#ifndef INCLUDED_OS_LOOPDELAY_H
#define INCLUDED_OS_LOOPDELAY_H

#ifndef INCLUDED_OS_TYPES_H
#include <os_types.h>
#endif /*INCLUDED_OS_TYPES_H*/

#define OS_LOOP_DELAY_US(n) (n * SystemCoreClock/3000000)
#define OS_LOOP_DELAY_MS(n) (n * SystemCoreClock/3000)
#define OS_LOOP_DELAY_S(n)  (n * SystemCoreClock/3)

/*

    72Mhz时钟时，当ulCount为1时，函数耗时3个时钟，延时=3*1/72us=1/24us

    SystemCoreClock=72000000

    us级延时,延时n微秒
    LoopDelay(n*(SystemCoreClock/3000000));

    ms级延时,延时n毫秒
    LoopDelay(n*(SystemCoreClock/3000));

    m级延时,延时n秒
    LoopDelay(n*(SystemCoreClock/3));
*/

void os_loop_delay(unsigned long ulCount);

#define OS_LoopDelayUS(n)   os_loop_delay(OS_LOOP_DELAY_US(n))
#define OS_LoopDelayMS(n)   os_loop_delay(OS_LOOP_DELAY_MS(n))
#define OS_LoopDelayS(n)    os_loop_delay(OS_LOOP_DELAY_S(n))

#endif /*INCLUDED_OS_LOOPDELAY_H*/