PAL RTOS - platform. This file contains the real-time OS APIs that need to be implemented in the platform layer. More...

#include "pal.h"

Functions
void	pal_plat_osReboot (void)
	Initiate a system reboot. More...

void	pal_plat_osApplicationReboot (void)
	Application provided implementation to replace default `pal_osReboot()` functionality. More...

palStatus_t	pal_plat_RTOSInitialize (void *opaqueContext)
	Initialize all data structures (semaphores, mutexes, memory pools, message queues) at system initialization. More...

palStatus_t	pal_plat_RTOSDestroy (void)
	De-initialize thread objects. More...

uint64_t	pal_plat_osKernelSysTick (void)
	Get the RTOS kernel system timer counter. More...

uint64_t	pal_plat_osKernelSysTickMicroSec (uint64_t microseconds)
	Convert the value from microseconds to kernel system ticks. More...

uint64_t	pal_plat_osKernelSysTickFrequency (void)
	Get the system tick frequency. More...

palStatus_t	pal_plat_osThreadCreate (palThreadFuncPtr function, void funcArgument, palThreadPriority_t priority, uint32_t stackSize, palThreadID_t threadID)
	Create and run the thread. More...

palStatus_t	pal_plat_osThreadTerminate (palThreadID_t *threadID)
	Terminate and free allocated data for the thread. More...

palThreadID_t	pal_plat_osThreadGetId (void)
	Get the ID of the current thread. More...

palStatus_t	pal_plat_osDelay (uint32_t milliseconds)
	Wait for a specified period of time in milliseconds. More...

palStatus_t	pal_plat_osTimerCreate (palTimerFuncPtr function, void funcArgument, palTimerType_t timerType, palTimerID_t timerID)
	Create a timer. More...

palStatus_t	pal_plat_osTimerStart (palTimerID_t timerID, uint32_t millisec)
	Start or restart a timer. More...

palStatus_t	pal_plat_osTimerStop (palTimerID_t timerID)
	Stop a timer. More...

palStatus_t	pal_plat_osTimerDelete (palTimerID_t *timerID)
	Delete the timer object. More...

palStatus_t	pal_plat_osMutexCreate (palMutexID_t *mutexID)
	Create and initialize a mutex object. More...

palStatus_t	pal_plat_osMutexWait (palMutexID_t mutexID, uint32_t millisec)
	Wait until a mutex becomes available. More...

palStatus_t	pal_plat_osMutexRelease (palMutexID_t mutexID)
	Release a mutex that was obtained by `osMutexWait`. More...

palStatus_t	pal_plat_osMutexDelete (palMutexID_t *mutexID)
	Delete a mutex object. More...

palStatus_t	pal_plat_osSemaphoreCreate (uint32_t count, palSemaphoreID_t *semaphoreID)
	Create and initialize a semaphore object. More...

palStatus_t	pal_plat_osSemaphoreWait (palSemaphoreID_t semaphoreID, uint32_t millisec, int32_t *countersAvailable)
	Wait until a semaphore token becomes available. More...

palStatus_t	pal_plat_osSemaphoreRelease (palSemaphoreID_t semaphoreID)
	Release a semaphore token. More...

palStatus_t	pal_plat_osSemaphoreDelete (palSemaphoreID_t *semaphoreID)
	Delete a semaphore object. More...

int32_t	pal_plat_osAtomicIncrement (int32_t *valuePtr, int32_t increment)
	Perform an atomic increment for a signed 32-bit value. More...

void *	pal_plat_malloc (size_t len)
	Perform allocation from the heap according to the OS specification. More...

void	pal_plat_free (void *buffer)
	Free memory back to the OS heap. More...

palStatus_t	pal_plat_osGetRoTFromHW (uint8_t *keyBuf, size_t keyLenBytes)
	Retrieve platform Root of Trust (RoT) certificate. More...

palStatus_t	pal_plat_osSetRtcTime (uint64_t rtcSetTime)
	This function calls the platform layer and sets the new real-time clock (RTC) to the hardware. More...

palStatus_t	pal_plat_osGetRtcTime (uint64_t *rtcGetTime)
	This function gets the real-time clock (RTC) from the platform. More...

palStatus_t	pal_plat_rtcDeInit (void)
	This function deinitializes the realt-time clock (RTC) module. More...

palStatus_t	pal_plat_rtcInit (void)
	This function initializes the real-time clock (RTC) module. More...

Detailed Description

PAL RTOS - platform. This file contains the real-time OS APIs that need to be implemented in the platform layer.

Function Documentation

void pal_plat_free ( void * buffer )

Free memory back to the OS heap.

Parameters

[in] buffer A pointer to the buffer that should be freed.

Returns: void

void* pal_plat_malloc ( size_t len )

Perform allocation from the heap according to the OS specification.

Parameters

[in] len The length of the buffer to be allocated in bytes.

Returns: void *, or the pointer of the malloc received from the OS if NULL error occurred

void pal_plat_osApplicationReboot ( void )

Application provided implementation to replace default pal_osReboot() functionality.

int32_t pal_plat_osAtomicIncrement	(	int32_t *	valuePtr,
		int32_t	increment
	)

Perform an atomic increment for a signed 32-bit value.

Parameters

[in,out]	valuePtr	The address of the value to increment.
[in]	increment	The number by which to increment.

Returns: The value of the valuePtr after the increment operation.

palStatus_t pal_plat_osDelay ( uint32_t milliseconds )

Wait for a specified period of time in milliseconds.

Parameters

[in] milliseconds The number of milliseconds to wait before proceeding.

Returns: PAL_SUCCESS(0) in case of success. A negative value indicating a specific error code in case of failure.

palStatus_t pal_plat_osGetRoTFromHW	(	uint8_t *	keyBuf,
		size_t	keyLenBytes
	)

Retrieve platform Root of Trust (RoT) certificate.

Parameters

[in,out]	keyBuf	A pointer to the buffer that holds the RoT.
[in]	keyLenBytes	The size of the buffer to hold the 128 bit key, must be at least 16 bytes.

Returns: PAL_SUCCESS(0) in case of success. A negative value indicating a specific error code in case of failure.

palStatus_t pal_plat_osGetRtcTime ( uint64_t * rtcGetTime )

This function gets the real-time clock (RTC) from the platform.

Parameters

[out] rtcGetTime - Holds the RTC value

Returns: PAL_SUCCESS when the RTC is returned correctly

uint64_t pal_plat_osKernelSysTick ( void )

Get the RTOS kernel system timer counter.

Returns: The RTOS kernel system timer counter.

Note: The required tick counter is the OS (platform) kernel system tick counter.; If the platform supports 64-bit tick counter, please implement it. If the platform supports only 32 bit, note that this counter wraps around very often, once every 42 sec for 100Mhz, for example.

uint64_t pal_plat_osKernelSysTickFrequency ( void )

Get the system tick frequency.

Returns: The system tick frequency.

Note: The system tick frequency MUST be more than 1KHz, so at least one tick per millisecond.

uint64_t pal_plat_osKernelSysTickMicroSec ( uint64_t microseconds )

Convert the value from microseconds to kernel system ticks.

This is the same as CMSIS macro osKernelSysTickMicroSec.

Parameters

microseconds The value in microseconds to be converted to kernel system ticks.

palStatus_t pal_plat_osMutexCreate ( palMutexID_t * mutexID )

Create and initialize a mutex object.

Parameters

[out] mutexID The created mutex ID handle, zero value indicates an error.

Returns: PAL_SUCCESS when the mutex was created successfully, a specific error in case of failure.; PAL_ERR_NO_MEMORY when there is no memory resource available to create a mutex object.

Note: The create function MUST NOT wait for the platform resources and it should return PAL_ERR_RTOS_RESOURCE, unless the platform API is blocking.; By default, the mutex is created with a recursive flag set.

palStatus_t pal_plat_osMutexDelete ( palMutexID_t * mutexID )

Delete a mutex object.

Parameters

[in,out] mutexID The ID of the mutex to delete. In success, mutexID = NULL.

Returns

PAL_SUCCESS when the mutex was deleted successfully, one of the following error codes in case of failure:

PAL_ERR_RTOS_RESOURCE - Mutex already released.
PAL_ERR_RTOS_PARAMETER - Mutex ID is invalid.
PAL_ERR_RTOS_ISR - Cannot be called from interrupt service routines.

Note: After this call, mutexID is no longer valid and cannot be used.

palStatus_t pal_plat_osMutexRelease ( palMutexID_t mutexID )

Release a mutex that was obtained by osMutexWait.

Parameters

[in] mutexID The handle for the mutex.

Returns: PAL_SUCCESS(0) in case of success. A negative value indicating a specific error code in case of failure.

palStatus_t pal_plat_osMutexWait	(	palMutexID_t	mutexID,
		uint32_t	millisec
	)

Wait until a mutex becomes available.

Parameters

[in]	mutexID	The handle for the mutex.
[in]	millisec	The timeout for the waiting operation. If the timeout expires before the mutex is released, an error is returned from the function.

Returns

PAL_SUCCESS(0) in case of success. One of the following error codes in case of failure:

PAL_ERR_RTOS_RESOURCE - Mutex not available but no timeout set.
PAL_ERR_RTOS_TIMEOUT - Mutex was not available until timeout expired.
PAL_ERR_RTOS_PARAMETER - The mutex ID is invalid.
PAL_ERR_RTOS_ISR - Cannot be called from interrupt service routines.

void pal_plat_osReboot ( void )

Initiate a system reboot.

palStatus_t pal_plat_osSemaphoreCreate	(	uint32_t	count,
		palSemaphoreID_t *	semaphoreID
	)

Create and initialize a semaphore object.

Parameters

[in]	count	The number of available resources.
[out]	semaphoreID	The ID of the created semaphore, zero value indicates an error.

Returns: PAL_SUCCESS when the semaphore was created successfully, a specific error in case of failure.; PAL_ERR_NO_MEMORY: No memory resource available to create a semaphore object.

Note: The create function MUST not wait for the platform resources and it should return PAL_ERR_RTOS_RESOURCE, unless the platform API is blocking.

palStatus_t pal_plat_osSemaphoreDelete ( palSemaphoreID_t * semaphoreID )

Delete a semaphore object.

Parameters

[in,out] semaphoreID The ID of the semaphore to delete. On success, semaphoreID = NULL.

Returns: PAL_SUCCESS when the semaphore was deleted successfully. One of the following error codes in case of failure:
PAL_ERR_RTOS_RESOURCE - Semaphore already released.
PAL_ERR_RTOS_PARAMETER - Semaphore ID is invalid.

Note: After this call, the semaphoreID is no longer valid and cannot be used.

palStatus_t pal_plat_osSemaphoreRelease ( palSemaphoreID_t semaphoreID )

Release a semaphore token.

Parameters

[in] semaphoreID The handle for the semaphore.

Returns: PAL_SUCCESS(0) in case of success. A negative value indicating a specific error code in case of failure.

palStatus_t pal_plat_osSemaphoreWait	(	palSemaphoreID_t	semaphoreID,
		uint32_t	millisec,
		int32_t *	countersAvailable
	)

Wait until a semaphore token becomes available.

Parameters

[in]	semaphoreID	The handle for the semaphore.
[in]	millisec	The timeout for the waiting operation. If the timeout expires before the semaphore is released, an error is returned from the function.
[out]	countersAvailable	The number of semaphores available. If semaphores are not available due to timeout or error, zero is returned.

Returns

PAL_SUCCESS(0) in case of success. One of the following error codes in case of failure:

PAL_ERR_RTOS_TIMEOUT - Semaphore was not available until timeout expired.
PAL_ERR_RTOS_PARAMETER - Semaphore ID is invalid.

palStatus_t pal_plat_osSetRtcTime ( uint64_t rtcSetTime )

This function calls the platform layer and sets the new real-time clock (RTC) to the hardware.

Parameters

[in] rtcSetTime the new RTC time

Returns: PAL_SUCCESS when the RTC is returned correctly.

palStatus_t pal_plat_osThreadCreate	(	palThreadFuncPtr	function,
		void *	funcArgument,
		palThreadPriority_t	priority,
		uint32_t	stackSize,
		palThreadID_t *	threadID
	)

Create and run the thread.

Parameters

[in]	function	A function pointer to the thread callback function.
[in]	funcArgument	An argument for the thread function.
[in]	priority	The priority of the thread. Not used in Linux.
[in]	stackSize	The stack size of the thread in bytes, can NOT be 0.
[out]	threadID	The created thread ID handle. In case of error, this value is NULL.

Returns: PAL_SUCCESS(0) in case of success. A negative value indicating a specific error code in case of failure.

palThreadID_t pal_plat_osThreadGetId ( void )

Get the ID of the current thread.

Returns: The ID of the current thread. In case of error, returns PAL_MAX_UINT32.

palStatus_t pal_plat_osThreadTerminate ( palThreadID_t * threadID )

Terminate and free allocated data for the thread.

Parameters

[in] threadID A pointer to a palThreadData_t structure containing information about the thread.

Returns: PAL_SUCCESS(0) in case of success. A negative value indicating a specific error code in case of failure.

palStatus_t pal_plat_osTimerCreate	(	palTimerFuncPtr	function,
		void *	funcArgument,
		palTimerType_t	timerType,
		palTimerID_t *	timerID
	)

Create a timer.

Parameters

[in]	function	A function pointer to the timer callback function.
[in]	funcArgument	An argument for the timer callback function.
[in]	timerType	The timer type to be created, periodic or `oneShot`.
[out]	timerID	The ID of the created timer. Zero value indicates an error.

Returns: PAL_SUCCESS when the timer was created successfully. A specific error in case of failure.; PAL_ERR_NO_MEMORY: No memory resource available to create a timer object.

Note: The timer callback function runs according to the platform resources of stack size and priority.; The create function MUST not wait for platform resources and it should return PAL_ERR_RTOS_RESOURCE, unless the platform API is blocking.

palStatus_t pal_plat_osTimerDelete ( palTimerID_t * timerID )

Delete the timer object.

Parameters

[in,out] timerID The handle for the timer to delete. on success, timerID = NULL.

Returns: PAL_SUCCESS when the timer was deleted successfully. PAL_ERR_RTOS_PARAMETER when the timerID is incorrect.

Note: In case of a running timer, pal_plat_osTimerDelete() MUST stop the timer before deletion.

palStatus_t pal_plat_osTimerStart	(	palTimerID_t	timerID,
		uint32_t	millisec
	)

Start or restart a timer.

Parameters

[in]	timerID	The handle for the timer to start.
[in]	millisec	The time in milliseconds to set the timer to, MUST be larger than 0. In case the value is 0, the error PAL_ERR_RTOS_VALUE will be returned.

Returns: PAL_SUCCESS(0) in case of success. A negative value indicating a specific error code in case of failure.

palStatus_t pal_plat_osTimerStop ( palTimerID_t timerID )

Stop a timer.

Parameters

[in] timerID The handle for the timer to stop.

Returns: PAL_SUCCESS(0) in case of success. A negative value indicating a specific error code in case of failure.

palStatus_t pal_plat_rtcDeInit ( void )

This function deinitializes the realt-time clock (RTC) module.

Returns: PAL_SUCCESS when the success or error upon failing

palStatus_t pal_plat_rtcInit ( void )

This function initializes the real-time clock (RTC) module.

Returns: PAL_SUCCESS when the success or error upon failing

palStatus_t pal_plat_RTOSDestroy ( void )

De-initialize thread objects.

palStatus_t pal_plat_RTOSInitialize ( void * opaqueContext )

Initialize all data structures (semaphores, mutexes, memory pools, message queues) at system initialization.

In case of a failure in any of the initializations, the function returns an error and stops the rest of the initializations.

Parameters

[in] opaqueContext The context passed to the initialization (not required for generic CMSIS, pass NULL in this case).

Returns: PAL_SUCCESS(0) in case of success, PAL_ERR_CREATION_FAILED in case of failure.

Documentation

Functions

Detailed Description

Function Documentation