/Target/Demo/ARMCM3_STM32F103_DiWheelDrive_GCC/Boot/lib/STM32F10x_StdPeriph_Driver/src/stm32f10x_spi.c - AMiRo-OS - Research for Cognitive Interaction

amiro-blt / Target / Demo / ARMCM3_STM32F103_DiWheelDrive_GCC / Boot / lib / STM32F10x_StdPeriph_Driver / src / stm32f10x_spi.c @ 69661903

History | View | Annotate | Download (29.5 KB)

       /**
         ******************************************************************************
         * @file    stm32f10x_spi.c
         * @author  MCD Application Team
         * @version V3.5.0
         * @date    11-March-2011
         * @brief   This file provides all the SPI firmware functions.
         ******************************************************************************
         * @attention
+        *
         * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
         * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
         * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY
         * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
         * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
         * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
+        *
         * <h2><center>&copy; COPYRIGHT 2011 STMicroelectronics</center></h2>
         ******************************************************************************
         */
       /* Includes ------------------------------------------------------------------*/
       #include "stm32f10x_spi.h"
       #include "stm32f10x_rcc.h"
       /** @addtogroup STM32F10x_StdPeriph_Driver
         * @{
         */
       /** @defgroup SPI
         * @brief SPI driver modules
         * @{
         */
       /** @defgroup SPI_Private_TypesDefinitions
         * @{
         */
       /**
         * @}
         */
       /** @defgroup SPI_Private_Defines
         * @{
         */
       /* SPI SPE mask */
       #define CR1_SPE_Set          ((uint16_t)0x0040)
       #define CR1_SPE_Reset        ((uint16_t)0xFFBF)
       /* I2S I2SE mask */
       #define I2SCFGR_I2SE_Set     ((uint16_t)0x0400)
       #define I2SCFGR_I2SE_Reset   ((uint16_t)0xFBFF)
       /* SPI CRCNext mask */
       #define CR1_CRCNext_Set      ((uint16_t)0x1000)
       /* SPI CRCEN mask */
       #define CR1_CRCEN_Set        ((uint16_t)0x2000)
       #define CR1_CRCEN_Reset      ((uint16_t)0xDFFF)
       /* SPI SSOE mask */
       #define CR2_SSOE_Set         ((uint16_t)0x0004)
       #define CR2_SSOE_Reset       ((uint16_t)0xFFFB)
       /* SPI registers Masks */
       #define CR1_CLEAR_Mask       ((uint16_t)0x3040)
       #define I2SCFGR_CLEAR_Mask   ((uint16_t)0xF040)
       /* SPI or I2S mode selection masks */
       #define SPI_Mode_Select      ((uint16_t)0xF7FF)
       #define I2S_Mode_Select      ((uint16_t)0x0800)
       /* I2S clock source selection masks */
       #define I2S2_CLOCK_SRC       ((uint32_t)(0x00020000))
       #define I2S3_CLOCK_SRC       ((uint32_t)(0x00040000))
       #define I2S_MUL_MASK         ((uint32_t)(0x0000F000))
       #define I2S_DIV_MASK         ((uint32_t)(0x000000F0))
       /**
         * @}
         */
       /** @defgroup SPI_Private_Macros
         * @{
         */
       /**
         * @}
         */
       /** @defgroup SPI_Private_Variables
         * @{
         */
       /**
         * @}
         */
       /** @defgroup SPI_Private_FunctionPrototypes
         * @{
         */
       /**
         * @}
         */
       /** @defgroup SPI_Private_Functions
         * @{
         */
       /**
         * @brief  Deinitializes the SPIx peripheral registers to their default
         *         reset values (Affects also the I2Ss).
         * @param  SPIx: where x can be 1, 2 or 3 to select the SPI peripheral.
         * @retval None
         */
       void SPI_I2S_DeInit(SPI_TypeDef* SPIx)
+      {
         /* Check the parameters */
         assert_param(IS_SPI_ALL_PERIPH(SPIx));
         if (SPIx == SPI1)
+        {
           /* Enable SPI1 reset state */
           RCC_APB2PeriphResetCmd(RCC_APB2Periph_SPI1, ENABLE);
           /* Release SPI1 from reset state */
           RCC_APB2PeriphResetCmd(RCC_APB2Periph_SPI1, DISABLE);
+        }
         else if (SPIx == SPI2)
+        {
           /* Enable SPI2 reset state */
           RCC_APB1PeriphResetCmd(RCC_APB1Periph_SPI2, ENABLE);
           /* Release SPI2 from reset state */
           RCC_APB1PeriphResetCmd(RCC_APB1Periph_SPI2, DISABLE);
+        }
         else
+        {
           if (SPIx == SPI3)
+          {
             /* Enable SPI3 reset state */
             RCC_APB1PeriphResetCmd(RCC_APB1Periph_SPI3, ENABLE);
             /* Release SPI3 from reset state */
             RCC_APB1PeriphResetCmd(RCC_APB1Periph_SPI3, DISABLE);
+          }
+        }
+      }
       /**
         * @brief  Initializes the SPIx peripheral according to the specified
         *         parameters in the SPI_InitStruct.
         * @param  SPIx: where x can be 1, 2 or 3 to select the SPI peripheral.
         * @param  SPI_InitStruct: pointer to a SPI_InitTypeDef structure that
         *         contains the configuration information for the specified SPI peripheral.
         * @retval None
         */
       void SPI_Init(SPI_TypeDef* SPIx, SPI_InitTypeDef* SPI_InitStruct)
+      {
         uint16_t tmpreg = 0;
         /* check the parameters */
         assert_param(IS_SPI_ALL_PERIPH(SPIx));
         /* Check the SPI parameters */
         assert_param(IS_SPI_DIRECTION_MODE(SPI_InitStruct->SPI_Direction));
         assert_param(IS_SPI_MODE(SPI_InitStruct->SPI_Mode));
         assert_param(IS_SPI_DATASIZE(SPI_InitStruct->SPI_DataSize));
         assert_param(IS_SPI_CPOL(SPI_InitStruct->SPI_CPOL));
         assert_param(IS_SPI_CPHA(SPI_InitStruct->SPI_CPHA));
         assert_param(IS_SPI_NSS(SPI_InitStruct->SPI_NSS));
         assert_param(IS_SPI_BAUDRATE_PRESCALER(SPI_InitStruct->SPI_BaudRatePrescaler));
         assert_param(IS_SPI_FIRST_BIT(SPI_InitStruct->SPI_FirstBit));
         assert_param(IS_SPI_CRC_POLYNOMIAL(SPI_InitStruct->SPI_CRCPolynomial));
       /*---------------------------- SPIx CR1 Configuration ------------------------*/
         /* Get the SPIx CR1 value */
         tmpreg = SPIx->CR1;
         /* Clear BIDIMode, BIDIOE, RxONLY, SSM, SSI, LSBFirst, BR, MSTR, CPOL and CPHA bits */
         tmpreg &= CR1_CLEAR_Mask;
         /* Configure SPIx: direction, NSS management, first transmitted bit, BaudRate prescaler
            master/salve mode, CPOL and CPHA */
         /* Set BIDImode, BIDIOE and RxONLY bits according to SPI_Direction value */
         /* Set SSM, SSI and MSTR bits according to SPI_Mode and SPI_NSS values */
         /* Set LSBFirst bit according to SPI_FirstBit value */
         /* Set BR bits according to SPI_BaudRatePrescaler value */
         /* Set CPOL bit according to SPI_CPOL value */
         /* Set CPHA bit according to SPI_CPHA value */
         tmpreg |= (uint16_t)((uint32_t)SPI_InitStruct->SPI_Direction | SPI_InitStruct->SPI_Mode |
                         SPI_InitStruct->SPI_DataSize | SPI_InitStruct->SPI_CPOL |
                         SPI_InitStruct->SPI_CPHA | SPI_InitStruct->SPI_NSS |
                         SPI_InitStruct->SPI_BaudRatePrescaler | SPI_InitStruct->SPI_FirstBit);
         /* Write to SPIx CR1 */
         SPIx->CR1 = tmpreg;
         /* Activate the SPI mode (Reset I2SMOD bit in I2SCFGR register) */
         SPIx->I2SCFGR &= SPI_Mode_Select;
       /*---------------------------- SPIx CRCPOLY Configuration --------------------*/
         /* Write to SPIx CRCPOLY */
         SPIx->CRCPR = SPI_InitStruct->SPI_CRCPolynomial;
+      }
       /**
         * @brief  Initializes the SPIx peripheral according to the specified
         *         parameters in the I2S_InitStruct.
         * @param  SPIx: where x can be  2 or 3 to select the SPI peripheral
         *         (configured in I2S mode).
         * @param  I2S_InitStruct: pointer to an I2S_InitTypeDef structure that
         *         contains the configuration information for the specified SPI peripheral
         *         configured in I2S mode.
         * @note
         *  The function calculates the optimal prescaler needed to obtain the most
         *  accurate audio frequency (depending on the I2S clock source, the PLL values
         *  and the product configuration). But in case the prescaler value is greater
         *  than 511, the default value (0x02) will be configured instead.  *
         * @retval None
         */
       void I2S_Init(SPI_TypeDef* SPIx, I2S_InitTypeDef* I2S_InitStruct)
+      {
         uint16_t tmpreg = 0, i2sdiv = 2, i2sodd = 0, packetlength = 1;
         uint32_t tmp = 0;
         RCC_ClocksTypeDef RCC_Clocks;
         uint32_t sourceclock = 0;
         /* Check the I2S parameters */
         assert_param(IS_SPI_23_PERIPH(SPIx));
         assert_param(IS_I2S_MODE(I2S_InitStruct->I2S_Mode));
         assert_param(IS_I2S_STANDARD(I2S_InitStruct->I2S_Standard));
         assert_param(IS_I2S_DATA_FORMAT(I2S_InitStruct->I2S_DataFormat));
         assert_param(IS_I2S_MCLK_OUTPUT(I2S_InitStruct->I2S_MCLKOutput));
         assert_param(IS_I2S_AUDIO_FREQ(I2S_InitStruct->I2S_AudioFreq));
         assert_param(IS_I2S_CPOL(I2S_InitStruct->I2S_CPOL));
       /*----------------------- SPIx I2SCFGR & I2SPR Configuration -----------------*/
         /* Clear I2SMOD, I2SE, I2SCFG, PCMSYNC, I2SSTD, CKPOL, DATLEN and CHLEN bits */
         SPIx->I2SCFGR &= I2SCFGR_CLEAR_Mask;
         SPIx->I2SPR = 0x0002;
         /* Get the I2SCFGR register value */
         tmpreg = SPIx->I2SCFGR;
         /* If the default value has to be written, reinitialize i2sdiv and i2sodd*/
         if(I2S_InitStruct->I2S_AudioFreq == I2S_AudioFreq_Default)
+        {
           i2sodd = (uint16_t)0;
           i2sdiv = (uint16_t)2;
+        }
         /* If the requested audio frequency is not the default, compute the prescaler */
         else
+        {
           /* Check the frame length (For the Prescaler computing) */
           if(I2S_InitStruct->I2S_DataFormat == I2S_DataFormat_16b)
+          {
             /* Packet length is 16 bits */
             packetlength = 1;
+          }
           else
+          {
             /* Packet length is 32 bits */
             packetlength = 2;
+          }
           /* Get the I2S clock source mask depending on the peripheral number */
           if(((uint32_t)SPIx) == SPI2_BASE)
+          {
             /* The mask is relative to I2S2 */
             tmp = I2S2_CLOCK_SRC;
+          }
           else
+          {
             /* The mask is relative to I2S3 */
             tmp = I2S3_CLOCK_SRC;
+          }
           /* Check the I2S clock source configuration depending on the Device:
              Only Connectivity line devices have the PLL3 VCO clock */
       #ifdef STM32F10X_CL
           if((RCC->CFGR2 & tmp) != 0)
+          {
             /* Get the configuration bits of RCC PLL3 multiplier */
             tmp = (uint32_t)((RCC->CFGR2 & I2S_MUL_MASK) >> 12);
             /* Get the value of the PLL3 multiplier */
             if((tmp > 5) && (tmp < 15))
+            {
               /* Multiplier is between 8 and 14 (value 15 is forbidden) */
               tmp += 2;
+            }
             else
+            {
               if (tmp == 15)
+              {
                 /* Multiplier is 20 */
                 tmp = 20;
+              }
+            }
             /* Get the PREDIV2 value */
             sourceclock = (uint32_t)(((RCC->CFGR2 & I2S_DIV_MASK) >> 4) + 1);
             /* Calculate the Source Clock frequency based on PLL3 and PREDIV2 values */
             sourceclock = (uint32_t) ((HSE_Value / sourceclock) * tmp * 2);
+          }
           else
+          {
             /* I2S Clock source is System clock: Get System Clock frequency */
             RCC_GetClocksFreq(&RCC_Clocks);
             /* Get the source clock value: based on System Clock value */
             sourceclock = RCC_Clocks.SYSCLK_Frequency;
+          }
       #else /* STM32F10X_HD */
           /* I2S Clock source is System clock: Get System Clock frequency */
           RCC_GetClocksFreq(&RCC_Clocks);
           /* Get the source clock value: based on System Clock value */
           sourceclock = RCC_Clocks.SYSCLK_Frequency;
       #endif /* STM32F10X_CL */
           /* Compute the Real divider depending on the MCLK output state with a floating point */
           if(I2S_InitStruct->I2S_MCLKOutput == I2S_MCLKOutput_Enable)
+          {
             /* MCLK output is enabled */
             tmp = (uint16_t)(((((sourceclock / 256) * 10) / I2S_InitStruct->I2S_AudioFreq)) + 5);
+          }
           else
+          {
             /* MCLK output is disabled */
             tmp = (uint16_t)(((((sourceclock / (32 * packetlength)) *10 ) / I2S_InitStruct->I2S_AudioFreq)) + 5);
+          }
           /* Remove the floating point */
           tmp = tmp / 10;
           /* Check the parity of the divider */
           i2sodd = (uint16_t)(tmp & (uint16_t)0x0001);
           /* Compute the i2sdiv prescaler */
           i2sdiv = (uint16_t)((tmp - i2sodd) / 2);
           /* Get the Mask for the Odd bit (SPI_I2SPR[8]) register */
           i2sodd = (uint16_t) (i2sodd << 8);
+        }
         /* Test if the divider is 1 or 0 or greater than 0xFF */
         if ((i2sdiv < 2) || (i2sdiv > 0xFF))
+        {
           /* Set the default values */
           i2sdiv = 2;
           i2sodd = 0;
+        }
         /* Write to SPIx I2SPR register the computed value */
         SPIx->I2SPR = (uint16_t)(i2sdiv | (uint16_t)(i2sodd | (uint16_t)I2S_InitStruct->I2S_MCLKOutput));
         /* Configure the I2S with the SPI_InitStruct values */
         tmpreg |= (uint16_t)(I2S_Mode_Select | (uint16_t)(I2S_InitStruct->I2S_Mode | \
                         (uint16_t)(I2S_InitStruct->I2S_Standard | (uint16_t)(I2S_InitStruct->I2S_DataFormat | \
                         (uint16_t)I2S_InitStruct->I2S_CPOL))));
         /* Write to SPIx I2SCFGR */
         SPIx->I2SCFGR = tmpreg;
+      }
       /**
         * @brief  Fills each SPI_InitStruct member with its default value.
         * @param  SPI_InitStruct : pointer to a SPI_InitTypeDef structure which will be initialized.
         * @retval None
         */
       void SPI_StructInit(SPI_InitTypeDef* SPI_InitStruct)
+      {
       /*--------------- Reset SPI init structure parameters values -----------------*/
         /* Initialize the SPI_Direction member */
         SPI_InitStruct->SPI_Direction = SPI_Direction_2Lines_FullDuplex;
         /* initialize the SPI_Mode member */
         SPI_InitStruct->SPI_Mode = SPI_Mode_Slave;
         /* initialize the SPI_DataSize member */
         SPI_InitStruct->SPI_DataSize = SPI_DataSize_8b;
         /* Initialize the SPI_CPOL member */
         SPI_InitStruct->SPI_CPOL = SPI_CPOL_Low;
         /* Initialize the SPI_CPHA member */
         SPI_InitStruct->SPI_CPHA = SPI_CPHA_1Edge;
         /* Initialize the SPI_NSS member */
         SPI_InitStruct->SPI_NSS = SPI_NSS_Hard;
         /* Initialize the SPI_BaudRatePrescaler member */
         SPI_InitStruct->SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_2;
         /* Initialize the SPI_FirstBit member */
         SPI_InitStruct->SPI_FirstBit = SPI_FirstBit_MSB;
         /* Initialize the SPI_CRCPolynomial member */
         SPI_InitStruct->SPI_CRCPolynomial = 7;
+      }
       /**
         * @brief  Fills each I2S_InitStruct member with its default value.
         * @param  I2S_InitStruct : pointer to a I2S_InitTypeDef structure which will be initialized.
         * @retval None
         */
       void I2S_StructInit(I2S_InitTypeDef* I2S_InitStruct)
+      {
       /*--------------- Reset I2S init structure parameters values -----------------*/
         /* Initialize the I2S_Mode member */
         I2S_InitStruct->I2S_Mode = I2S_Mode_SlaveTx;
         /* Initialize the I2S_Standard member */
         I2S_InitStruct->I2S_Standard = I2S_Standard_Phillips;
         /* Initialize the I2S_DataFormat member */
         I2S_InitStruct->I2S_DataFormat = I2S_DataFormat_16b;
         /* Initialize the I2S_MCLKOutput member */
         I2S_InitStruct->I2S_MCLKOutput = I2S_MCLKOutput_Disable;
         /* Initialize the I2S_AudioFreq member */
         I2S_InitStruct->I2S_AudioFreq = I2S_AudioFreq_Default;
         /* Initialize the I2S_CPOL member */
         I2S_InitStruct->I2S_CPOL = I2S_CPOL_Low;
+      }
       /**
         * @brief  Enables or disables the specified SPI peripheral.
         * @param  SPIx: where x can be 1, 2 or 3 to select the SPI peripheral.
         * @param  NewState: new state of the SPIx peripheral.
         *   This parameter can be: ENABLE or DISABLE.
         * @retval None
         */
       void SPI_Cmd(SPI_TypeDef* SPIx, FunctionalState NewState)
+      {
         /* Check the parameters */
         assert_param(IS_SPI_ALL_PERIPH(SPIx));
         assert_param(IS_FUNCTIONAL_STATE(NewState));
         if (NewState != DISABLE)
+        {
           /* Enable the selected SPI peripheral */
           SPIx->CR1 |= CR1_SPE_Set;
+        }
         else
+        {
           /* Disable the selected SPI peripheral */
           SPIx->CR1 &= CR1_SPE_Reset;
+        }
+      }
       /**
         * @brief  Enables or disables the specified SPI peripheral (in I2S mode).
         * @param  SPIx: where x can be 2 or 3 to select the SPI peripheral.
         * @param  NewState: new state of the SPIx peripheral.
         *   This parameter can be: ENABLE or DISABLE.
         * @retval None
         */
       void I2S_Cmd(SPI_TypeDef* SPIx, FunctionalState NewState)
+      {
         /* Check the parameters */
         assert_param(IS_SPI_23_PERIPH(SPIx));
         assert_param(IS_FUNCTIONAL_STATE(NewState));
         if (NewState != DISABLE)
+        {
           /* Enable the selected SPI peripheral (in I2S mode) */
           SPIx->I2SCFGR |= I2SCFGR_I2SE_Set;
+        }
         else
+        {
           /* Disable the selected SPI peripheral (in I2S mode) */
           SPIx->I2SCFGR &= I2SCFGR_I2SE_Reset;
+        }
+      }
       /**
         * @brief  Enables or disables the specified SPI/I2S interrupts.
         * @param  SPIx: where x can be
         *   - 1, 2 or 3 in SPI mode
         *   - 2 or 3 in I2S mode
         * @param  SPI_I2S_IT: specifies the SPI/I2S interrupt source to be enabled or disabled.
         *   This parameter can be one of the following values:
         *     @arg SPI_I2S_IT_TXE: Tx buffer empty interrupt mask
         *     @arg SPI_I2S_IT_RXNE: Rx buffer not empty interrupt mask
         *     @arg SPI_I2S_IT_ERR: Error interrupt mask
         * @param  NewState: new state of the specified SPI/I2S interrupt.
         *   This parameter can be: ENABLE or DISABLE.
         * @retval None
         */
       void SPI_I2S_ITConfig(SPI_TypeDef* SPIx, uint8_t SPI_I2S_IT, FunctionalState NewState)
+      {
         uint16_t itpos = 0, itmask = 0 ;
         /* Check the parameters */
         assert_param(IS_SPI_ALL_PERIPH(SPIx));
         assert_param(IS_FUNCTIONAL_STATE(NewState));
         assert_param(IS_SPI_I2S_CONFIG_IT(SPI_I2S_IT));
         /* Get the SPI/I2S IT index */
         itpos = SPI_I2S_IT >> 4;
         /* Set the IT mask */
         itmask = (uint16_t)1 << (uint16_t)itpos;
         if (NewState != DISABLE)
+        {
           /* Enable the selected SPI/I2S interrupt */
           SPIx->CR2 |= itmask;
+        }
         else
+        {
           /* Disable the selected SPI/I2S interrupt */
           SPIx->CR2 &= (uint16_t)~itmask;
+        }
+      }
       /**
         * @brief  Enables or disables the SPIx/I2Sx DMA interface.
         * @param  SPIx: where x can be
         *   - 1, 2 or 3 in SPI mode
         *   - 2 or 3 in I2S mode
         * @param  SPI_I2S_DMAReq: specifies the SPI/I2S DMA transfer request to be enabled or disabled.
         *   This parameter can be any combination of the following values:
         *     @arg SPI_I2S_DMAReq_Tx: Tx buffer DMA transfer request
         *     @arg SPI_I2S_DMAReq_Rx: Rx buffer DMA transfer request
         * @param  NewState: new state of the selected SPI/I2S DMA transfer request.
         *   This parameter can be: ENABLE or DISABLE.
         * @retval None
         */
       void SPI_I2S_DMACmd(SPI_TypeDef* SPIx, uint16_t SPI_I2S_DMAReq, FunctionalState NewState)
+      {
         /* Check the parameters */
         assert_param(IS_SPI_ALL_PERIPH(SPIx));
         assert_param(IS_FUNCTIONAL_STATE(NewState));
         assert_param(IS_SPI_I2S_DMAREQ(SPI_I2S_DMAReq));
         if (NewState != DISABLE)
+        {
           /* Enable the selected SPI/I2S DMA requests */
           SPIx->CR2 |= SPI_I2S_DMAReq;
+        }
         else
+        {
           /* Disable the selected SPI/I2S DMA requests */
           SPIx->CR2 &= (uint16_t)~SPI_I2S_DMAReq;
+        }
+      }
       /**
         * @brief  Transmits a Data through the SPIx/I2Sx peripheral.
         * @param  SPIx: where x can be
         *   - 1, 2 or 3 in SPI mode
         *   - 2 or 3 in I2S mode
         * @param  Data : Data to be transmitted.
         * @retval None
         */
       void SPI_I2S_SendData(SPI_TypeDef* SPIx, uint16_t Data)
+      {
         /* Check the parameters */
         assert_param(IS_SPI_ALL_PERIPH(SPIx));
         /* Write in the DR register the data to be sent */
         SPIx->DR = Data;
+      }
       /**
         * @brief  Returns the most recent received data by the SPIx/I2Sx peripheral.
         * @param  SPIx: where x can be
         *   - 1, 2 or 3 in SPI mode
         *   - 2 or 3 in I2S mode
         * @retval The value of the received data.
         */
       uint16_t SPI_I2S_ReceiveData(SPI_TypeDef* SPIx)
+      {
         /* Check the parameters */
         assert_param(IS_SPI_ALL_PERIPH(SPIx));
         /* Return the data in the DR register */
         return SPIx->DR;
+      }
       /**
         * @brief  Configures internally by software the NSS pin for the selected SPI.
         * @param  SPIx: where x can be 1, 2 or 3 to select the SPI peripheral.
         * @param  SPI_NSSInternalSoft: specifies the SPI NSS internal state.
         *   This parameter can be one of the following values:
         *     @arg SPI_NSSInternalSoft_Set: Set NSS pin internally
         *     @arg SPI_NSSInternalSoft_Reset: Reset NSS pin internally
         * @retval None
         */
       void SPI_NSSInternalSoftwareConfig(SPI_TypeDef* SPIx, uint16_t SPI_NSSInternalSoft)
+      {
         /* Check the parameters */
         assert_param(IS_SPI_ALL_PERIPH(SPIx));
         assert_param(IS_SPI_NSS_INTERNAL(SPI_NSSInternalSoft));
         if (SPI_NSSInternalSoft != SPI_NSSInternalSoft_Reset)
+        {
           /* Set NSS pin internally by software */
           SPIx->CR1 |= SPI_NSSInternalSoft_Set;
+        }
         else
+        {
           /* Reset NSS pin internally by software */
           SPIx->CR1 &= SPI_NSSInternalSoft_Reset;
+        }
+      }
       /**
         * @brief  Enables or disables the SS output for the selected SPI.
         * @param  SPIx: where x can be 1, 2 or 3 to select the SPI peripheral.
         * @param  NewState: new state of the SPIx SS output.
         *   This parameter can be: ENABLE or DISABLE.
         * @retval None
         */
       void SPI_SSOutputCmd(SPI_TypeDef* SPIx, FunctionalState NewState)
+      {
         /* Check the parameters */
         assert_param(IS_SPI_ALL_PERIPH(SPIx));
         assert_param(IS_FUNCTIONAL_STATE(NewState));
         if (NewState != DISABLE)
+        {
           /* Enable the selected SPI SS output */
           SPIx->CR2 |= CR2_SSOE_Set;
+        }
         else
+        {
           /* Disable the selected SPI SS output */
           SPIx->CR2 &= CR2_SSOE_Reset;
+        }
+      }
       /**
         * @brief  Configures the data size for the selected SPI.
         * @param  SPIx: where x can be 1, 2 or 3 to select the SPI peripheral.
         * @param  SPI_DataSize: specifies the SPI data size.
         *   This parameter can be one of the following values:
         *     @arg SPI_DataSize_16b: Set data frame format to 16bit
         *     @arg SPI_DataSize_8b: Set data frame format to 8bit
         * @retval None
         */
       void SPI_DataSizeConfig(SPI_TypeDef* SPIx, uint16_t SPI_DataSize)
+      {
         /* Check the parameters */
         assert_param(IS_SPI_ALL_PERIPH(SPIx));
         assert_param(IS_SPI_DATASIZE(SPI_DataSize));
         /* Clear DFF bit */
         SPIx->CR1 &= (uint16_t)~SPI_DataSize_16b;
         /* Set new DFF bit value */
         SPIx->CR1 |= SPI_DataSize;
+      }
       /**
         * @brief  Transmit the SPIx CRC value.
         * @param  SPIx: where x can be 1, 2 or 3 to select the SPI peripheral.
         * @retval None
         */
       void SPI_TransmitCRC(SPI_TypeDef* SPIx)
+      {
         /* Check the parameters */
         assert_param(IS_SPI_ALL_PERIPH(SPIx));
         /* Enable the selected SPI CRC transmission */
         SPIx->CR1 |= CR1_CRCNext_Set;
+      }
       /**
         * @brief  Enables or disables the CRC value calculation of the transferred bytes.
         * @param  SPIx: where x can be 1, 2 or 3 to select the SPI peripheral.
         * @param  NewState: new state of the SPIx CRC value calculation.
         *   This parameter can be: ENABLE or DISABLE.
         * @retval None
         */
       void SPI_CalculateCRC(SPI_TypeDef* SPIx, FunctionalState NewState)
+      {
         /* Check the parameters */
         assert_param(IS_SPI_ALL_PERIPH(SPIx));
         assert_param(IS_FUNCTIONAL_STATE(NewState));
         if (NewState != DISABLE)
+        {
           /* Enable the selected SPI CRC calculation */
           SPIx->CR1 |= CR1_CRCEN_Set;
+        }
         else
+        {
           /* Disable the selected SPI CRC calculation */
           SPIx->CR1 &= CR1_CRCEN_Reset;
+        }
+      }
       /**
         * @brief  Returns the transmit or the receive CRC register value for the specified SPI.
         * @param  SPIx: where x can be 1, 2 or 3 to select the SPI peripheral.
         * @param  SPI_CRC: specifies the CRC register to be read.
         *   This parameter can be one of the following values:
         *     @arg SPI_CRC_Tx: Selects Tx CRC register
         *     @arg SPI_CRC_Rx: Selects Rx CRC register
         * @retval The selected CRC register value..
         */
       uint16_t SPI_GetCRC(SPI_TypeDef* SPIx, uint8_t SPI_CRC)
+      {
         uint16_t crcreg = 0;
         /* Check the parameters */
         assert_param(IS_SPI_ALL_PERIPH(SPIx));
         assert_param(IS_SPI_CRC(SPI_CRC));
         if (SPI_CRC != SPI_CRC_Rx)
+        {
           /* Get the Tx CRC register */
           crcreg = SPIx->TXCRCR;
+        }
         else
+        {
           /* Get the Rx CRC register */
           crcreg = SPIx->RXCRCR;
+        }
         /* Return the selected CRC register */
         return crcreg;
+      }
       /**
         * @brief  Returns the CRC Polynomial register value for the specified SPI.
         * @param  SPIx: where x can be 1, 2 or 3 to select the SPI peripheral.
         * @retval The CRC Polynomial register value.
         */
       uint16_t SPI_GetCRCPolynomial(SPI_TypeDef* SPIx)
+      {
         /* Check the parameters */
         assert_param(IS_SPI_ALL_PERIPH(SPIx));
         /* Return the CRC polynomial register */
         return SPIx->CRCPR;
+      }
       /**
         * @brief  Selects the data transfer direction in bi-directional mode for the specified SPI.
         * @param  SPIx: where x can be 1, 2 or 3 to select the SPI peripheral.
         * @param  SPI_Direction: specifies the data transfer direction in bi-directional mode.
         *   This parameter can be one of the following values:
         *     @arg SPI_Direction_Tx: Selects Tx transmission direction
         *     @arg SPI_Direction_Rx: Selects Rx receive direction
         * @retval None
         */
       void SPI_BiDirectionalLineConfig(SPI_TypeDef* SPIx, uint16_t SPI_Direction)
+      {
         /* Check the parameters */
         assert_param(IS_SPI_ALL_PERIPH(SPIx));
         assert_param(IS_SPI_DIRECTION(SPI_Direction));
         if (SPI_Direction == SPI_Direction_Tx)
+        {
           /* Set the Tx only mode */
           SPIx->CR1 |= SPI_Direction_Tx;
+        }
         else
+        {
           /* Set the Rx only mode */
           SPIx->CR1 &= SPI_Direction_Rx;
+        }
+      }
       /**
         * @brief  Checks whether the specified SPI/I2S flag is set or not.
         * @param  SPIx: where x can be
         *   - 1, 2 or 3 in SPI mode
         *   - 2 or 3 in I2S mode
         * @param  SPI_I2S_FLAG: specifies the SPI/I2S flag to check.
         *   This parameter can be one of the following values:
         *     @arg SPI_I2S_FLAG_TXE: Transmit buffer empty flag.
         *     @arg SPI_I2S_FLAG_RXNE: Receive buffer not empty flag.
         *     @arg SPI_I2S_FLAG_BSY: Busy flag.
         *     @arg SPI_I2S_FLAG_OVR: Overrun flag.
         *     @arg SPI_FLAG_MODF: Mode Fault flag.
         *     @arg SPI_FLAG_CRCERR: CRC Error flag.
         *     @arg I2S_FLAG_UDR: Underrun Error flag.
         *     @arg I2S_FLAG_CHSIDE: Channel Side flag.
         * @retval The new state of SPI_I2S_FLAG (SET or RESET).
         */
       FlagStatus SPI_I2S_GetFlagStatus(SPI_TypeDef* SPIx, uint16_t SPI_I2S_FLAG)
+      {
         FlagStatus bitstatus = RESET;
         /* Check the parameters */
         assert_param(IS_SPI_ALL_PERIPH(SPIx));
         assert_param(IS_SPI_I2S_GET_FLAG(SPI_I2S_FLAG));
         /* Check the status of the specified SPI/I2S flag */
         if ((SPIx->SR & SPI_I2S_FLAG) != (uint16_t)RESET)
+        {
           /* SPI_I2S_FLAG is set */
           bitstatus = SET;
+        }
         else
+        {
           /* SPI_I2S_FLAG is reset */
           bitstatus = RESET;
+        }
         /* Return the SPI_I2S_FLAG status */
         return  bitstatus;
+      }
       /**
         * @brief  Clears the SPIx CRC Error (CRCERR) flag.
         * @param  SPIx: where x can be
         *   - 1, 2 or 3 in SPI mode
         * @param  SPI_I2S_FLAG: specifies the SPI flag to clear.
         *   This function clears only CRCERR flag.
         * @note
         *   - OVR (OverRun error) flag is cleared by software sequence: a read
         *     operation to SPI_DR register (SPI_I2S_ReceiveData()) followed by a read
         *     operation to SPI_SR register (SPI_I2S_GetFlagStatus()).
         *   - UDR (UnderRun error) flag is cleared by a read operation to
         *     SPI_SR register (SPI_I2S_GetFlagStatus()).
         *   - MODF (Mode Fault) flag is cleared by software sequence: a read/write
         *     operation to SPI_SR register (SPI_I2S_GetFlagStatus()) followed by a
         *     write operation to SPI_CR1 register (SPI_Cmd() to enable the SPI).
         * @retval None
         */
       void SPI_I2S_ClearFlag(SPI_TypeDef* SPIx, uint16_t SPI_I2S_FLAG)
+      {
         /* Check the parameters */
         assert_param(IS_SPI_ALL_PERIPH(SPIx));
         assert_param(IS_SPI_I2S_CLEAR_FLAG(SPI_I2S_FLAG));
           /* Clear the selected SPI CRC Error (CRCERR) flag */
           SPIx->SR = (uint16_t)~SPI_I2S_FLAG;
+      }
       /**
         * @brief  Checks whether the specified SPI/I2S interrupt has occurred or not.
         * @param  SPIx: where x can be
         *   - 1, 2 or 3 in SPI mode
         *   - 2 or 3 in I2S mode
         * @param  SPI_I2S_IT: specifies the SPI/I2S interrupt source to check.
         *   This parameter can be one of the following values:
         *     @arg SPI_I2S_IT_TXE: Transmit buffer empty interrupt.
         *     @arg SPI_I2S_IT_RXNE: Receive buffer not empty interrupt.
         *     @arg SPI_I2S_IT_OVR: Overrun interrupt.
         *     @arg SPI_IT_MODF: Mode Fault interrupt.
         *     @arg SPI_IT_CRCERR: CRC Error interrupt.
         *     @arg I2S_IT_UDR: Underrun Error interrupt.
         * @retval The new state of SPI_I2S_IT (SET or RESET).
         */
       ITStatus SPI_I2S_GetITStatus(SPI_TypeDef* SPIx, uint8_t SPI_I2S_IT)
+      {
         ITStatus bitstatus = RESET;
         uint16_t itpos = 0, itmask = 0, enablestatus = 0;
         /* Check the parameters */
         assert_param(IS_SPI_ALL_PERIPH(SPIx));
         assert_param(IS_SPI_I2S_GET_IT(SPI_I2S_IT));
         /* Get the SPI/I2S IT index */
         itpos = 0x01 << (SPI_I2S_IT & 0x0F);
         /* Get the SPI/I2S IT mask */
         itmask = SPI_I2S_IT >> 4;
         /* Set the IT mask */
         itmask = 0x01 << itmask;
         /* Get the SPI_I2S_IT enable bit status */
         enablestatus = (SPIx->CR2 & itmask) ;
         /* Check the status of the specified SPI/I2S interrupt */
         if (((SPIx->SR & itpos) != (uint16_t)RESET) && enablestatus)
+        {
           /* SPI_I2S_IT is set */
           bitstatus = SET;
+        }
         else
+        {
           /* SPI_I2S_IT is reset */
           bitstatus = RESET;
+        }
         /* Return the SPI_I2S_IT status */
         return bitstatus;
+      }
       /**
         * @brief  Clears the SPIx CRC Error (CRCERR) interrupt pending bit.
         * @param  SPIx: where x can be
         *   - 1, 2 or 3 in SPI mode
         * @param  SPI_I2S_IT: specifies the SPI interrupt pending bit to clear.
         *   This function clears only CRCERR interrupt pending bit.
         * @note
         *   - OVR (OverRun Error) interrupt pending bit is cleared by software
         *     sequence: a read operation to SPI_DR register (SPI_I2S_ReceiveData())
         *     followed by a read operation to SPI_SR register (SPI_I2S_GetITStatus()).
         *   - UDR (UnderRun Error) interrupt pending bit is cleared by a read
         *     operation to SPI_SR register (SPI_I2S_GetITStatus()).
         *   - MODF (Mode Fault) interrupt pending bit is cleared by software sequence:
         *     a read/write operation to SPI_SR register (SPI_I2S_GetITStatus())
         *     followed by a write operation to SPI_CR1 register (SPI_Cmd() to enable
         *     the SPI).
         * @retval None
         */
       void SPI_I2S_ClearITPendingBit(SPI_TypeDef* SPIx, uint8_t SPI_I2S_IT)
+      {
         uint16_t itpos = 0;
         /* Check the parameters */
         assert_param(IS_SPI_ALL_PERIPH(SPIx));
         assert_param(IS_SPI_I2S_CLEAR_IT(SPI_I2S_IT));
         /* Get the SPI IT index */
         itpos = 0x01 << (SPI_I2S_IT & 0x0F);
         /* Clear the selected SPI CRC Error (CRCERR) interrupt pending bit */
         SPIx->SR = (uint16_t)~itpos;
+      }
       /**
         * @}
         */
       /**
         * @}
         */
       /**
         * @}
         */
       /******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/