CC2541怎样做到微秒延时？

只看该作者 · 2015-10-26 17:19

本帖最后由右岸于 2015-10-27 14:58 编辑

本人新手，刚玩CC2541，想实现一个1500微秒的延时，发现OSAL下有下面的定时函数，但是毫秒级的:

/*********************************************************************

 * @fn      osal_start_timerEx

 *

 * @brief

 *

 *   This function is called to start a timer to expire in n mSecs.

 *   When the timer expires, the calling task will get the specified event.

 *

 * @param   uint8 taskID - task id to set timer for

 * @param   uint16 event_id - event to be notified with

 * @param   uint32 timeout_value - in milliseconds.

 *

 * [url=home.php?mod=space&uid=266161]@return[/url]  SUCCESS, or NO_TIMER_AVAIL.

 */

uint8 osal_start_timerEx( uint8 taskID, uint16 event_id, uint32 timeout_value )

{

  halIntState_t intState;

  osalTimerRec_t *newTimer;



  HAL_ENTER_CRITICAL_SECTION( intState );  // Hold off interrupts.



  // Add timer

  newTimer = osalAddTimer( taskID, event_id, timeout_value );



  HAL_EXIT_CRITICAL_SECTION( intState );   // Re-enable interrupts.



  return ( (newTimer != NULL) ? SUCCESS : NO_TIMER_AVAIL );

}



/*********************************************************************