| /* |
| * Copyright (c) 2015, Freescale Semiconductor, Inc. |
| * Copyright 2016-2017 NXP |
| * |
| * Redistribution and use in source and binary forms, with or without modification, |
| * are permitted provided that the following conditions are met: |
| * |
| * o Redistributions of source code must retain the above copyright notice, this list |
| * of conditions and the following disclaimer. |
| * |
| * o 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. |
| * |
| * o Neither the name of the copyright holder 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. |
| */ |
| |
| #include "fsl_dspi_freertos.h" |
| |
| static void DSPI_RTOS_Callback(SPI_Type *base, dspi_master_handle_t *drv_handle, status_t status, void *userData) |
| { |
| dspi_rtos_handle_t *handle = (dspi_rtos_handle_t *)userData; |
| BaseType_t reschedule; |
| |
| xSemaphoreGiveFromISR(handle->event, &reschedule); |
| portYIELD_FROM_ISR(reschedule); |
| } |
| |
| status_t DSPI_RTOS_Init(dspi_rtos_handle_t *handle, |
| SPI_Type *base, |
| const dspi_master_config_t *masterConfig, |
| uint32_t srcClock_Hz) |
| { |
| if (handle == NULL) |
| { |
| return kStatus_InvalidArgument; |
| } |
| |
| if (base == NULL) |
| { |
| return kStatus_InvalidArgument; |
| } |
| |
| memset(handle, 0, sizeof(dspi_rtos_handle_t)); |
| |
| #if (configSUPPORT_STATIC_ALLOCATION == 1) |
| handle->mutex = xSemaphoreCreateMutexStatic(&handle->mutexBuffer); |
| #else |
| handle->mutex = xSemaphoreCreateMutex(); |
| #endif |
| if (handle->mutex == NULL) |
| { |
| return kStatus_Fail; |
| } |
| #if (configSUPPORT_STATIC_ALLOCATION == 1) |
| handle->event = xSemaphoreCreateBinaryStatic(&handle->semaphoreBuffer); |
| #else |
| handle->event = xSemaphoreCreateBinary(); |
| #endif |
| if (handle->event == NULL) |
| { |
| vSemaphoreDelete(handle->mutex); |
| return kStatus_Fail; |
| } |
| |
| handle->base = base; |
| |
| DSPI_MasterInit(handle->base, masterConfig, srcClock_Hz); |
| DSPI_MasterTransferCreateHandle(handle->base, &handle->drv_handle, DSPI_RTOS_Callback, (void *)handle); |
| |
| return kStatus_Success; |
| } |
| |
| status_t DSPI_RTOS_Deinit(dspi_rtos_handle_t *handle) |
| { |
| DSPI_Deinit(handle->base); |
| vSemaphoreDelete(handle->event); |
| vSemaphoreDelete(handle->mutex); |
| |
| return kStatus_Success; |
| } |
| |
| status_t DSPI_RTOS_Transfer(dspi_rtos_handle_t *handle, dspi_transfer_t *transfer) |
| { |
| status_t status; |
| |
| /* Lock resource mutex */ |
| if (xSemaphoreTake(handle->mutex, portMAX_DELAY) != pdTRUE) |
| { |
| return kStatus_DSPI_Busy; |
| } |
| |
| status = DSPI_MasterTransferNonBlocking(handle->base, &handle->drv_handle, transfer); |
| if (status != kStatus_Success) |
| { |
| xSemaphoreGive(handle->mutex); |
| return status; |
| } |
| |
| /* Wait for transfer to finish */ |
| xSemaphoreTake(handle->event, portMAX_DELAY); |
| |
| /* Unlock resource mutex */ |
| xSemaphoreGive(handle->mutex); |
| |
| /* Return status captured by callback function */ |
| return handle->async_status; |
| } |