35 lines
920 B
C
35 lines
920 B
C
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#ifndef INCLUDED_OS_LOOPDELAY_H
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#define INCLUDED_OS_LOOPDELAY_H
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#ifndef INCLUDED_OS_TYPES_H
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#include <os_types.h>
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#endif /*INCLUDED_OS_TYPES_H*/
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#define OS_LOOP_DELAY_US(n) (n * SystemCoreClock/3000000)
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#define OS_LOOP_DELAY_MS(n) (n * SystemCoreClock/3000)
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#define OS_LOOP_DELAY_S(n) (n * SystemCoreClock/3)
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/*
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72Mhz时钟时，当ulCount为1时，函数耗时3个时钟，延时=3*1/72us=1/24us
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SystemCoreClock=72000000
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us级延时,延时n微秒
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LoopDelay(n*(SystemCoreClock/3000000));
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ms级延时,延时n毫秒
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LoopDelay(n*(SystemCoreClock/3000));
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m级延时,延时n秒
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LoopDelay(n*(SystemCoreClock/3));
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*/
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void os_loop_delay(unsigned long ulCount);
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#define OS_LoopDelayUS(n) os_loop_delay(OS_LOOP_DELAY_US(n))
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#define OS_LoopDelayMS(n) os_loop_delay(OS_LOOP_DELAY_MS(n))
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#define OS_LoopDelayS(n) os_loop_delay(OS_LOOP_DELAY_S(n))
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#endif /*INCLUDED_OS_LOOPDELAY_H*/
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