128 lines
3.4 KiB
C
128 lines
3.4 KiB
C
/*
|
|
* Copyright (c) 2015, Freescale Semiconductor, Inc.
|
|
* Copyright 2016-2017 NXP
|
|
* All rights reserved.
|
|
*
|
|
* SPDX-License-Identifier: BSD-3-Clause
|
|
*/
|
|
|
|
#include "fsl_lpspi_freertos.h"
|
|
|
|
/* Component ID definition, used by tools. */
|
|
#ifndef FSL_COMPONENT_ID
|
|
#define FSL_COMPONENT_ID "platform.drivers.lpspi_freertos"
|
|
#endif
|
|
|
|
static void LPSPI_RTOS_Callback(LPSPI_Type *base, lpspi_master_handle_t *drv_handle, status_t status, void *userData)
|
|
{
|
|
lpspi_rtos_handle_t *handle = (lpspi_rtos_handle_t *)userData;
|
|
BaseType_t reschedule = pdFALSE;
|
|
handle->async_status = status;
|
|
(void)xSemaphoreGiveFromISR(handle->event, &reschedule);
|
|
portYIELD_FROM_ISR(reschedule);
|
|
}
|
|
|
|
/*!
|
|
* brief Initializes LPSPI.
|
|
*
|
|
* This function initializes the LPSPI module and related RTOS context.
|
|
*
|
|
* param handle The RTOS LPSPI handle, the pointer to an allocated space for RTOS context.
|
|
* param base The pointer base address of the LPSPI instance to initialize.
|
|
* param masterConfig Configuration structure to set-up LPSPI in master mode.
|
|
* param srcClock_Hz Frequency of input clock of the LPSPI module.
|
|
* return status of the operation.
|
|
*/
|
|
status_t LPSPI_RTOS_Init(lpspi_rtos_handle_t *handle,
|
|
LPSPI_Type *base,
|
|
const lpspi_master_config_t *masterConfig,
|
|
uint32_t srcClock_Hz)
|
|
{
|
|
if (handle == NULL)
|
|
{
|
|
return kStatus_InvalidArgument;
|
|
}
|
|
|
|
if (base == NULL)
|
|
{
|
|
return kStatus_InvalidArgument;
|
|
}
|
|
|
|
(void)memset(handle, 0, sizeof(lpspi_rtos_handle_t));
|
|
|
|
handle->mutex = xSemaphoreCreateMutex();
|
|
if (handle->mutex == NULL)
|
|
{
|
|
return kStatus_Fail;
|
|
}
|
|
|
|
handle->event = xSemaphoreCreateBinary();
|
|
if (handle->event == NULL)
|
|
{
|
|
vSemaphoreDelete(handle->mutex);
|
|
return kStatus_Fail;
|
|
}
|
|
|
|
handle->base = base;
|
|
|
|
LPSPI_MasterInit(handle->base, masterConfig, srcClock_Hz);
|
|
LPSPI_MasterTransferCreateHandle(handle->base, &handle->drv_handle, LPSPI_RTOS_Callback, (void *)handle);
|
|
|
|
return kStatus_Success;
|
|
}
|
|
|
|
/*!
|
|
* brief Deinitializes the LPSPI.
|
|
*
|
|
* This function deinitializes the LPSPI module and related RTOS context.
|
|
*
|
|
* param handle The RTOS LPSPI handle.
|
|
*/
|
|
status_t LPSPI_RTOS_Deinit(lpspi_rtos_handle_t *handle)
|
|
{
|
|
LPSPI_Deinit(handle->base);
|
|
vSemaphoreDelete(handle->event);
|
|
vSemaphoreDelete(handle->mutex);
|
|
|
|
return kStatus_Success;
|
|
}
|
|
|
|
/*!
|
|
* brief Performs SPI transfer.
|
|
*
|
|
* This function performs an SPI transfer according to data given in the transfer structure.
|
|
*
|
|
* param handle The RTOS LPSPI handle.
|
|
* param transfer Structure specifying the transfer parameters.
|
|
* return status of the operation.
|
|
*/
|
|
status_t LPSPI_RTOS_Transfer(lpspi_rtos_handle_t *handle, lpspi_transfer_t *transfer)
|
|
{
|
|
status_t status;
|
|
|
|
/* Lock resource mutex */
|
|
if (xSemaphoreTake(handle->mutex, portMAX_DELAY) != pdTRUE)
|
|
{
|
|
return kStatus_LPSPI_Busy;
|
|
}
|
|
|
|
status = LPSPI_MasterTransferNonBlocking(handle->base, &handle->drv_handle, transfer);
|
|
if (status != kStatus_Success)
|
|
{
|
|
(void)xSemaphoreGive(handle->mutex);
|
|
return status;
|
|
}
|
|
|
|
/* Wait for transfer to finish */
|
|
if (xSemaphoreTake(handle->event, portMAX_DELAY) != pdTRUE)
|
|
{
|
|
return kStatus_LPSPI_Error;
|
|
}
|
|
|
|
/* Unlock resource mutex */
|
|
(void)xSemaphoreGive(handle->mutex);
|
|
|
|
/* Return status captured by callback function */
|
|
return handle->async_status;
|
|
}
|