1 files changed, 121 insertions, 0 deletions
diff --git a/drivers/src/fsl_dspi_freertos.c b/drivers/src/fsl_dspi_freertos.c
new file mode 100644
index 0000000..da5eeca
--- /dev/null
+++ b/drivers/src/fsl_dspi_freertos.c
@@ -0,0 +1,121 @@
+/*
+ * 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;
+}