diff options
Diffstat (limited to 'stm32lib/src/stm32f10x_spi.c')
| -rw-r--r-- | stm32lib/src/stm32f10x_spi.c | 863 |
1 files changed, 0 insertions, 863 deletions
diff --git a/stm32lib/src/stm32f10x_spi.c b/stm32lib/src/stm32f10x_spi.c deleted file mode 100644 index d914c09..0000000 --- a/stm32lib/src/stm32f10x_spi.c +++ /dev/null @@ -1,863 +0,0 @@ -/******************** (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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