uC/OS-II (Structure) - ê²½í¬ëíêµ

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Kernel Structure (Cont’d) • Task void OS_TaskStat (void *pdata) { #if OS_CRITICAL_METHOD == 3 OS_CPU_SR cpu_sr; #endif INT32U run; INT32U max; INT8S usage; pdata = pdata; while (OSStatRdy == FALSE){ OSTimeDly(2 * OS_TICKS_PER_SEC); } max = OSIdleCtrMax / 100L; } for (;;) { OS_ENTER_CRITICAL(); OSIdleCtrRun = OSIdleCtr; run = OSIdleCtr; OSIdleCtr = 0L; OS_EXIT_CRITICAL(); if (max > 0L) { usage = (INT8S)(100L - run / max); if (usage >= 0) { OSCPUUsage = usage; } else { OSCPUUsage = 0; } } else { OSCPUUsage = 0; max = OSIdleCtrMax / 100L; } OSTaskStatHook(); OSTimeDly(OS_TICKS_PER_SEC); } Embedded System Lab. II 29
Kernel Structure (Cont’d) • MicroC/OS-II Interrupt MicroC/OS-II Interrupt Service Routine (ISR) C Inline C ISR . Interrupt ‣ OSIntEnter(), OSIntExit(), OSIntCtxSW() YourISR: Save all CPU registers; Call OSIntEnter() or, increment OSIntNesting directly; if (OSIntNesting == 1) { OSTCBCur->OSTCBStkPtr = SP; } Clear interrupting device; Re-enable interrupts (optional) Execute user code to service ISR; Call OSIntExit(); Restore all CPU registers; Execute a return from interrupt instruction; Embedded System Lab. II 30
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: Kernel Structure (Cont’d) • Ta
Page 33 and 34: Kernel Structure (Cont’d) • Clo
Page 35 and 36: Kernel Structure (Cont’d) • Mic
Page 37 and 38: Kernel Structure (Cont’d) • Mic
Page 39 and 40: Task Management Embedded System Lab
Page 41 and 42: 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
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Event Flags Management Embedded Sys
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Event Flags Management (Cont’d)
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Event Flags Management (Cont’d)
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Message Mailbox Embedded System Lab
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Message Mailbox Management (Cont’
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Message Queue Mailbox Embedded Syst
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Message Queue Management (Cont’d)
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Memory Management • Memory Manage
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Memory Queue Management (Cont’d)
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MicroC/OS /OS-II Porting • Portin
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MicroC/OS /OS-II Porting (Cont’d)
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