diff --git a/targets/TARGET_STM/TARGET_STM32F7/device/stm32f7xx_hal_spi_ex.c b/targets/TARGET_STM/TARGET_STM32F7/device/stm32f7xx_hal_spi_ex.c
new file mode 100644
index 0000000000..e2f6342f12
--- /dev/null
+++ b/targets/TARGET_STM/TARGET_STM32F7/device/stm32f7xx_hal_spi_ex.c
@@ -0,0 +1,131 @@
+/**
+ ******************************************************************************
+ * @file stm32f7xx_hal_spi_ex.c
+ * @author MCD Application Team
+ * @brief Extended SPI HAL module driver.
+ * This file provides firmware functions to manage the following
+ * SPI peripheral extended functionalities :
+ * + IO operation functions
+ *
+ ******************************************************************************
+ * @attention
+ *
+ * © COPYRIGHT(c) 2017 STMicroelectronics
+ *
+ * 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 SPIEx SPIEx
+ * @brief SPI Extended HAL module driver
+ * @{
+ */
+#ifdef HAL_SPI_MODULE_ENABLED
+
+/* Private typedef -----------------------------------------------------------*/
+/* Private defines -----------------------------------------------------------*/
+/** @defgroup SPIEx_Private_Constants SPIEx Private Constants
+ * @{
+ */
+#define SPI_FIFO_SIZE 4
+/**
+ * @}
+ */
+
+/* Private macros ------------------------------------------------------------*/
+/* Private variables ---------------------------------------------------------*/
+/* Private function prototypes -----------------------------------------------*/
+/* Exported functions --------------------------------------------------------*/
+
+/** @defgroup SPIEx_Exported_Functions SPIEx Exported Functions
+ * @{
+ */
+
+/** @defgroup SPIEx_Exported_Functions_Group1 IO operation functions
+ * @brief Data transfers functions
+ *
+@verbatim
+ ==============================================================================
+ ##### IO operation functions #####
+ ===============================================================================
+ [..]
+ This subsection provides a set of extended functions to manage the SPI
+ data transfers.
+
+ (#) Rx data flush function:
+ (++) HAL_SPIEx_FlushRxFifo()
+
+@endverbatim
+ * @{
+ */
+
+/**
+ * @brief Flush the RX fifo.
+ * @param hspi pointer to a SPI_HandleTypeDef structure that contains
+ * the configuration information for the specified SPI module.
+ * @retval HAL status
+ */
+HAL_StatusTypeDef HAL_SPIEx_FlushRxFifo(SPI_HandleTypeDef *hspi)
+{
+ __IO uint32_t tmpreg;
+ uint8_t count = 0U;
+ while ((hspi->Instance->SR & SPI_FLAG_FRLVL) != SPI_FRLVL_EMPTY)
+ {
+ count++;
+ tmpreg = hspi->Instance->DR;
+ UNUSED(tmpreg); /* To avoid GCC warning */
+ if (count == SPI_FIFO_SIZE)
+ {
+ return HAL_TIMEOUT;
+ }
+ }
+ return HAL_OK;
+}
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+#endif /* HAL_SPI_MODULE_ENABLED */
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
diff --git a/targets/TARGET_STM/TARGET_STM32F7/device/stm32f7xx_hal_spi_ex.h b/targets/TARGET_STM/TARGET_STM32F7/device/stm32f7xx_hal_spi_ex.h
new file mode 100644
index 0000000000..07885dc0be
--- /dev/null
+++ b/targets/TARGET_STM/TARGET_STM32F7/device/stm32f7xx_hal_spi_ex.h
@@ -0,0 +1,91 @@
+/**
+ ******************************************************************************
+ * @file stm32f7xx_hal_spi_ex.h
+ * @author MCD Application Team
+ * @brief Header file of SPI HAL Extended module.
+ ******************************************************************************
+ * @attention
+ *
+ * © COPYRIGHT(c) 2017 STMicroelectronics
+ *
+ * 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.
+ *
+ ******************************************************************************
+ */
+
+/* Define to prevent recursive inclusion -------------------------------------*/
+#ifndef __STM32F7xx_HAL_SPI_EX_H
+#define __STM32F7xx_HAL_SPI_EX_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Includes ------------------------------------------------------------------*/
+#include "stm32f7xx_hal_def.h"
+
+/** @addtogroup STM32F7xx_HAL_Driver
+ * @{
+ */
+
+/** @addtogroup SPIEx
+ * @{
+ */
+
+/* Exported types ------------------------------------------------------------*/
+/* Exported constants --------------------------------------------------------*/
+/* Exported macros -----------------------------------------------------------*/
+/* Exported functions --------------------------------------------------------*/
+/** @addtogroup SPIEx_Exported_Functions
+ * @{
+ */
+
+/* Initialization and de-initialization functions ****************************/
+/* IO operation functions *****************************************************/
+/** @addtogroup SPIEx_Exported_Functions_Group1
+ * @{
+ */
+HAL_StatusTypeDef HAL_SPIEx_FlushRxFifo(SPI_HandleTypeDef *hspi);
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __STM32F7xx_HAL_SPI_EX_H */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
diff --git a/targets/TARGET_STM/stm_spi_api.c b/targets/TARGET_STM/stm_spi_api.c
index 3607be5bc6..e93b23ff8d 100644
--- a/targets/TARGET_STM/stm_spi_api.c
+++ b/targets/TARGET_STM/stm_spi_api.c
@@ -526,6 +526,11 @@ static int spi_master_start_asynch_transfer(spi_t *obj, transfer_type_t transfer
NVIC_SetPriority(irq_n, 1);
NVIC_EnableIRQ(irq_n);
+ // flush FIFO
+#if defined(SPI_FLAG_FRLVL) // STM32F0 STM32F3 STM32F7 STM32L4
+ HAL_SPIEx_FlushRxFifo(handle);
+#endif
+
// enable the right hal transfer
int rc = 0;
switch(transfer_type) {