CrossWorks for ARM User Guide

More documents

Recommendations

Info

int main(void){…ctl_set_isr(11,11, CTL_ISR_TRIGGER_FIXED, isr, 0);}ctl_unmask_isr(11);…The isr function is triggered from interrupt vector 11 and will run at priority 11. Whenthe function is run it enables interrupts which will allow higher priority interrupts totrigger whilst it is executing.234 Chapter 25 Programmable interrupt handling
26Low-level interrupt handlingIf your system doesn’t support a programmable interrupt controller and you wanttasks to be rescheduled when interrupts occur, you must save the register state of theCPU on entry to an interrupt service routine and increment the global variablectl_interrupt_count.When you are executing an interrupt service routine you must not call the taskinglibrary functions that may block (task_wait_events, task_wait_semaphore,task_post_message, task_receive_message, task_wait_timeout) — you can callother tasking library functions, but a task switch will only occur when the lastinterrupt handler has completed execution.Whilst you are executing an interrupt service routine you can allow interrupts of ahigher priority to occur by calling ctl_global_interrupts_re_enable_from_isr. Youmust also disable interrupts before exit from the interrupt service routine by callingctl_global_interrupts_un_re_enable_from_isr.In order to achieve a task switch from an interrupt service routine the ctl_exit_isrfunction must be jumped to as the last action of an interrupt service routine. Thisfunction must be passed a pointer to the saved registers.Interrupt service routine (ARM example)This example declares an ISR using the GCC syntax for declaring naked functions andaccessing assembly code instructions.void irq_handler(void) __attribute__((naked));voidirq_handler(void){asm("stmfd sp!, {r0-r12, lr}");asm("mrs r0, spsr");
Page 1:
CrossWorks for ARMUser GuideRowley
Page 4 and 5:
38 The status bar40 The editing wor
Page 6 and 7:
Chapter 16 173 CrossStudio menu sum
Page 8 and 9:
Part VIAppendicesChapter 35 337 Fil
Page 11 and 12:
1IntroductionThis guide is divided
Page 13 and 14:
•Integrated Debugger The debugger
Page 15 and 16:
After purchasing CrossWorksWhen you
Page 17 and 18:
•Sequences which may be repeated
Page 19 and 20:
Part IICrossStudio ReferenceThis se
Page 21 and 22:
2CrossStudio TutorialCrossStudio al
Page 23 and 24:
The Links to system files group sho
Page 25 and 26:
•In the Project Explorer, right c
Page 27 and 28:
•Select the main.c file.•Click
Page 29 and 30:
Building projectsNow that the proje
Page 31 and 32:
Project code and data sizesDevelope
Page 33 and 34:
Displaying the Symbol BrowserTo dis
Page 35 and 36:
Printing Symbol Browser contentsYou
Page 37 and 38:
•Type F5.The workspace will chang
Page 39 and 40:
Setting up againWhat we'll now do i
Page 41 and 42:
Stopping and starting debuggingYou
Page 43 and 44:
3OverviewThis section introduces th
Page 45 and 46:
The menu barThe menu bar conatins d
Page 47 and 48:
PanelCaret positionCaps lock status
Page 49 and 50:
Changing to Multiple Document Works
Page 51 and 52:
4Project managementCrossWorks has a
Page 53 and 54:
•Combining — a project that can
Page 55 and 56:
•In the New Project dialog, selec
Page 57 and 58:
•Click on the project item to rem
Page 59 and 60:
There is a special configuration na
Page 61 and 62:
Project dependencies and build orde
Page 63 and 64:
•Click on the Project tab.•Sele
Page 65 and 66:
5Building projectsCrossStudio provi
Page 67 and 68:
•From the Build menu, select Buil
Page 69 and 70:
6Source code controlCrossWorks supp
Page 71 and 72:
—or—•In the Project Explorer,
Page 73 and 74:
7Debug expressionsThe debugger can
Page 75 and 76:
8Basic editingCrossStudio has a bui
Page 77 and 78:
KeystrokeLeftRightHomeEndPageUpPage
Page 79 and 80:
—or—•From the Edit menu, clic
Page 81 and 82:
•Either click somewhere in the do
Page 83 and 84:
To cut whole lines from the current
Page 85 and 86:
•From the Edit menu, click Advanc
Page 87 and 88:
•Set the Indent Closing Brace pro
Page 89 and 90:
•Select Edit | Insert File menu i
Page 91 and 92:
•If the search will be carried ou
Page 93 and 94:
Advanced editor featuresCode Templa
Page 95 and 96:
•Select Edit > Advanced > Uncomme
Page 97 and 98:
9Memory map editorMemory map files
Page 99 and 100:
•Input Section Names. The optiona
Page 101 and 102:
10Package managementCrossWorks can
Page 103 and 104:
11Linking and Section placementExec
Page 105 and 106:
The startup code will need to copy
Page 107 and 108:
12CrossStudio WindowsThis section i
Page 109 and 110:
•Repeatedly type Ctrl+Shift+V to
Page 111 and 112:
•Enable, disable and delete exist
Page 113 and 114:
Editing a breakpointTo edit the pro
Page 115 and 116:
—or—•From the Breakpoints win
Page 117 and 118:
—or—•On the Debug tool bar, c
Page 119 and 120:
—or—•On the Debug Location to
Page 121 and 122:
Globals tool barButtonDescriptionDi
Page 123 and 124:
Locals tool barButtonDescriptionDis
Page 125 and 126:
Memory window updatesThe memory win
Page 127 and 128:
Showing the Registers windowTo disp
Page 129 and 130:
clicking on one of the entries in t
Page 131 and 132:
Watch tool barButtonDescriptionDisp
Page 133 and 134:
Expressions you can watchHelp windo
Page 135 and 136:
Output windowThe Output window cont
Page 137 and 138:
The Project Explorer tool barButton
Page 139 and 140:
Source navigator windowOne of the b
Page 141 and 142:
—or—•On the Source Navigator
Page 143 and 144:
variables, the range is the range o
Page 145 and 146:
Grouping symbols by source fileWhen
Page 147 and 148:
•In the Symbol Browser, right cli
Page 149 and 150:
—or—•In the Targets window, c
Page 151 and 152:
Controlling target connectionsReset
Page 153 and 154:
13Target interfacesA target interfa
Page 155 and 156:
•Parallel Port Address The base a
Page 157 and 158:
•Identify Target Specifies whethe
Page 159 and 160:
•Processor Stop Time The timeout
Page 161 and 162:
14ARM Target SupportWhen a target s
Page 163 and 164:
•fiq_handler - This is the defaul
Page 165 and 166:
There is a Heap Size linker project
Page 167 and 168:
Target script fileThe target interf
Page 169 and 170:
efore the debugger starts accessing
Page 171 and 172:
DescriptionTargetInterface.peekByte
Page 173 and 174:
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 and 226: 20SemaphoresA semaphore is a counte
Page 227 and 228: }}ctl_semaphore_signal(&s1);/* reso
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: 25Programmable interrupt handlingTh
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
Page 276 and 277: ldexpSynopsis#include double ldexp(
Page 278 and 279: IEC 60559 mathlibrary behaviorPorta
Page 280 and 281: If x = +Infinity and y < 0 and y N
Page 282 and 283: sinhfSynopsis#include float sinhf(f
Page 284 and 285: tanhfSynopsis#include float tanhf(f
Page 286 and 287: - Variable argumentsThe header file
Page 288 and 289: The behaviour of va_start and va_ar
Page 290 and 291: Some CrossWorks library variants do
Page 292 and 293:
produces ‘INF’ or ‘NAN’ ins
Page 294 and 295:
A directive that is a conversion sp
Page 296 and 297:
•‘[’. Matches a nonempty sequ
Page 298 and 299:
Portabilityputchar conforms to ISO/
Page 300 and 301:
DescriptionPortabilitysscanf reads
Page 302 and 303:
DescriptionNotesPortabilityvsprintf
Page 304 and 305:
Pseudo-random sequence generation f
Page 306 and 307:
DescriptionPortabilitycalloc alloca
Page 308 and 309:
Description ldiv_t stores the quoti
Page 310 and 311:
See Also srand (page 302) RAND_MAX
Page 312 and 313:
strtofSynopsisDescriptionPortabilit
Page 314 and 315:
strtollSynopsisDescription#include
Page 316 and 317:
If the subject sequence begins with
Page 318 and 319:
Descriptionultoa converts val to a
Page 320 and 321:
memchr returns a pointer to the loc
Page 322 and 323:
DescriptionPortabilitystrcmp compar
Page 324 and 325:
strncmp returns an integer greater
Page 326 and 327:
strtok then searches from there for
Page 329 and 330:
29CrossBuildThe command line progra
Page 331 and 332:
30CrossLoadCrossLoad is a command l
Page 333 and 334:
This command will produce a list of
Page 335 and 336:
31mkhdr - C/C++ header file generat
Page 337 and 338:
32mkpkg - package creatorTo create
Page 339 and 340:
33GCC Online Documentation
Page 341 and 342:
34BINUTILS Online Documentation
Page 343:
Part VIAppendicesAppendices
Page 346 and 347:
•access The permissable access ty
Page 348 and 349:
ProgramSection elements have the fo
Page 350 and 351:
The next entry is the projects elem
Page 352 and 353:
344 Chapter 35 File formats
Page 354 and 355:
Property Type Save NameExclude From
Page 356 and 357:
Property Type Save NameInclude Debu
Page 358 and 359:
Property Type Save NameSuppress War
Page 360 and 361:
Property Name Type Save NameARM Arc
Page 362 and 363:
Property Name Type Save NameARM Flo
Page 364 and 365:
Property Name Type Save NameGenerat
Page 366 and 367:
Property Name Type Save NameOptimiz
Page 368 and 369:
Property Type Save NameUndefine All
Page 370 and 371:
Property Type Save NameZeroed Secti
Page 372 and 373:
Property Type Save NameLoad Address
Page 374 and 375:
Library PropertiesLibrary OptionsTh
Page 376 and 377:
Printf/Scanf OptionsProperty Type S
Page 378 and 379:
Property Type Save NameScanf Intege
Page 380 and 381:
Property Type Save NameAdditional O
Page 382 and 383:
Property Type Save NameGenerate Map
Page 384 and 385:
Property Type Save NameMemory Map F
Page 386 and 387:
Property Type Save NameStack Size (
Page 388 and 389:
Property Type Save NamePackage Memb
Page 390 and 391:
Combining OptionsThese properties a
Page 392 and 393:
Target OptionsProperty Type Save Na
Page 394 and 395:
Property Type Save NameARM Debug In
Page 396 and 397:
Property Type Save NameDebug Handle
Page 398 and 399:
Property Type Save NameJTAG Data Bi
Page 400 and 401:
Property Type Save NameJTAG Instruc
Page 402 and 403:
Property Type Save NameLast Loader
Page 404 and 405:
Property Type Save NameLoader File
Page 406 and 407:
Simulator OptionsProperty Type Save
Page 408 and 409:
Keystrokes Menu DescriptionCtrl+Pag
Page 410 and 411:
Keystrokes Menu DescriptionCtrl+F E
Page 412 and 413:
Keystrokes Menu DescriptionEdit |Ad
Page 414 and 415:
Keystrokes Menu ActionF3BackspaceDe
Page 416:
408 Chapter 39 Glossary
show all

CrossWorks for ARM User Guide

Create successful ePaper yourself

Delete template?

Save as template?