예제 #1
0
파일: osc.c 프로젝트: 0xBADCA7/lk
//*****************************************************************************
//
// Returns maximum startup time (in microseconds) of XOSC_HF
//
//*****************************************************************************
uint32_t
OSCHF_GetStartupTime( uint32_t timeUntilWakeupInMs )
{
   uint32_t deltaTimeSinceXoscOnInMs   ;
   int32_t  deltaTempSinceXoscOn       ;
   uint32_t newStartupTimeInUs         ;

   deltaTimeSinceXoscOnInMs = RTC_CV_TO_MS( AONRTCCurrentCompareValueGet() - oscHfGlobals.timeXoscOn_CV );
   deltaTempSinceXoscOn     = AONBatMonTemperatureGetDegC() - oscHfGlobals.tempXoscOff;

   if ( deltaTempSinceXoscOn < 0 ) {
      deltaTempSinceXoscOn = -deltaTempSinceXoscOn;
   }

   if (  (( timeUntilWakeupInMs + deltaTimeSinceXoscOnInMs )     > 3000 ) ||
         ( deltaTempSinceXoscOn                                  >    5 ) ||
         ( oscHfGlobals.timeXoscStable_CV < oscHfGlobals.timeXoscOn_CV  ) ||
         ( oscHfGlobals.previousStartupTimeInUs                  ==   0 )    )
   {
      newStartupTimeInUs = 2000;
      if (( HWREG( CCFG_BASE + CCFG_O_SIZE_AND_DIS_FLAGS ) & CCFG_SIZE_AND_DIS_FLAGS_DIS_XOSC_OVR_M ) == 0 ) {
         newStartupTimeInUs = (( HWREG( CCFG_BASE + CCFG_O_MODE_CONF_1 ) &
            CCFG_MODE_CONF_1_XOSC_MAX_START_M ) >>
            CCFG_MODE_CONF_1_XOSC_MAX_START_S ) * 125;
            // Note: CCFG startup time is "in units of 100us" adding 25% margin results in *125
      }
예제 #2
0
파일: main.c 프로젝트: coolt/bicycle_finish
// interrupts -----------------------------------------------------------
void GPIOIntHandler(void){

  uint32_t event_flags;
  static uint32_t time1 = 0,time2 = 0;

  powerEnablePeriph();
  powerEnableGPIOClockRunMode();
  /* Wait for domains to power on */
  while((PRCMPowerDomainStatus(PRCM_DOMAIN_PERIPH) != PRCM_DOMAIN_POWER_ON));

  time1 = time2;
  time2=AONRTCCurrentCompareValueGet();
  g_diff=time2-time1;

  /*Disable interrupts while clearing flags*/
  IntDisable(INT_EDGE_DETECT);
  /* Read interrupt flags */
  event_flags = (HWREG(GPIO_BASE + GPIO_O_EVFLAGS31_0) & GPIO_PIN_MASK);
  if(event_flags){//Is an event flag set? (should always be set)
    /* Clear the interrupt flags*/
    HWREG(GPIO_BASE + GPIO_O_EVFLAGS31_0) = event_flags;
    /*Wait until the flag is cleared, no new flag possible because interrupt disabled*/
    //while((HWREG(GPIO_BASE + GPIO_O_EVFLAGS31_0) & GPIO_PIN_MASK));  // CRASH
  }
  /*Enable after flags cleared*/
  IntEnable(INT_EDGE_DETECT);




  powerDisablePeriph();
  // Disable clock for GPIO in CPU run mode
  HWREGBITW(PRCM_BASE + PRCM_O_GPIOCLKGR, PRCM_GPIOCLKGR_CLK_EN_BITN) = 0;
  // Load clock settings
  HWREGBITW(PRCM_BASE + PRCM_O_CLKLOADCTL, PRCM_CLKLOADCTL_LOAD_BITN) = 1;

  //To avoid second interupt with register = 0 (its not fast enough!!)
  __asm(" nop");
  __asm(" nop");
  __asm(" nop");
  __asm(" nop");
  __asm(" nop");
  __asm(" nop");
}