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os_port_zephyr.c
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os_port_zephyr.c
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/**
* @file os_port_zephyr.c
* @brief RTOS abstraction layer (Zephyr)
*
* @section License
*
* SPDX-License-Identifier: GPL-2.0-or-later
*
* Copyright (C) 2010-2024 Oryx Embedded SARL. All rights reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* @author Oryx Embedded SARL (www.oryx-embedded.com)
* @version 2.4.4
**/
//Switch to the appropriate trace level
#define TRACE_LEVEL TRACE_LEVEL_OFF
//Dependencies
#include <stdio.h>
#include <stdlib.h>
#include "os_port.h"
#include "os_port_zephyr.h"
#include "debug.h"
//Default task parameters
const OsTaskParameters OS_TASK_DEFAULT_PARAMS =
{
NULL, //Task control block
NULL, //Stack
0, //Size of the stack
CONFIG_NUM_PREEMPT_PRIORITIES - 1 //Task priority
};
/**
* @brief Kernel initialization
**/
void osInitKernel(void)
{
//Not implemented
}
/**
* @brief Start kernel
**/
void osStartKernel(void)
{
//Not implemented
}
/**
* @brief Create a task
* @param[in] name NULL-terminated string identifying the task
* @param[in] taskCode Pointer to the task entry function
* @param[in] arg Argument passed to the task function
* @param[in] params Task parameters
* @return Task identifier referencing the newly created task
**/
OsTaskId osCreateTask(const char_t *name, OsTaskCode taskCode, void *arg,
const OsTaskParameters *params)
{
k_tid_t tid;
//Check parameters
if(params->tcb != NULL && params->stack != NULL)
{
//Create a new thread
tid = k_thread_create(params->tcb, params->stack, params->stackSize,
(k_thread_entry_t) taskCode, arg, NULL, NULL, params->priority, 0,
K_NO_WAIT);
//Check whether the thread was successfully created
if(tid != OS_INVALID_TASK_ID)
{
//Set current thread name
k_thread_name_set(tid, name);
}
}
else
{
//Invalid parameters
tid = OS_INVALID_TASK_ID;
}
//Return the handle referencing the newly created thread
return (OsTaskId) tid;
}
/**
* @brief Delete a task
* @param[in] taskId Task identifier referencing the task to be deleted
**/
void osDeleteTask(OsTaskId taskId)
{
k_tid_t tid;
//Delete the currently running thread?
if(taskId == OS_SELF_TASK_ID)
{
tid = k_current_get();
}
else
{
tid = (k_tid_t) taskId;
}
//Abort the thread
k_thread_abort(tid);
}
/**
* @brief Delay routine
* @param[in] delay Amount of time for which the calling task should block
**/
void osDelayTask(systime_t delay)
{
//Put the current thread to sleep
k_sleep(K_MSEC(delay));
}
/**
* @brief Yield control to the next task
**/
void osSwitchTask(void)
{
//Wake up a sleeping thread
k_yield();
}
/**
* @brief Suspend scheduler activity
**/
void osSuspendAllTasks(void)
{
//Lock the scheduler
k_sched_lock();
}
/**
* @brief Resume scheduler activity
**/
void osResumeAllTasks(void)
{
//Unlock the scheduler
k_sched_unlock();
}
/**
* @brief Create an event object
* @param[in] event Pointer to the event object
* @return The function returns TRUE if the event object was successfully
* created. Otherwise, FALSE is returned
**/
bool_t osCreateEvent(OsEvent *event)
{
int err;
//Create a binary semaphore
err = k_sem_init(event, 0, 1);
//Check whether the semaphore was successfully created
if(err)
{
return FALSE;
}
else
{
return TRUE;
}
}
/**
* @brief Delete an event object
* @param[in] event Pointer to the event object
**/
void osDeleteEvent(OsEvent *event)
{
//No resource to release
}
/**
* @brief Set the specified event object to the signaled state
* @param[in] event Pointer to the event object
**/
void osSetEvent(OsEvent *event)
{
//Set the specified event to the signaled state
k_sem_give(event);
}
/**
* @brief Set the specified event object to the nonsignaled state
* @param[in] event Pointer to the event object
**/
void osResetEvent(OsEvent *event)
{
//Force the specified event to the nonsignaled state
k_sem_reset(event);
}
/**
* @brief Wait until the specified event is in the signaled state
* @param[in] event Pointer to the event object
* @param[in] timeout Timeout interval
* @return The function returns TRUE if the state of the specified object is
* signaled. FALSE is returned if the timeout interval elapsed
**/
bool_t osWaitForEvent(OsEvent *event, systime_t timeout)
{
int err;
//Wait until the specified event is in the signaled state or the timeout
//interval elapses
if(timeout == 0)
{
//Non-blocking call
err = k_sem_take(event, K_NO_WAIT);
}
else if(timeout == INFINITE_DELAY)
{
//Infinite timeout period
err = k_sem_take(event, K_FOREVER);
}
else
{
//Wait until the specified event becomes set
err = k_sem_take(event, K_MSEC(timeout));
}
//Check whether the specified event is set
if(err)
{
return FALSE;
}
else
{
return TRUE;
}
}
/**
* @brief Set an event object to the signaled state from an interrupt service routine
* @param[in] event Pointer to the event object
* @return TRUE if setting the event to signaled state caused a task to unblock
* and the unblocked task has a priority higher than the currently running task
**/
bool_t osSetEventFromIsr(OsEvent *event)
{
//Set the specified event to the signaled state
k_sem_give(event);
//The return value is not relevant
return FALSE;
}
/**
* @brief Create a semaphore object
* @param[in] semaphore Pointer to the semaphore object
* @param[in] count The maximum count for the semaphore object. This value
* must be greater than zero
* @return The function returns TRUE if the semaphore was successfully
* created. Otherwise, FALSE is returned
**/
bool_t osCreateSemaphore(OsSemaphore *semaphore, uint_t count)
{
int err;
//Initialize the semaphore object
err = k_sem_init(semaphore, count, count);
//Check whether the semaphore was successfully created
if(err)
{
return FALSE;
}
else
{
return TRUE;
}
}
/**
* @brief Delete a semaphore object
* @param[in] semaphore Pointer to the semaphore object
**/
void osDeleteSemaphore(OsSemaphore *semaphore)
{
//No resource to release
}
/**
* @brief Wait for the specified semaphore to be available
* @param[in] semaphore Pointer to the semaphore object
* @param[in] timeout Timeout interval
* @return The function returns TRUE if the semaphore is available. FALSE is
* returned if the timeout interval elapsed
**/
bool_t osWaitForSemaphore(OsSemaphore *semaphore, systime_t timeout)
{
int err;
//Wait until the semaphore is available or the timeout interval elapses
if(timeout == 0)
{
//Non-blocking call
err = k_sem_take(semaphore, K_NO_WAIT);
}
else if(timeout == INFINITE_DELAY)
{
//Infinite timeout period
err = k_sem_take(semaphore, K_FOREVER);
}
else
{
//Wait until the specified semaphore becomes available
err = k_sem_take(semaphore, K_MSEC(timeout));
}
//Check whether the specified semaphore is available
if(err)
{
return FALSE;
}
else
{
return TRUE;
}
}
/**
* @brief Release the specified semaphore object
* @param[in] semaphore Pointer to the semaphore object
**/
void osReleaseSemaphore(OsSemaphore *semaphore)
{
//Give the semaphore
k_sem_give(semaphore);
}
/**
* @brief Create a mutex object
* @param[in] mutex Pointer to the mutex object
* @return The function returns TRUE if the mutex was successfully
* created. Otherwise, FALSE is returned
**/
bool_t osCreateMutex(OsMutex *mutex)
{
int err;
//Initialize the mutex object
err = k_mutex_init(mutex);
//Check whether the mutex was successfully created
if(err)
{
return FALSE;
}
else
{
return TRUE;
}
}
/**
* @brief Delete a mutex object
* @param[in] mutex Pointer to the mutex object
**/
void osDeleteMutex(OsMutex *mutex)
{
//No resource to release
}
/**
* @brief Acquire ownership of the specified mutex object
* @param[in] mutex Pointer to the mutex object
**/
void osAcquireMutex(OsMutex *mutex)
{
//Lock the mutex
k_mutex_lock(mutex, K_FOREVER);
}
/**
* @brief Release ownership of the specified mutex object
* @param[in] mutex Pointer to the mutex object
**/
void osReleaseMutex(OsMutex *mutex)
{
//Unlock the mutex
k_mutex_unlock(mutex);
}
/**
* @brief Retrieve system time
* @return Number of milliseconds elapsed since the system was last started
**/
systime_t osGetSystemTime(void)
{
//Get the elapsed time since the system booted, in milliseconds
return (systime_t) k_uptime_get();
}
/**
* @brief Retrieve 64-bit system time
* @return Number of milliseconds elapsed since the system was last started
**/
uint64_t osGetSystemTime64(void)
{
//Get the elapsed time since the system booted, in milliseconds
return (uint64_t) k_uptime_get();
}
/**
* @brief Allocate a memory block
* @param[in] size Bytes to allocate
* @return A pointer to the allocated memory block or NULL if
* there is insufficient memory available
**/
__weak_func void *osAllocMem(size_t size)
{
void *p;
//Enter critical section
osSuspendAllTasks();
//Allocate a memory block
p = k_malloc(size);
//Leave critical section
osResumeAllTasks();
//Debug message
TRACE_DEBUG("Allocating %" PRIuSIZE " bytes at 0x%08" PRIXPTR "\r\n",
size, (uintptr_t) p);
//Return a pointer to the newly allocated memory block
return p;
}
/**
* @brief Release a previously allocated memory block
* @param[in] p Previously allocated memory block to be freed
**/
__weak_func void osFreeMem(void *p)
{
//Make sure the pointer is valid
if(p != NULL)
{
//Debug message
TRACE_DEBUG("Freeing memory at 0x%08" PRIXPTR "\r\n", (uintptr_t) p);
//Enter critical section
osSuspendAllTasks();
//Free memory block
k_free(p);
//Leave critical section
osResumeAllTasks();
}
}