RtStatus_t hw_power_InitPowerSupplies(void)
{
RtStatus_t Status;
//----------------------------------------------------------------------
// Make sure the power supplies are configured for their power sources.
// This sets the LINREG_OFFSET field correctly for each power supply.
//---------------------------------------------------------------------
if(hw_power_Get5vPresentFlag())
{
if((Status = hw_power_SetVdddPowerSource(HW_POWER_LINREG_DCDC_READY))
!= SUCCESS)
return Status;
if((Status = hw_power_SetVddaPowerSource(HW_POWER_LINREG_DCDC_READY))
!= SUCCESS)
return Status;
if((Status = hw_power_SetVddioPowerSource(HW_POWER_LINREG_DCDC_READY))
!= SUCCESS)
return Status;
}
else
{
if((Status = hw_power_SetVdddPowerSource(HW_POWER_DCDC_LINREG_READY))
!= SUCCESS)
return Status;
if((Status = hw_power_SetVddaPowerSource(HW_POWER_DCDC_LINREG_READY))
!= SUCCESS)
return Status;
if((Status = hw_power_SetVddioPowerSource(HW_POWER_DCDC_LINREG_READY))
!= SUCCESS)
return Status;
// Need to make sure the DCDC does not run with a bad or broken battery.
if( hw_power_GetBatteryVoltage() <= 2800 )
{
hw_power_PowerDown();
}
hw_power_ClearBatteryBrownoutInterrupt();
hw_power_EnableBatteryBrownoutInterrupt(true);
hw_power_EnableDcdc(true);
}
//--------------------------------------------------------------------------
// Done.
//--------------------------------------------------------------------------
return SUCCESS;
}
bool hw_power_FiqHandler(void)
{
uint32_t u32FIQBits;
uint32_t u32Start;
//--------------------------------------------------------------------------
// VBUSDROOP is time critical so it must be checked first. The first three
// registers bitfield clears should occur ASAP.
//--------------------------------------------------------------------------
if( HW_POWER_CTRL.B.VDD5V_DROOP_IRQ &&
HW_POWER_CTRL.B.ENIRQ_VDD5V_DROOP )
{
// Stop the 4P2. This forces the DCDC to immediatlely use the battery
// power.
BF_CLR( POWER_DCDC4P2, ENABLE_DCDC );
BF_CLR( POWER_DCDC4P2, ENABLE_4P2 );
BF_CLR( POWER_CHARGE, ENABLE_LOAD );
// Disable the ICOLL VDD5V droop interrupt
hw_power_EnableVdd5vDroopInterrupt( false );
hw_icoll_EnableVector((ICOLL_IRQ_enums_t)(VECTOR_IRQ_VDD5V_DROOP),
false );
// Clear status for next interrupt.
hw_power_ClearVdd5vDroopInterrupt();
// Trigger a 5V removal interrupt since VBUSDROOP is the first indicator
// 5V is lost. This will overcome any VBUSVALID hysterisis issues.
hw_icoll_SoftTrigger( VECTOR_IRQ_VDD5V, true );
return false;
}
//--------------------------------------------------------------------------
// The HW_POWER_CTRL register contains all the brownout interrupt bits. We
// need to read this register.
//--------------------------------------------------------------------------
u32FIQBits = HW_POWER_CTRL_RD();
//--------------------------------------------------------------------------
// Find out if either VDDD, VDDA, or VDDIO have drooped.
//--------------------------------------------------------------------------
if (u32FIQBits &
(BM_POWER_CTRL_VDDD_BO_IRQ | BM_POWER_CTRL_VDDIO_BO_IRQ |
BM_POWER_CTRL_VDDA_BO_IRQ))
{
uint32_t u32BoStsBits;
//----------------------------------------------------------------------
// Loop for specified time to debounce the brownout status bits.
//----------------------------------------------------------------------
#ifdef DEBUG_FIQ
//----------------------------------------------------------------------
// This version saves important data to a global variables to help
// debug any brownout issues. The debounce time can also be changed.
//----------------------------------------------------------------------
u32Start = HW_DIGCTL_MICROSECONDS_RD();
while(HW_DIGCTL_MICROSECONDS_RD()<u32Start+DEBUG_DebounceMicroseconds);
u32BoStsBits = HW_POWER_STS_RD();
DEBUG_StatusRegister = u32BoStsBits;
DEBUG_BrownoutStatusBits = (u32BoStsBits &
(BM_POWER_STS_VDDD_BO | BM_POWER_STS_VDDA_BO | BM_POWER_STS_VDDIO_BO));
#else
//----------------------------------------------------------------------
// This version should be used for production code.
//----------------------------------------------------------------------
u32Start = HW_DIGCTL_MICROSECONDS_RD();
while(HW_DIGCTL_MICROSECONDS_RD() < u32Start+FIQ_DEBOUNCE_MICROSECONDS)
{
u32BoStsBits = HW_POWER_STS_RD();
if(
( !(u32BoStsBits & BM_POWER_STS_VDDD_BO) ) ==
( !(u32BoStsBits & BM_POWER_STS_VDDA_BO) ) ==
( !(u32BoStsBits & BM_POWER_STS_VDDIO_BO) )
)
{
//--------------------------------------------------------------
// This was a false brownout. We need to clear the brownout IRQ
// bits and return.
//--------------------------------------------------------------
BF_CLR(POWER_CTRL,VDDD_BO_IRQ);
BF_CLR(POWER_CTRL,VDDA_BO_IRQ);
BF_CLR(POWER_CTRL,VDDIO_BO_IRQ);
//--------------------------------------------------------------
// We need to return FALSE to let the PMI FIQ know this was a
// false power supply brownout. Otherwise, the PMI FIQ will
// assume since we had a brownout and it wasn't a supply, it
// must have been the battery.
//--------------------------------------------------------------
return false;
}
}
#endif
#ifdef DEBUG_FIQ
//----------------------------------------------------------------------
// The following function call will set a debug point.
// This is the last place to stop before the brownout would
// shut down power. A while loop is used instead of SystemHalt()
// because SystemHalt needs to be paged in.
//----------------------------------------------------------------------
while(DEBUG_BrownoutStatusBits);
#endif
//----------------------------------------------------------------------
// One of the rail's experienced a brownout. We need to power down
// the device. Good bye.
//----------------------------------------------------------------------
hw_power_PowerDown();
return true;
}
//--------------------------------------------------------------------------
// The power rails didn't brownout. Check the 4p2 rail.
//--------------------------------------------------------------------------
else if (u32FIQBits & BM_POWER_CTRL_DCDC4P2_BO_IRQ &&
HW_POWER_CTRL.B.ENIRQ_DCDC4P2_BO)
{
#ifdef DEBUG_FIQ
DEBUG_StatusRegister = ( HW_POWER_STS_RD() |
BM_POWER_CTRL_DCDC4P2_BO_IRQ );
while( DEBUG_StatusRegister );
#endif
// We had a brownout on the 4p2 rail. Power down the chip.
hw_power_PowerDown();
return true;
}
//--------------------------------------------------------------------------
// The only brownout left is the battery. Check it.
//--------------------------------------------------------------------------
else if (u32FIQBits & BM_POWER_CTRL_BATT_BO_IRQ)
{
return true;
}
//--------------------------------------------------------------------------
// We should not reach this statement. If we do, there is a brownout
// we are not handling. This is here to make the compiler happy.
//--------------------------------------------------------------------------
else
{
return false;
}
}