--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Common/Drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_ll_spi.c	Thu Mar 07 15:06:43 2019 +0100
@@ -0,0 +1,640 @@
+/**
+  ******************************************************************************
+  * @file    stm32f4xx_ll_spi.c
+  * @author  MCD Application Team
+  * @brief   SPI LL module driver.
+  ******************************************************************************
+  * @attention
+  *
+  * <h2><center>&copy; 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_spi.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 (SPI1) || defined (SPI2) || defined (SPI3) || defined (SPI4) || defined (SPI5) || defined(SPI6)
+
+/** @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_DFF    | \
+                                            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_8BIT)  \
+                                     || ((__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_APB2_GRP1_ForceReset(LL_APB2_GRP1_PERIPH_SPI1);
+
+    /* Release reset of SPI clock */
+    LL_APB2_GRP1_ReleaseReset(LL_APB2_GRP1_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 */
+#if defined(SPI3)
+  if (SPIx == SPI3)
+  {
+    /* Force reset of SPI clock */
+    LL_APB1_GRP1_ForceReset(LL_APB1_GRP1_PERIPH_SPI3);
+
+    /* Release reset of SPI clock */
+    LL_APB1_GRP1_ReleaseReset(LL_APB1_GRP1_PERIPH_SPI3);
+
+    status = SUCCESS;
+  }
+#endif /* SPI3 */
+#if defined(SPI4)
+  if (SPIx == SPI4)
+  {
+    /* Force reset of SPI clock */
+    LL_APB2_GRP1_ForceReset(LL_APB2_GRP1_PERIPH_SPI4);
+
+    /* Release reset of SPI clock */
+    LL_APB2_GRP1_ReleaseReset(LL_APB2_GRP1_PERIPH_SPI4);
+
+    status = SUCCESS;
+  }
+#endif /* SPI4 */
+#if defined(SPI5)
+  if (SPIx == SPI5)
+  {
+    /* Force reset of SPI clock */
+    LL_APB2_GRP1_ForceReset(LL_APB2_GRP1_PERIPH_SPI5);
+
+    /* Release reset of SPI clock */
+    LL_APB2_GRP1_ReleaseReset(LL_APB2_GRP1_PERIPH_SPI5);
+
+    status = SUCCESS;
+  }
+#endif /* SPI5 */
+#if defined(SPI6)
+  if (SPIx == SPI6)
+  {
+    /* Force reset of SPI clock */
+    LL_APB2_GRP1_ForceReset(LL_APB2_GRP1_PERIPH_SPI6);
+
+    /* Release reset of SPI clock */
+    LL_APB2_GRP1_ReleaseReset(LL_APB2_GRP1_PERIPH_SPI6);
+
+    status = SUCCESS;
+  }
+#endif /* SPI6 */
+
+  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
+     * - DataWidth:          SPI_CR1_DFF 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->DataWidth |
+               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:
+     * - NSS management:     SSOE bit
+     */
+    MODIFY_REG(SPIx->CR2, SPI_CR2_SSOE, (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;
+  }
+
+  /* Activate the SPI mode (Reset I2SMOD bit in I2SCFGR register) */
+  CLEAR_BIT(SPIx->I2SCFGR, SPI_I2SCFGR_I2SMOD);
+  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;
+}
+
+/**
+  * @}
+  */
+
+/**
+  * @}
+  */
+
+/**
+  * @}
+  */
+
+/** @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;
+  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;
+      }
+
+      /* If an external I2S clock has to be used, the specific define should be set
+      in the project configuration or in the stm32f4xx_ll_rcc.h file */
+      /* Get the I2S source clock value */
+      sourceclock = LL_RCC_GetI2SClockFreq(LL_RCC_I2S1_CLKSOURCE);
+
+      /* 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));
+}
+
+#if defined (SPI_I2S_FULLDUPLEX_SUPPORT)
+/**
+  * @brief  Configures the full duplex mode for the I2Sx peripheral using its extension
+  *         I2Sxext according to the specified parameters in the I2S_InitStruct.
+  * @note   The structure pointed by I2S_InitStruct parameter should be the same
+  *         used for the master I2S peripheral. In this case, if the master is
+  *         configured as transmitter, the slave will be receiver and vice versa.
+  *         Or you can force a different mode by modifying the field I2S_Mode to the
+  *         value I2S_SlaveRx or I2S_SlaveTx independently of the master configuration.
+  * @param  I2Sxext SPI Instance
+  * @param  I2S_InitStruct pointer to a @ref LL_I2S_InitTypeDef structure
+  * @retval An ErrorStatus enumeration value:
+  *          - SUCCESS: I2Sxext registers are Initialized
+  *          - ERROR: I2Sxext registers are not Initialized
+  */
+ErrorStatus  LL_I2S_InitFullDuplex(SPI_TypeDef *I2Sxext, LL_I2S_InitTypeDef *I2S_InitStruct)
+{
+  uint16_t mode = 0U;
+  ErrorStatus status = ERROR;
+
+  /* Check the I2S parameters */
+  assert_param(IS_I2S_EXT_ALL_INSTANCE(I2Sxext));
+  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_CPOL(I2S_InitStruct->ClockPolarity));
+
+  if (LL_I2S_IsEnabled(I2Sxext) == 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
+     */
+
+    /* Reset I2SPR registers */
+    WRITE_REG(I2Sxext->I2SPR, I2S_I2SPR_CLEAR_MASK);
+
+    /* Get the mode to be configured for the extended I2S */
+    if ((I2S_InitStruct->Mode == LL_I2S_MODE_MASTER_TX) || (I2S_InitStruct->Mode == LL_I2S_MODE_SLAVE_TX))
+    {
+      mode = LL_I2S_MODE_SLAVE_RX;
+    }
+    else
+    {
+      if ((I2S_InitStruct->Mode == LL_I2S_MODE_MASTER_RX) || (I2S_InitStruct->Mode == LL_I2S_MODE_SLAVE_RX))
+      {
+        mode = LL_I2S_MODE_SLAVE_TX;
+      }
+    }
+
+    /* Write to SPIx I2SCFGR */
+    MODIFY_REG(I2Sxext->I2SCFGR,
+               I2S_I2SCFGR_CLEAR_MASK,
+               I2S_InitStruct->Standard |
+               I2S_InitStruct->DataFormat | I2S_InitStruct->ClockPolarity |
+               SPI_I2SCFGR_I2SMOD | mode);
+
+    status = SUCCESS;
+  }
+  return status;
+}
+#endif /* SPI_I2S_FULLDUPLEX_SUPPORT */
+
+/**
+  * @}
+  */
+
+/**
+  * @}
+  */
+
+/**
+  * @}
+  */
+
+#endif /* defined (SPI1) || defined (SPI2) || defined (SPI3) || defined (SPI4) || defined (SPI5) || defined(SPI6) */
+
+/**
+  * @}
+  */
+
+#endif /* USE_FULL_LL_DRIVER */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/