122 lines
3.9 KiB
C
122 lines
3.9 KiB
C
/*
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* Copyright (c) 2015, Freescale Semiconductor, Inc.
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* Copyright 2016-2017 NXP
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* o Redistributions of source code must retain the above copyright notice, this list
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* of conditions and the following disclaimer.
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*
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* o Redistributions in binary form must reproduce the above copyright notice, this
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* list of conditions and the following disclaimer in the documentation and/or
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* other materials provided with the distribution.
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*
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* o Neither the name of the copyright holder nor the names of its
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* contributors may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "fsl_dspi_freertos.h"
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static void DSPI_RTOS_Callback(SPI_Type *base, dspi_master_handle_t *drv_handle, status_t status, void *userData)
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{
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dspi_rtos_handle_t *handle = (dspi_rtos_handle_t *)userData;
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BaseType_t reschedule;
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xSemaphoreGiveFromISR(handle->event, &reschedule);
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portYIELD_FROM_ISR(reschedule);
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}
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status_t DSPI_RTOS_Init(dspi_rtos_handle_t *handle,
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SPI_Type *base,
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const dspi_master_config_t *masterConfig,
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uint32_t srcClock_Hz)
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{
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if (handle == NULL)
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{
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return kStatus_InvalidArgument;
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}
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if (base == NULL)
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{
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return kStatus_InvalidArgument;
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}
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memset(handle, 0, sizeof(dspi_rtos_handle_t));
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#if (configSUPPORT_STATIC_ALLOCATION == 1)
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handle->mutex = xSemaphoreCreateMutexStatic(&handle->mutexBuffer);
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#else
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handle->mutex = xSemaphoreCreateMutex();
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#endif
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if (handle->mutex == NULL)
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{
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return kStatus_Fail;
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}
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#if (configSUPPORT_STATIC_ALLOCATION == 1)
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handle->event = xSemaphoreCreateBinaryStatic(&handle->semaphoreBuffer);
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#else
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handle->event = xSemaphoreCreateBinary();
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#endif
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if (handle->event == NULL)
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{
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vSemaphoreDelete(handle->mutex);
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return kStatus_Fail;
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}
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handle->base = base;
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DSPI_MasterInit(handle->base, masterConfig, srcClock_Hz);
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DSPI_MasterTransferCreateHandle(handle->base, &handle->drv_handle, DSPI_RTOS_Callback, (void *)handle);
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return kStatus_Success;
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}
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status_t DSPI_RTOS_Deinit(dspi_rtos_handle_t *handle)
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{
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DSPI_Deinit(handle->base);
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vSemaphoreDelete(handle->event);
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vSemaphoreDelete(handle->mutex);
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return kStatus_Success;
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}
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status_t DSPI_RTOS_Transfer(dspi_rtos_handle_t *handle, dspi_transfer_t *transfer)
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{
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status_t status;
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/* Lock resource mutex */
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if (xSemaphoreTake(handle->mutex, portMAX_DELAY) != pdTRUE)
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{
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return kStatus_DSPI_Busy;
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}
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status = DSPI_MasterTransferNonBlocking(handle->base, &handle->drv_handle, transfer);
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if (status != kStatus_Success)
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{
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xSemaphoreGive(handle->mutex);
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return status;
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}
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/* Wait for transfer to finish */
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xSemaphoreTake(handle->event, portMAX_DELAY);
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/* Unlock resource mutex */
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xSemaphoreGive(handle->mutex);
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/* Return status captured by callback function */
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return handle->async_status;
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}
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