IAR PowerPac RTOS User Guide

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136IAR PowerPac RTOSfor ARM CoresPPRTOS-2
Source code of kernel and libraryIntroductionIAR PowerPac RTOS is available in two versions:1 Object version: Object code + hardware initialization source.2 Full source version: Complete source code.Because this document describes the object version, the internal data structures are not explained in detail. The objectversion offers the full functionality of IAR PowerPac RTOS including all supported configuration of the compiler, thedebug libraries as described and the source code for idle task and hardware initialization. However, the object versiondoes not allow source-level debugging of the library routines and the kernel.The full source version gives you the ultimate options: IAR PowerPac RTOS can be recompiled for different data sizes;different compile options give you full control of the generated code, making it possible to optimize the system forversatility or minimum memory requirements. You can debug the entire system and even modify it for new memorymodels or other CPUs.The source code distribution of IAR PowerPac RTOS contains the following additional files:● The Src\CPU folder contains all source code part of the distribution. It also contains DOS batch files that can beused for rebuilding the complete set of the IAR PowerPac RTOS libraries. An example workspace for building alibrary is also available.● The CPU folder contains all CPU and compiler specific source code and header files used for building the IARPowerPac RTOS libraries. Normally, you should not modify any of the files in the CPU folder.● The GenOSSrc folder contains all IAR PowerPac RTOS source files.Building IAR PowerPac RTOS librariesIAR PowerPac RTOS is shipped with different prebuilt libraries. The IAR PowerPac RTOS libraries can only be builtif you have purchased a source code version of IAR PowerPac RTOS.Batch files for building the library from the command line are provided. The batch files are located under\ARM\PowerPac\RTOS\Src\. To start the batch build click BuildLibs.bat. You should be ableto build the library without any error or warning messages. If you have changed the default installation path of IARPowerPac RTOS the batch build will fail, because the _TOOLPATH_ variable in BuildLibs.bat points to the maindirectory of your compiler relative to the default installation path of IAR PowerPac RTOS. Open BuildLibs.bat andmodify the _TOOLPATH_ variable. Nothing else should require changesMajor compile time switchesMany features of IAR PowerPac RTOS may be modified by compile-time switches. All of them are predefined toreasonable values in the distribution of IAR PowerPac RTOS. The compile-time switches must be changed in RTOS.h,or has to be passed as parameters during the library build process. IAR PowerPac RTOS sources have to be recompiledwith the modified switches.OS_RR_SUPPORTEDThis switch defines whether round robin scheduling algorithm is supported. All IAR PowerPac RTOS versions enableround robin scheduling by default. If you never use round robin scheduling and all of your tasks run on differentindividual priorities, you may disable round robin scheduling by defining this switch to 0. This will save RAM andROM and will also speed up the task-switching process. Ensure that none of your tasks ever run on the same prioritywhen you disable round robin scheduling.PPRTOS-2 137
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IAR PowerPac RTOSUser GuidePPRTOS-2
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PrefaceWelcome to the IAR PowerPac
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ContentsPreface ...................
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ContentsOS_WaitCSema() ............
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ContentsOS_LeaveInterrupt() .......
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Introduction to IAR PowerPacRTOSWha
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Basic conceptsTasksIn this context,
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Basic conceptsPREEMPTIVES MULTITASK
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Basic conceptsMAILBOXES AND QUEUESA
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Basic conceptsThe active task may b
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Basic conceptsThe flowchart below i
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Basic conceptsLIST OF LIBRARIESIn y
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Task routinesIntroductionA task tha
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Task routinesOS_CREATETASK() can be
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Task routinesExampleThe following e
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Task routinesExampleint sec,min;voi
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Task routinesAdditional Information
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Task routinesReturn valueOS_TASKID:
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Software timersSoftware timerA soft
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Software timers#define OS_CREATETIM
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Software timersOS_SetTimerPeriod()D
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Software timersAdditional Informati
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Software timersAdditional Informati
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Software timersExampleOS_TIMER TIME
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Resource semaphoresIntroductionReso
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Resource semaphoresResource semapho
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Resource semaphoresOS_Request()Desc
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Counting SemaphoresIntroductionCoun
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Counting SemaphoresPrototypevoid OS
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Counting SemaphoresReturn value0: I
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MailboxesWhy mailboxes?In the prece
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MailboxesMailboxes API function ove
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MailboxesExampleSingle-byte mailbox
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MailboxesPrototypevoid OS_GetMail (
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MailboxesOS_WaitMail()DescriptionWa
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QueuesWhy queues?In the preceding c
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QueuesReturn valueThe size of the r
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QueuesExamplestatic void MemoryTask
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Task eventsIntroductionTask events
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Task eventsExampleOS_WaitEventTimed
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Task eventsPrototypechar OS_ClearEv
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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 and 94: Fixed block size memory poolsProtot
Page 95 and 96: 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: LimitationsThe following limitation
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(). . .
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IAR PowerPac RTOS User Guide

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