TaskP

Introduction

TaskP interface

Files
file	TaskP.h
	Task module for the RTOS Porting Interface.

Data Structures
struct	TaskP_Params
	Basic TaskP Parameters. More...

Functions
TaskP_Handle	TaskP_create (TaskP_Fxn taskfxn, const TaskP_Params *params)
	Function to create a task. More...
TaskP_Status	TaskP_delete (TaskP_Handle *handle)
	Function to delete a task. More...
void	TaskP_Params_init (TaskP_Params *params)
	Initialize params structure to default values. More...
void	TaskP_sleep (uint32_t timeout)
	Function for Task sleep in units of OS tick. More...
void	TaskP_sleepInMsecs (uint32_t timeoutInMsecs)
	Function for Task sleep in units of msecs. More...
void	TaskP_setPrio (TaskP_Handle handle, uint32_t priority)
	Function to update Task priority. More...
TaskP_Handle	TaskP_self (void)
	Function returns the Task handle of current task. More...
TaskP_Handle	TaskP_selfmacro (void)
	Function returns the Task handle of current task.This is an inline function. More...
void	TaskP_yield (void)
	Function Yield processor to equal priority task. More...
uint32_t	TaskP_isTerminated (TaskP_Handle handle)
	Check if task is terminated. More...
uint32_t	TaskP_disable (void)
	Disable the task scheduler. More...
void	TaskP_restore (uint32_t key)
	Restore Task scheduling state. More...
uint32_t	TaskP_getTaskStackHighWatermark (TaskP_Handle handle)
	Return the task stack high watermark value (in bytes) More...

Typedefs
typedef void *	TaskP_Handle
	Opaque client reference to an instance of a TaskP. More...
typedef unsigned long	TaskP_Privilege_Mode
	[SafeRTOS only] Privilege of the task in safertos More...
typedef void(*	TaskP_Fxn) (void *arg0, void *arg1)
	Prototype for TaskP function. More...

Enumerations
enum	TaskP_Status { TaskP_OK = 0, TaskP_FAILURE = (-(int32_t)1) }
	Status codes for TaskP APIs. More...

Macros
#define	OS_TICKS_IN_MILLI_SEC   1 /* 1000us tick */
	Number Ticks by OS in 1 millisecond. More...

Macro Definition Documentation

OS_TICKS_IN_MILLI_SEC

#define OS_TICKS_IN_MILLI_SEC   1 /* 1000us tick */

Number Ticks by OS in 1 millisecond.

Typedef Documentation

TaskP_Handle

typedef void* TaskP_Handle

Opaque client reference to an instance of a TaskP.

A TaskP_Handle returned from the TaskP_create represents that instance and is used in the other instance based functions

TaskP_Privilege_Mode

typedef unsigned long TaskP_Privilege_Mode

[SafeRTOS only] Privilege of the task in safertos

A TaskP_Privilege_Mode can have two values as below. mpuUNPRIVILEGED_TASK value is 0. mpuPRIVILEGED_TASK value is 1.

TaskP_Fxn

typedef void( * TaskP_Fxn) (void *arg0, void *arg1)

Prototype for TaskP function.

Enumeration Type Documentation

TaskP_Status

enum TaskP_Status

Status codes for TaskP APIs.

Enumerator
TaskP_OK	API completed successfully
TaskP_FAILURE	API failed

Function Documentation

TaskP_create()

TaskP_Handle TaskP_create	(	TaskP_Fxn	taskfxn,
		const TaskP_Params *	params
	)

Function to create a task.

Parameters

taskfxn	Function pointer of the task.
params	Pointer to the instance configuration parameters.

Returns

A TaskP_Handle on success or a NULL on an error

TaskP_delete()

TaskP_Status TaskP_delete

(

TaskP_Handle *

handle

)

Function to delete a task.

Parameters

handle

A TaskP_Handle returned from TaskP_create

Returns

Status of the functions

• TaskP__OK: Deleted the semaphore instance
• TaskP_FAILURE: Failed to delete the semaphore instance

TaskP_Params_init()

void TaskP_Params_init

(

TaskP_Params *

params

)

Initialize params structure to default values.

Parameters

params

Pointer to the instance configuration parameters.

TaskP_sleep()

void TaskP_sleep

(

uint32_t

timeout

)

Function for Task sleep in units of OS tick.

Parameters

timeout

sleep ticks.

TaskP_sleepInMsecs()

void TaskP_sleepInMsecs

(

uint32_t

timeoutInMsecs

)

Function for Task sleep in units of msecs.

Parameters

timeoutInMsecs

sleep in units of msecs.

TaskP_setPrio()

void TaskP_setPrio	(	TaskP_Handle	handle,
		uint32_t	priority
	)

Function to update Task priority.

Parameters

handle	A TaskP_Handle returned from TaskP_create.
priority	New priority to be set.

TaskP_self()

TaskP_Handle TaskP_self

(

void

)

Function returns the Task handle of current task.

TaskP_selfmacro()

TaskP_Handle TaskP_selfmacro

(

void

)

Function returns the Task handle of current task.This is an inline function.

TaskP_yield()

void TaskP_yield

(

void

)

Function Yield processor to equal priority task.

TaskP_isTerminated()

uint32_t TaskP_isTerminated

(

TaskP_Handle

handle

)

Check if task is terminated.

Typically a task MUST be terminated before it can be deleted.

Returns

0: task is not terminated, 1: task is terminated

TaskP_disable()

uint32_t TaskP_disable

(

void

)

Disable the task scheduler.

Control Task scheduling. This disables all other Tasks from running until TaskP_restore is called. Interrupts can still run.

Returns

key for use with restore

TaskP_restore()

void TaskP_restore

(

uint32_t

key

)

Restore Task scheduling state.

Resumes the scheduler after it was disabled using a call to TaskP_disable.

Parameters

key	key to restore previous Task scheduler state

TaskP_getTaskStackHighWatermark()

uint32_t TaskP_getTaskStackHighWatermark

(

TaskP_Handle

handle

)

Return the task stack high watermark value (in bytes)

This represents the smallest distance in bytes thus far before experiencing a stack overflow

Parameters

handle

A TaskP_Handle returned from TaskP_create.