IAR PowerPac RTOS User Guide

More documents

Recommendations

Info

Additional InformationThe pMemBlock pointer has to be the one that was delivered form any retrival function described above. The pointermust not be modified between allocation and release. The memory block becomes available for other tasks waiting fora memory block from the pool. If any task is waiting for a fixed memory block, it is activated according to the rules ofthe scheduler.OS_MEMF_FreeBlock()DescriptionReleases a memory block that was previously allocated. The memory pool does not need to be denoted.Prototypevoid OS_MEMF_FreeBlock (void* pMemBlock);ParameterDescriptionpMemBlockPointer to the memory block to free.Table 106: OS_MEMF_FreeBlock() parameter listAdditional InformationThe pMemBlock pointer has to be the one that was delivered form any retrieval function described above. The pointermust not be modified between allocation and release. This function may be used instead of OS_MEMF_Release(). Ithas the advantage that only one parameter is needed. IAR PowerPac RTOS itself will find the associated memory pool.The memory block becomes available for other tasks waiting for a memory block from the pool. If any task is waitingfor a fixed memory block, it is activated according to the rules of the scheduler.OS_MEMF_GetNumBlocks()DescriptionInformation routine to examine the total number of available memory blocks in the pool.Prototypeint OS_MEMF_GetNumBlocks (OS_MEMF* pMEMF);ParameterDescriptionpMEMFTable 107: OS_MEMF_GetNumBlocks() parameter listReturn valueReturns the number of blocks in the specified memory pool. This is the value that was given as parameter duringcreation of the memory pool.OS_MEMF_GetBlockSize()DescriptionInformation routine to examine the size of one memory block in the pool.Prototypeint OS_MEMF_GetBlockSize (OS_MEMF* pMEMF);ParameterDescriptionpMEMFTable 108: OS_MEMF_GetBlockSize() parameter listReturn valueSize in bytes of one memory block in the specified memory pool. This is the value of the parameter when the memorypool was created.OS_MEMF_GetNumFreeBlocks()DescriptionPointer to the control data structure of memory pool.Pointer to the control data structure of memory pool.Information routine to examine the number of free memory blocks in the pool.94IAR PowerPac RTOSfor ARM CoresPPRTOS-2
Fixed block size memory poolsPrototypeint OS_MEMF_GetNumFreeBlocks (OS_MEMF* pMEMF);ParameterDescriptionpMEMFPointer to the control data structure of memory pool.Table 109: OS_MEMF_GetNumFreeBlocks() parameter listReturn valueThe number of free blocks actually available in the specified memory pool.OS_MEMF_GetMaxUsed()DescriptionInformation routine to examine the amount of memory blocks in the pool that were used concurrently since creation ofthe pool.Prototypeint OS_MEMF_GetMaxUsed (OS_MEMF* pMEMF);ParameterDescriptionpMEMFTable 110: OS_MEMF_GetMaxUsed() parameter listReturn valueMaximum number of blocks in the specified memory pool that were used concurrently since the pool was created.OS_MEMF_IsInPool()DescriptionInformation routine to examine whether a memory block reference pointer belongs to the specified memory pool.Prototypechar OS_MEMF_IsInPool (OS_MEMF* pMEMF,void* pMemBlock);ParameterDescriptionpMEMFpMemBlockTable 111: OS_MEMF_IsInPool() parameter listReturn value0: Pointer does not belong to memory pool.1: Pointer belongs to the pool.Pointer to the control data structure of memory pool.Pointer to the control data structure of memory pool.Pointer to a memory block that should be checkedPPRTOS-295
Page 1 and 2:
IAR PowerPac RTOSUser GuidePPRTOS-2
Page 3 and 4:
PrefaceWelcome to the IAR PowerPac
Page 5 and 6:
ContentsPreface ...................
Page 7 and 8:
ContentsOS_WaitCSema() ............
Page 9 and 10:
ContentsOS_LeaveInterrupt() .......
Page 11 and 12:
Introduction to IAR PowerPacRTOSWha
Page 13 and 14:
Basic conceptsTasksIn this context,
Page 15 and 16:
Basic conceptsPREEMPTIVES MULTITASK
Page 17 and 18:
Basic conceptsMAILBOXES AND QUEUESA
Page 19 and 20:
Basic conceptsThe active task may b
Page 21 and 22:
Basic conceptsThe flowchart below i
Page 23 and 24:
Basic conceptsLIST OF LIBRARIESIn y
Page 25 and 26:
Task routinesIntroductionA task tha
Page 27 and 28:
Task routinesOS_CREATETASK() can be
Page 29 and 30:
Task routinesExampleThe following e
Page 31 and 32:
Task routinesExampleint sec,min;voi
Page 33 and 34:
Task routinesAdditional Information
Page 35 and 36:
Task routinesReturn valueOS_TASKID:
Page 37 and 38:
Software timersSoftware timerA soft
Page 39 and 40:
Software timers#define OS_CREATETIM
Page 41 and 42:
Software timersOS_SetTimerPeriod()D
Page 43 and 44: Software timersAdditional Informati
Page 45 and 46: Software timersAdditional Informati
Page 47 and 48: Software timersExampleOS_TIMER TIME
Page 49 and 50: Resource semaphoresIntroductionReso
Page 51 and 52: Resource semaphoresResource semapho
Page 53 and 54: Resource semaphoresOS_Request()Desc
Page 55 and 56: Counting SemaphoresIntroductionCoun
Page 57 and 58: Counting SemaphoresPrototypevoid OS
Page 59 and 60: Counting SemaphoresReturn value0: I
Page 61 and 62: MailboxesWhy mailboxes?In the prece
Page 63 and 64: MailboxesMailboxes API function ove
Page 65 and 66: MailboxesExampleSingle-byte mailbox
Page 67 and 68: MailboxesPrototypevoid OS_GetMail (
Page 69 and 70: MailboxesOS_WaitMail()DescriptionWa
Page 71 and 72: QueuesWhy queues?In the preceding c
Page 73 and 74: QueuesReturn valueThe size of the r
Page 75 and 76: QueuesExamplestatic void MemoryTask
Page 77 and 78: Task eventsIntroductionTask events
Page 79 and 80: Task eventsExampleOS_WaitEventTimed
Page 81 and 82: Task eventsPrototypechar OS_ClearEv
Page 83 and 84: Event objectsIntroductionEvent obje
Page 85 and 86: Event objectsExampleif (OS_EVENT_Wa
Page 87 and 88: Event objectsExampleOS_EVENT_Reset(
Page 89 and 90: Heap type memory managementANSI C o
Page 91 and 92: Fixed block size memory poolsIntrod
Page 93: Fixed block size memory poolsProtot
Page 97 and 98: StacksIntroductionThe stack is the
Page 99 and 100: InterruptsIntroductionIn this chapt
Page 101 and 102: InterruptsRules for interrupt handl
Page 103 and 104: InterruptsOS_LeaveInterruptNoSwitch
Page 105 and 106: InterruptsNesting interrupt routine
Page 107 and 108: Critical RegionsIntroductionCritica
Page 109 and 110: System variablesIntroductionThe sys
Page 111 and 112: Configuration for your targetsystem
Page 113 and 114: Time measurementIntroductionIAR Pow
Page 115 and 116: Time measurementPrototypeU32 OS_Get
Page 117 and 118: Time measurementPrototypeOS_U32 OS_
Page 119 and 120: RTOS-aware debuggingThis chapter de
Page 121 and 122: RTOS-aware debuggingTimersA softwar
Page 123 and 124: DebuggingRuntime errorsSome error c
Page 125 and 126: DebuggingValue Define Description17
Page 127 and 128: Performance and resource usageThis
Page 129 and 130: Performance and resource usageThe c
Page 131 and 132: Performance and resource usage*/sta
Page 133 and 134: ReentranceAll routines that can be
Page 135 and 136: LimitationsThe following limitation
Page 137 and 138: Source code of kernel and libraryIn
Page 139 and 140: Additional modulesKeyboard manager:
Page 141 and 142: FAQ (frequently asked questions)Q:
Page 143 and 144: GlossaryActive TaskCooperativemulti
Page 145 and 146:
IndexIndexAAdditional modules . . .
Page 147:
IndexOS_WaitSingleEventTimed(). . .
show all

IAR PowerPac RTOS User Guide

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?