tinyusb/src/osal/osal_freertos.h

/**************************************************************************/
/*!
    @file     osal_freeRTOS.h
    @author   hathach (tinyusb.org)

    @section LICENSE

    Software License Agreement (BSD License)

    Copyright (c) 2013, hathach (tinyusb.org)
    All rights reserved.

    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 the copyright holders 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 ''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 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.

    This file is part of the tinyusb stack.
*/
/**************************************************************************/

/** \ingroup group_osal
 * @{
 *  \defgroup Group_FreeRTOS  FreeRTOS
 *  @{ */

#ifndef _TUSB_OSAL_FREERTOS_H_
#define _TUSB_OSAL_FREERTOS_H_

//------------- FreeRTOS Headers -------------//
#include "FreeRTOS.h"
#include "semphr.h"
#include "queue.h"
#include "task.h"

#ifdef __cplusplus
extern "C" {
#endif

#if 0
// Helper to determine if we are in ISR to use ISR API (only cover ARM Cortex)
static inline bool in_isr(void)
{
  return (SCB->ICSR & SCB_ICSR_VECTACTIVE_Msk);
}
#endif

//--------------------------------------------------------------------+
// TASK API
//--------------------------------------------------------------------+
static inline void osal_task_delay(uint32_t msec)
{
  vTaskDelay( pdMS_TO_TICKS(msec) );
}

//--------------------------------------------------------------------+
// Semaphore API
//--------------------------------------------------------------------+
typedef StaticSemaphore_t osal_semaphore_def_t;
typedef SemaphoreHandle_t osal_semaphore_t;

static inline osal_semaphore_t osal_semaphore_create(osal_semaphore_def_t* semdef)
{
  return xSemaphoreCreateBinaryStatic(semdef);
}

static inline bool osal_semaphore_post(osal_semaphore_t sem_hdl, bool in_isr)
{
  return in_isr ?  xSemaphoreGiveFromISR(sem_hdl, NULL) : xSemaphoreGive(sem_hdl);
}

static inline bool osal_semaphore_wait (osal_semaphore_t sem_hdl, uint32_t msec)
{
  uint32_t const ticks = (msec == OSAL_TIMEOUT_WAIT_FOREVER) ? portMAX_DELAY : pdMS_TO_TICKS(msec);
  return xSemaphoreTake(sem_hdl, ticks);
}

static inline void osal_semaphore_reset(osal_semaphore_t const sem_hdl)
{
  xQueueReset(sem_hdl);
}

//--------------------------------------------------------------------+
// MUTEX API (priority inheritance)
//--------------------------------------------------------------------+
typedef StaticSemaphore_t osal_mutex_def_t;
typedef SemaphoreHandle_t osal_mutex_t;

static inline osal_mutex_t osal_mutex_create(osal_mutex_def_t* mdef)
{
  return xSemaphoreCreateMutexStatic(mdef);
}

#define osal_mutex_lock     osal_semaphore_wait

static inline bool osal_mutex_unlock(osal_mutex_t mutex_hdl)
{
  return xSemaphoreGive(mutex_hdl);
}

//--------------------------------------------------------------------+
// QUEUE API
//--------------------------------------------------------------------+

// role device/host is used by OS NONE for mutex (disable usb isr) only
#define OSAL_QUEUE_DEF(_role, _name, _depth, _type) \
  static _type _name##_##buf[_depth];\
  osal_queue_def_t _name = { .depth = _depth, .item_sz = sizeof(_type), .buf = _name##_##buf };

typedef struct
{
  uint16_t depth;
  uint16_t item_sz;
  void*    buf;

  StaticQueue_t sq;
}osal_queue_def_t;

typedef QueueHandle_t osal_queue_t;

static inline osal_queue_t osal_queue_create(osal_queue_def_t* qdef)
{
  return xQueueCreateStatic(qdef->depth, qdef->item_sz, (uint8_t*) qdef->buf, &qdef->sq);
}

static inline bool osal_queue_receive(osal_queue_t const queue_hdl, void* data)
{
  return xQueueReceive(queue_hdl, data, portMAX_DELAY);
}

static inline bool osal_queue_send(osal_queue_t const queue_hdl, void const * data, bool in_isr)
{
  return in_isr ? xQueueSendToBackFromISR(queue_hdl, data, NULL) : xQueueSendToBack(queue_hdl, data, OSAL_TIMEOUT_WAIT_FOREVER);
}

static inline void osal_queue_reset(osal_queue_t const queue_hdl)
{
  xQueueReset(queue_hdl);
}

#ifdef __cplusplus
 }
#endif

#endif /* _TUSB_OSAL_FREERTOS_H_ */

/** @} */
/** @} */