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uC/OS-II (Structure) - 경희대학교

uC/OS-II (Structure) - 경희대학교

uC/OS-II (Structure) - 경희대학교

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MicroC/<strong>OS</strong><br />

/<strong>OS</strong>-<strong>II</strong> Porting (Cont’d)<br />

• <strong>OS</strong>_ENTER_CRITICAL() <strong>OS</strong>_EXIT_CRITICAL()<br />

<strong>OS</strong>_CRITICAL_METHOD == 1<br />

‣ <strong>OS</strong>_ENTER_CRITICAL(): <br />

‣ <strong>OS</strong>_EXIT_CRITICA(): <br />

‣ : MicroC/<strong>OS</strong>-<strong>II</strong> <br />

.<br />

#define <strong>OS</strong>_ENTER_CRITICAL() disable_int() /* */<br />

#define <strong>OS</strong>_EXIT_CRITICAL() enable_int() /* */<br />

<strong>OS</strong>_CRITICAL_METHOD == 2<br />

‣ <strong>OS</strong>_ENTER_CRITICAL(): <br />

‣ <strong>OS</strong>_EXIT_CRITICAL(): <br />

#define <strong>OS</strong>_ENTER_CRITICAL() \<br />

asm(“ PUSH PSW”); \<br />

asm(“ DI”);<br />

#define <strong>OS</strong>_EXIT_CRITICAL() \<br />

asm(“POP PSW”);<br />

Embedded System Lab. <strong>II</strong> 121

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