CrossWorks for ARM User Guide

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ctl_semaphore_wait(&s1, 0, 0);This example will block the task if the semaphore is zero, otherwise it will decrementthe semaphore and continue execution.if (ctl_semaphore_wait(&s1, 1, ctl_get_current_time()+1000)==0){// timeout occured}This example uses a timeout and tests the return result to see if the timeout occured.Task synchronisation in an interrupt service routineThe following example illustrates synchronising a task with a function called from aninterrupt service routine.CTL_SEMAPHORE_t s1;void ISRfn(){// do workctl_semaphore_signal(&s1);}void task1(void *p){while (1){ctl_semaphore_wait(&s1, 0, 0);}}…Resource serialisationThe following example illustrates resource serialisation of two tasks.CTL_SEMAPHORE_t s1=1;void task1(void){<strong>for</strong> (;;){ctl_semaphore_wait(&s1, 0, 0);/* resource has now been acquired */…ctl_semaphore_signal(&s1);/* resource has now been released */}}void task2(void){<strong>for</strong> (;;){ctl_semaphore_wait(&s1);/* resource has now been acquired */…218 Chapter 20 Semaphores
}}ctl_semaphore_signal(&s1);/* resource has now been released */intmain(void){…ctl_semaphore_init(&s1,1);}…Note that s1 is initialised to one, without this neither task would acquire the resource.Chapter 20C library support219
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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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DescriptionTargetInterface.setICEBr
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
Page 193 and 194: Menu command Keystroke DescriptionL
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
Page 201 and 202: Menu command Keystroke DescriptionS
Page 203 and 204: Debug Control commandsMenu command
Page 205 and 206: The Debug Windows menuDebug Windows
Page 207 and 208: Menu command Keystroke DescriptionD
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 and 224: ctl_events_set_clear(&e1, 1, 0);}vo
Page 225: 20SemaphoresA semaphore is a counte
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
Page 235 and 236: {…ctl_byte_queue_init(&m1,queue,
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
Page 252 and 253: isalnumSynopsisDescriptionPortabili
Page 254 and 255: DescriptionPortabilityispunct retur
Page 256 and 257: The header file defines the macros
Page 258 and 259: INT_MAXSynopsisDescriptionPortabili
Page 260 and 261: UINT_MAXSynopsisDescriptionPortabil
Page 262 and 263: coshfsinhsinhftanhtanhfCompute hype
Page 264 and 265: DescriptionFast math librarybehavio
Page 266 and 267: atanSynopsisDescriptionPortability#
Page 268 and 269: atanhfSynopsisDescriptionFast math
Page 270 and 271: Fast math librarybehaviorIEC 60559
Page 272 and 273: fmaxSynopsis#include double fmax(do
Page 274 and 275: 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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