SPKT
Diff: targets/cmsis/TARGET_STM/TARGET_STM32F7/stm32f7xx_hal_i2s.c
- Revision:
- 0:e87aa4c49e95
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/targets/cmsis/TARGET_STM/TARGET_STM32F7/stm32f7xx_hal_i2s.c Tue Jun 04 21:51:46 2019 +0000 @@ -0,0 +1,1556 @@ +/** + ****************************************************************************** + * @file stm32f7xx_hal_i2s.c + * @author MCD Application Team + * @version V1.0.4 + * @date 09-December-2015 + * @brief I2S HAL module driver. + * This file provides firmware functions to manage the following + * functionalities of the Integrated Interchip Sound (I2S) peripheral: + * + Initialization and de-initialization functions + * + IO operation functions + * + Peripheral State and Errors functions + @verbatim + =============================================================================== + ##### How to use this driver ##### + =============================================================================== + [..] + The I2S HAL driver can be used as follows: + + (#) Declare a I2S_HandleTypeDef handle structure. + (#) Initialize the I2S low level resources by implement the HAL_I2S_MspInit() API: + (##) Enable the SPIx interface clock. + (##) I2S pins configuration: + (+++) Enable the clock for the I2S GPIOs. + (+++) Configure these I2S pins as alternate function pull-up. + (##) NVIC configuration if you need to use interrupt process (HAL_I2S_Transmit_IT() + and HAL_I2S_Receive_IT() APIs). + (+++) Configure the I2Sx interrupt priority. + (+++) Enable the NVIC I2S IRQ handle. + (##) DMA Configuration if you need to use DMA process (HAL_I2S_Transmit_DMA() + and HAL_I2S_Receive_DMA() APIs: + (+++) Declare a DMA handle structure for the Tx/Rx channel. + (+++) Enable the DMAx interface clock. + (+++) Configure the declared DMA handle structure with the required Tx/Rx parameters. + (+++) Configure the DMA Tx/Rx Channel. + (+++) Associate the initialized DMA handle to the I2S DMA Tx/Rx handle. + (+++) Configure the priority and enable the NVIC for the transfer complete interrupt on the + DMA Tx/Rx Channel. + + (#) Program the Mode, Standard, Data Format, MCLK Output, Audio frequency and Polarity + using HAL_I2S_Init() function. + + -@- The specific I2S interrupts (Transmission complete interrupt, + RXNE interrupt and Error Interrupts) will be managed using the macros + __HAL_I2S_ENABLE_IT() and __HAL_I2S_DISABLE_IT() inside the transmit and receive process. + -@- Make sure that either: + (+@) I2S clock is configured based on SYSCLK or + (+@) External clock source is configured after setting correctly + the define constant EXTERNAL_CLOCK_VALUE in the stm32f3xx_hal_conf.h file. + + (#) Three mode of operations are available within this driver : + + *** Polling mode IO operation *** + ================================= + [..] + (+) Send an amount of data in blocking mode using HAL_I2S_Transmit() + (+) Receive an amount of data in blocking mode using HAL_I2S_Receive() + + *** Interrupt mode IO operation *** + =================================== + [..] + (+) Send an amount of data in non blocking mode using HAL_I2S_Transmit_IT() + (+) At transmission end of half transfer HAL_I2S_TxHalfCpltCallback is executed and user can + add his own code by customization of function pointer HAL_I2S_TxHalfCpltCallback + (+) At transmission end of transfer HAL_I2S_TxCpltCallback is executed and user can + add his own code by customization of function pointer HAL_I2S_TxCpltCallback + (+) Receive an amount of data in non blocking mode using HAL_I2S_Receive_IT() + (+) At reception end of half transfer HAL_I2S_RxHalfCpltCallback is executed and user can + add his own code by customization of function pointer HAL_I2S_RxHalfCpltCallback + (+) At reception end of transfer HAL_I2S_RxCpltCallback is executed and user can + add his own code by customization of function pointer HAL_I2S_RxCpltCallback + (+) In case of transfer Error, HAL_I2S_ErrorCallback() function is executed and user can + add his own code by customization of function pointer HAL_I2S_ErrorCallback + + *** DMA mode IO operation *** + ============================== + [..] + (+) Send an amount of data in non blocking mode (DMA) using HAL_I2S_Transmit_DMA() + (+) At transmission end of half transfer HAL_I2S_TxHalfCpltCallback is executed and user can + add his own code by customization of function pointer HAL_I2S_TxHalfCpltCallback + (+) At transmission end of transfer HAL_I2S_TxCpltCallback is executed and user can + add his own code by customization of function pointer HAL_I2S_TxCpltCallback + (+) Receive an amount of data in non blocking mode (DMA) using HAL_I2S_Receive_DMA() + (+) At reception end of half transfer HAL_I2S_RxHalfCpltCallback is executed and user can + add his own code by customization of function pointer HAL_I2S_RxHalfCpltCallback + (+) At reception end of transfer HAL_I2S_RxCpltCallback is executed and user can + add his own code by customization of function pointer HAL_I2S_RxCpltCallback + (+) In case of transfer Error, HAL_I2S_ErrorCallback() function is executed and user can + add his own code by customization of function pointer HAL_I2S_ErrorCallback + (+) Pause the DMA Transfer using HAL_I2S_DMAPause() + (+) Resume the DMA Transfer using HAL_I2S_DMAResume() + (+) Stop the DMA Transfer using HAL_I2S_DMAStop() + + *** I2S HAL driver macros list *** + ============================================= + [..] + Below the list of most used macros in I2S HAL driver. + + (+) __HAL_I2S_ENABLE: Enable the specified SPI peripheral (in I2S mode) + (+) __HAL_I2S_DISABLE: Disable the specified SPI peripheral (in I2S mode) + (+) __HAL_I2S_ENABLE_IT : Enable the specified I2S interrupts + (+) __HAL_I2S_DISABLE_IT : Disable the specified I2S interrupts + (+) __HAL_I2S_GET_FLAG: Check whether the specified I2S flag is set or not + + [..] + (@) You can refer to the I2S HAL driver header file for more useful macros + + @endverbatim + ****************************************************************************** + * @attention + * + * <h2><center>© COPYRIGHT(c) 2015 STMicroelectronics</center></h2> + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. Neither the name of STMicroelectronics nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER + * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, + * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************** + */ + +/* Includes ------------------------------------------------------------------*/ +#include "stm32f7xx_hal.h" + +/** @addtogroup STM32F7xx_HAL_Driver + * @{ + */ + +/** @defgroup I2S I2S + * @brief I2S HAL module driver + * @{ + */ + +#ifdef HAL_I2S_MODULE_ENABLED + +/* Private typedef -----------------------------------------------------------*/ +/* Private define ------------------------------------------------------------*/ +/* Private macro -------------------------------------------------------------*/ +/* Private variables ---------------------------------------------------------*/ +/* Private function prototypes -----------------------------------------------*/ +/** @defgroup I2S_Private_Functions I2S Private Functions + * @{ + */ +static void I2S_DMATxCplt(DMA_HandleTypeDef *hdma); +static void I2S_DMATxHalfCplt(DMA_HandleTypeDef *hdma); +static void I2S_DMARxCplt(DMA_HandleTypeDef *hdma); +static void I2S_DMARxHalfCplt(DMA_HandleTypeDef *hdma); +static void I2S_DMAError(DMA_HandleTypeDef *hdma); +static void I2S_Transmit_IT(I2S_HandleTypeDef *hi2s); +static void I2S_Receive_IT(I2S_HandleTypeDef *hi2s); +static uint32_t I2S_GetClockFreq(I2S_HandleTypeDef *hi2s); +static HAL_StatusTypeDef I2S_WaitFlagStateUntilTimeout(I2S_HandleTypeDef *hi2s, uint32_t Flag, uint32_t State, uint32_t Timeout); +/** + * @} + */ + +/* Exported functions ---------------------------------------------------------*/ + +/** @defgroup I2S_Exported_Functions I2S Exported Functions + * @{ + */ + +/** @defgroup I2S_Exported_Functions_Group1 Initialization and de-initialization functions + * @brief Initialization and Configuration functions + * +@verbatim + =============================================================================== + ##### Initialization and de-initialization functions ##### + =============================================================================== + [..] This subsection provides a set of functions allowing to initialize and + de-initialize the I2Sx peripheral in simplex mode: + + (+) User must Implement HAL_I2S_MspInit() function in which he configures + all related peripherals resources (CLOCK, GPIO, DMA, IT and NVIC ). + + (+) Call the function HAL_I2S_Init() to configure the selected device with + the selected configuration: + (++) Mode + (++) Standard + (++) Data Format + (++) MCLK Output + (++) Audio frequency + (++) Polarity + (++) Full duplex mode + + (+) Call the function HAL_I2S_DeInit() to restore the default configuration + of the selected I2Sx peripheral. +@endverbatim + * @{ + */ + +/** + * @brief Initializes the I2S according to the specified parameters + * in the I2S_InitTypeDef and create the associated handle. + * @param hi2s: pointer to a I2S_HandleTypeDef structure that contains + * the configuration information for I2S module + * @retval HAL status + */ +HAL_StatusTypeDef HAL_I2S_Init(I2S_HandleTypeDef *hi2s) +{ + uint16_t tmpreg = 0, i2sdiv = 2, i2sodd = 0, packetlength = 1; + uint32_t tmp = 0, i2sclk = 0; + + /* Check the I2S handle allocation */ + if(hi2s == NULL) + { + return HAL_ERROR; + } + + /* Check the parameters */ + assert_param(IS_I2S_ALL_INSTANCE(hi2s->Instance)); + assert_param(IS_I2S_MODE(hi2s->Init.Mode)); + assert_param(IS_I2S_STANDARD(hi2s->Init.Standard)); + assert_param(IS_I2S_DATA_FORMAT(hi2s->Init.DataFormat)); + assert_param(IS_I2S_MCLK_OUTPUT(hi2s->Init.MCLKOutput)); + assert_param(IS_I2S_AUDIO_FREQ(hi2s->Init.AudioFreq)); + assert_param(IS_I2S_CPOL(hi2s->Init.CPOL)); + assert_param(IS_I2S_CLOCKSOURCE(hi2s->Init.ClockSource)); + + if(hi2s->State == HAL_I2S_STATE_RESET) + { + /* Allocate lock resource and initialize it */ + hi2s->Lock = HAL_UNLOCKED; + /* Init the low level hardware : GPIO, CLOCK, CORTEX...etc */ + HAL_I2S_MspInit(hi2s); + } + + hi2s->State = HAL_I2S_STATE_BUSY; + + /*----------------------- SPIx I2SCFGR & I2SPR Configuration -----------------*/ + /* Clear I2SMOD, I2SE, I2SCFG, PCMSYNC, I2SSTD, CKPOL, DATLEN and CHLEN bits */ + hi2s->Instance->I2SCFGR &= ~(SPI_I2SCFGR_CHLEN | SPI_I2SCFGR_DATLEN | SPI_I2SCFGR_CKPOL | \ + SPI_I2SCFGR_I2SSTD | SPI_I2SCFGR_PCMSYNC | SPI_I2SCFGR_I2SCFG | \ + SPI_I2SCFGR_I2SE | SPI_I2SCFGR_I2SMOD); + hi2s->Instance->I2SPR = 0x0002; + + /* Get the I2SCFGR register value */ + tmpreg = hi2s->Instance->I2SCFGR; + + /* If the default value has to be written, reinitialize i2sdiv and i2sodd*/ + if(hi2s->Init.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(hi2s->Init.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, the specific define should be set + in the project configuration or in the stm32f3xx_conf.h file */ + if(hi2s->Init.ClockSource == I2S_CLOCK_EXTERNAL) + { + /* Set the I2S clock to the external clock value */ + i2sclk = EXTERNAL_CLOCK_VALUE; + } + else + { + /* Get the I2S source clock value */ + i2sclk = I2S_GetClockFreq(hi2s); + } + + /* Compute the Real divider depending on the MCLK output state, with a floating point */ + if(hi2s->Init.MCLKOutput == I2S_MCLKOUTPUT_ENABLE) + { + /* MCLK output is enabled */ + tmp = (uint16_t)(((((i2sclk / 256) * 10) / hi2s->Init.AudioFreq)) + 5); + } + else + { + /* MCLK output is disabled */ + tmp = (uint16_t)(((((i2sclk / (32 * packetlength)) *10 ) / hi2s->Init.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 */ + hi2s->Instance->I2SPR = (uint16_t)((uint16_t)i2sdiv | (uint16_t)(i2sodd | (uint16_t)hi2s->Init.MCLKOutput)); + + /* Configure the I2S with the I2S_InitStruct values */ + tmpreg |= (uint16_t)((uint16_t)SPI_I2SCFGR_I2SMOD | (uint16_t)(hi2s->Init.Mode | \ + (uint16_t)(hi2s->Init.Standard | (uint16_t)(hi2s->Init.DataFormat | \ + (uint16_t)hi2s->Init.CPOL)))); + + /* Write to SPIx I2SCFGR */ + hi2s->Instance->I2SCFGR = tmpreg; + + hi2s->ErrorCode = HAL_I2S_ERROR_NONE; + hi2s->State= HAL_I2S_STATE_READY; + + return HAL_OK; +} + +/** + * @brief DeInitializes the I2S peripheral + * @param hi2s: pointer to a I2S_HandleTypeDef structure that contains + * the configuration information for I2S module + * @retval HAL status + */ +HAL_StatusTypeDef HAL_I2S_DeInit(I2S_HandleTypeDef *hi2s) +{ + /* Check the I2S handle allocation */ + if(hi2s == NULL) + { + return HAL_ERROR; + } + + /* Check the parameters */ + assert_param(IS_I2S_ALL_INSTANCE(hi2s->Instance)); + + hi2s->State = HAL_I2S_STATE_BUSY; + + /* DeInit the low level hardware: GPIO, CLOCK, NVIC... */ + HAL_I2S_MspDeInit(hi2s); + + hi2s->ErrorCode = HAL_I2S_ERROR_NONE; + hi2s->State = HAL_I2S_STATE_RESET; + + /* Release Lock */ + __HAL_UNLOCK(hi2s); + + return HAL_OK; +} + +/** + * @brief I2S MSP Init + * @param hi2s: pointer to a I2S_HandleTypeDef structure that contains + * the configuration information for I2S module + * @retval None + */ + __weak void HAL_I2S_MspInit(I2S_HandleTypeDef *hi2s) +{ + /* Prevent unused argument(s) compilation warning */ + UNUSED(hi2s); + + /* NOTE : This function Should not be modified, when the callback is needed, + the HAL_I2S_MspInit could be implemented in the user file + */ +} + +/** + * @brief I2S MSP DeInit + * @param hi2s: pointer to a I2S_HandleTypeDef structure that contains + * the configuration information for I2S module + * @retval None + */ + __weak void HAL_I2S_MspDeInit(I2S_HandleTypeDef *hi2s) +{ + /* Prevent unused argument(s) compilation warning */ + UNUSED(hi2s); + + /* NOTE : This function Should not be modified, when the callback is needed, + the HAL_I2S_MspDeInit could be implemented in the user file + */ +} + +/** + * @} + */ + +/** @defgroup I2S_Exported_Functions_Group2 Input and Output operation functions + * @brief Data transfers functions + * +@verbatim + =============================================================================== + ##### IO operation functions ##### + =============================================================================== + [..] + This subsection provides a set of functions allowing to manage the I2S data + transfers. + + (#) There are two modes of transfer: + (++) Blocking mode : The communication is performed in the polling mode. + The status of all data processing is returned by the same function + after finishing transfer. + (++) No-Blocking mode : The communication is performed using Interrupts + or DMA. These functions return the status of the transfer startup. + The end of the data processing will be indicated through the + dedicated I2S IRQ when using Interrupt mode or the DMA IRQ when + using DMA mode. + + (#) Blocking mode functions are : + (++) HAL_I2S_Transmit() + (++) HAL_I2S_Receive() + + (#) No-Blocking mode functions with Interrupt are : + (++) HAL_I2S_Transmit_IT() + (++) HAL_I2S_Receive_IT() + + (#) No-Blocking mode functions with DMA are : + (++) HAL_I2S_Transmit_DMA() + (++) HAL_I2S_Receive_DMA() + + (#) A set of Transfer Complete Callbacks are provided in non Blocking mode: + (++) HAL_I2S_TxCpltCallback() + (++) HAL_I2S_RxCpltCallback() + (++) HAL_I2S_ErrorCallback() + +@endverbatim + * @{ + */ + +/** + * @brief Transmit an amount of data in blocking mode + * @param hi2s: pointer to a I2S_HandleTypeDef structure that contains + * the configuration information for I2S module + * @param pData: a 16-bit pointer to data buffer. + * @param Size: number of data sample to be sent: + * @note When a 16-bit data frame or a 16-bit data frame extended is selected during the I2S + * configuration phase, the Size parameter means the number of 16-bit data length + * in the transaction and when a 24-bit data frame or a 32-bit data frame is selected + * the Size parameter means the number of 16-bit data length. + * @param Timeout: Timeout duration + * @note The I2S is kept enabled at the end of transaction to avoid the clock de-synchronization + * between Master and Slave(example: audio streaming). + * @retval HAL status + */ +HAL_StatusTypeDef HAL_I2S_Transmit(I2S_HandleTypeDef *hi2s, uint16_t *pData, uint16_t Size, uint32_t Timeout) +{ + if((pData == NULL ) || (Size == 0)) + { + return HAL_ERROR; + } + + if(hi2s->State == HAL_I2S_STATE_READY) + { + if(((hi2s->Instance->I2SCFGR & (SPI_I2SCFGR_DATLEN | SPI_I2SCFGR_CHLEN)) == I2S_DATAFORMAT_24B)||\ + ((hi2s->Instance->I2SCFGR & (SPI_I2SCFGR_DATLEN | SPI_I2SCFGR_CHLEN)) == I2S_DATAFORMAT_32B)) + { + hi2s->TxXferSize = (Size << 1); + hi2s->TxXferCount = (Size << 1); + } + else + { + hi2s->TxXferSize = Size; + hi2s->TxXferCount = Size; + } + + /* Process Locked */ + __HAL_LOCK(hi2s); + + hi2s->ErrorCode = HAL_I2S_ERROR_NONE; + hi2s->State = HAL_I2S_STATE_BUSY_TX; + + /* Check if the I2S is already enabled */ + if((hi2s->Instance->I2SCFGR &SPI_I2SCFGR_I2SE) != SPI_I2SCFGR_I2SE) + { + /* Enable I2S peripheral */ + __HAL_I2S_ENABLE(hi2s); + } + + while(hi2s->TxXferCount > 0) + { + hi2s->Instance->DR = (*pData++); + hi2s->TxXferCount--; + /* Wait until TXE flag is set */ + if (I2S_WaitFlagStateUntilTimeout(hi2s, I2S_FLAG_TXE, SET, Timeout) != HAL_OK) + { + /* Set the error code and execute error callback*/ + hi2s->ErrorCode |= HAL_I2S_ERROR_TIMEOUT; + HAL_I2S_ErrorCallback(hi2s); + return HAL_TIMEOUT; + } + + /* Check if an underrun occurs */ + if(__HAL_I2S_GET_FLAG(hi2s, I2S_FLAG_UDR) == SET) + { + /* Set the I2S State ready */ + hi2s->State = HAL_I2S_STATE_READY; + + /* Process Unlocked */ + __HAL_UNLOCK(hi2s); + + /* Set the error code and execute error callback*/ + hi2s->ErrorCode |= HAL_I2S_ERROR_UDR; + HAL_I2S_ErrorCallback(hi2s); + + return HAL_ERROR; + } + } + + /* Check if Slave mode is selected */ + if(((hi2s->Instance->I2SCFGR & SPI_I2SCFGR_I2SCFG) == I2S_MODE_SLAVE_TX) || ((hi2s->Instance->I2SCFGR & SPI_I2SCFGR_I2SCFG) == I2S_MODE_SLAVE_RX)) + { + /* Wait until Busy flag is reset */ + if (I2S_WaitFlagStateUntilTimeout(hi2s, I2S_FLAG_BSY, SET, Timeout) != HAL_OK) + { + /* Set the error code and execute error callback*/ + hi2s->ErrorCode |= HAL_I2S_ERROR_TIMEOUT; + HAL_I2S_ErrorCallback(hi2s); + return HAL_TIMEOUT; + } + } + + hi2s->State = HAL_I2S_STATE_READY; + + /* Process Unlocked */ + __HAL_UNLOCK(hi2s); + + return HAL_OK; + } + else + { + return HAL_BUSY; + } +} + +/** + * @brief Receive an amount of data in blocking mode + * @param hi2s: pointer to a I2S_HandleTypeDef structure that contains + * the configuration information for I2S module + * @param pData: a 16-bit pointer to data buffer. + * @param Size: number of data sample to be sent: + * @note When a 16-bit data frame or a 16-bit data frame extended is selected during the I2S + * configuration phase, the Size parameter means the number of 16-bit data length + * in the transaction and when a 24-bit data frame or a 32-bit data frame is selected + * the Size parameter means the number of 16-bit data length. + * @param Timeout: Timeout duration + * @note The I2S is kept enabled at the end of transaction to avoid the clock de-synchronization + * between Master and Slave(example: audio streaming). + * @note In I2S Master Receiver mode, just after enabling the peripheral the clock will be generate + * in continuous way and as the I2S is not disabled at the end of the I2S transaction. + * @retval HAL status + */ +HAL_StatusTypeDef HAL_I2S_Receive(I2S_HandleTypeDef *hi2s, uint16_t *pData, uint16_t Size, uint32_t Timeout) +{ + if((pData == NULL ) || (Size == 0)) + { + return HAL_ERROR; + } + + if(hi2s->State == HAL_I2S_STATE_READY) + { + if(((hi2s->Instance->I2SCFGR & (SPI_I2SCFGR_DATLEN | SPI_I2SCFGR_CHLEN)) == I2S_DATAFORMAT_24B)||\ + ((hi2s->Instance->I2SCFGR & (SPI_I2SCFGR_DATLEN | SPI_I2SCFGR_CHLEN)) == I2S_DATAFORMAT_32B)) + { + hi2s->RxXferSize = (Size << 1); + hi2s->RxXferCount = (Size << 1); + } + else + { + hi2s->RxXferSize = Size; + hi2s->RxXferCount = Size; + } + /* Process Locked */ + __HAL_LOCK(hi2s); + + hi2s->ErrorCode = HAL_I2S_ERROR_NONE; + hi2s->State = HAL_I2S_STATE_BUSY_RX; + + /* Check if the I2S is already enabled */ + if((hi2s->Instance->I2SCFGR & SPI_I2SCFGR_I2SE) != SPI_I2SCFGR_I2SE) + { + /* Enable I2S peripheral */ + __HAL_I2S_ENABLE(hi2s); + } + + /* Check if Master Receiver mode is selected */ + if((hi2s->Instance->I2SCFGR & SPI_I2SCFGR_I2SCFG) == I2S_MODE_MASTER_RX) + { + /* Clear the Overrun Flag by a read operation on the SPI_DR register followed by a read + access to the SPI_SR register. */ + __HAL_I2S_CLEAR_OVRFLAG(hi2s); + } + + /* Receive data */ + while(hi2s->RxXferCount > 0) + { + /* Wait until RXNE flag is set */ + if (I2S_WaitFlagStateUntilTimeout(hi2s, I2S_FLAG_RXNE, SET, Timeout) != HAL_OK) + { + /* Set the error code and execute error callback*/ + hi2s->ErrorCode |= HAL_I2S_ERROR_TIMEOUT; + HAL_I2S_ErrorCallback(hi2s); + return HAL_TIMEOUT; + } + + /* Check if an overrun occurs */ + if(__HAL_I2S_GET_FLAG(hi2s, I2S_FLAG_OVR) == SET) + { + /* Set the I2S State ready */ + hi2s->State = HAL_I2S_STATE_READY; + + /* Process Unlocked */ + __HAL_UNLOCK(hi2s); + + /* Set the error code and execute error callback*/ + hi2s->ErrorCode |= HAL_I2S_ERROR_OVR; + HAL_I2S_ErrorCallback(hi2s); + + return HAL_ERROR; + } + + (*pData++) = hi2s->Instance->DR; + hi2s->RxXferCount--; + } + + hi2s->State = HAL_I2S_STATE_READY; + + /* Process Unlocked */ + __HAL_UNLOCK(hi2s); + + return HAL_OK; + } + else + { + return HAL_BUSY; + } +} + +/** + * @brief Transmit an amount of data in non-blocking mode with Interrupt + * @param hi2s: pointer to a I2S_HandleTypeDef structure that contains + * the configuration information for I2S module + * @param pData: a 16-bit pointer to data buffer. + * @param Size: number of data sample to be sent: + * @note When a 16-bit data frame or a 16-bit data frame extended is selected during the I2S + * configuration phase, the Size parameter means the number of 16-bit data length + * in the transaction and when a 24-bit data frame or a 32-bit data frame is selected + * the Size parameter means the number of 16-bit data length. + * @note The I2S is kept enabled at the end of transaction to avoid the clock de-synchronization + * between Master and Slave(example: audio streaming). + * @retval HAL status + */ +HAL_StatusTypeDef HAL_I2S_Transmit_IT(I2S_HandleTypeDef *hi2s, uint16_t *pData, uint16_t Size) +{ + if(hi2s->State == HAL_I2S_STATE_READY) + { + if((pData == NULL) || (Size == 0)) + { + return HAL_ERROR; + } + + hi2s->pTxBuffPtr = pData; + if(((hi2s->Instance->I2SCFGR & (SPI_I2SCFGR_DATLEN | SPI_I2SCFGR_CHLEN)) == I2S_DATAFORMAT_24B)||\ + ((hi2s->Instance->I2SCFGR & (SPI_I2SCFGR_DATLEN | SPI_I2SCFGR_CHLEN)) == I2S_DATAFORMAT_32B)) + { + hi2s->TxXferSize = (Size << 1); + hi2s->TxXferCount = (Size << 1); + } + else + { + hi2s->TxXferSize = Size; + hi2s->TxXferCount = Size; + } + + /* Process Locked */ + __HAL_LOCK(hi2s); + + hi2s->ErrorCode = HAL_I2S_ERROR_NONE; + hi2s->State = HAL_I2S_STATE_BUSY_TX; + + /* Enable TXE and ERR interrupt */ + __HAL_I2S_ENABLE_IT(hi2s, (I2S_IT_TXE | I2S_IT_ERR)); + + /* Check if the I2S is already enabled */ + if((hi2s->Instance->I2SCFGR &SPI_I2SCFGR_I2SE) != SPI_I2SCFGR_I2SE) + { + /* Enable I2S peripheral */ + __HAL_I2S_ENABLE(hi2s); + } + + /* Process Unlocked */ + __HAL_UNLOCK(hi2s); + + return HAL_OK; + } + else + { + return HAL_BUSY; + } +} + +/** + * @brief Receive an amount of data in non-blocking mode with Interrupt + * @param hi2s: pointer to a I2S_HandleTypeDef structure that contains + * the configuration information for I2S module + * @param pData: a 16-bit pointer to the Receive data buffer. + * @param Size: number of data sample to be sent: + * @note When a 16-bit data frame or a 16-bit data frame extended is selected during the I2S + * configuration phase, the Size parameter means the number of 16-bit data length + * in the transaction and when a 24-bit data frame or a 32-bit data frame is selected + * the Size parameter means the number of 16-bit data length. + * @note The I2S is kept enabled at the end of transaction to avoid the clock de-synchronization + * between Master and Slave(example: audio streaming). + * @note It is recommended to use DMA for the I2S receiver to avoid de-synchronisation + * between Master and Slave otherwise the I2S interrupt should be optimized. + * @retval HAL status + */ +HAL_StatusTypeDef HAL_I2S_Receive_IT(I2S_HandleTypeDef *hi2s, uint16_t *pData, uint16_t Size) +{ + if(hi2s->State == HAL_I2S_STATE_READY) + { + if((pData == NULL) || (Size == 0)) + { + return HAL_ERROR; + } + + hi2s->pRxBuffPtr = pData; + if(((hi2s->Instance->I2SCFGR & (SPI_I2SCFGR_DATLEN | SPI_I2SCFGR_CHLEN)) == I2S_DATAFORMAT_24B)||\ + ((hi2s->Instance->I2SCFGR & (SPI_I2SCFGR_DATLEN | SPI_I2SCFGR_CHLEN)) == I2S_DATAFORMAT_32B)) + { + hi2s->RxXferSize = (Size << 1); + hi2s->RxXferCount = (Size << 1); + } + else + { + hi2s->RxXferSize = Size; + hi2s->RxXferCount = Size; + } + /* Process Locked */ + __HAL_LOCK(hi2s); + + hi2s->ErrorCode = HAL_I2S_ERROR_NONE; + hi2s->State = HAL_I2S_STATE_BUSY_RX; + + /* Enable TXE and ERR interrupt */ + __HAL_I2S_ENABLE_IT(hi2s, (I2S_IT_RXNE | I2S_IT_ERR)); + + /* Check if the I2S is already enabled */ + if((hi2s->Instance->I2SCFGR &SPI_I2SCFGR_I2SE) != SPI_I2SCFGR_I2SE) + { + /* Enable I2S peripheral */ + __HAL_I2S_ENABLE(hi2s); + } + + /* Process Unlocked */ + __HAL_UNLOCK(hi2s); + + return HAL_OK; + } + else + { + return HAL_BUSY; + } +} + +/** + * @brief Transmit an amount of data in non-blocking mode with DMA + * @param hi2s: pointer to a I2S_HandleTypeDef structure that contains + * the configuration information for I2S module + * @param pData: a 16-bit pointer to the Transmit data buffer. + * @param Size: number of data sample to be sent: + * @note When a 16-bit data frame or a 16-bit data frame extended is selected during the I2S + * configuration phase, the Size parameter means the number of 16-bit data length + * in the transaction and when a 24-bit data frame or a 32-bit data frame is selected + * the Size parameter means the number of 16-bit data length. + * @note The I2S is kept enabled at the end of transaction to avoid the clock de-synchronization + * between Master and Slave(example: audio streaming). + * @retval HAL status + */ +HAL_StatusTypeDef HAL_I2S_Transmit_DMA(I2S_HandleTypeDef *hi2s, uint16_t *pData, uint16_t Size) +{ + uint32_t *tmp; + + if((pData == NULL) || (Size == 0)) + { + return HAL_ERROR; + } + + if(hi2s->State == HAL_I2S_STATE_READY) + { + hi2s->pTxBuffPtr = pData; + if(((hi2s->Instance->I2SCFGR & (SPI_I2SCFGR_DATLEN | SPI_I2SCFGR_CHLEN)) == I2S_DATAFORMAT_24B)||\ + ((hi2s->Instance->I2SCFGR & (SPI_I2SCFGR_DATLEN | SPI_I2SCFGR_CHLEN)) == I2S_DATAFORMAT_32B)) + { + hi2s->TxXferSize = (Size << 1); + hi2s->TxXferCount = (Size << 1); + } + else + { + hi2s->TxXferSize = Size; + hi2s->TxXferCount = Size; + } + + /* Process Locked */ + __HAL_LOCK(hi2s); + + hi2s->ErrorCode = HAL_I2S_ERROR_NONE; + hi2s->State = HAL_I2S_STATE_BUSY_TX; + + /* Set the I2S Tx DMA Half transfer complete callback */ + hi2s->hdmatx->XferHalfCpltCallback = I2S_DMATxHalfCplt; + + /* Set the I2S TxDMA transfer complete callback */ + hi2s->hdmatx->XferCpltCallback = I2S_DMATxCplt; + + /* Set the DMA error callback */ + hi2s->hdmatx->XferErrorCallback = I2S_DMAError; + + /* Enable the Tx DMA Channel */ + tmp = (uint32_t*)&pData; + HAL_DMA_Start_IT(hi2s->hdmatx, *(uint32_t*)tmp, (uint32_t)&hi2s->Instance->DR, hi2s->TxXferSize); + + /* Check if the I2S is already enabled */ + if((hi2s->Instance->I2SCFGR &SPI_I2SCFGR_I2SE) != SPI_I2SCFGR_I2SE) + { + /* Enable I2S peripheral */ + __HAL_I2S_ENABLE(hi2s); + } + + /* Enable Tx DMA Request */ + hi2s->Instance->CR2 |= SPI_CR2_TXDMAEN; + + /* Process Unlocked */ + __HAL_UNLOCK(hi2s); + + return HAL_OK; + } + else + { + return HAL_BUSY; + } +} + +/** + * @brief Receive an amount of data in non-blocking mode with DMA + * @param hi2s: pointer to a I2S_HandleTypeDef structure that contains + * the configuration information for I2S module + * @param pData: a 16-bit pointer to the Receive data buffer. + * @param Size: number of data sample to be sent: + * @note When a 16-bit data frame or a 16-bit data frame extended is selected during the I2S + * configuration phase, the Size parameter means the number of 16-bit data length + * in the transaction and when a 24-bit data frame or a 32-bit data frame is selected + * the Size parameter means the number of 16-bit data length. + * @note The I2S is kept enabled at the end of transaction to avoid the clock de-synchronization + * between Master and Slave(example: audio streaming). + * @retval HAL status + */ +HAL_StatusTypeDef HAL_I2S_Receive_DMA(I2S_HandleTypeDef *hi2s, uint16_t *pData, uint16_t Size) +{ + uint32_t *tmp; + + if((pData == NULL) || (Size == 0)) + { + return HAL_ERROR; + } + + if(hi2s->State == HAL_I2S_STATE_READY) + { + hi2s->pRxBuffPtr = pData; + if(((hi2s->Instance->I2SCFGR & (SPI_I2SCFGR_DATLEN | SPI_I2SCFGR_CHLEN)) == I2S_DATAFORMAT_24B)||\ + ((hi2s->Instance->I2SCFGR & (SPI_I2SCFGR_DATLEN | SPI_I2SCFGR_CHLEN)) == I2S_DATAFORMAT_32B)) + { + hi2s->RxXferSize = (Size << 1); + hi2s->RxXferCount = (Size << 1); + } + else + { + hi2s->RxXferSize = Size; + hi2s->RxXferCount = Size; + } + /* Process Locked */ + __HAL_LOCK(hi2s); + + hi2s->ErrorCode = HAL_I2S_ERROR_NONE; + hi2s->State = HAL_I2S_STATE_BUSY_RX; + + /* Set the I2S Rx DMA Half transfer complete callback */ + hi2s->hdmarx->XferHalfCpltCallback = I2S_DMARxHalfCplt; + + /* Set the I2S Rx DMA transfer complete callback */ + hi2s->hdmarx->XferCpltCallback = I2S_DMARxCplt; + + /* Set the DMA error callback */ + hi2s->hdmarx->XferErrorCallback = I2S_DMAError; + + /* Check if Master Receiver mode is selected */ + if((hi2s->Instance->I2SCFGR & SPI_I2SCFGR_I2SCFG) == I2S_MODE_MASTER_RX) + { + /* Clear the Overrun Flag by a read operation to the SPI_DR register followed by a read + access to the SPI_SR register. */ + __HAL_I2S_CLEAR_OVRFLAG(hi2s); + } + + /* Enable the Rx DMA Channel */ + tmp = (uint32_t*)&pData; + HAL_DMA_Start_IT(hi2s->hdmarx, (uint32_t)&hi2s->Instance->DR, *(uint32_t*)tmp, hi2s->RxXferSize); + + /* Check if the I2S is already enabled */ + if((hi2s->Instance->I2SCFGR &SPI_I2SCFGR_I2SE) != SPI_I2SCFGR_I2SE) + { + /* Enable I2S peripheral */ + __HAL_I2S_ENABLE(hi2s); + } + + /* Enable Rx DMA Request */ + hi2s->Instance->CR2 |= SPI_CR2_RXDMAEN; + + /* Process Unlocked */ + __HAL_UNLOCK(hi2s); + + return HAL_OK; + } + else + { + return HAL_BUSY; + } +} + +/** + * @brief Pauses the audio stream playing from the Media. + * @param hi2s: pointer to a I2S_HandleTypeDef structure that contains + * the configuration information for I2S module + * @retval HAL status + */ +HAL_StatusTypeDef HAL_I2S_DMAPause(I2S_HandleTypeDef *hi2s) +{ + /* Process Locked */ + __HAL_LOCK(hi2s); + + if(hi2s->State == HAL_I2S_STATE_BUSY_TX) + { + /* Disable the I2S DMA Tx request */ + hi2s->Instance->CR2 &= (uint32_t)(~SPI_CR2_TXDMAEN); + } + else if(hi2s->State == HAL_I2S_STATE_BUSY_RX) + { + /* Disable the I2S DMA Rx request */ + hi2s->Instance->CR2 &= (uint32_t)(~SPI_CR2_RXDMAEN); + } + else if(hi2s->State == HAL_I2S_STATE_BUSY_TX_RX) + { + if((hi2s->Init.Mode == I2S_MODE_SLAVE_TX)||(hi2s->Init.Mode == I2S_MODE_MASTER_TX)) + { + /* Disable the I2S DMA Tx request */ + hi2s->Instance->CR2 &= (uint32_t)(~SPI_CR2_TXDMAEN); + } + else + { + /* Disable the I2S DMA Rx request */ + hi2s->Instance->CR2 &= (uint32_t)(~SPI_CR2_RXDMAEN); + } + } + + /* Process Unlocked */ + __HAL_UNLOCK(hi2s); + + return HAL_OK; +} + +/** + * @brief Resumes the audio stream playing from the Media. + * @param hi2s: pointer to a I2S_HandleTypeDef structure that contains + * the configuration information for I2S module + * @retval HAL status + */ +HAL_StatusTypeDef HAL_I2S_DMAResume(I2S_HandleTypeDef *hi2s) +{ + /* Process Locked */ + __HAL_LOCK(hi2s); + + if(hi2s->State == HAL_I2S_STATE_BUSY_TX) + { + /* Enable the I2S DMA Tx request */ + SET_BIT(hi2s->Instance->CR2, SPI_CR2_TXDMAEN); + } + else if(hi2s->State == HAL_I2S_STATE_BUSY_RX) + { + /* Enable the I2S DMA Rx request */ + SET_BIT(hi2s->Instance->CR2, SPI_CR2_RXDMAEN); + } + + /* If the I2S peripheral is still not enabled, enable it */ + if(HAL_IS_BIT_CLR(hi2s->Instance->I2SCFGR, SPI_I2SCFGR_I2SE)) + { + /* Enable I2S peripheral */ + __HAL_I2S_ENABLE(hi2s); + } + + /* Process Unlocked */ + __HAL_UNLOCK(hi2s); + + return HAL_OK; +} + +/** + * @brief Stops the audio stream playing from the Media. + * @param hi2s: pointer to a I2S_HandleTypeDef structure that contains + * the configuration information for I2S module + * @retval HAL status + */ +HAL_StatusTypeDef HAL_I2S_DMAStop(I2S_HandleTypeDef *hi2s) +{ + /* Process Locked */ + __HAL_LOCK(hi2s); + + /* Disable the I2S Tx/Rx DMA requests */ + CLEAR_BIT(hi2s->Instance->CR2, SPI_CR2_TXDMAEN); + CLEAR_BIT(hi2s->Instance->CR2, SPI_CR2_RXDMAEN); + + /* Abort the I2S DMA Channel tx */ + if(hi2s->hdmatx != NULL) + { + /* Disable the I2S DMA channel */ + __HAL_DMA_DISABLE(hi2s->hdmatx); + HAL_DMA_Abort(hi2s->hdmatx); + } + /* Abort the I2S DMA Channel rx */ + if(hi2s->hdmarx != NULL) + { + /* Disable the I2S DMA channel */ + __HAL_DMA_DISABLE(hi2s->hdmarx); + HAL_DMA_Abort(hi2s->hdmarx); + } + + /* Disable I2S peripheral */ + __HAL_I2S_DISABLE(hi2s); + + hi2s->State = HAL_I2S_STATE_READY; + + /* Process Unlocked */ + __HAL_UNLOCK(hi2s); + + return HAL_OK; +} + +/** + * @brief This function handles I2S interrupt request. + * @param hi2s: pointer to a I2S_HandleTypeDef structure that contains + * the configuration information for I2S module + * @retval HAL status + */ +void HAL_I2S_IRQHandler(I2S_HandleTypeDef *hi2s) +{ + __IO uint32_t i2ssr = hi2s->Instance->SR; + + if(hi2s->State == HAL_I2S_STATE_BUSY_RX) + { + /* I2S in mode Receiver ----------------------------------------------------*/ + if(((i2ssr & I2S_FLAG_RXNE) == I2S_FLAG_RXNE) && (__HAL_I2S_GET_IT_SOURCE(hi2s, I2S_IT_RXNE) != RESET)) + { + I2S_Receive_IT(hi2s); + } + + /* I2S Overrun error interrupt occurred -------------------------------------*/ + if(((i2ssr & I2S_FLAG_OVR) == I2S_FLAG_OVR) && (__HAL_I2S_GET_IT_SOURCE(hi2s, I2S_IT_ERR) != RESET)) + { + /* Disable RXNE and ERR interrupt */ + __HAL_I2S_DISABLE_IT(hi2s, (I2S_IT_RXNE | I2S_IT_ERR)); + + /* Set the I2S State ready */ + hi2s->State = HAL_I2S_STATE_READY; + + /* Set the error code and execute error callback*/ + hi2s->ErrorCode |= HAL_I2S_ERROR_OVR; + HAL_I2S_ErrorCallback(hi2s); + } + } + else if(hi2s->State == HAL_I2S_STATE_BUSY_TX) + { + /* I2S in mode Transmitter ---------------------------------------------------*/ + if(((i2ssr & I2S_FLAG_TXE) == I2S_FLAG_TXE) && (__HAL_I2S_GET_IT_SOURCE(hi2s, I2S_IT_TXE) != RESET)) + { + I2S_Transmit_IT(hi2s); + } + + /* I2S Underrun error interrupt occurred ------------------------------------*/ + if(((i2ssr & I2S_FLAG_UDR) == I2S_FLAG_UDR) && (__HAL_I2S_GET_IT_SOURCE(hi2s, I2S_IT_ERR) != RESET)) + { + /* Disable TXE and ERR interrupt */ + __HAL_I2S_DISABLE_IT(hi2s, (I2S_IT_TXE | I2S_IT_ERR)); + + /* Set the I2S State ready */ + hi2s->State = HAL_I2S_STATE_READY; + + /* Set the error code and execute error callback*/ + hi2s->ErrorCode |= HAL_I2S_ERROR_UDR; + HAL_I2S_ErrorCallback(hi2s); + } + } +} + +/** + * @} + */ + +/** + * @} + */ + +/** @addtogroup I2S_Private_Functions I2S Private Functions + * @{ + */ +/** + * @brief This function handles I2S Communication Timeout. + * @param hi2s: pointer to a I2S_HandleTypeDef structure that contains + * the configuration information for I2S module + * @param Flag: Flag checked + * @param State: Value of the flag expected + * @param Timeout: Duration of the timeout + * @retval HAL status + */ +static HAL_StatusTypeDef I2S_WaitFlagStateUntilTimeout(I2S_HandleTypeDef *hi2s, uint32_t Flag, + uint32_t State, uint32_t Timeout) +{ + uint32_t tickstart = 0; + + /* Get tick */ + tickstart = HAL_GetTick(); + + /* Wait until flag is set */ + if(State == RESET) + { + while(__HAL_I2S_GET_FLAG(hi2s, Flag) == RESET) + { + if(Timeout != HAL_MAX_DELAY) + { + if((Timeout == 0)||((HAL_GetTick() - tickstart ) > Timeout)) + { + /* Set the I2S State ready */ + hi2s->State= HAL_I2S_STATE_READY; + + /* Process Unlocked */ + __HAL_UNLOCK(hi2s); + + return HAL_TIMEOUT; + } + } + } + } + else + { + while(__HAL_I2S_GET_FLAG(hi2s, Flag) != RESET) + { + if(Timeout != HAL_MAX_DELAY) + { + if((Timeout == 0)||((HAL_GetTick() - tickstart ) > Timeout)) + { + /* Set the I2S State ready */ + hi2s->State= HAL_I2S_STATE_READY; + + /* Process Unlocked */ + __HAL_UNLOCK(hi2s); + + return HAL_TIMEOUT; + } + } + } + } + return HAL_OK; +} +/** + * @} + */ + +/** @addtogroup I2S_Exported_Functions I2S Exported Functions + * @{ + */ + +/** @addtogroup I2S_Exported_Functions_Group2 Input and Output operation functions + * @{ + */ +/** + * @brief Tx Transfer Half completed callbacks + * @param hi2s: pointer to a I2S_HandleTypeDef structure that contains + * the configuration information for I2S module + * @retval None + */ + __weak void HAL_I2S_TxHalfCpltCallback(I2S_HandleTypeDef *hi2s) +{ + /* Prevent unused argument(s) compilation warning */ + UNUSED(hi2s); + + /* NOTE : This function Should not be modified, when the callback is needed, + the HAL_I2S_TxHalfCpltCallback could be implemented in the user file + */ +} + +/** + * @brief Tx Transfer completed callbacks + * @param hi2s: pointer to a I2S_HandleTypeDef structure that contains + * the configuration information for I2S module + * @retval None + */ + __weak void HAL_I2S_TxCpltCallback(I2S_HandleTypeDef *hi2s) +{ + /* Prevent unused argument(s) compilation warning */ + UNUSED(hi2s); + + /* NOTE : This function Should not be modified, when the callback is needed, + the HAL_I2S_TxCpltCallback could be implemented in the user file + */ +} + +/** + * @brief Rx Transfer half completed callbacks + * @param hi2s: pointer to a I2S_HandleTypeDef structure that contains + * the configuration information for I2S module + * @retval None + */ +__weak void HAL_I2S_RxHalfCpltCallback(I2S_HandleTypeDef *hi2s) +{ + /* Prevent unused argument(s) compilation warning */ + UNUSED(hi2s); + + /* NOTE : This function Should not be modified, when the callback is needed, + the HAL_I2S_RxCpltCallback could be implemented in the user file + */ +} + +/** + * @brief Rx Transfer completed callbacks + * @param hi2s: pointer to a I2S_HandleTypeDef structure that contains + * the configuration information for I2S module + * @retval None + */ +__weak void HAL_I2S_RxCpltCallback(I2S_HandleTypeDef *hi2s) +{ + /* Prevent unused argument(s) compilation warning */ + UNUSED(hi2s); + + /* NOTE : This function Should not be modified, when the callback is needed, + the HAL_I2S_RxCpltCallback could be implemented in the user file + */ +} + +/** + * @brief I2S error callbacks + * @param hi2s: pointer to a I2S_HandleTypeDef structure that contains + * the configuration information for I2S module + * @retval None + */ + __weak void HAL_I2S_ErrorCallback(I2S_HandleTypeDef *hi2s) +{ + /* Prevent unused argument(s) compilation warning */ + UNUSED(hi2s); + + /* NOTE : This function Should not be modified, when the callback is needed, + the HAL_I2S_ErrorCallback could be implemented in the user file + */ +} + +/** + * @} + */ + +/** @defgroup I2S_Exported_Functions_Group3 Peripheral State and Errors functions + * @brief Peripheral State functions + * +@verbatim + =============================================================================== + ##### Peripheral State and Errors functions ##### + =============================================================================== + [..] + This subsection permits to get in run-time the status of the peripheral + and the data flow. + +@endverbatim + * @{ + */ + +/** + * @brief Return the I2S state + * @param hi2s: pointer to a I2S_HandleTypeDef structure that contains + * the configuration information for I2S module + * @retval HAL state + */ +HAL_I2S_StateTypeDef HAL_I2S_GetState(I2S_HandleTypeDef *hi2s) +{ + return hi2s->State; +} + +/** + * @brief Return the I2S error code + * @param hi2s: pointer to a I2S_HandleTypeDef structure that contains + * the configuration information for I2S module + * @retval I2S Error Code + */ +uint32_t HAL_I2S_GetError(I2S_HandleTypeDef *hi2s) +{ + return hi2s->ErrorCode; +} +/** + * @} + */ + +/** + * @} + */ + + /** + * @brief Get I2S Input Clock based on I2S source clock selection + * @param hi2s: pointer to a I2S_HandleTypeDef structure that contains + * the configuration information for I2S module. + * @retval I2S Clock Input + */ +static uint32_t I2S_GetClockFreq(I2S_HandleTypeDef *hi2s) +{ + uint32_t tmpreg = 0; + /* This variable used to store the VCO Input (value in Hz) */ + uint32_t vcoinput = 0; + /* This variable used to store the I2S_CK_x (value in Hz) */ + uint32_t i2sclocksource = 0; + + /* Configure I2S Clock based on I2S source clock selection */ + + /* I2S_CLK_x : I2S Block Clock configuration for different clock sources selected */ + switch(hi2s->Init.ClockSource) + { + case I2S_CLOCK_SYSCLK : + { + /* Configure the PLLI2S division factor */ + /* PLLI2S_VCO Input = PLL_SOURCE/PLLI2SM */ + if((RCC->PLLCFGR & RCC_PLLCFGR_PLLSRC) == RCC_PLLSOURCE_HSI) + { + /* In Case the PLL Source is HSI (Internal Clock) */ + vcoinput = (HSI_VALUE / (uint32_t)(RCC->PLLCFGR & RCC_PLLCFGR_PLLM)); + } + else + { + /* In Case the PLL Source is HSE (External Clock) */ + vcoinput = ((HSE_VALUE / (uint32_t)(RCC->PLLCFGR & RCC_PLLCFGR_PLLM))); + } + + /* PLLI2S_VCO Output = PLLI2S_VCO Input * PLLI2SN */ + /* I2S_CLK(first level) = PLLI2S_VCO Output/PLLI2SR */ + tmpreg = (RCC->PLLI2SCFGR & RCC_PLLI2SCFGR_PLLI2SR) >> 28; + i2sclocksource = (vcoinput * ((RCC->PLLI2SCFGR & RCC_PLLI2SCFGR_PLLI2SN) >> 6))/(tmpreg); + + break; + } + case I2S_CLOCK_EXTERNAL : + { + i2sclocksource = EXTERNAL_CLOCK_VALUE; + break; + } + default : + { + break; + } + } + + /* the return result is the value of I2S clock */ + return i2sclocksource; +} + +/** @addtogroup I2S_Private_Functions I2S Private Functions + * @{ + */ +/** + * @brief DMA I2S transmit process complete callback + * @param hdma: pointer to a DMA_HandleTypeDef structure that contains + * the configuration information for the specified DMA module. + * @retval None + */ +static void I2S_DMATxCplt(DMA_HandleTypeDef *hdma) +{ + I2S_HandleTypeDef* hi2s = (I2S_HandleTypeDef*)((DMA_HandleTypeDef*)hdma)->Parent; + + if((hdma->Instance->CR & DMA_SxCR_CIRC) == 0) + { + hi2s->TxXferCount = 0; + + /* Disable Tx DMA Request */ + hi2s->Instance->CR2 &= (uint32_t)(~SPI_CR2_TXDMAEN); + + if(hi2s->State == HAL_I2S_STATE_BUSY_TX_RX) + { + if(hi2s->RxXferCount == 0) + { + hi2s->State = HAL_I2S_STATE_READY; + } + } + else + { + hi2s->State = HAL_I2S_STATE_READY; + } + } + HAL_I2S_TxCpltCallback(hi2s); +} + +/** + * @brief DMA I2S transmit process half complete callback + * @param hdma: pointer to a DMA_HandleTypeDef structure that contains + * the configuration information for the specified DMA module. + * @retval None + */ +static void I2S_DMATxHalfCplt(DMA_HandleTypeDef *hdma) +{ + I2S_HandleTypeDef* hi2s = (I2S_HandleTypeDef*)((DMA_HandleTypeDef*)hdma)->Parent; + + HAL_I2S_TxHalfCpltCallback(hi2s); +} + +/** + * @brief DMA I2S receive process complete callback + * @param hdma: pointer to a DMA_HandleTypeDef structure that contains + * the configuration information for the specified DMA module. + * @retval None + */ +static void I2S_DMARxCplt(DMA_HandleTypeDef *hdma) +{ + I2S_HandleTypeDef* hi2s = (I2S_HandleTypeDef*)((DMA_HandleTypeDef*)hdma)->Parent; + + if((hdma->Instance->CR & DMA_SxCR_CIRC) == 0) + { + /* Disable Rx DMA Request */ + hi2s->Instance->CR2 &= (uint32_t)(~SPI_CR2_RXDMAEN); + + hi2s->RxXferCount = 0; + if(hi2s->State == HAL_I2S_STATE_BUSY_TX_RX) + { + if(hi2s->TxXferCount == 0) + { + hi2s->State = HAL_I2S_STATE_READY; + } + } + else + { + hi2s->State = HAL_I2S_STATE_READY; + } + } + HAL_I2S_RxCpltCallback(hi2s); +} + +/** + * @brief DMA I2S receive process half complete callback + * @param hdma: pointer to a DMA_HandleTypeDef structure that contains + * the configuration information for the specified DMA module. + * @retval None + */ +static void I2S_DMARxHalfCplt(DMA_HandleTypeDef *hdma) +{ + I2S_HandleTypeDef* hi2s = (I2S_HandleTypeDef*)((DMA_HandleTypeDef*)hdma)->Parent; + + HAL_I2S_RxHalfCpltCallback(hi2s); +} + +/** + * @brief DMA I2S communication error callback + * @param hdma: pointer to a DMA_HandleTypeDef structure that contains + * the configuration information for the specified DMA module. + * @retval None + */ +static void I2S_DMAError(DMA_HandleTypeDef *hdma) +{ + I2S_HandleTypeDef* hi2s = ( I2S_HandleTypeDef* )((DMA_HandleTypeDef* )hdma)->Parent; + + /* Disable Rx and Tx DMA Request */ + hi2s->Instance->CR2 &= (uint32_t)(~(SPI_CR2_RXDMAEN | SPI_CR2_TXDMAEN)); + hi2s->TxXferCount = 0; + hi2s->RxXferCount = 0; + + hi2s->State= HAL_I2S_STATE_READY; + + /* Set the error code and execute error callback*/ + hi2s->ErrorCode |= HAL_I2S_ERROR_DMA; + HAL_I2S_ErrorCallback(hi2s); +} + +/** + * @brief Transmit an amount of data in non-blocking mode with Interrupt + * @param hi2s: pointer to a I2S_HandleTypeDef structure that contains + * the configuration information for I2S module + * @retval None + */ +static void I2S_Transmit_IT(I2S_HandleTypeDef *hi2s) +{ + /* Transmit data */ + hi2s->Instance->DR = (*hi2s->pTxBuffPtr++); + hi2s->TxXferCount--; + + if(hi2s->TxXferCount == 0) + { + /* Disable TXE and ERR interrupt */ + __HAL_I2S_DISABLE_IT(hi2s, (I2S_IT_TXE | I2S_IT_ERR)); + + hi2s->State = HAL_I2S_STATE_READY; + HAL_I2S_TxCpltCallback(hi2s); + } +} + +/** + * @brief Receive an amount of data in non-blocking mode with Interrupt + * @param hi2s: I2S handle + * @retval None + */ +static void I2S_Receive_IT(I2S_HandleTypeDef *hi2s) +{ + /* Receive data */ + (*hi2s->pRxBuffPtr++) = hi2s->Instance->DR; + hi2s->RxXferCount--; + + if(hi2s->RxXferCount == 0) + { + /* Disable RXNE and ERR interrupt */ + __HAL_I2S_DISABLE_IT(hi2s, (I2S_IT_RXNE | I2S_IT_ERR)); + + hi2s->State = HAL_I2S_STATE_READY; + HAL_I2S_RxCpltCallback(hi2s); + } +} +/** + * @} + */ + +#endif /* HAL_I2S_MODULE_ENABLED */ +/** + * @} + */ + +/** + * @} + */ + +/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/