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Diffstat (limited to 'stm/lib/stm32f4xx_spi.c')
| -rw-r--r-- | stm/lib/stm32f4xx_spi.c | 1312 |
1 files changed, 0 insertions, 1312 deletions
diff --git a/stm/lib/stm32f4xx_spi.c b/stm/lib/stm32f4xx_spi.c deleted file mode 100644 index eb725f46ee..0000000000 --- a/stm/lib/stm32f4xx_spi.c +++ /dev/null @@ -1,1312 +0,0 @@ -/**
- ******************************************************************************
- * @file stm32f4xx_spi.c
- * @author MCD Application Team
- * @version V1.3.0
- * @date 08-November-2013
- * @brief This file provides firmware functions to manage the following
- * functionalities of the Serial peripheral interface (SPI):
- * + Initialization and Configuration
- * + Data transfers functions
- * + Hardware CRC Calculation
- * + DMA transfers management
- * + Interrupts and flags management
- *
-@verbatim
-
- ===================================================================
- ##### How to use this driver #####
- ===================================================================
- [..]
- (#) Enable peripheral clock using the following functions
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1, ENABLE) for SPI1
- RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2, ENABLE) for SPI2
- RCC_APB1PeriphResetCmd(RCC_APB1Periph_SPI3, ENABLE) for SPI3
- RCC_APB1PeriphResetCmd(RCC_APB1Periph_SPI3, ENABLE) for SPI4
- RCC_APB1PeriphResetCmd(RCC_APB1Periph_SPI3, ENABLE) for SPI5
- RCC_APB1PeriphResetCmd(RCC_APB1Periph_SPI3, ENABLE) for SPI6.
-
- (#) Enable SCK, MOSI, MISO and NSS GPIO clocks using RCC_AHB1PeriphClockCmd()
- function. In I2S mode, if an external clock source is used then the I2S
- CKIN pin GPIO clock should also be enabled.
-
- (#) Peripherals alternate function:
- (++) Connect the pin to the desired peripherals' Alternate Function (AF)
- using GPIO_PinAFConfig() function
- (++) Configure the desired pin in alternate function by:
- GPIO_InitStruct->GPIO_Mode = GPIO_Mode_AF
- (++) Select the type, pull-up/pull-down and output speed via GPIO_PuPd,
- GPIO_OType and GPIO_Speed members
- (++) Call GPIO_Init() function In I2S mode, if an external clock source is
- used then the I2S CKIN pin should be also configured in Alternate
- function Push-pull pull-up mode.
-
- (#) Program the Polarity, Phase, First Data, Baud Rate Prescaler, Slave
- Management, Peripheral Mode and CRC Polynomial values using the SPI_Init()
- function.
- In I2S mode, program the Mode, Standard, Data Format, MCLK Output, Audio
- frequency and Polarity using I2S_Init() function. For I2S mode, make sure
- that either:
- (++) I2S PLL is configured using the functions
- RCC_I2SCLKConfig(RCC_I2S2CLKSource_PLLI2S), RCC_PLLI2SCmd(ENABLE) and
- RCC_GetFlagStatus(RCC_FLAG_PLLI2SRDY); or
- (++) External clock source is configured using the function
- RCC_I2SCLKConfig(RCC_I2S2CLKSource_Ext) and after setting correctly
- the define constant I2S_EXTERNAL_CLOCK_VAL in the stm32f4xx_conf.h file.
-
- (#) Enable the NVIC and the corresponding interrupt using the function
- SPI_ITConfig() if you need to use interrupt mode.
-
- (#) When using the DMA mode
- (++) Configure the DMA using DMA_Init() function
- (++) Active the needed channel Request using SPI_I2S_DMACmd() function
-
- (#) Enable the SPI using the SPI_Cmd() function or enable the I2S using
- I2S_Cmd().
-
- (#) Enable the DMA using the DMA_Cmd() function when using DMA mode.
-
- (#) Optionally, you can enable/configure the following parameters without
- re-initialization (i.e there is no need to call again SPI_Init() function):
- (++) When bidirectional mode (SPI_Direction_1Line_Rx or SPI_Direction_1Line_Tx)
- is programmed as Data direction parameter using the SPI_Init() function
- it can be possible to switch between SPI_Direction_Tx or SPI_Direction_Rx
- using the SPI_BiDirectionalLineConfig() function.
- (++) When SPI_NSS_Soft is selected as Slave Select Management parameter
- using the SPI_Init() function it can be possible to manage the
- NSS internal signal using the SPI_NSSInternalSoftwareConfig() function.
- (++) Reconfigure the data size using the SPI_DataSizeConfig() function
- (++) Enable or disable the SS output using the SPI_SSOutputCmd() function
-
- (#) To use the CRC Hardware calculation feature refer to the Peripheral
- CRC hardware Calculation subsection.
-
-
- [..] It is possible to use SPI in I2S full duplex mode, in this case, each SPI
- peripheral is able to manage sending and receiving data simultaneously
- using two data lines. Each SPI peripheral has an extended block called I2Sxext
- (ie. I2S2ext for SPI2 and I2S3ext for SPI3).
- The extension block is not a full SPI IP, it is used only as I2S slave to
- implement full duplex mode. The extension block uses the same clock sources
- as its master.
- To configure I2S full duplex you have to:
-
- (#) Configure SPIx in I2S mode (I2S_Init() function) as described above.
-
- (#) Call the I2S_FullDuplexConfig() function using the same strucutre passed to
- I2S_Init() function.
-
- (#) Call I2S_Cmd() for SPIx then for its extended block.
-
- (#) To configure interrupts or DMA requests and to get/clear flag status,
- use I2Sxext instance for the extension block.
-
- [..] Functions that can be called with I2Sxext instances are: I2S_Cmd(),
- I2S_FullDuplexConfig(), SPI_I2S_ReceiveData(), SPI_I2S_SendData(),
- SPI_I2S_DMACmd(), SPI_I2S_ITConfig(), SPI_I2S_GetFlagStatus(),
- SPI_I2S_ClearFlag(), SPI_I2S_GetITStatus() and SPI_I2S_ClearITPendingBit().
-
- Example: To use SPI3 in Full duplex mode (SPI3 is Master Tx, I2S3ext is Slave Rx):
-
- RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI3, ENABLE);
- I2S_StructInit(&I2SInitStruct);
- I2SInitStruct.Mode = I2S_Mode_MasterTx;
- I2S_Init(SPI3, &I2SInitStruct);
- I2S_FullDuplexConfig(SPI3ext, &I2SInitStruct)
- I2S_Cmd(SPI3, ENABLE);
- I2S_Cmd(SPI3ext, ENABLE);
- ...
- while (SPI_I2S_GetFlagStatus(SPI2, SPI_FLAG_TXE) == RESET)
- {}
- SPI_I2S_SendData(SPI3, txdata[i]);
- ...
- while (SPI_I2S_GetFlagStatus(I2S3ext, SPI_FLAG_RXNE) == RESET)
- {}
- rxdata[i] = SPI_I2S_ReceiveData(I2S3ext);
- ...
-
- [..]
- (@) In I2S mode: if an external clock is used as source clock for the I2S,
- then the define I2S_EXTERNAL_CLOCK_VAL in file stm32f4xx_conf.h should
- be enabled and set to the value of the source clock frequency (in Hz).
-
- (@) In SPI mode: To use the SPI TI mode, call the function SPI_TIModeCmd()
- just after calling the function SPI_Init().
-
-@endverbatim
- *
- ******************************************************************************
- * @attention
- *
- * <h2><center>© COPYRIGHT 2013 STMicroelectronics</center></h2>
- *
- * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
- * You may not use this file except in compliance with the License.
- * You may obtain a copy of the License at:
- *
- * http://www.st.com/software_license_agreement_liberty_v2
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
- ******************************************************************************
- */
-
-/* Includes ------------------------------------------------------------------*/
-#include "stm32f4xx_spi.h"
-#include "stm32f4xx_rcc.h"
-
-/** @addtogroup STM32F4xx_StdPeriph_Driver
- * @{
- */
-
-/** @defgroup SPI
- * @brief SPI driver modules
- * @{
- */
-
-/* Private typedef -----------------------------------------------------------*/
-/* Private define ------------------------------------------------------------*/
-
-/* SPI registers Masks */
-#define CR1_CLEAR_MASK ((uint16_t)0x3040)
-#define I2SCFGR_CLEAR_MASK ((uint16_t)0xF040)
-
-/* RCC PLLs masks */
-#define PLLCFGR_PPLR_MASK ((uint32_t)0x70000000)
-#define PLLCFGR_PPLN_MASK ((uint32_t)0x00007FC0)
-
-#define SPI_CR2_FRF ((uint16_t)0x0010)
-#define SPI_SR_TIFRFE ((uint16_t)0x0100)
-
-/* Private macro -------------------------------------------------------------*/
-/* Private variables ---------------------------------------------------------*/
-/* Private function prototypes -----------------------------------------------*/
-/* Private functions ---------------------------------------------------------*/
-
-/** @defgroup SPI_Private_Functions
- * @{
- */
-
-/** @defgroup SPI_Group1 Initialization and Configuration functions
- * @brief Initialization and Configuration functions
- *
-@verbatim
- ===============================================================================
- ##### Initialization and Configuration functions #####
- ===============================================================================
- [..] This section provides a set of functions allowing to initialize the SPI
- Direction, SPI Mode, SPI Data Size, SPI Polarity, SPI Phase, SPI NSS
- Management, SPI Baud Rate Prescaler, SPI First Bit and SPI CRC Polynomial.
-
- [..] The SPI_Init() function follows the SPI configuration procedures for Master
- mode and Slave mode (details for these procedures are available in reference
- manual (RM0090)).
-
-@endverbatim
- * @{
- */
-
-/**
- * @brief De-initialize the SPIx peripheral registers to their default reset values.
- * @param SPIx: To select the SPIx/I2Sx peripheral, where x can be: 1, 2, 3, 4, 5 or 6
- * in SPI mode or 2 or 3 in I2S mode.
- *
- * @note The extended I2S blocks (ie. I2S2ext and I2S3ext blocks) are de-initialized
- * when the relative I2S peripheral is de-initialized (the extended block's clock
- * is managed by the I2S peripheral clock).
- *
- * @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);
- }
- else if (SPIx == SPI4)
- {
- /* Enable SPI4 reset state */
- RCC_APB2PeriphResetCmd(RCC_APB2Periph_SPI4, ENABLE);
- /* Release SPI4 from reset state */
- RCC_APB2PeriphResetCmd(RCC_APB2Periph_SPI4, DISABLE);
- }
- else if (SPIx == SPI5)
- {
- /* Enable SPI5 reset state */
- RCC_APB2PeriphResetCmd(RCC_APB2Periph_SPI5, ENABLE);
- /* Release SPI5 from reset state */
- RCC_APB2PeriphResetCmd(RCC_APB2Periph_SPI5, DISABLE);
- }
- else
- {
- if (SPIx == SPI6)
- {
- /* Enable SPI6 reset state */
- RCC_APB2PeriphResetCmd(RCC_APB2Periph_SPI6, ENABLE);
- /* Release SPI6 from reset state */
- RCC_APB2PeriphResetCmd(RCC_APB2Periph_SPI6, DISABLE);
- }
- }
-}
-
-/**
- * @brief Initializes the SPIx peripheral according to the specified
- * parameters in the SPI_InitStruct.
- * @param SPIx: where x can be 1, 2, 3, 4, 5 or 6 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 &= (uint16_t)~((uint16_t)SPI_I2SCFGR_I2SMOD);
-/*---------------------------- 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.
- *
- * @note if an external clock is used as source clock for the I2S, then the define
- * I2S_EXTERNAL_CLOCK_VAL in file stm32f4xx_conf.h should be enabled and set
- * to the value of the the source clock frequency (in Hz).
- *
- * @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, i2sclk = 0;
-#ifndef I2S_EXTERNAL_CLOCK_VAL
- uint32_t pllm = 0, plln = 0, pllr = 0;
-#endif /* I2S_EXTERNAL_CLOCK_VAL */
-
- /* 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 I2S source Clock frequency ****************************************/
-
- /* If an external I2S clock has to be used, this define should be set
- in the project configuration or in the stm32f4xx_conf.h file */
- #ifdef I2S_EXTERNAL_CLOCK_VAL
- /* Set external clock as I2S clock source */
- if ((RCC->CFGR & RCC_CFGR_I2SSRC) == 0)
- {
- RCC->CFGR |= (uint32_t)RCC_CFGR_I2SSRC;
- }
-
- /* Set the I2S clock to the external clock value */
- i2sclk = I2S_EXTERNAL_CLOCK_VAL;
-
- #else /* There is no define for External I2S clock source */
- /* Set PLLI2S as I2S clock source */
- if ((RCC->CFGR & RCC_CFGR_I2SSRC) != 0)
- {
- RCC->CFGR &= ~(uint32_t)RCC_CFGR_I2SSRC;
- }
-
- /* Get the PLLI2SN value */
- plln = (uint32_t)(((RCC->PLLI2SCFGR & RCC_PLLI2SCFGR_PLLI2SN) >> 6) & \
- (RCC_PLLI2SCFGR_PLLI2SN >> 6));
-
- /* Get the PLLI2SR value */
- pllr = (uint32_t)(((RCC->PLLI2SCFGR & RCC_PLLI2SCFGR_PLLI2SR) >> 28) & \
- (RCC_PLLI2SCFGR_PLLI2SR >> 28));
-
- /* Get the PLLM value */
- pllm = (uint32_t)(RCC->PLLCFGR & RCC_PLLCFGR_PLLM);
-
- /* Get the I2S source clock value */
- i2sclk = (uint32_t)(((HSE_VALUE / pllm) * plln) / pllr);
- #endif /* I2S_EXTERNAL_CLOCK_VAL */
-
- /* 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)(((((i2sclk / 256) * 10) / I2S_InitStruct->I2S_AudioFreq)) + 5);
- }
- else
- {
- /* MCLK output is disabled */
- tmp = (uint16_t)(((((i2sclk / (32 * packetlength)) *10 ) / I2S_InitStruct->I2S_AudioFreq)) + 5);
- }
-
- /* Remove the flatting 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)((uint16_t)i2sdiv | (uint16_t)(i2sodd | (uint16_t)I2S_InitStruct->I2S_MCLKOutput));
-
- /* Configure the I2S with the SPI_InitStruct values */
- tmpreg |= (uint16_t)((uint16_t)SPI_I2SCFGR_I2SMOD | (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, 3, 4, 5 or 6 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 |= SPI_CR1_SPE;
- }
- else
- {
- /* Disable the selected SPI peripheral */
- SPIx->CR1 &= (uint16_t)~((uint16_t)SPI_CR1_SPE);
- }
-}
-
-/**
- * @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 (or I2Sxext
- * for full duplex mode).
- * @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_EXT(SPIx));
- assert_param(IS_FUNCTIONAL_STATE(NewState));
-
- if (NewState != DISABLE)
- {
- /* Enable the selected SPI peripheral (in I2S mode) */
- SPIx->I2SCFGR |= SPI_I2SCFGR_I2SE;
- }
- else
- {
- /* Disable the selected SPI peripheral in I2S mode */
- SPIx->I2SCFGR &= (uint16_t)~((uint16_t)SPI_I2SCFGR_I2SE);
- }
-}
-
-/**
- * @brief Configures the data size for the selected SPI.
- * @param SPIx: where x can be 1, 2, 3, 4, 5 or 6 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 Selects the data transfer direction in bidirectional mode for the specified SPI.
- * @param SPIx: where x can be 1, 2, 3, 4, 5 or 6 to select the SPI peripheral.
- * @param SPI_Direction: specifies the data transfer direction in bidirectional 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 Configures internally by software the NSS pin for the selected SPI.
- * @param SPIx: where x can be 1, 2, 3, 4, 5 or 6 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, 3, 4, 5 or 6 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 |= (uint16_t)SPI_CR2_SSOE;
- }
- else
- {
- /* Disable the selected SPI SS output */
- SPIx->CR2 &= (uint16_t)~((uint16_t)SPI_CR2_SSOE);
- }
-}
-
-/**
- * @brief Enables or disables the SPIx/I2Sx DMA interface.
- *
- * @note This function can be called only after the SPI_Init() function has
- * been called.
- * @note When TI mode is selected, the control bits SSM, SSI, CPOL and CPHA
- * are not taken into consideration and are configured by hardware
- * respectively to the TI mode requirements.
- *
- * @param SPIx: where x can be 1, 2, 3, 4, 5 or 6
- * @param NewState: new state of the selected SPI TI communication mode.
- * This parameter can be: ENABLE or DISABLE.
- * @retval None
- */
-void SPI_TIModeCmd(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 TI mode for the selected SPI peripheral */
- SPIx->CR2 |= SPI_CR2_FRF;
- }
- else
- {
- /* Disable the TI mode for the selected SPI peripheral */
- SPIx->CR2 &= (uint16_t)~SPI_CR2_FRF;
- }
-}
-
-/**
- * @brief Configures the full duplex mode for the I2Sx peripheral using its
- * extension I2Sxext according to the specified parameters in the
- * I2S_InitStruct.
- * @param I2Sxext: where x can be 2 or 3 to select the I2S peripheral extension block.
- * @param I2S_InitStruct: pointer to an I2S_InitTypeDef structure that
- * contains the configuration information for the specified I2S peripheral
- * extension.
- *
- * @note The structure pointed by I2S_InitStruct parameter should be the same
- * used for the master I2S peripheral. In this case, if the master is
- * configured as transmitter, the slave will be receiver and vice versa.
- * Or you can force a different mode by modifying the field I2S_Mode to the
- * value I2S_SlaveRx or I2S_SlaveTx indepedently of the master configuration.
- *
- * @note The I2S full duplex extension can be configured in slave mode only.
- *
- * @retval None
- */
-void I2S_FullDuplexConfig(SPI_TypeDef* I2Sxext, I2S_InitTypeDef* I2S_InitStruct)
-{
- uint16_t tmpreg = 0, tmp = 0;
-
- /* Check the I2S parameters */
- assert_param(IS_I2S_EXT_PERIPH(I2Sxext));
- 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_CPOL(I2S_InitStruct->I2S_CPOL));
-
-/*----------------------- SPIx I2SCFGR & I2SPR Configuration -----------------*/
- /* Clear I2SMOD, I2SE, I2SCFG, PCMSYNC, I2SSTD, CKPOL, DATLEN and CHLEN bits */
- I2Sxext->I2SCFGR &= I2SCFGR_CLEAR_MASK;
- I2Sxext->I2SPR = 0x0002;
-
- /* Get the I2SCFGR register value */
- tmpreg = I2Sxext->I2SCFGR;
-
- /* Get the mode to be configured for the extended I2S */
- if ((I2S_InitStruct->I2S_Mode == I2S_Mode_MasterTx) || (I2S_InitStruct->I2S_Mode == I2S_Mode_SlaveTx))
- {
- tmp = I2S_Mode_SlaveRx;
- }
- else
- {
- if ((I2S_InitStruct->I2S_Mode == I2S_Mode_MasterRx) || (I2S_InitStruct->I2S_Mode == I2S_Mode_SlaveRx))
- {
- tmp = I2S_Mode_SlaveTx;
- }
- }
-
-
- /* Configure the I2S with the SPI_InitStruct values */
- tmpreg |= (uint16_t)((uint16_t)SPI_I2SCFGR_I2SMOD | (uint16_t)(tmp | \
- (uint16_t)(I2S_InitStruct->I2S_Standard | (uint16_t)(I2S_InitStruct->I2S_DataFormat | \
- (uint16_t)I2S_InitStruct->I2S_CPOL))));
-
- /* Write to SPIx I2SCFGR */
- I2Sxext->I2SCFGR = tmpreg;
-}
-
-/**
- * @}
- */
-
-/** @defgroup SPI_Group2 Data transfers functions
- * @brief Data transfers functions
- *
-@verbatim
- ===============================================================================
- ##### Data transfers functions #####
- ===============================================================================
-
- [..] This section provides a set of functions allowing to manage the SPI data
- transfers. In reception, data are received and then stored into an internal
- Rx buffer while. In transmission, data are first stored into an internal Tx
- buffer before being transmitted.
-
- [..] The read access of the SPI_DR register can be done using the SPI_I2S_ReceiveData()
- function and returns the Rx buffered value. Whereas a write access to the SPI_DR
- can be done using SPI_I2S_SendData() function and stores the written data into
- Tx buffer.
-
-@endverbatim
- * @{
- */
-
-/**
- * @brief Returns the most recent received data by the SPIx/I2Sx peripheral.
- * @param SPIx: To select the SPIx/I2Sx peripheral, where x can be: 1, 2, 3, 4, 5 or 6
- * in SPI mode or 2 or 3 in I2S mode or I2Sxext for I2S full duplex 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_EXT(SPIx));
-
- /* Return the data in the DR register */
- return SPIx->DR;
-}
-
-/**
- * @brief Transmits a Data through the SPIx/I2Sx peripheral.
- * @param SPIx: To select the SPIx/I2Sx peripheral, where x can be: 1, 2, 3, 4, 5 or 6
- * in SPI mode or 2 or 3 in I2S mode or I2Sxext for I2S full duplex 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_EXT(SPIx));
-
- /* Write in the DR register the data to be sent */
- SPIx->DR = Data;
-}
-
-/**
- * @}
- */
-
-/** @defgroup SPI_Group3 Hardware CRC Calculation functions
- * @brief Hardware CRC Calculation functions
- *
-@verbatim
- ===============================================================================
- ##### Hardware CRC Calculation functions #####
- ===============================================================================
-
- [..] This section provides a set of functions allowing to manage the SPI CRC hardware
- calculation
-
- [..] SPI communication using CRC is possible through the following procedure:
- (#) Program the Data direction, Polarity, Phase, First Data, Baud Rate Prescaler,
- Slave Management, Peripheral Mode and CRC Polynomial values using the SPI_Init()
- function.
- (#) Enable the CRC calculation using the SPI_CalculateCRC() function.
- (#) Enable the SPI using the SPI_Cmd() function
- (#) Before writing the last data to the TX buffer, set the CRCNext bit using the
- SPI_TransmitCRC() function to indicate that after transmission of the last
- data, the CRC should be transmitted.
- (#) After transmitting the last data, the SPI transmits the CRC. The SPI_CR1_CRCNEXT
- bit is reset. The CRC is also received and compared against the SPI_RXCRCR
- value.
- If the value does not match, the SPI_FLAG_CRCERR flag is set and an interrupt
- can be generated when the SPI_I2S_IT_ERR interrupt is enabled.
-
- [..]
- (@) It is advised not to read the calculated CRC values during the communication.
-
- (@) When the SPI is in slave mode, be careful to enable CRC calculation only
- when the clock is stable, that is, when the clock is in the steady state.
- If not, a wrong CRC calculation may be done. In fact, the CRC is sensitive
- to the SCK slave input clock as soon as CRCEN is set, and this, whatever
- the value of the SPE bit.
-
- (@) With high bitrate frequencies, be careful when transmitting the CRC.
- As the number of used CPU cycles has to be as low as possible in the CRC
- transfer phase, it is forbidden to call software functions in the CRC
- transmission sequence to avoid errors in the last data and CRC reception.
- In fact, CRCNEXT bit has to be written before the end of the transmission/reception
- of the last data.
-
- (@) For high bit rate frequencies, it is advised to use the DMA mode to avoid the
- degradation of the SPI speed performance due to CPU accesses impacting the
- SPI bandwidth.
-
- (@) When the STM32F4xx is configured as slave and the NSS hardware mode is
- used, the NSS pin needs to be kept low between the data phase and the CRC
- phase.
-
- (@) When the SPI is configured in slave mode with the CRC feature enabled, CRC
- calculation takes place even if a high level is applied on the NSS pin.
- This may happen for example in case of a multi-slave environment where the
- communication master addresses slaves alternately.
-
- (@) Between a slave de-selection (high level on NSS) and a new slave selection
- (low level on NSS), the CRC value should be cleared on both master and slave
- sides in order to resynchronize the master and slave for their respective
- CRC calculation.
-
- (@) To clear the CRC, follow the procedure below:
- (#@) Disable SPI using the SPI_Cmd() function
- (#@) Disable the CRC calculation using the SPI_CalculateCRC() function.
- (#@) Enable the CRC calculation using the SPI_CalculateCRC() function.
- (#@) Enable SPI using the SPI_Cmd() function.
-
-@endverbatim
- * @{
- */
-
-/**
- * @brief Enables or disables the CRC value calculation of the transferred bytes.
- * @param SPIx: where x can be 1, 2, 3, 4, 5 or 6 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 |= SPI_CR1_CRCEN;
- }
- else
- {
- /* Disable the selected SPI CRC calculation */
- SPIx->CR1 &= (uint16_t)~((uint16_t)SPI_CR1_CRCEN);
- }
-}
-
-/**
- * @brief Transmit the SPIx CRC value.
- * @param SPIx: where x can be 1, 2, 3, 4, 5 or 6 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 |= SPI_CR1_CRCNEXT;
-}
-
-/**
- * @brief Returns the transmit or the receive CRC register value for the specified SPI.
- * @param SPIx: where x can be 1, 2, 3, 4, 5 or 6 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, 3, 4, 5 or 6 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;
-}
-
-/**
- * @}
- */
-
-/** @defgroup SPI_Group4 DMA transfers management functions
- * @brief DMA transfers management functions
- *
-@verbatim
- ===============================================================================
- ##### DMA transfers management functions #####
- ===============================================================================
-
-@endverbatim
- * @{
- */
-
-/**
- * @brief Enables or disables the SPIx/I2Sx DMA interface.
- * @param SPIx: To select the SPIx/I2Sx peripheral, where x can be: 1, 2, 3, 4, 5 or 6
- * in SPI mode or 2 or 3 in I2S mode or I2Sxext for I2S full duplex mode.
- * @param SPI_I2S_DMAReq: specifies the SPI 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 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_EXT(SPIx));
- assert_param(IS_FUNCTIONAL_STATE(NewState));
- assert_param(IS_SPI_I2S_DMAREQ(SPI_I2S_DMAReq));
-
- if (NewState != DISABLE)
- {
- /* Enable the selected SPI DMA requests */
- SPIx->CR2 |= SPI_I2S_DMAReq;
- }
- else
- {
- /* Disable the selected SPI DMA requests */
- SPIx->CR2 &= (uint16_t)~SPI_I2S_DMAReq;
- }
-}
-
-/**
- * @}
- */
-
-/** @defgroup SPI_Group5 Interrupts and flags management functions
- * @brief Interrupts and flags management functions
- *
-@verbatim
- ===============================================================================
- ##### Interrupts and flags management functions #####
- ===============================================================================
-
- [..] This section provides a set of functions allowing to configure the SPI Interrupts
- sources and check or clear the flags or pending bits status.
- The user should identify which mode will be used in his application to manage
- the communication: Polling mode, Interrupt mode or DMA mode.
-
- *** Polling Mode ***
- ====================
-[..] In Polling Mode, the SPI/I2S communication can be managed by 9 flags:
- (#) SPI_I2S_FLAG_TXE : to indicate the status of the transmit buffer register
- (#) SPI_I2S_FLAG_RXNE : to indicate the status of the receive buffer register
- (#) SPI_I2S_FLAG_BSY : to indicate the state of the communication layer of the SPI.
- (#) SPI_FLAG_CRCERR : to indicate if a CRC Calculation error occur
- (#) SPI_FLAG_MODF : to indicate if a Mode Fault error occur
- (#) SPI_I2S_FLAG_OVR : to indicate if an Overrun error occur
- (#) I2S_FLAG_TIFRFE: to indicate a Frame Format error occurs.
- (#) I2S_FLAG_UDR: to indicate an Underrun error occurs.
- (#) I2S_FLAG_CHSIDE: to indicate Channel Side.
-
- (@) Do not use the BSY flag to handle each data transmission or reception. It is
- better to use the TXE and RXNE flags instead.
-
- [..] In this Mode it is advised to use the following functions:
- (+) FlagStatus SPI_I2S_GetFlagStatus(SPI_TypeDef* SPIx, uint16_t SPI_I2S_FLAG);
- (+) void SPI_I2S_ClearFlag(SPI_TypeDef* SPIx, uint16_t SPI_I2S_FLAG);
-
- *** Interrupt Mode ***
- ======================
- [..] In Interrupt Mode, the SPI communication can be managed by 3 interrupt sources
- and 7 pending bits:
- (+) Pending Bits:
- (##) SPI_I2S_IT_TXE : to indicate the status of the transmit buffer register
- (##) SPI_I2S_IT_RXNE : to indicate the status of the receive buffer register
- (##) SPI_IT_CRCERR : to indicate if a CRC Calculation error occur (available in SPI mode only)
- (##) SPI_IT_MODF : to indicate if a Mode Fault error occur (available in SPI mode only)
- (##) SPI_I2S_IT_OVR : to indicate if an Overrun error occur
- (##) I2S_IT_UDR : to indicate an Underrun Error occurs (available in I2S mode only).
- (##) I2S_FLAG_TIFRFE : to indicate a Frame Format error occurs (available in TI mode only).
-
- (+) Interrupt Source:
- (##) SPI_I2S_IT_TXE: specifies the interrupt source for the Tx buffer empty
- interrupt.
- (##) SPI_I2S_IT_RXNE : specifies the interrupt source for the Rx buffer not
- empty interrupt.
- (##) SPI_I2S_IT_ERR : specifies the interrupt source for the errors interrupt.
-
- [..] In this Mode it is advised to use the following functions:
- (+) void SPI_I2S_ITConfig(SPI_TypeDef* SPIx, uint8_t SPI_I2S_IT, FunctionalState NewState);
- (+) ITStatus SPI_I2S_GetITStatus(SPI_TypeDef* SPIx, uint8_t SPI_I2S_IT);
- (+) void SPI_I2S_ClearITPendingBit(SPI_TypeDef* SPIx, uint8_t SPI_I2S_IT);
-
- *** DMA Mode ***
- ================
- [..] In DMA Mode, the SPI communication can be managed by 2 DMA Channel requests:
- (#) SPI_I2S_DMAReq_Tx: specifies the Tx buffer DMA transfer request
- (#) SPI_I2S_DMAReq_Rx: specifies the Rx buffer DMA transfer request
-
- [..] In this Mode it is advised to use the following function:
- (+) void SPI_I2S_DMACmd(SPI_TypeDef* SPIx, uint16_t SPI_I2S_DMAReq, FunctionalState
- NewState);
-
-@endverbatim
- * @{
- */
-
-/**
- * @brief Enables or disables the specified SPI/I2S interrupts.
- * @param SPIx: To select the SPIx/I2Sx peripheral, where x can be: 1, 2, 3, 4, 5 or 6
- * in SPI mode or 2 or 3 in I2S mode or I2Sxext for I2S full duplex mode.
- * @param SPI_I2S_IT: specifies the SPI 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 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_EXT(SPIx));
- assert_param(IS_FUNCTIONAL_STATE(NewState));
- assert_param(IS_SPI_I2S_CONFIG_IT(SPI_I2S_IT));
-
- /* Get the SPI 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 interrupt */
- SPIx->CR2 |= itmask;
- }
- else
- {
- /* Disable the selected SPI interrupt */
- SPIx->CR2 &= (uint16_t)~itmask;
- }
-}
-
-/**
- * @brief Checks whether the specified SPIx/I2Sx flag is set or not.
- * @param SPIx: To select the SPIx/I2Sx peripheral, where x can be: 1, 2, 3, 4, 5 or 6
- * in SPI mode or 2 or 3 in I2S mode or I2Sxext for I2S full duplex mode.
- * @param SPI_I2S_FLAG: specifies the SPI 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 SPI_I2S_FLAG_TIFRFE: Format Error.
- * @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_EXT(SPIx));
- assert_param(IS_SPI_I2S_GET_FLAG(SPI_I2S_FLAG));
-
- /* Check the status of the specified SPI 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: To select the SPIx/I2Sx peripheral, where x can be: 1, 2, 3, 4, 5 or 6
- * in SPI mode or 2 or 3 in I2S mode or I2Sxext for I2S full duplex mode.
- * @param SPI_I2S_FLAG: specifies the SPI flag to clear.
- * This function clears only CRCERR flag.
- * @arg SPI_FLAG_CRCERR: CRC Error 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()).
- * @note UDR (UnderRun error) flag is cleared by a read operation to
- * SPI_SR register (SPI_I2S_GetFlagStatus()).
- * @note 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_EXT(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 SPIx/I2Sx interrupt has occurred or not.
- * @param SPIx: To select the SPIx/I2Sx peripheral, where x can be: 1, 2, 3, 4, 5 or 6
- * in SPI mode or 2 or 3 in I2S mode or I2Sxext for I2S full duplex mode.
- * @param SPI_I2S_IT: specifies the SPI 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 interrupt.
- * @arg SPI_I2S_IT_TIFRFE: Format 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_EXT(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 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 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: To select the SPIx/I2Sx peripheral, where x can be: 1, 2, 3, 4, 5 or 6
- * in SPI mode or 2 or 3 in I2S mode or I2Sxext for I2S full duplex mode.
- * @param SPI_I2S_IT: specifies the SPI interrupt pending bit to clear.
- * This function clears only CRCERR interrupt pending bit.
- * @arg SPI_IT_CRCERR: CRC Error interrupt.
- *
- * @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()).
- * @note UDR (UnderRun Error) interrupt pending bit is cleared by a read
- * operation to SPI_SR register (SPI_I2S_GetITStatus()).
- * @note 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_EXT(SPIx));
- assert_param(IS_SPI_I2S_CLEAR_IT(SPI_I2S_IT));
-
- /* Get the SPI_I2S 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 STMicroelectronics *****END OF FILE****/
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