util_sleep.c

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/***************************************************************************/
#include "thunderboard/util.h"
#include "rtcdriver.h"
#include "em_emu.h"

/***************************************************************************/
/***************************************************************************/
/* Local variables */
static volatile bool    rtcComplete;
static RTCDRV_TimerID_t rtcId;      
/***************************************************************************/
static void rtcCb( RTCDRV_TimerID_t id, void *user );
void SysTick_Handler( void );


/***************************************************************************/
uint32_t UTIL_sleepInit( void )
{
   uint32_t stat;

   /* Allocate RTC timer and start driver */
   stat = RTCDRV_Init();
   if( stat != ECODE_EMDRV_RTCDRV_OK ){
      return stat;
   }

   stat = RTCDRV_AllocateTimer(&rtcId);

   return stat;
}

/***************************************************************************/
void UTIL_sleep( uint32_t ms )
{
   rtcComplete = false;
   RTCDRV_StartTimer( rtcId, rtcdrvTimerTypeOneshot, ms, rtcCb, 0 );

   while( !rtcComplete )
      EMU_EnterEM2(true);

   return;
}

/***************************************************************************/
uint32_t UTIL_waitForEvent( uint32_t timeout )
{
   uint32_t remaining;

   rtcComplete = false;
   RTCDRV_StartTimer( rtcId, rtcdrvTimerTypeOneshot, timeout, rtcCb, 0 );

   EMU_EnterEM2( true );

   if( rtcComplete ){
      remaining = 0;
   }
   else {
      RTCDRV_TimeRemaining( rtcId, &remaining );
   }

   return remaining;
}

/***************************************************************************/
static void rtcCb( RTCDRV_TimerID_t id, void *user )
{
   rtcComplete = true;
}

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