private macros ------------------------------------------------------------*/
|
||
|
|
/** @defgroup I2S_LL_Private_Macros I2S Private Macros
|
||
|
|
* @{
|
||
|
|
*/
|
||
|
|
|
||
|
|
#define IS_LL_I2S_DATAFORMAT(__VALUE__) (((__VALUE__) == LL_I2S_DATAFORMAT_16B) \
|
||
|
|
|| ((__VALUE__) == LL_I2S_DATAFORMAT_16B_EXTENDED) \
|
||
|
|
|| ((__VALUE__) == LL_I2S_DATAFORMAT_24B) \
|
||
|
|
|| ((__VALUE__) == LL_I2S_DATAFORMAT_32B))
|
||
|
|
|
||
|
|
#define IS_LL_I2S_CPOL(__VALUE__) (((__VALUE__) == LL_I2S_POLARITY_LOW) \
|
||
|
|
|| ((__VALUE__) == LL_I2S_POLARITY_HIGH))
|
||
|
|
|
||
|
|
#define IS_LL_I2S_STANDARD(__VALUE__) (((__VALUE__) == LL_I2S_STANDARD_PHILIPS) \
|
||
|
|
|| ((__VALUE__) == LL_I2S_STANDARD_MSB) \
|
||
|
|
|| ((__VALUE__) == LL_I2S_STANDARD_LSB) \
|
||
|
|
|| ((__VALUE__) == LL_I2S_STANDARD_PCM_SHORT) \
|
||
|
|
|| ((__VALUE__) == LL_I2S_STANDARD_PCM_LONG))
|
||
|
|
|
||
|
|
#define IS_LL_I2S_MODE(__VALUE__) (((__VALUE__) == LL_I2S_MODE_SLAVE_TX) \
|
||
|
|
|| ((__VALUE__) == LL_I2S_MODE_SLAVE_RX) \
|
||
|
|
|| ((__VALUE__) == LL_I2S_MODE_MASTER_TX) \
|
||
|
|
|| ((__VALUE__) == LL_I2S_MODE_MASTER_RX))
|
||
|
|
|
||
|
|
#define IS_LL_I2S_MCLK_OUTPUT(__VALUE__) (((__VALUE__) == LL_I2S_MCLK_OUTPUT_ENABLE) \
|
||
|
|
|| ((__VALUE__) == LL_I2S_MCLK_OUTPUT_DISABLE))
|
||
|
|
|
||
|
|
#define IS_LL_I2S_AUDIO_FREQ(__VALUE__) ((((__VALUE__) >= LL_I2S_AUDIOFREQ_8K) \
|
||
|
|
&& ((__VALUE__) <= LL_I2S_AUDIOFREQ_192K)) \
|
||
|
|
|| ((__VALUE__) == LL_I2S_AUDIOFREQ_DEFAULT))
|
||
|
|
|
||
|
|
#define IS_LL_I2S_PRESCALER_LINEAR(__VALUE__) ((__VALUE__) >= 0x2U)
|
||
|
|
|
||
|
|
#define IS_LL_I2S_PRESCALER_PARITY(__VALUE__) (((__VALUE__) == LL_I2S_PRESCALER_PARITY_EVEN) \
|
||
|
|
|| ((__VALUE__) == LL_I2S_PRESCALER_PARITY_ODD))
|
||
|
|
/**
|
||
|
|
* @}
|
||
|
|
*/
|
||
|
|
|
||
|
|
/* Private function prototypes -----------------------------------------------*/
|
||
|
|
|
||
|
|
/* Exported functions --------------------------------------------------------*/
|
||
|
|
/** @addtogroup I2S_LL_Exported_Functions
|
||
|
|
* @{
|
||
|
|
*/
|
||
|
|
|
||
|
|
/** @addtogroup I2S_LL_EF_Init
|
||
|
|
* @{
|
||
|
|
*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief De-initialize the SPI/I2S registers to their default reset values.
|
||
|
|
* @param SPIx SPI Instance
|
||
|
|
* @retval An ErrorStatus enumeration value:
|
||
|
|
* - SUCCESS: SPI registers are de-initialized
|
||
|
|
* - ERROR: SPI registers are not de-initialized
|
||
|
|
*/
|
||
|
|
ErrorStatus LL_I2S_DeInit(SPI_TypeDef *SPIx)
|
||
|
|
{
|
||
|
|
return LL_SPI_DeInit(SPIx);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Initializes the SPI/I2S registers according to the specified parameters in I2S_InitStruct.
|
||
|
|
* @note As some bits in SPI configuration registers can only be written when the SPI is disabled (SPI_CR1_SPE bit =0),
|
||
|
|
* SPI IP should be in disabled state prior calling this function. Otherwise, ERROR result will be returned.
|
||
|
|
* @param SPIx SPI Instance
|
||
|
|
* @param I2S_InitStruct pointer to a @ref LL_I2S_InitTypeDef structure
|
||
|
|
* @retval An ErrorStatus enumeration value:
|
||
|
|
* - SUCCESS: SPI registers are Initialized
|
||
|
|
* - ERROR: SPI registers are not Initialized
|
||
|
|
*/
|
||
|
|
ErrorStatus LL_I2S_Init(SPI_TypeDef *SPIx, LL_I2S_InitTypeDef *I2S_InitStruct)
|
||
|
|
{
|
||
|
|
uint16_t i2sdiv = 2U, i2sodd = 0U, packetlength = 1U;
|
||
|
|
uint32_t tmp = 0U;
|
||
|
|
LL_RCC_ClocksTypeDef rcc_clocks;
|
||
|
|
uint32_t sourceclock = 0U;
|
||
|
|
ErrorStatus status = ERROR;
|
||
|
|
|
||
|
|
/* Check the I2S parameters */
|
||
|
|
assert_param(IS_I2S_ALL_INSTANCE(SPIx));
|
||
|
|
assert_param(IS_LL_I2S_MODE(I2S_InitStruct->Mode));
|
||
|
|
assert_param(IS_LL_I2S_STANDARD(I2S_InitStruct->Standard));
|
||
|
|
assert_param(IS_LL_I2S_DATAFORMAT(I2S_InitStruct->DataFormat));
|
||
|
|
assert_param(IS_LL_I2S_MCLK_OUTPUT(I2S_InitStruct->MCLKOutput));
|
||
|
|
assert_param(IS_LL_I2S_AUDIO_FREQ(I2S_InitStruct->AudioFreq));
|
||
|
|
assert_param(IS_LL_I2S_CPOL(I2S_InitStruct->ClockPolarity));
|
||
|
|
|
||
|
|
if (LL_I2S_IsEnabled(SPIx) == 0x00000000U)
|
||
|
|
{
|
||
|
|
/*---------------------------- SPIx I2SCFGR Configuration --------------------
|
||
|
|
* Configure SPIx I2SCFGR with parameters:
|
||
|
|
* - Mode: SPI_I2SCFGR_I2SCFG[1:0] bit
|
||
|
|
* - Standard: SPI_I2SCFGR_I2SSTD[1:0] and SPI_I2SCFGR_PCMSYNC bits
|
||
|
|
* - DataFormat: SPI_I2SCFGR_CHLEN and SPI_I2SCFGR_DATLEN bits
|
||
|
|
* - ClockPolarity: SPI_I2SCFGR_CKPOL bit
|
||
|
|
*/
|
||
|
|
|
||
|
|
/* Write to SPIx I2SCFGR */
|
||
|
|
MODIFY_REG(SPIx->I2SCFGR,
|
||
|
|
I2S_I2SCFGR_CLEAR_MASK,
|
||
|
|
I2S_InitStruct->Mode | I2S_InitStruct->Standard |
|
||
|
|
I2S_InitStruct->DataFormat | I2S_InitStruct->ClockPolarity |
|
||
|
|
SPI_I2SCFGR_I2SMOD);
|
||
|
|
|
||
|
|
/*---------------------------- SPIx I2SPR Configuration ----------------------
|
||
|
|
* Configure SPIx I2SPR with parameters:
|
||
|
|
* - MCLKOutput: SPI_I2SPR_MCKOE bit
|
||
|
|
* - AudioFreq: SPI_I2SPR_I2SDIV[7:0] and SPI_I2SPR_ODD bits
|
||
|
|
*/
|
||
|
|
|
||
|
|
/* If the requested audio frequency is not the default, compute the prescaler (i2sodd, i2sdiv)
|
||
|
|
* else, default values are used: i2sodd = 0U, i2sdiv = 2U.
|
||
|
|
*/
|
||
|
|
if (I2S_InitStruct->AudioFreq != LL_I2S_AUDIOFREQ_DEFAULT)
|
||
|
|
{
|
||
|
|
/* Check the frame length (For the Prescaler computing)
|
||
|
|
* Default value: LL_I2S_DATAFORMAT_16B (packetlength = 1U).
|
||
|
|
*/
|
||
|
|
if (I2S_InitStruct->DataFormat != LL_I2S_DATAFORMAT_16B)
|
||
|
|
{
|
||
|
|
/* Packet length is 32 bits */
|
||
|
|
packetlength = 2U;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* I2S Clock source is System clock: Get System Clock frequency */
|
||
|
|
LL_RCC_GetSystemClocksFreq(&rcc_clocks);
|
||
|
|
|
||
|
|
/* Get the source clock value: based on System Clock value */
|
||
|
|
sourceclock = rcc_clocks.SYSCLK_Frequency;
|
||
|
|
|
||
|
|
/* Compute the Real divider depending on the MCLK output state with a floating point */
|
||
|
|
if (I2S_InitStruct->MCLKOutput == LL_I2S_MCLK_OUTPUT_ENABLE)
|
||
|
|
{
|
||
|
|
/* MCLK output is enabled */
|
||
|
|
tmp = (uint16_t)(((((sourceclock / 256U) * 10U) / I2S_InitStruct->AudioFreq)) + 5U);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
/* MCLK output is disabled */
|
||
|
|
tmp = (uint16_t)(((((sourceclock / (32U * packetlength)) * 10U) / I2S_InitStruct->AudioFreq)) + 5U);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Remove the floating point */
|
||
|
|
tmp = tmp / 10U;
|
||
|
|
|
||
|
|
/* Check the parity of the divider */
|
||
|
|
i2sodd = (uint16_t)(tmp & (uint16_t)0x0001U);
|
||
|
|
|
||
|
|
/* Compute the i2sdiv prescaler */
|
||
|
|
i2sdiv = (uint16_t)((tmp - i2sodd) / 2U);
|
||
|
|
|
||
|
|
/* Get the Mask for the Odd bit (SPI_I2SPR[8]) register */
|
||
|
|
i2sodd = (uint16_t)(i2sodd << 8U);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Test if the divider is 1 or 0 or greater than 0xFF */
|
||
|
|
if ((i2sdiv < 2U) || (i2sdiv > 0xFFU))
|
||
|
|
{
|
||
|
|
/* Set the default values */
|
||
|
|
i2sdiv = 2U;
|
||
|
|
i2sodd = 0U;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Write to SPIx I2SPR register the computed value */
|
||
|
|
WRITE_REG(SPIx->I2SPR, i2sdiv | i2sodd | I2S_InitStruct->MCLKOutput);
|
||
|
|
|
||
|
|
status = SUCCESS;
|
||
|
|
}
|
||
|
|
return status;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Set each @ref LL_I2S_InitTypeDef field to default value.
|
||
|
|
* @param I2S_InitStruct pointer to a @ref LL_I2S_InitTypeDef structure
|
||
|
|
* whose fields will be set to default values.
|
||
|
|
* @retval None
|
||
|
|
*/
|
||
|
|
void LL_I2S_StructInit(LL_I2S_InitTypeDef *I2S_InitStruct)
|
||
|
|
{
|
||
|
|
/*--------------- Reset I2S init structure parameters values -----------------*/
|
||
|
|
I2S_InitStruct->Mode = LL_I2S_MODE_SLAVE_TX;
|
||
|
|
I2S_InitStruct->Standard = LL_I2S_STANDARD_PHILIPS;
|
||
|
|
I2S_InitStruct->DataFormat = LL_I2S_DATAFORMAT_16B;
|
||
|
|
I2S_InitStruct->MCLKOutput = LL_I2S_MCLK_OUTPUT_DISABLE;
|
||
|
|
I2S_InitStruct->AudioFreq = LL_I2S_AUDIOFREQ_DEFAULT;
|
||
|
|
I2S_InitStruct->ClockPolarity = LL_I2S_POLARITY_LOW;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Set linear and parity prescaler.
|
||
|
|
* @note To calculate value of PrescalerLinear(I2SDIV[7:0] bits) and PrescalerParity(ODD bit)\n
|
||
|
|
* Check Audio frequency table and formulas inside Reference Manual (SPI/I2S).
|
||
|
|
* @param SPIx SPI Instance
|
||
|
|
* @param PrescalerLinear value: Min_Data=0x02 and Max_Data=0xFF.
|
||
|
|
* @param PrescalerParity This parameter can be one of the following values:
|
||
|
|
* @arg @ref LL_I2S_PRESCALER_PARITY_EVEN
|
||
|
|
* @arg @ref LL_I2S_PRESCALER_PARITY_ODD
|
||
|
|
* @retval None
|
||
|
|
*/
|
||
|
|
void LL_I2S_ConfigPrescaler(SPI_TypeDef *SPIx, uint32_t PrescalerLinear, uint32_t PrescalerParity)
|
||
|
|
{
|
||
|
|
/* Check the I2S parameters */
|
||
|
|
assert_param(IS_I2S_ALL_INSTANCE(SPIx));
|
||
|
|
assert_param(IS_LL_I2S_PRESCALER_LINEAR(PrescalerLinear));
|
||
|
|
assert_param(IS_LL_I2S_PRESCALER_PARITY(PrescalerParity));
|
||
|
|
|
||
|
|
/* Write to SPIx I2SPR */
|
||
|
|
MODIFY_REG(SPIx->I2SPR, SPI_I2SPR_I2SDIV | SPI_I2SPR_ODD, PrescalerLinear | (PrescalerParity << 8U));
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @}
|
||
|
|
*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @}
|
||
|
|
*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @}
|
||
|
|
*/
|
||
|
|
#endif /* SPI_I2S_SUPPORT */
|
||
|
|
|
||
|
|
#endif /* defined (SPI1) || defined (SPI2) */
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @}
|
||
|
|
*/
|
||
|
|
|
||
|
|
#endif /* USE_FULL_LL_DRIVER */
|
||
|
|
|
||
|
|
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
|