diff options
Diffstat (limited to 'stm32lib/src/stm32f10x_spi.c')
| -rw-r--r-- | stm32lib/src/stm32f10x_spi.c | 863 |
1 files changed, 863 insertions, 0 deletions
diff --git a/stm32lib/src/stm32f10x_spi.c b/stm32lib/src/stm32f10x_spi.c new file mode 100644 index 0000000..d914c09 --- /dev/null +++ b/stm32lib/src/stm32f10x_spi.c @@ -0,0 +1,863 @@ +/******************** (C) COPYRIGHT 2008 STMicroelectronics ********************
+* File Name : stm32f10x_spi.c
+* Author : MCD Application Team
+* Version : V2.0.2
+* Date : 07/11/2008
+* Description : This file provides all the SPI firmware functions.
+********************************************************************************
+* 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.
+*******************************************************************************/
+
+/* Includes ------------------------------------------------------------------*/
+#include "stm32f10x_spi.h"
+#include "stm32f10x_rcc.h"
+
+/* Private typedef -----------------------------------------------------------*/
+/* Private define ------------------------------------------------------------*/
+/* SPI SPE mask */
+#define CR1_SPE_Set ((u16)0x0040)
+#define CR1_SPE_Reset ((u16)0xFFBF)
+
+/* I2S I2SE mask */
+#define I2SCFGR_I2SE_Set ((u16)0x0400)
+#define I2SCFGR_I2SE_Reset ((u16)0xFBFF)
+
+/* SPI CRCNext mask */
+#define CR1_CRCNext_Set ((u16)0x1000)
+
+/* SPI CRCEN mask */
+#define CR1_CRCEN_Set ((u16)0x2000)
+#define CR1_CRCEN_Reset ((u16)0xDFFF)
+
+/* SPI SSOE mask */
+#define CR2_SSOE_Set ((u16)0x0004)
+#define CR2_SSOE_Reset ((u16)0xFFFB)
+
+/* SPI registers Masks */
+#define CR1_CLEAR_Mask ((u16)0x3040)
+#define I2SCFGR_CLEAR_Mask ((u16)0xF040)
+
+/* SPI or I2S mode selection masks */
+#define SPI_Mode_Select ((u16)0xF7FF)
+#define I2S_Mode_Select ((u16)0x0800)
+
+/* Private macro -------------------------------------------------------------*/
+/* Private variables ---------------------------------------------------------*/
+/* Private function prototypes -----------------------------------------------*/
+/* Private functions ---------------------------------------------------------*/
+
+/*******************************************************************************
+* Function Name : SPI_I2S_DeInit
+* Description : Deinitializes the SPIx peripheral registers to their default
+* reset values (Affects also the I2Ss).
+* Input : - SPIx: where x can be 1, 2 or 3 to select the SPI peripheral.
+* Output : None
+* Return : None
+*******************************************************************************/
+void SPI_I2S_DeInit(SPI_TypeDef* SPIx)
+{
+ /* Check the parameters */
+ assert_param(IS_SPI_ALL_PERIPH(SPIx));
+
+ switch (*(u32*)&SPIx)
+ {
+ case SPI1_BASE:
+ /* Enable SPI1 reset state */
+ RCC_APB2PeriphResetCmd(RCC_APB2Periph_SPI1, ENABLE);
+ /* Release SPI1 from reset state */
+ RCC_APB2PeriphResetCmd(RCC_APB2Periph_SPI1, DISABLE);
+ break;
+
+ case SPI2_BASE:
+ /* Enable SPI2 reset state */
+ RCC_APB1PeriphResetCmd(RCC_APB1Periph_SPI2, ENABLE);
+ /* Release SPI2 from reset state */
+ RCC_APB1PeriphResetCmd(RCC_APB1Periph_SPI2, DISABLE);
+ break;
+
+ case SPI3_BASE:
+ /* Enable SPI3 reset state */
+ RCC_APB1PeriphResetCmd(RCC_APB1Periph_SPI3, ENABLE);
+ /* Release SPI3 from reset state */
+ RCC_APB1PeriphResetCmd(RCC_APB1Periph_SPI3, DISABLE);
+ break;
+
+ default:
+ break;
+ }
+}
+
+/*******************************************************************************
+* Function Name : SPI_Init
+* Description : Initializes the SPIx peripheral according to the specified
+* parameters in the SPI_InitStruct.
+* Input : - SPIx: where x can be 1, 2 or 3 to select the SPI peripheral.
+* - SPI_InitStruct: pointer to a SPI_InitTypeDef structure that
+* contains the configuration information for the specified
+* SPI peripheral.
+* Output : None
+* Return : None
+******************************************************************************/
+void SPI_Init(SPI_TypeDef* SPIx, SPI_InitTypeDef* SPI_InitStruct)
+{
+ u16 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 |= (u16)((u32)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;
+}
+
+/*******************************************************************************
+* Function Name : I2S_Init
+* Description : Initializes the SPIx peripheral according to the specified
+* parameters in the I2S_InitStruct.
+* Input : - SPIx: where x can be 2 or 3 to select the SPI peripheral
+* (configured in I2S mode).
+* - I2S_InitStruct: pointer to an I2S_InitTypeDef structure that
+* contains the configuration information for the specified
+* SPI peripheral configured in I2S mode.
+* Output : None
+* Return : None
+******************************************************************************/
+void I2S_Init(SPI_TypeDef* SPIx, I2S_InitTypeDef* I2S_InitStruct)
+{
+ u16 tmpreg = 0, i2sdiv = 2, i2sodd = 0, packetlength = 1;
+ u32 tmp = 0;
+ RCC_ClocksTypeDef RCC_Clocks;
+
+ /* 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 = (u16)0;
+ i2sdiv = (u16)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 System Clock frequency */
+ RCC_GetClocksFreq(&RCC_Clocks);
+
+ /* Compute the Real divider depending on the MCLK output state with a flaoting point */
+ if(I2S_InitStruct->I2S_MCLKOutput == I2S_MCLKOutput_Enable)
+ {
+ /* MCLK output is enabled */
+ tmp = (u16)(((10 * RCC_Clocks.SYSCLK_Frequency) / (256 * I2S_InitStruct->I2S_AudioFreq)) + 5);
+ }
+ else
+ {
+ /* MCLK output is disabled */
+ tmp = (u16)(((10 * RCC_Clocks.SYSCLK_Frequency) / (32 * packetlength * I2S_InitStruct->I2S_AudioFreq)) + 5);
+ }
+
+ /* Remove the flaoting point */
+ tmp = tmp/10;
+
+ /* Check the parity of the divider */
+ i2sodd = (u16)(tmp & (u16)0x0001);
+
+ /* Compute the i2sdiv prescaler */
+ i2sdiv = (u16)((tmp - i2sodd) / 2);
+
+ /* Get the Mask for the Odd bit (SPI_I2SPR[8]) register */
+ i2sodd = (u16) (i2sodd << 8);
+ }
+
+ /* Test if the divider is 1 or 0 */
+ if ((i2sdiv < 2) || (i2sdiv > 0xFF))
+ {
+ /* Set the default values */
+ i2sdiv = 2;
+ i2sodd = 0;
+ }
+
+ /* Write to SPIx I2SPR register the computed value */
+ SPIx->I2SPR = (u16)(i2sdiv | i2sodd | I2S_InitStruct->I2S_MCLKOutput);
+
+ /* Configure the I2S with the SPI_InitStruct values */
+ tmpreg |= (u16)(I2S_Mode_Select | I2S_InitStruct->I2S_Mode | \
+ I2S_InitStruct->I2S_Standard | I2S_InitStruct->I2S_DataFormat | \
+ I2S_InitStruct->I2S_CPOL);
+
+ /* Write to SPIx I2SCFGR */
+ SPIx->I2SCFGR = tmpreg;
+}
+
+/*******************************************************************************
+* Function Name : SPI_StructInit
+* Description : Fills each SPI_InitStruct member with its default value.
+* Input : - SPI_InitStruct : pointer to a SPI_InitTypeDef structure
+* which will be initialized.
+* Output : None
+* Return : 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;
+}
+
+/*******************************************************************************
+* Function Name : I2S_StructInit
+* Description : Fills each I2S_InitStruct member with its default value.
+* Input : - I2S_InitStruct : pointer to a I2S_InitTypeDef structure
+* which will be initialized.
+* Output : None
+* Return : 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;
+}
+
+/*******************************************************************************
+* Function Name : SPI_Cmd
+* Description : Enables or disables the specified SPI peripheral.
+* Input : - SPIx: where x can be 1, 2 or 3 to select the SPI peripheral.
+* - NewState: new state of the SPIx peripheral.
+* This parameter can be: ENABLE or DISABLE.
+* Output : None
+* Return : 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;
+ }
+}
+
+/*******************************************************************************
+* Function Name : I2S_Cmd
+* Description : Enables or disables the specified SPI peripheral (in I2S mode).
+* Input : - SPIx: where x can be 2 or 3 to select the SPI peripheral.
+* - NewState: new state of the SPIx peripheral.
+* This parameter can be: ENABLE or DISABLE.
+* Output : None
+* Return : 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;
+ }
+}
+
+/*******************************************************************************
+* Function Name : SPI_I2S_ITConfig
+* Description : Enables or disables the specified SPI/I2S interrupts.
+* Input : - SPIx: where x can be :
+* - 1, 2 or 3 in SPI mode
+* - 2 or 3 in I2S mode
+* - SPI_I2S_IT: specifies the SPI/I2S interrupt source to be
+* enabled or disabled.
+* This parameter can be one of the following values:
+* - SPI_I2S_IT_TXE: Tx buffer empty interrupt mask
+* - SPI_I2S_IT_RXNE: Rx buffer not empty interrupt mask
+* - SPI_I2S_IT_ERR: Error interrupt mask
+* - NewState: new state of the specified SPI/I2S interrupt.
+* This parameter can be: ENABLE or DISABLE.
+* Output : None
+* Return : None
+*******************************************************************************/
+void SPI_I2S_ITConfig(SPI_TypeDef* SPIx, u8 SPI_I2S_IT, FunctionalState NewState)
+{
+ u16 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 = (u16)((u16)1 << itpos);
+
+ if (NewState != DISABLE)
+ {
+ /* Enable the selected SPI/I2S interrupt */
+ SPIx->CR2 |= itmask;
+ }
+ else
+ {
+ /* Disable the selected SPI/I2S interrupt */
+ SPIx->CR2 &= (u16)~itmask;
+ }
+}
+
+/*******************************************************************************
+* Function Name : SPI_I2S_DMACmd
+* Description : Enables or disables the SPIx/I2Sx DMA interface.
+* Input : - SPIx: where x can be :
+* - 1, 2 or 3 in SPI mode
+* - 2 or 3 in I2S mode
+* - 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:
+* - SPI_I2S_DMAReq_Tx: Tx buffer DMA transfer request
+* - SPI_I2S_DMAReq_Rx: Rx buffer DMA transfer request
+* - NewState: new state of the selected SPI/I2S DMA transfer
+* request.
+* This parameter can be: ENABLE or DISABLE.
+* Output : None
+* Return : None
+*******************************************************************************/
+void SPI_I2S_DMACmd(SPI_TypeDef* SPIx, u16 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 &= (u16)~SPI_I2S_DMAReq;
+ }
+}
+
+/*******************************************************************************
+* Function Name : SPI_I2S_SendData
+* Description : Transmits a Data through the SPIx/I2Sx peripheral.
+* Input : - SPIx: where x can be :
+* - 1, 2 or 3 in SPI mode
+* - 2 or 3 in I2S mode
+* - Data : Data to be transmitted..
+* Output : None
+* Return : None
+*******************************************************************************/
+void SPI_I2S_SendData(SPI_TypeDef* SPIx, u16 Data)
+{
+ /* Check the parameters */
+ assert_param(IS_SPI_ALL_PERIPH(SPIx));
+
+ /* Write in the DR register the data to be sent */
+ SPIx->DR = Data;
+}
+
+/*******************************************************************************
+* Function Name : SPI_I2S_ReceiveData
+* Description : Returns the most recent received data by the SPIx/I2Sx peripheral.
+* Input : - SPIx: where x can be :
+* - 1, 2 or 3 in SPI mode
+* - 2 or 3 in I2S mode
+* Output : None
+* Return : The value of the received data.
+*******************************************************************************/
+u16 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;
+}
+
+/*******************************************************************************
+* Function Name : SPI_NSSInternalSoftwareConfig
+* Description : Configures internally by software the NSS pin for the selected
+* SPI.
+* Input : - SPIx: where x can be 1, 2 or 3 to select the SPI peripheral.
+* - SPI_NSSInternalSoft: specifies the SPI NSS internal state.
+* This parameter can be one of the following values:
+* - SPI_NSSInternalSoft_Set: Set NSS pin internally
+* - SPI_NSSInternalSoft_Reset: Reset NSS pin internally
+* Output : None
+* Return : None
+*******************************************************************************/
+void SPI_NSSInternalSoftwareConfig(SPI_TypeDef* SPIx, u16 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;
+ }
+}
+
+/*******************************************************************************
+* Function Name : SPI_SSOutputCmd
+* Description : Enables or disables the SS output for the selected SPI.
+* Input : - SPIx: where x can be 1, 2 or 3 to select the SPI peripheral.
+* - NewState: new state of the SPIx SS output.
+* This parameter can be: ENABLE or DISABLE.
+* Output : None
+* Return : 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;
+ }
+}
+
+/*******************************************************************************
+* Function Name : SPI_DataSizeConfig
+* Description : Configures the data size for the selected SPI.
+* Input : - SPIx: where x can be 1, 2 or 3 to select the SPI peripheral.
+* - SPI_DataSize: specifies the SPI data size.
+* This parameter can be one of the following values:
+* - SPI_DataSize_16b: Set data frame format to 16bit
+* - SPI_DataSize_8b: Set data frame format to 8bit
+* Output : None
+* Return : None
+*******************************************************************************/
+void SPI_DataSizeConfig(SPI_TypeDef* SPIx, u16 SPI_DataSize)
+{
+ /* Check the parameters */
+ assert_param(IS_SPI_ALL_PERIPH(SPIx));
+ assert_param(IS_SPI_DATASIZE(SPI_DataSize));
+
+ /* Clear DFF bit */
+ SPIx->CR1 &= (u16)~SPI_DataSize_16b;
+ /* Set new DFF bit value */
+ SPIx->CR1 |= SPI_DataSize;
+}
+
+/*******************************************************************************
+* Function Name : SPI_TransmitCRC
+* Description : Transmit the SPIx CRC value.
+* Input : - SPIx: where x can be 1, 2 or 3 to select the SPI peripheral.
+* Output : None
+* Return : 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;
+}
+
+/*******************************************************************************
+* Function Name : SPI_CalculateCRC
+* Description : Enables or disables the CRC value calculation of the
+* transfered bytes.
+* Input : - SPIx: where x can be 1, 2 or 3 to select the SPI peripheral.
+* - NewState: new state of the SPIx CRC value calculation.
+* This parameter can be: ENABLE or DISABLE.
+* Output : None
+* Return : 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;
+ }
+}
+
+/*******************************************************************************
+* Function Name : SPI_GetCRC
+* Description : Returns the transmit or the receive CRC register value for
+* the specified SPI.
+* Input : - SPIx: where x can be 1, 2 or 3 to select the SPI peripheral.
+* - SPI_CRC: specifies the CRC register to be read.
+* This parameter can be one of the following values:
+* - SPI_CRC_Tx: Selects Tx CRC register
+* - SPI_CRC_Rx: Selects Rx CRC register
+* Output : None
+* Return : The selected CRC register value..
+*******************************************************************************/
+u16 SPI_GetCRC(SPI_TypeDef* SPIx, u8 SPI_CRC)
+{
+ u16 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;
+}
+
+/*******************************************************************************
+* Function Name : SPI_GetCRCPolynomial
+* Description : Returns the CRC Polynomial register value for the specified SPI.
+* Input : - SPIx: where x can be 1, 2 or 3 to select the SPI peripheral.
+* Output : None
+* Return : The CRC Polynomial register value.
+*******************************************************************************/
+u16 SPI_GetCRCPolynomial(SPI_TypeDef* SPIx)
+{
+ /* Check the parameters */
+ assert_param(IS_SPI_ALL_PERIPH(SPIx));
+
+ /* Return the CRC polynomial register */
+ return SPIx->CRCPR;
+}
+
+/*******************************************************************************
+* Function Name : SPI_BiDirectionalLineConfig
+* Description : Selects the data transfer direction in bi-directional mode
+* for the specified SPI.
+* Input : - SPIx: where x can be 1, 2 or 3 to select the SPI peripheral.
+* - SPI_Direction: specifies the data transfer direction in
+* bi-directional mode.
+* This parameter can be one of the following values:
+* - SPI_Direction_Tx: Selects Tx transmission direction
+* - SPI_Direction_Rx: Selects Rx receive direction
+* Output : None
+* Return : None
+*******************************************************************************/
+void SPI_BiDirectionalLineConfig(SPI_TypeDef* SPIx, u16 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;
+ }
+}
+
+/*******************************************************************************
+* Function Name : SPI_I2S_GetFlagStatus
+* Description : Checks whether the specified SPI/I2S flag is set or not.
+* Input : - SPIx: where x can be :
+* - 1, 2 or 3 in SPI mode
+* - 2 or 3 in I2S mode
+* - SPI_I2S_FLAG: specifies the SPI/I2S flag to check.
+* This parameter can be one of the following values:
+* - SPI_I2S_FLAG_TXE: Transmit buffer empty flag.
+* - SPI_I2S_FLAG_RXNE: Receive buffer not empty flag.
+* - SPI_I2S_FLAG_BSY: Busy flag.
+* - SPI_I2S_FLAG_OVR: Overrun flag.
+* - SPI_FLAG_MODF: Mode Fault flag.
+* - SPI_FLAG_CRCERR: CRC Error flag.
+* - I2S_FLAG_UDR: Underrun Error flag.
+* - I2S_FLAG_CHSIDE: Channel Side flag.
+* Output : None
+* Return : The new state of SPI_I2S_FLAG (SET or RESET).
+*******************************************************************************/
+FlagStatus SPI_I2S_GetFlagStatus(SPI_TypeDef* SPIx, u16 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) != (u16)RESET)
+ {
+ /* SPI_I2S_FLAG is set */
+ bitstatus = SET;
+ }
+ else
+ {
+ /* SPI_I2S_FLAG is reset */
+ bitstatus = RESET;
+ }
+ /* Return the SPI_I2S_FLAG status */
+ return bitstatus;
+}
+
+/*******************************************************************************
+* Function Name : SPI_I2S_ClearFlag
+* Description : Clears the SPIx CRC Error (CRCERR) flag.
+* Input : - SPIx: where x can be :
+* - 1, 2 or 3 in SPI mode
+* - SPI_I2S_FLAG: specifies the SPI flag to clear.
+* This function clears only CRCERR flag.
+* Notes:
+* - 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).
+* Output : None
+* Return : None
+*******************************************************************************/
+void SPI_I2S_ClearFlag(SPI_TypeDef* SPIx, u16 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 = (u16)~SPI_I2S_FLAG;
+}
+
+/*******************************************************************************
+* Function Name : SPI_I2S_GetITStatus
+* Description : Checks whether the specified SPI/I2S interrupt has occurred or not.
+* Input : - SPIx: where x can be :
+* - 1, 2 or 3 in SPI mode
+* - 2 or 3 in I2S mode
+* - SPI_I2S_IT: specifies the SPI/I2S interrupt source to check.
+* This parameter can be one of the following values:
+* - SPI_I2S_IT_TXE: Transmit buffer empty interrupt.
+* - SPI_I2S_IT_RXNE: Receive buffer not empty interrupt.
+* - SPI_I2S_IT_OVR: Overrun interrupt.
+* - SPI_IT_MODF: Mode Fault interrupt.
+* - SPI_IT_CRCERR: CRC Error interrupt.
+* - I2S_IT_UDR: Underrun Error interrupt.
+* Output : None
+* Return : The new state of SPI_I2S_IT (SET or RESET).
+*******************************************************************************/
+ITStatus SPI_I2S_GetITStatus(SPI_TypeDef* SPIx, u8 SPI_I2S_IT)
+{
+ ITStatus bitstatus = RESET;
+ u16 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 = (u16)((u16)0x01 << (SPI_I2S_IT & (u8)0x0F));
+
+ /* Get the SPI/I2S IT mask */
+ itmask = SPI_I2S_IT >> 4;
+ /* Set the IT mask */
+ itmask = (u16)((u16)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) != (u16)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;
+}
+
+/*******************************************************************************
+* Function Name : SPI_I2S_ClearITPendingBit
+* Description : Clears the SPIx CRC Error (CRCERR) interrupt pending bit.
+* Input : - SPIx: where x can be :
+* - 1, 2 or 3 in SPI mode
+* - SPI_I2S_IT: specifies the SPI interrupt pending bit to clear.
+* This function clears only CRCERR intetrrupt pending bit.
+* Notes:
+* - 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).
+* Output : None
+* Return : None
+*******************************************************************************/
+void SPI_I2S_ClearITPendingBit(SPI_TypeDef* SPIx, u8 SPI_I2S_IT)
+{
+ u16 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 = (u16)((u16)0x01 << (SPI_I2S_IT & (u8)0x0F));
+ /* Clear the selected SPI CRC Error (CRCERR) interrupt pending bit */
+ SPIx->SR = (u16)~itpos;
+}
+
+/******************* (C) COPYRIGHT 2008 STMicroelectronics *****END OF FILE****/
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