From 75abee206d1a575aa98a486d043c94d64df432c1 Mon Sep 17 00:00:00 2001 From: Damien George Date: Sun, 26 Jan 2014 17:41:01 +0000 Subject: stm: USB host mode working! Restructure stm library directories. --- stm/lib/stm32f4xx_spi.c | 1312 ----------------------------------------------- 1 file changed, 1312 deletions(-) delete mode 100644 stm/lib/stm32f4xx_spi.c (limited to 'stm/lib/stm32f4xx_spi.c') 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 - * - *

© COPYRIGHT 2013 STMicroelectronics

- * - * 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****/ -- cgit v1.2.3