////////////////////////////////////////////////////////////////////////////////
//! See hw_power.h for details.
////////////////////////////////////////////////////////////////////////////////
void hw_power_SetBatteryBrownoutVoltage( uint16_t BoVolt )
{
uint16_t BoRegCode;
uint16_t MaxBoRegCode;
BoRegCode = hw_power_ConvertBattBoToSetting( BoVolt);
// Verify the value is valid and set it. Note that an invalid value
// will not be set to the register.
MaxBoRegCode = BATT_BRWNOUT_MAX_REG_CODE_378x;
if ( BoRegCode <= MaxBoRegCode )
{
hw_power_SetBatteryBrownoutCode( BoRegCode );
}
}
////////////////////////////////////////////////////////////////////////////////
//! \brief Transfers the power source from 5V to the battery.
//!
//! \fntype Function
//!
//! This function will handle all the power rail transitions necesarry to power
//! the chip from the battery when it was previously powered from the 5V power
//! source.
//!
////////////////////////////////////////////////////////////////////////////////
void ddi_power_Execute5VoltsToBatteryHandoff(void)
{
if(ddi_power_Is4p2Enabled())
{
//----------------------------------------------------------------------
// Stop the 4p2 rail from powering the DCDC
//----------------------------------------------------------------------
ddi_power_Stop4p2();
//--------------------------------------------------------------------------
// Disable hardware power down when 5V is inserted or removed
//--------------------------------------------------------------------------
hw_power_Enable5vBrownoutPowerdown( false );
//--------------------------------------------------------------------------
// Re-enable the battery brownout interrupt in case it was disabled.
//--------------------------------------------------------------------------
hw_power_EnableBatteryBrownoutInterrupt(TRUE);
return;
}
//--------------------------------------------------------------------------
// We are about to power the chip from battery. If the battery level is
// at the hard brownout level, the FIQ handler will shut down the chip.
// Set the hard level and enable the battery interrupt.
//--------------------------------------------------------------------------
hw_power_SetBatteryBrownoutCode( g_ddi_power_BatteryBrownOutVoltageCode );
hw_power_EnableBatteryBrownoutInterrupt( true );
// Enforce battery powered operation
hw_power_EnableDcdc(true);
//--------------------------------------------------------------------------
if(hw_power_GetVdddPowerSource() == HW_POWER_EXTERNAL_SOURCE_5V)
{
// When powered from external sources, we need to temporarily
// increase the target to prevent the DCDC from fighting
// with the external source. PMI will change the target to
// the correct voltage after the source transition.
hw_power_SetVdddBrownoutValue(175);
hw_power_SetVdddValue(1575);
ddi_power_WaitForVdddStable();
hw_power_SetVdddBrownoutValue(125);
}
hw_power_SetVdddPowerSource(HW_POWER_DCDC_LINREG_READY);
//--------------------------------------------------------------------------
// Power VDDA and VDDIO from the DCDC.
//--------------------------------------------------------------------------
hw_power_SetVddaPowerSource(HW_POWER_DCDC_LINREG_READY);
hw_power_SetVddioPowerSource(HW_POWER_DCDC_LINREG_ON);
//--------------------------------------------------------------------------
// Disable hardware power down when 5V is inserted or removed
//--------------------------------------------------------------------------
hw_power_Enable5vBrownoutPowerdown( false );
//--------------------------------------------------------------------------
// Transition to battery power went smoothly. Now reset the soft battery
// level for normal battery operation.
//--------------------------------------------------------------------------
hw_power_SetBatteryBrownoutCode( g_ddi_power_SafeBatteryVoltageCode );
hw_power_EnableBatteryBrownoutInterrupt( true );
}
