ucosman.ps

UCSO在三星S3C44B0X CPU上的移植。ｅｊｏｙ ｉｔ

2 F
(SEE ALSO) 108 410.33 T
3 11 Q
(OSDisableInt\050\051.) 135 389.67 T
FMENDPAGE
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612 792 0 FMBEGINPAGE
0 10 Q
0 X
0 K
(OSSchedLock\050\051) 108 749.33 T
1 F
(m) 282.5 749.33 T
0 F
(C/OS System Calls) 288.26 749.33 T
(OSSchedLock\050\051) 475.57 749.33 T
108 54 540 54 2 L
1 H
2 Z
N
(VLSI T) 108 41.28 T
(echnology Inc.) 138.13 41.28 T
(July 1, 1993) 299.42 41.28 T
(5) 535 41.28 T
108 738 540 738 2 L
N
2 18 Q
(OSSchedLock) 108 708 T
0 14 Q
(Prevent task pre-emption.) 135 674.67 T
3 11 Q
(#include \322ucos.h\323) 135 646.67 T
(void OSSchedLock\050void\051) 135 616.67 T
2 12 Q
(DESCRIPTION) 108 586.33 T
3 11 Q
(OSSchedLock\050\051) 135 565 T
0 12 Q
( avoids the) 220.8 565 T
1 F
(m) 275.8 565 T
0 F
(C/OS to schedule a dif) 282.71 565 T
(ferent task even if a higher pri-) 391.15 565 T
(ority one is ready to run, until its counterpart) 135 551 T
3 11 Q
(OSSchedUnlock\050\051) 352.98 551 T
0 12 Q
( is called.) 451.98 551 T
(Interrupts will still be accepted and served, unless dif) 135 531 T
(ferently speci\336ed with a previ-) 390.41 531 T
(ous call to) 135 517 T
3 11 Q
(OSDisableInt\050\051) 187.33 517 T
0 12 Q
(.) 279.73 517 T
2 F
(NOTES) 108 488.33 T
0 F
(After calling) 135 467 T
3 11 Q
(OSSchedLock\050\051) 198.98 467 T
0 12 Q
( the application must not invoke any) 284.78 467 T
1 F
(m) 462.44 467 T
0 F
(C/OS system) 469.36 467 T
(call that can suspend the current task, or the system will result in a deadlock. The) 135 453 T
(application cannot call) 135 439 T
3 11 Q
(OSTimeDly\050\051) 246.65 439 T
0 12 Q
(,) 319.25 439 T
3 11 Q
(OSSemPend\050\051) 325.25 439 T
0 12 Q
(,) 397.85 439 T
3 11 Q
(OSMboxPend\050\051) 403.85 439 T
0 12 Q
( or) 483.05 439 T
3 11 Q
(OSQPend\050\051) 135 425 T
0 12 Q
( while the scheduler is locked up with a call to) 194.4 425 T
3 11 Q
(OSSchedLock\050\051) 420.04 425 T
0 12 Q
(.) 505.84 425 T
2 F
(SEE ALSO) 108 396.33 T
3 11 Q
(OSSchedUnlock\050\051.) 135 375.67 T
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612 792 0 FMBEGINPAGE
0 10 Q
0 X
0 K
(OSSchedUnlock\050\051) 108 749.33 T
1 F
(m) 282.5 749.33 T
0 F
(C/OS System Calls) 288.26 749.33 T
(OSSchedUnlock\050\051) 466.68 749.33 T
108 54 540 54 2 L
1 H
2 Z
N
(VLSI T) 108 41.28 T
(echnology Inc.) 138.13 41.28 T
(July 1, 1993) 299.42 41.28 T
(6) 535 41.28 T
108 738 540 738 2 L
N
2 18 Q
(OSSchedUnlock) 108 708 T
0 14 Q
(Enable task pre-emption.) 135 674.67 T
3 11 Q
(#include \322ucos.h\323) 135 646.67 T
(void OSSchedUnlock\050void\051) 135 616.67 T
2 12 Q
(DESCRIPTION) 108 586.33 T
0 F
(OSSchedUnlock re-enables the) 135 565 T
1 F
(m) 287.96 565 T
0 F
(C/OS scheduler if an equal number of) 294.88 565 T
3 11 Q
-0.57 (OSSchedLock\050\051) 135 551 P
0 12 Q
-0.26 ( calls have been made. That is,) 220.8 551 P
3 11 Q
-0.57 (OSSchedUnlock\050\051) 369.29 551 P
0 12 Q
-0.26 ( is used in pair) 468.29 551 P
(with) 135 537 T
3 11 Q
(OSSchedLock\050\051) 159.34 537 T
0 12 Q
( calls that are nested. Up to 254 levels of nesting calls to) 245.14 537 T
3 11 Q
(OSSchedLock\050\051) 135 523 T
0 12 Q
( are allowed.) 220.8 523 T
2 F
(NOTES) 108 494.33 T
0 F
(By default, after) 135 473 T
3 11 Q
(OS-Start\050\051) 216.31 473 T
0 12 Q
(, the scheduler is enabled.) 282.31 473 T
2 F
(SEE ALSO) 108 444.33 T
3 11 Q
(OSSchedLock\050\051.) 135 423.67 T
FMENDPAGE
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612 792 0 FMBEGINPAGE
0 10 Q
0 X
0 K
(OST) 108 749.33 T
(askCreate\050\051) 126.19 749.33 T
1 F
(m) 282.5 749.33 T
0 F
(C/OS System Calls) 288.26 749.33 T
(OST) 475.72 749.33 T
(askCreate\050\051) 493.91 749.33 T
108 54 540 54 2 L
1 H
2 Z
N
(VLSI T) 108 41.28 T
(echnology Inc.) 138.13 41.28 T
(July 1, 1993) 299.42 41.28 T
(7) 535 41.28 T
108 738 540 738 2 L
N
2 18 Q
(OST) 108 708 T
(askCr) 142.36 708 T
(eate) 189.04 708 T
0 14 Q
(Create a new task.) 135 674.67 T
3 11 Q
(#include \322ucos.h\323) 135 646.67 T
(typedef void \050*PTV\051\050void *\051;) 135 616.67 T
-0.52 (int OSTaskCreate\050PTV task, void *pdata, void *ptsk, uint prio\051) 135 601.67 P
2 12 Q
(DESCRIPTION) 108 571.33 T
0 F
(Create a) 135 550 T
1 F
(m) 177.65 550 T
0 F
(C/OS managed task. task is a pointer to the task\325) 184.56 550 T
(s code implemented as a) 417.22 550 T
-0.4 (function returning void and taking a pointer to void as ar) 135 536 P
-0.4 (gument. pdata is a pointer to) 402.75 536 P
(a data area used to pass parameters to the task when it is started. ptsk is a pointer to) 135 522 T
(the task\325) 135 508 T
(s bottom of stack. The ARM standard stack in C is a decreasing stack. The) 175.33 508 T
-0.2 (stack is used to store local variables and CPU registers during interrupts. The size of) 135 494 P
(the stack is de\336ned by the task requirements and the anticipated interrupt nesting. p) 135 480 T
(is the task priority) 135 466 T
(. A unique priority must be assigned to each task and the lower) 221.22 466 T
(number the higher the priority) 135 452 T
(.) 278.87 452 T
2 F
(RETURN V) 108 423.33 T
(ALUES) 168.78 423.33 T
0 F
(On success, OS_NO_ERR is returned. If the priority already exists, OS_PRIO_EX-) 135 400 T
(IST error is returned.) 135 386 T
2 F
(NOTES) 108 357.33 T
0 F
(T) 135 336 T
(asks can be created either prior to the start of multitasking or by a running task. A) 141.49 336 T
(task cannot be created by an interrupt service routine.) 135 322 T
2 F
(SEE ALSO) 108 293.33 T
3 11 Q
(OSTaskDel\050\051, OSTaskChangePrio\050\051.) 135 272.67 T
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612 792 0 FMBEGINPAGE
0 10 Q
0 X
0 K
(OST) 108 749.33 T
(askDel\050\051) 126.19 749.33 T
1 F
(m) 282.5 749.33 T
0 F
(C/OS System Calls) 288.26 749.33 T
(OST) 487.38 749.33 T
(askDel\050\051) 505.57 749.33 T
108 54 540 54 2 L
1 H
2 Z
N
(VLSI T) 108 41.28 T
(echnology Inc.) 138.13 41.28 T
(July 1, 1993) 299.42 41.28 T
(8) 535 41.28 T
108 738 540 738 2 L
N
2 18 Q
(OST) 108 708 T
(askDel) 142.36 708 T
0 14 Q
(Delete a task.) 135 674.67 T
3 11 Q
(#include \322ucos.h\323) 135 646.67 T
(int OSTaskDel\050uint prio\051) 135 616.67 T
2 12 Q
(DESCRIPTION) 108 586.33 T
0 F
-0.09 (Delete a task by specifying the priority number of the task to delete in prio. The idle) 135 565 P
(task cannot be deleted.) 135 551 T
2 F
(RETURN V) 108 522.33 T
(ALUES) 168.78 522.33 T
0 F
(On success, OS_NO_ERR is returned. If the task to delete does not exist,) 135 499 T
(OS_T) 135 485 T
(ASK_DEL_ERR is returned. If the task speci\336ed is the idle task,) 162.71 485 T
(OS_T) 135 471 T
(ASK_DEL_IDLE is returned.) 162.71 471 T
2 F
(NOTES) 108 442.33 T
0 F
(An interrupt service routine cannot delete a task.) 135 421 T
2 F
(SEE ALSO) 108 392.33 T
3 11 Q
(OSTaskCreate\050\051.) 135 371.67 T
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612 792 0 FMBEGINPAGE
0 10 Q
0 X
0 K
(OST) 108 749.33 T
(askChangePrio\050\051) 126.19 749.33 T
1 F
(m) 282.5 749.33 T
0 F
(C/OS System Calls) 288.26 749.33 T
(OST) 454.6 749.33 T
(askChangePrio\050\051) 472.79 749.33 T
108 54 540 54 2 L
1 H
2 Z
N
(VLSI T) 108 41.28 T
(echnology Inc.) 138.13 41.28 T
(July 1, 1993) 299.42 41.28 T
(9) 535 41.28 T
108 738 540 738 2 L
N
2 18 Q
(OST) 108 708 T
(askChangePrio) 142.36 708 T
0 14 Q
(Change a task\325) 135 674.67 T
(s priority) 217.43 674.67 T
(.) 267.47 674.67 T
3 11 Q
(#include \322ucos.h\323) 135 646.67 T
(int OSTaskChangePrio\050uint oldp, uint newp\051) 135 616.67 T
2 12 Q
(DESCRIPTION) 108 586.33 T
0 F
(Change priority to the task having priority oldp into newp.) 135 565 T
2 F
(RETURN V) 108 536.33 T
(ALUES) 168.78 536.33 T
0 F
(On success, OS_NO_ERR is returned and the task\325) 135 513 T
(s priority was changed. OS_PRI-) 380.3 513 T
(O_EXISTS is returned if newp already exists. OS_PRIO_ERR is returned if an) 135 499 T
(attempt to change priority to a non existing task is done.) 135 485 T
2 F
(NOTES) 108 456.33 T
0 F
(The desired new priority must not have been already assigned. OST) 135 435 T
(askChangePrio) 459.77 435 T
(disables interrupts for the longest period of time among the) 135 421 T
1 F
(m) 422.3 421 T
0 F
(C/OS routines.) 429.22 421 T
2 F
(SEE ALSO) 108 392.33 T
3 11 Q
(OSTaskCreate\050\051.) 135 371.67 T
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612 792 0 FMBEGINPAGE
0 10 Q
0 X
0 K
(OST) 108 749.33 T
(imeDly\050\051) 126.54 749.33 T
1 F
(m) 282.5 749.33 T
0 F
(C/OS System Calls) 288.26 749.33 T
(OST) 484.8 749.33 T
(imeDly\050\051) 503.34 749.33 T
108 54 540 54 2 L
1 H
2 Z
N
(VLSI T) 108 41.28 T
(echnology Inc.) 138.13 41.28 T
(July 1, 1993) 299.42 41.28 T
(10) 530 41.28 T
108 738 540 738 2 L
N
2 18 Q
(OST) 108 708 T
(imeDly) 143.69 708 T
0 14 Q
(Delay a task for a number of system ticks.) 135 674.67 T
3 11 Q
(#include \322ucos.h\323) 135 646.67 T
(void OSTimeDly\050uint ticks\051) 135 616.67 T
2 12 Q
(DESCRIPTION) 108 586.33 T
0 F
(Allows a task to delay itself for a ticks number of clock ticks.) 135 565 T
2 F
(NOTES) 108 536.33 T
0 F
(Rescheduling always occurs when the number of ticks is greater than zero.) 135 515 T
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612 792 0 FMBEGINPAGE
0 10 Q
0 X
0 K
(OST) 108 749.33 T
(imeSet\050\051) 126.54 749.33 T
1 F
(m) 282.5 749.33 T
0 F
(C/OS System Calls) 288.26 749.33 T
(OST) 487.02 749.33 T
(imeSet\050\051) 505.56 749.33 T
108 54 540 54 2 L
1 H
2 Z
N
(VLSI T) 108 41.28 T
(echnology Inc.) 138.13 41.28 T
(July 1, 1993) 299.42 41.28 T
(1) 530.37 41.28 T
(1) 535 41.28 T
108 738 540 738 2 L
N
2 18 Q
(OST) 108 708 T
(imeSet) 143.69 708 T
0 14 Q
(Set system time.) 135 674.67 T
3 11 Q
(#include \322ucos.h\323) 135 646.67 T
(void OSTimeSet\050uint ticks\051) 135 616.67 T
2 12 Q
(DESCRIPTION) 108 586.33 T
0 F
(The system clock is a 32 bit counter that counts the number of clock ticks since) 135 565 T
(power up. This function sets the value of the system clock to an arbitrary value.) 135 551 T
2 F
(NOTES) 108 522.33 T
0 F
(On the PID board the timer tick occurs 100 times per second.) 135 501 T
2 F
(SEE ALSO) 108 472.33 T
3 11 Q
(OSTimeGet\050\051.) 135 451.67 T
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%%Page: "12" 12
612 792 0 FMBEGINPAGE
0 10 Q
0 X
0 K
(OST) 108 749.33 T
(imeGet\050\051) 126.54 749.33 T
1 F
(m) 282.5 749.33 T
0 F
(C/OS System Calls) 288.26 749.33 T
(OST) 485.36 749.33 T
(imeGet\050\051) 503.9 749.33 T
108 54 540 54 2 L
1 H
2 Z
N
(VLSI T) 108 41.28 T
(echnology Inc.) 138.13 41.28 T
(July 1, 1993) 299.42 41.28 T
(12) 530 41.28 T
108 738 540 738 2 L
N
2 18 Q
(OST) 108 708 T
(imeGet) 143.69 708 T
0 14 Q
(Get current system time.) 135 674.67 T
3 11 Q
(#include \322ucos.h\323) 135 646.67 T
(uint OSTimeGet\050void\051) 135 616.67 T
2 12 Q
(DESCRIPTION) 108 586.33 T
0 F
(Obtains the current value of the system clock.) 135 565 T
2 F
(NOTES) 108 536.33 T
(SEE ALSO) 108 506.33 T
3 11 Q
(OSTimeSet\050\051.) 135 485.67 T
FMENDPAGE
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612 792 0 FMBEGINPAGE
0 10 Q
0 X
0 K
(OSSemCreate\050\051) 108 749.33 T
1 F
(m) 282.5 749.33 T
0 F
(C/OS System Calls) 288.26 749.33 T
(OSSemCreate\050\051) 476.68 749.33 T
108 54 540 54 2 L
1 H
2 Z
N
(VLSI T) 108 41.28 T
(echnology Inc.) 138.13 41.28 T
(July 1, 1993) 299.42 41.28 T
(13) 530 41.28 T
108 738 540 738 2 L
N
2 18 Q
(OSSemCr) 108 708 T
(eate) 185.67 708 T
0 14 Q
(Create a semaphore.) 135 674.67 T
3 11 Q
(#include \322ucos.h\323) 135 646.67 T
(OS_EVENT *OSSemCreate\050int value\051) 135 616.67 T
2 12 Q
(DESCRIPTION) 108 586.33 T
0 F
(Creates and initializes with the parameter value a semaphore.) 135 565 T
2 F
(RETURN V) 108 536.33 T
(ALUES) 168.78 536.33 T
0 F
-0.02 (A pointer to the event control block allocated for the semaphore. If no event control) 135 513 P
(block is available, a NULL pointer is returned.) 135 499 T
2 F
(NOTES) 108 470.33 T
0 F
(Semaphores must be created before used. This function cannot be called from an) 135 449 T
(interrupt service routine.) 135 435 T
2 F
(SEE ALSO) 108 406.33 T
3 11 Q
(OSSemPost\050\051, OSSemPend\050\051.) 135 385.67 T
FMENDPAGE
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612 792 0 FMBEGINPAGE
0 10 Q
0 X
0 K
(OSSemPend\050\051) 108 749.33 T
1 F
(m) 282.5 749.33 T
0 F
(C/OS System Calls) 288.26 749.33 T
(OSSemPend\050\051) 482.78 749.33 T
108 54 540 54 2 L
1 H
2 Z
N
(VLSI T) 108 41.28 T
(echnology Inc.) 138.13 41.28 T
(July 1, 1993) 299.42 41.28 T
(14) 530 41.28 T
108 738 540 738 2 L
N
2 18 Q
(OSSemPend) 108 708 T
0 14 Q
(W) 135 674.67 T
(ait on semaphore.) 147.1 674.67 T
3 11 Q
(#include \322ucos.h\323) 135 646.67 T
(void OSSemPend\050OS_EVENT *pevent, uint timeout, uint *err\051) 135 616.67 T
2 12 Q
(DESCRIPTION) 108 586.33 T
0 F
(Used to suspend and synchronize a task. If the value of the semaphore in pevent is) 135 565 T
-0.27 (greater than 0, this function decrements its value and returns to its caller) 135 551 P
-0.27 (. If the value) 477.42 551 P
(of the semaphore is less or equal to 0, the function decrements the semaphore value) 135 537 T
-0.17 (and suspend the calling task putting it in the waiting list for the semaphore. The task) 135 523 P
(will be suspended until the semaphore is released by the task owning it by calling) 135 509 T
3 11 Q
(OSSemPost\050\051) 135 495 T
0 12 Q
(. An optional timeout is speci\336ed when pending on a semaphore. A) 207.6 495 T
(value of 0 in the timeout indicates that the task will wait for ever for the semaphore.) 135 481 T
2 F
(RETURN V) 108 452.33 T
(ALUES) 168.78 452.33 T
0 F
-0.44 (The variable err is a pointer to a variable used to hold an error code. If the semaphore) 135 429 P
(is available, OS_NO_ERR is returned. If a timeout occurred, OS_TIMEOUT is) 135 415 T
(returned.) 135 401 T
2 F
(NOTES) 108 372.33 T
0 F
(This function cannot be called from an interrupt service routine.) 135 351 T
2 F
(SEE ALSO) 108 322.33 T
3 11 Q
(OSSemCreate\050\051, OSSemPost\050\051.) 135 301.67 T
FMENDPAGE
%%EndPage: "14" 15
%%Page: "15" 15
612 792 0 FMBEGINPAGE
0 10 Q
0 X
0 K
(OSSemPost\050\051) 108 749.33 T
1 F
(m) 282.5 749.33 T
0 F
(C/OS System Calls) 288.26 749.33 T
(OSSemPost\050\051) 485.55 749.33 T
108 54 540 54 2 L
1 H
2 Z
N
(VLSI T) 108 41.28 T
(echnology Inc.) 138.13 41.28 T
(July 1, 1993) 299.42 41.28 T
(15) 530 41.28 T
108 738 540 738 2 L
N
2 18 Q
(OSSemPost) 108 708 T
0 14 Q
(Signal semaphore.) 135 674.67 T
3 11 Q
(#include \322ucos.h\323) 135 646.67 T
(uint OSSemPost\050OS_EVENT *pevent\051) 135 616.67 T
2 12 Q
(DESCRIPTION) 108 586.33 T
0 F
(Signal the semaphore pointed by pevent. If the semaphore value is greater than or) 135 565 T
(equal to 0, the semaphore is incremented and the function returns to its caller) 135 551 T
(. If the) 504.28 551 T
-0.43 (semaphore value is negative, then the highest priority task waiting for the semaphore) 135 537 P
(is made ready to run. The current task is also pre-empted at the end of the function.) 135 523 T
2 F
(RETURN V) 108 494.33 T
(ALUES) 168.78 494.33 T
0 F
-0.5 (The function returns OS_NO_ERR if no error occured. OS_SEM_OVF is returned if) 135 471 P
(the semaphore over\337owed.) 135 457 T
2 F
(NOTES) 108 428.33 T
(SEE ALSO) 108 398.33 T
3 11 Q
(OSSemCreate\050\051, OSSemPend\050\051.) 135 377.67 T
FMENDPAGE
%%EndPage: "15" 16
%%Page: "16" 16
612 792 0 FMBEGINPAGE
0 10 Q
0 X
0 K
(OSMboxCreate\050\051) 108 749.33 T
1 F
(m) 282.5 749.33 T
0 F
(C/OS System Calls) 288.26 749.33 T
(OSMboxCreate\050\051) 470.57 749.33 T
108 54 540 54 2 L
1 H
2 Z
N
(VLSI T) 108 41.28 T
(echnology Inc.) 138.13 41.28 T
(July 1, 1993) 299.42 41.28 T
(16) 530 41.28 T
108 738 540 738 2 L
N
2 18 Q
(OSMboxCr) 108 708 T
(eate) 197.68 708 T
0 14 Q
(Create a mailbox.) 135 674.67 T
3 11 Q
(#include \322ucos.h\323) 135 646.67 T
(OS_EVENT* OSMboxCreate\050void *msg\051) 135 616.67 T
2 12 Q
(DESCRIPTION) 108 586.33 T
(NOTES) 108 556.33 T
(SEE ALSO) 108 526.33 T
3 11 Q
(OSMboxPend\050\051, OSMboxPost\050\051.) 135 505.67 T
FMENDPAGE
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612 792 0 FMBEGINPAGE