uC/OS-II (Structure) - ê²½í¬ëíêµ

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Task Management (Cont’d) • Task / OSTaskCreate() or OSTaskCreateExt() INT8U OSTaskCreate (void (*task)(void *pd), void *pdata, OS_STK *ptos, INT8U prio) { #if OS_CRITICAL_METHOD == 3 OS_CPU_SR cpu_sr; #endif void *psp; INT8U err; #if OS_ARG_CHK_EN > 0 if (prio > OS_LOWEST_PRIO) { return (OS_PRIO_INVALID); } #endif OS_ENTER_CRITICAL(); if (OSTCBPrioTbl[prio] == (OS_TCB *)0) { OSTCBPrioTbl[prio] = (OS_TCB *)1; OS_EXIT_CRITICAL(); psp = (void *)OSTaskStkInit(task, pdata, ptos, 0); err = OS_TCBInit(prio, psp, (void *)0, 0, 0, (void *)0, 0); if (err == OS_NO_ERR) { OS_ENTER_CRITICAL(); OSTaskCtr++; OS_EXIT_CRITICAL(); if (OSRunning == TRUE) { OS_Sched(); } } else { OS_ENTER_CRITICAL(); OSTCBPrioTbl[prio] = (OS_TCB *)0; OS_EXIT_CRITICAL(); } return (err); } OS_EXIT_CRITICAL(); return (OS_PRIO_EXIST); } Embedded System Lab. II 41
Task Management (Cont’d) • Task Stack Task Stack , OS_STK . Stack ( ) () . static OS_STK MyTaskStack[stack_size]; OS_STK MyTaskStack[stack_size]; Static Stack OS_STK *pstk;pstk = (OS_STK *)malloc(stack_size); if (pstk != (OS_STK *)0) { /* Make sure malloc() has enough space */ Create the task; } Using malloc() to allocate stack space for a task Embedded System Lab. II 42
Page 1 and 2: MicroC/OS /OS-II Structure Embed
Page 3 and 4: Introduction Embedded System Lab. I
Page 5 and 6: Introduction (Cont’d) • MicroC/
Page 7 and 8: Kernel Structure Embedded System La
Page 9 and 10: Kernel Structure (Cont’d) OS_EN
Page 11 and 12: Kernel Structure (Cont’d) • Tas
Page 17 and 18: Kernel Structure (Cont’d) • Rea
Page 19 and 20: Kernel Structure (Cont’d) •
Page 23 and 24: Kernel Structure (Cont’d) Task
Page 25 and 26: Kernel Structure (Cont’d) • Sch
Page 27 and 28: Kernel Structure (Cont’d) • Ta
Page 29 and 30: Kernel Structure (Cont’d) • Ta
Page 31 and 32: Kernel Structure (Cont’d) • Mic
Page 33 and 34: Kernel Structure (Cont’d) • Clo
Page 39 and 40: Task Management Embedded System Lab
Page 41: Task Management (Cont’d) • Task
Page 45 and 46: Task Management (Cont’d) • Task
Page 47 and 48: Task Management (Cont’d) • Stac
Page 55 and 56: Time Management Embedded System Lab
Page 57 and 58: Time Management (Cont’d) • Task
Page 59 and 60: Time Management (Cont’d) • Task
Page 61 and 62: Time Management (Cont’d) • /
Page 63 and 64: Event Control Block • Event Contr
Page 65 and 66: Event Control Block (Cont’d) •
Page 71 and 72: Semaphore Management Embedded Syste
Page 73 and 74: Semaphore Management (Cont’d) •
Page 79 and 80: Mutual Exclusive Semaphore Embedded
Page 81 and 82: Event Flags Management Embedded Sys
Page 83 and 84: Event Flags Management (Cont’d)
Page 85 and 86: Event Flags Management (Cont’d)
Page 87 and 88: Message Mailbox Embedded System Lab
Page 89 and 90: Message Mailbox Management (Cont’
Page 91 and 92: Message Mailbox Management (Cont’
Page 93 and 94:
Message Mailbox Management (Cont’
Page 95 and 96:
Message Queue Mailbox Embedded Syst
Page 97 and 98:
Message Queue Management (Cont’d)
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Page 105 and 106:
Page 107 and 108:
Memory Management • Memory Manage
Page 109 and 110:
Memory Queue Management (Cont’d)
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Page 113 and 114:
Page 115 and 116:
Page 117 and 118:
MicroC/OS /OS-II Porting • Portin
Page 119 and 120:
MicroC/OS /OS-II Porting (Cont’d)
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