CrossWorks for ARM User Guide

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}....ctl_events_init(&e1, 1);....Note that e1 is initialised with the event set—without this neither task would acquirethe resource.216 Chapter 19 Event sets
20SemaphoresA semaphore is a counter which tasks can wait for to be non-zero. When a semaphoreis non-zero and a task waits on it then the semaphore value is decremented and thetask continues execution. When a semaphore is zero and a task waits on it then thetask will be suspended until the semaphore is signalled. When a semaphore issignalled and no tasks are waiting for it then the semaphore value is incremented.When a semaphore is signalled and tasks are waiting then one of the tasks is maderunnable.You allocate a semaphore by declaring it as a C variableCTL_SEMAPHORE_t s1;An CTL_SEMAPHORE_t is a synonym for an unsigned type, so the maximum valueof the counter is dependent upon the word size of the processor (either 16 or 32 bits).You can initialise a semaphore using the ctl_semaphore_init function.ctl_semaphore_init(&s1, 1);Note that initialisation should be done before any tasks can use a semaphore.You can signal a semaphore using the ctl_semaphore_signal function.ctl_semaphore_signal(&s1);The highest priority task waiting on the semphore pointed at by s1 will be maderunnable by this call. If no tasks are waiting on the semaphore then the semaphorevalue is incremented.You can wait for a semaphore with an optional timeout using the ctl_semaphore_waitfunction.
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CrossWorks for ARMUser GuideRowley
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38 The status bar40 The editing wor
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Chapter 16 173 CrossStudio menu sum
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Part VIAppendicesChapter 35 337 Fil
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1IntroductionThis guide is divided
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•Integrated Debugger The debugger
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After purchasing CrossWorksWhen you
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•Sequences which may be repeated
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Part IICrossStudio ReferenceThis se
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2CrossStudio TutorialCrossStudio al
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The Links to system files group sho
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•In the Project Explorer, right c
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•Select the main.c file.•Click
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Building projectsNow that the proje
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Project code and data sizesDevelope
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Displaying the Symbol BrowserTo dis
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Printing Symbol Browser contentsYou
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•Type F5.The workspace will chang
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Setting up againWhat we'll now do i
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Stopping and starting debuggingYou
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3OverviewThis section introduces th
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The menu barThe menu bar conatins d
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PanelCaret positionCaps lock status
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Changing to Multiple Document Works
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4Project managementCrossWorks has a
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•Combining — a project that can
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•In the New Project dialog, selec
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•Click on the project item to rem
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There is a special configuration na
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Project dependencies and build orde
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•Click on the Project tab.•Sele
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5Building projectsCrossStudio provi
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•From the Build menu, select Buil
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6Source code controlCrossWorks supp
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—or—•In the Project Explorer,
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7Debug expressionsThe debugger can
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8Basic editingCrossStudio has a bui
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KeystrokeLeftRightHomeEndPageUpPage
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—or—•From the Edit menu, clic
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•Either click somewhere in the do
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To cut whole lines from the current
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•From the Edit menu, click Advanc
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•Set the Indent Closing Brace pro
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•Select Edit | Insert File menu i
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•If the search will be carried ou
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Advanced editor featuresCode Templa
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•Select Edit > Advanced > Uncomme
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9Memory map editorMemory map files
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•Input Section Names. The optiona
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10Package managementCrossWorks can
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11Linking and Section placementExec
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The startup code will need to copy
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12CrossStudio WindowsThis section i
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•Repeatedly type Ctrl+Shift+V to
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•Enable, disable and delete exist
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Editing a breakpointTo edit the pro
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—or—•From the Breakpoints win
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—or—•On the Debug tool bar, c
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—or—•On the Debug Location to
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Globals tool barButtonDescriptionDi
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Locals tool barButtonDescriptionDis
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Memory window updatesThe memory win
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Showing the Registers windowTo disp
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clicking on one of the entries in t
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Watch tool barButtonDescriptionDisp
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Expressions you can watchHelp windo
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Output windowThe Output window cont
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The Project Explorer tool barButton
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Source navigator windowOne of the b
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—or—•On the Source Navigator
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variables, the range is the range o
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Grouping symbols by source fileWhen
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•In the Symbol Browser, right cli
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—or—•In the Targets window, c
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Controlling target connectionsReset
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13Target interfacesA target interfa
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•Parallel Port Address The base a
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•Identify Target Specifies whethe
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•Processor Stop Time The timeout
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14ARM Target SupportWhen a target s
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•fiq_handler - This is the defaul
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There is a Heap Size linker project
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Target script fileThe target interf
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efore the debugger starts accessing
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DescriptionTargetInterface.peekByte
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Page 175 and 176: •Fast Comms Channel Loader — Th
Page 177 and 178: 15DialogsDebug file search editorWh
Page 179 and 180: •Show full path in title bar. Ena
Page 181 and 182: 16CrossStudio menu summaryThe follo
Page 183 and 184: Menu command Keystroke DescriptionR
Page 185 and 186: Menu command Keystroke DescriptionC
Page 187 and 188: Menu command Keystroke DescriptionP
Page 189 and 190: The Edit Selection menuEdit Selecti
Page 191 and 192: Advanced menuThe Advanced menu prov
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Page 195 and 196: The Browser menuBrowser commandsMen
Page 197 and 198: Search menu commandsMenu command Ke
Page 199 and 200: The Build menuBuild menu commandsMe
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Page 203 and 204: Debug Control commandsMenu command
Page 205 and 206: The Debug Windows menuDebug Windows
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Page 209 and 210: The Help menuHelp menu commandsMenu
Page 211 and 212: Part IIITasking Library TutorialThi
Page 213 and 214: 17OverviewThe CTL enables your appl
Page 215 and 216: Timer supportIf your application ca
Page 217 and 218: 18TasksEach task has a correspondin
Page 219 and 220: #include void task1(void *p){// tas
Page 221 and 222: 19Event setsAn event set is a means
Page 223: ctl_events_set_clear(&e1, 1, 0);}vo
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Page 229 and 230: 21Message queuesA message queue is
Page 231 and 232: void task2(void){void *msg;…ctl_m
Page 233 and 234: 22Byte queuesA byte queue is a stru
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Page 237 and 238: 23Global interrupts controlThe Cros
Page 239 and 240: 24Timer supportThe current time is
Page 241 and 242: 25Programmable interrupt handlingTh
Page 243 and 244: 26Low-level interrupt handlingIf yo
Page 245 and 246: 27Memory areasMemory areas provide
Page 247: Part IVLibrary ReferenceLibrary Ref
Page 250 and 251: - DiagnosticsThe header file defin
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Page 254 and 255: DescriptionPortabilityispunct retur
Page 256 and 257: The header file defines the macros
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Page 260 and 261: UINT_MAXSynopsisDescriptionPortabil
Page 262 and 263: coshfsinhsinhftanhtanhfCompute hype
Page 264 and 265: DescriptionFast math librarybehavio
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Page 268 and 269: atanhfSynopsisDescriptionFast math
Page 270 and 271: Fast math librarybehaviorIEC 60559
Page 272 and 273: fmaxSynopsis#include double fmax(do
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frexp stores power of two in the in
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ldexpSynopsis#include double ldexp(
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IEC 60559 mathlibrary behaviorPorta
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If x = +Infinity and y < 0 and y N
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sinhfSynopsis#include float sinhf(f
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tanhfSynopsis#include float tanhf(f
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- Variable argumentsThe header file
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The behaviour of va_start and va_ar
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Some CrossWorks library variants do
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produces ‘INF’ or ‘NAN’ ins
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A directive that is a conversion sp
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•‘[’. Matches a nonempty sequ
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Portabilityputchar conforms to ISO/
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DescriptionPortabilitysscanf reads
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DescriptionNotesPortabilityvsprintf
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Pseudo-random sequence generation f
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DescriptionPortabilitycalloc alloca
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Description ldiv_t stores the quoti
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See Also srand (page 302) RAND_MAX
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strtofSynopsisDescriptionPortabilit
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strtollSynopsisDescription#include
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If the subject sequence begins with
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Descriptionultoa converts val to a
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memchr returns a pointer to the loc
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DescriptionPortabilitystrcmp compar
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strncmp returns an integer greater
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strtok then searches from there for
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29CrossBuildThe command line progra
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30CrossLoadCrossLoad is a command l
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This command will produce a list of
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31mkhdr - C/C++ header file generat
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32mkpkg - package creatorTo create
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33GCC Online Documentation
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34BINUTILS Online Documentation
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Part VIAppendicesAppendices
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•access The permissable access ty
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ProgramSection elements have the fo
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The next entry is the projects elem
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344 Chapter 35 File formats
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Property Type Save NameExclude From
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Property Type Save NameInclude Debu
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Property Type Save NameSuppress War
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Property Name Type Save NameARM Arc
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Property Name Type Save NameARM Flo
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Property Name Type Save NameGenerat
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Property Name Type Save NameOptimiz
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Property Type Save NameUndefine All
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Property Type Save NameZeroed Secti
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Property Type Save NameLoad Address
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Library PropertiesLibrary OptionsTh
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Printf/Scanf OptionsProperty Type S
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Property Type Save NameScanf Intege
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Property Type Save NameAdditional O
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Property Type Save NameGenerate Map
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Property Type Save NameMemory Map F
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Property Type Save NameStack Size (
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Property Type Save NamePackage Memb
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Combining OptionsThese properties a
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Target OptionsProperty Type Save Na
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Property Type Save NameARM Debug In
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Property Type Save NameDebug Handle
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Property Type Save NameJTAG Data Bi
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Property Type Save NameJTAG Instruc
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Property Type Save NameLast Loader
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Property Type Save NameLoader File
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Simulator OptionsProperty Type Save
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Keystrokes Menu DescriptionCtrl+Pag
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Keystrokes Menu DescriptionCtrl+F E
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Keystrokes Menu DescriptionEdit |Ad
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Keystrokes Menu ActionF3BackspaceDe
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408 Chapter 39 Glossary
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