Microchip® Advanced Software Framework

freertos-7.4.2/Source/include/task.h File Reference
#include "portable.h"
#include "list.h"

Data Structures

struct  xMEMORY_REGION
 
struct  xTASK_PARAMTERS
 
struct  xTIME_OUT
 

Macros

#define taskDISABLE_INTERRUPTS()   portDISABLE_INTERRUPTS()
 
#define taskENABLE_INTERRUPTS()   portENABLE_INTERRUPTS()
 
#define taskENTER_CRITICAL()   portENTER_CRITICAL()
 
#define taskEXIT_CRITICAL()   portEXIT_CRITICAL()
 
#define taskSCHEDULER_NOT_STARTED   0
 
#define taskSCHEDULER_RUNNING   1
 
#define taskSCHEDULER_SUSPENDED   2
 
#define taskYIELD()   portYIELD()
 
#define tskIDLE_PRIORITY   ( ( unsigned portBASE_TYPE ) 0U )
 
#define tskKERNEL_VERSION_NUMBER   "V7.4.2"
 
#define xTaskCreate(pvTaskCode, pcName, usStackDepth, pvParameters, uxPriority, pxCreatedTask)   xTaskGenericCreate( ( pvTaskCode ), ( pcName ), ( usStackDepth ), ( pvParameters ), ( uxPriority ), ( pxCreatedTask ), ( NULL ), ( NULL ) )
 
#define xTaskCreateRestricted(x, pxCreatedTask)   xTaskGenericCreate( ((x)->pvTaskCode), ((x)->pcName), ((x)->usStackDepth), ((x)->pvParameters), ((x)->uxPriority), (pxCreatedTask), ((x)->puxStackBuffer), ((x)->xRegions) )
 

Typedefs

typedef struct xMEMORY_REGION xMemoryRegion
 
typedef void * xTaskHandle
 
typedef struct xTASK_PARAMTERS xTaskParameters
 
typedef struct xTIME_OUT xTimeOutType
 

Enumerations

enum  eSleepModeStatus {
  eAbortSleep = 0,
  eStandardSleep,
  eNoTasksWaitingTimeout,
  eAbortSleep = 0,
  eStandardSleep,
  eNoTasksWaitingTimeout,
  eAbortSleep = 0,
  eStandardSleep,
  eNoTasksWaitingTimeout,
  eAbortSleep = 0,
  eStandardSleep,
  eNoTasksWaitingTimeout,
  eAbortSleep = 0,
  eStandardSleep,
  eNoTasksWaitingTimeout
}
 
enum  eTaskState {
  eRunning = 0,
  eReady,
  eBlocked,
  eSuspended,
  eDeleted,
  eRunning = 0,
  eReady,
  eBlocked,
  eSuspended,
  eDeleted,
  eRunning = 0,
  eReady,
  eBlocked,
  eSuspended,
  eDeleted,
  eRunning = 0,
  eReady,
  eBlocked,
  eSuspended,
  eDeleted,
  eRunning = 0,
  eReady,
  eBlocked,
  eSuspended,
  eDeleted,
  eInvalid,
  eRunning = 0,
  eReady,
  eBlocked,
  eSuspended,
  eDeleted
}
 

Functions

eSleepModeStatus eTaskConfirmSleepModeStatus (void)
 
eTaskState eTaskGetState (xTaskHandle xTask) PRIVILEGED_FUNCTION
 task. More...
 
signed char * pcTaskGetTaskName (xTaskHandle xTaskToQuery)
 
unsigned portBASE_TYPE uxTaskGetNumberOfTasks (void) PRIVILEGED_FUNCTION
 
unsigned portBASE_TYPE uxTaskGetStackHighWaterMark (xTaskHandle xTask) PRIVILEGED_FUNCTION
 task.h More...
 
unsigned portBASE_TYPE uxTaskGetTaskNumber (xTaskHandle xTask)
 
unsigned portBASE_TYPE uxTaskPriorityGet (xTaskHandle xTask) PRIVILEGED_FUNCTION
 
void vTaskAllocateMPURegions (xTaskHandle xTask, const xMemoryRegion *const pxRegions) PRIVILEGED_FUNCTION
 
void vTaskDelay (portTickType xTicksToDelay) PRIVILEGED_FUNCTION
 
void vTaskDelayUntil (portTickType *const pxPreviousWakeTime, portTickType xTimeIncrement) PRIVILEGED_FUNCTION
 
void vTaskDelete (xTaskHandle xTaskToDelete) PRIVILEGED_FUNCTION
 
void vTaskEndScheduler (void) PRIVILEGED_FUNCTION
 
void vTaskGetRunTimeStats (signed char *pcWriteBuffer) PRIVILEGED_FUNCTION
 
void vTaskIncrementTick (void) PRIVILEGED_FUNCTION
 
void vTaskList (signed char *pcWriteBuffer) PRIVILEGED_FUNCTION
 
void vTaskMissedYield (void) PRIVILEGED_FUNCTION
 
void vTaskPlaceOnEventList (const xList *const pxEventList, portTickType xTicksToWait) PRIVILEGED_FUNCTION
 
void vTaskPlaceOnEventListRestricted (const xList *const pxEventList, portTickType xTicksToWait) PRIVILEGED_FUNCTION
 
void vTaskPriorityDisinherit (xTaskHandle *const pxMutexHolder) PRIVILEGED_FUNCTION
 
void vTaskPriorityInherit (xTaskHandle *const pxMutexHolder) PRIVILEGED_FUNCTION
 
void vTaskPrioritySet (xTaskHandle xTask, unsigned portBASE_TYPE uxNewPriority) PRIVILEGED_FUNCTION
 
void vTaskResume (xTaskHandle xTaskToResume) PRIVILEGED_FUNCTION
 
void vTaskSetTaskNumber (xTaskHandle xTask, unsigned portBASE_TYPE uxHandle)
 
void vTaskSetTimeOutState (xTimeOutType *const pxTimeOut) PRIVILEGED_FUNCTION
 
void vTaskStartScheduler (void) PRIVILEGED_FUNCTION
 
void vTaskStepTick (portTickType xTicksToJump)
 
void vTaskSuspend (xTaskHandle xTaskToSuspend) PRIVILEGED_FUNCTION
 
void vTaskSuspendAll (void) PRIVILEGED_FUNCTION
 
void vTaskSwitchContext (void) PRIVILEGED_FUNCTION
 
portBASE_TYPE xTaskCallApplicationTaskHook (xTaskHandle xTask, void *pvParameter) PRIVILEGED_FUNCTION
 task.h More...
 
portBASE_TYPE xTaskCheckForTimeOut (xTimeOutType *const pxTimeOut, portTickType *const pxTicksToWait) PRIVILEGED_FUNCTION
 
signed portBASE_TYPE xTaskGenericCreate (pdTASK_CODE pxTaskCode, const signed char *const pcName, unsigned short usStackDepth, void *pvParameters, unsigned portBASE_TYPE uxPriority, xTaskHandle *pxCreatedTask, portSTACK_TYPE *puxStackBuffer, const xMemoryRegion *const xRegions) PRIVILEGED_FUNCTION
 
xTaskHandle xTaskGetCurrentTaskHandle (void) PRIVILEGED_FUNCTION
 
xTaskHandle xTaskGetIdleTaskHandle (void)
 xTaskGetIdleTaskHandle() is only available if INCLUDE_xTaskGetIdleTaskHandle is set to 1 in FreeRTOSConfig.h. More...
 
portBASE_TYPE xTaskGetSchedulerState (void) PRIVILEGED_FUNCTION
 
portTickType xTaskGetTickCount (void) PRIVILEGED_FUNCTION
 
portTickType xTaskGetTickCountFromISR (void) PRIVILEGED_FUNCTION
 
signed portBASE_TYPE xTaskIsTaskSuspended (xTaskHandle xTask) PRIVILEGED_FUNCTION
 task. More...
 
signed portBASE_TYPE xTaskRemoveFromEventList (const xList *const pxEventList) PRIVILEGED_FUNCTION
 
signed portBASE_TYPE xTaskResumeAll (void) PRIVILEGED_FUNCTION
 
portBASE_TYPE xTaskResumeFromISR (xTaskHandle xTaskToResume) PRIVILEGED_FUNCTION
 

#define taskDISABLE_INTERRUPTS ( )    portDISABLE_INTERRUPTS()
#define taskENABLE_INTERRUPTS ( )    portENABLE_INTERRUPTS()
#define taskENTER_CRITICAL ( )    portENTER_CRITICAL()
#define taskEXIT_CRITICAL ( )    portEXIT_CRITICAL()
#define taskSCHEDULER_NOT_STARTED   0
#define taskSCHEDULER_RUNNING   1
#define taskSCHEDULER_SUSPENDED   2
#define taskYIELD ( )    portYIELD()
#define tskIDLE_PRIORITY   ( ( unsigned portBASE_TYPE ) 0U )
#define tskKERNEL_VERSION_NUMBER   "V7.4.2"
#define xTaskCreate (   pvTaskCode,
  pcName,
  usStackDepth,
  pvParameters,
  uxPriority,
  pxCreatedTask 
)    xTaskGenericCreate( ( pvTaskCode ), ( pcName ), ( usStackDepth ), ( pvParameters ), ( uxPriority ), ( pxCreatedTask ), ( NULL ), ( NULL ) )
#define xTaskCreateRestricted (   x,
  pxCreatedTask 
)    xTaskGenericCreate( ((x)->pvTaskCode), ((x)->pcName), ((x)->usStackDepth), ((x)->pvParameters), ((x)->uxPriority), (pxCreatedTask), ((x)->puxStackBuffer), ((x)->xRegions) )

typedef struct xMEMORY_REGION xMemoryRegion
typedef void* xTaskHandle
typedef struct xTIME_OUT xTimeOutType

Enumerator
eAbortSleep 
eStandardSleep 
eNoTasksWaitingTimeout 
eAbortSleep 
eStandardSleep 
eNoTasksWaitingTimeout 
eAbortSleep 
eStandardSleep 
eNoTasksWaitingTimeout 
eAbortSleep 
eStandardSleep 
eNoTasksWaitingTimeout 
eAbortSleep 
eStandardSleep 
eNoTasksWaitingTimeout 
enum eTaskState
Enumerator
eRunning 
eReady 
eBlocked 
eSuspended 
eDeleted 
eRunning 
eReady 
eBlocked 
eSuspended 
eDeleted 
eRunning 
eReady 
eBlocked 
eSuspended 
eDeleted 
eRunning 
eReady 
eBlocked 
eSuspended 
eDeleted 
eRunning 
eReady 
eBlocked 
eSuspended 
eDeleted 
eInvalid 
eRunning 
eReady 
eBlocked 
eSuspended 
eDeleted 

eSleepModeStatus eTaskConfirmSleepModeStatus ( void  )
eTaskState eTaskGetState ( xTaskHandle  xTask)

task.

h

eTaskState eTaskGetState( xTaskHandle xTask );

INCLUDE_eTaskGetState must be defined as 1 for this function to be available. See the configuration section for more information.

Obtain the state of any task. States are encoded by the eTaskState enumerated type.

Parameters
xTaskHandle of the task to be queried.
Returns
The state of xTask at the time the function was called. Note the state of the task might change between the function being called, and the functions return value being tested by the calling task.
signed char* pcTaskGetTaskName ( xTaskHandle  xTaskToQuery)
unsigned portBASE_TYPE uxTaskGetNumberOfTasks ( void  )
unsigned portBASE_TYPE uxTaskGetStackHighWaterMark ( xTaskHandle  xTask)

task.h

unsigned portBASE_TYPE uxTaskGetStackHighWaterMark( xTaskHandle xTask );

INCLUDE_uxTaskGetStackHighWaterMark must be set to 1 in FreeRTOSConfig.h for this function to be available.

Returns the high water mark of the stack associated with xTask. That is, the minimum free stack space there has been (in words, so on a 32 bit machine a value of 1 means 4 bytes) since the task started. The smaller the returned number the closer the task has come to overflowing its stack.

Parameters
xTaskHandle of the task associated with the stack to be checked. Set xTask to NULL to check the stack of the calling task.
Returns
The smallest amount of free stack space there has been (in bytes) since the task referenced by xTask was created.
unsigned portBASE_TYPE uxTaskGetTaskNumber ( xTaskHandle  xTask)
unsigned portBASE_TYPE uxTaskPriorityGet ( xTaskHandle  xTask)
void vTaskAllocateMPURegions ( xTaskHandle  xTask,
const xMemoryRegion *const  pxRegions 
)
void vTaskDelay ( portTickType  xTicksToDelay)
void vTaskDelayUntil ( portTickType *const  pxPreviousWakeTime,
portTickType  xTimeIncrement 
)
void vTaskDelete ( xTaskHandle  xTaskToDelete)
void vTaskEndScheduler ( void  )
void vTaskGetRunTimeStats ( signed char *  pcWriteBuffer)
void vTaskIncrementTick ( void  )
void vTaskList ( signed char *  pcWriteBuffer)
void vTaskMissedYield ( void  )
void vTaskPlaceOnEventList ( const xList *const  pxEventList,
portTickType  xTicksToWait 
)
void vTaskPlaceOnEventListRestricted ( const xList *const  pxEventList,
portTickType  xTicksToWait 
)
void vTaskPriorityDisinherit ( xTaskHandle *const  pxMutexHolder)
void vTaskPriorityInherit ( xTaskHandle *const  pxMutexHolder)
void vTaskPrioritySet ( xTaskHandle  xTask,
unsigned portBASE_TYPE  uxNewPriority 
)
void vTaskResume ( xTaskHandle  xTaskToResume)
void vTaskSetTaskNumber ( xTaskHandle  xTask,
unsigned portBASE_TYPE  uxHandle 
)
void vTaskSetTimeOutState ( xTimeOutType *const  pxTimeOut)
void vTaskStartScheduler ( void  )
void vTaskStepTick ( portTickType  xTicksToJump)
void vTaskSuspend ( xTaskHandle  xTaskToSuspend)
void vTaskSuspendAll ( void  )
void vTaskSwitchContext ( void  )
portBASE_TYPE xTaskCallApplicationTaskHook ( xTaskHandle  xTask,
void *  pvParameter 
)

task.h

portBASE_TYPE xTaskCallApplicationTaskHook( xTaskHandle xTask, pdTASK_HOOK_CODE pxHookFunction );

Calls the hook function associated with xTask. Passing xTask as NULL has the effect of calling the Running tasks (the calling task) hook function.

pvParameter is passed to the hook function for the task to interpret as it wants.

portBASE_TYPE xTaskCheckForTimeOut ( xTimeOutType *const  pxTimeOut,
portTickType *const  pxTicksToWait 
)
signed portBASE_TYPE xTaskGenericCreate ( pdTASK_CODE  pxTaskCode,
const signed char *const  pcName,
unsigned short  usStackDepth,
void *  pvParameters,
unsigned portBASE_TYPE  uxPriority,
xTaskHandle pxCreatedTask,
portSTACK_TYPE *  puxStackBuffer,
const xMemoryRegion *const  xRegions 
)
xTaskHandle xTaskGetCurrentTaskHandle ( void  )
xTaskHandle xTaskGetIdleTaskHandle ( void  )

xTaskGetIdleTaskHandle() is only available if INCLUDE_xTaskGetIdleTaskHandle is set to 1 in FreeRTOSConfig.h.

Simply returns the handle of the idle task. It is not valid to call xTaskGetIdleTaskHandle() before the scheduler has been started.

portBASE_TYPE xTaskGetSchedulerState ( void  )
portTickType xTaskGetTickCount ( void  )
portTickType xTaskGetTickCountFromISR ( void  )
signed portBASE_TYPE xTaskIsTaskSuspended ( xTaskHandle  xTask)

task.

h

signed portBASE_TYPE xTaskIsTaskSuspended( xTaskHandle xTask );

Utility task that simply returns pdTRUE if the task referenced by xTask is currently in the Suspended state, or pdFALSE if the task referenced by xTask is in any other state.

signed portBASE_TYPE xTaskRemoveFromEventList ( const xList *const  pxEventList)
signed portBASE_TYPE xTaskResumeAll ( void  )
portBASE_TYPE xTaskResumeFromISR ( xTaskHandle  xTaskToResume)