bool Is5vPresent( void )
{
return ( IsVbusValid() || IsVdd5vGtVddio() );
}
////////////////////////////////////////////////////////////////////////////////
//! \brief
//!
//! \return
////////////////////////////////////////////////////////////////////////////////
int PowerPrep_ConfigurePowerSource( void )
{
int iReturnValue = SUCCESS;
/* initialize DCDC operating parameters */
hw_power_Init();
#ifdef NO_DCDC_BATT_SOURCE
/* device configured for no source to DCDC_BATT input (5V only power
* source). This boot option doesn't waste time looking for a good
* battery. Battery powered operation and automatic voltage
* measurements are disabled.
*/
// set bit 11 of PERSISTENT1
HW_RTC_PERSISTENT1_SET(0x800);
// clear bit 12 PERSISTENT1
HW_RTC_PERSISTENT1_CLR(0x1000);
bBatteryReady = false;
bBatteryGood = false;
printf("\r\nConfigured for 5v only power source.\
Battery powered operation disabled.\r\n");
/* Disable automatic battery voltage measurements which seem unnecessary
* for this configuration.
*/
BF_SET(POWER_BATTMONITOR,EN_BATADJ);
BF_CLR(LRADC_CONVERSION, AUTOMATIC);
BF_WR(POWER_BATTMONITOR, BATT_VAL,525); //4200/8
HW_POWER_BATTMONITOR.B.BRWNOUT_LVL = BATTERY_BRWNOUT_BITFIELD_VALUE;
iReturnValue = PowerPrep_5vBoot();
#ifndef MXS_VBUS_CURRENT_DRAW
PowerPrep_CPUClock2PLL();
#endif
#elif defined(NO_VDD5V_SOURCE)
printf("\r\nConfigured for DCDC_BATT only power source.\r\n");
#ifdef mx28
/* We only care about the DCDC_BATT source in this configuration */
BF_SET(POWER_BATTMONITOR,PWDN_BATTBRNOUT_5VDETECT_ENABLE);
#endif
// clear bit 11 PERSISTENT1
HW_RTC_PERSISTENT1_CLR(0x800);
// set bit 12 PERSISTENT1
HW_RTC_PERSISTENT1_SET(0x1000);
/* since the DCDC_BATT input is our only source, we'll assume
* it is good and attempt to boot. If your device has uses
* this configuration but has a external DCDC_BATT source
* that takes time to ramp, you could add a voltage check
* and wait here until voltage reaches near the final level to
* avoid trigger a battery brownout when the voltage is too
* low.
*/
bBatteryReady = true;
/* bBatteryGood is not used for this configuration */
/* bBatteryGood = don't care */
/*Boot from DCDC_BATT source*/
iReturnValue = PowerPrep_BattBoot();
PowerPrep_CPUClock2PLL();
/* raise battery brownout level to programmed value. */
PowerPrep_InitBattBo();
/* Configured to not use a VDD5V source */
HW_POWER_5VCTRL_SET(BM_POWER_5VCTRL_ILIMIT_EQ_ZERO);
#else
//clear bit 11 and 12 of PERSISTENT1
HW_RTC_PERSISTENT1_CLR(0x1800);
/* check if Battery Voltage is high enough for full
* power operation.
*/
bBatteryReady = PowerPrep_IsBatteryReady();
if(!IsVdd5vGtVddio())
{
/* this option allows for fast booting without
* the unecessary delay required for proper
* battery detection when booting from 5v.
*/
/* battery voltage is present and 5v is not connected,
* assume valid battery voltage source is present. Battery
* brownout protection will take care of supply protection
* if battery becomes invalid in the future
*/
bBatteryGood = true;
printf("\r\nboot from battery. 5v input not detected\r\n");
/*Boot from battery*/
iReturnValue = PowerPrep_BattBoot();
PowerPrep_CPUClock2PLL();
}
else
{
/* 5v input detected, boot from 5V.
*/
bBatteryGood = PowerPrep_IsBatteryGood();
if(!bBatteryGood) {
BF_CLR(LRADC_CONVERSION, AUTOMATIC);
BF_WR(POWER_BATTMONITOR, BATT_VAL,0);
printf("\r\nNo battery or bad battery\
detected!!!.Disabling battery\
voltage measurements./r/n");
}
iReturnValue = PowerPrep_5vBoot();
#ifndef MXS_VBUS_CURRENT_DRAW
PowerPrep_CPUClock2PLL();
#endif /* MXS_VBUS_CURRENT_DRAW */
}
////////////////////////////////////////////////////////////////////////////////
//! \brief
//!
//! \return
////////////////////////////////////////////////////////////////////////////////
int PowerPrep_ConfigurePowerSource( void )
{
int iReturnValue = SUCCESS;
/* initialize DCDC operating parameters */
hw_power_Init();
#ifdef NO_BATTERY_VOLTAGE_SOURCE
/* device configured for "no battery" operation (5V only power source). This boot
* option doesn't waste time looking for a good battery. Battery powered
* operation and automatic voltage measurements are disabled.
*/
bBatteryReady = false;
bBatteryGood = false;
printf("\r\nConfigured for 5v only power source.\
Battery powered operation disabled.\r\n");
/* disable automatic battery voltage measurements */
BF_CLR(LRADC_CONVERSION, AUTOMATIC);
BF_WR(POWER_BATTMONITOR, BATT_VAL,0);
iReturnValue = PowerPrep_5vBoot();
#ifndef MXS_VBUS_CURRENT_DRAW
PowerPrep_CPUClock2PLL();
#endif
#else
/* check if Battery Voltage is high enough for full
* power operation.
*/
bBatteryReady = PowerPrep_IsBatteryReady();
if(!IsVdd5vGtVddio())
{
/* this option allows for fast booting without
* the unecessary delay required for proper
* battery detection when booting from 5v.
*/
/* battery voltage is present and 5v is not connected,
* assume valid battery voltage source is present. Battery
* brownout protection will take care of supply protection
* if battery becomes invalid in the future
*/
bBatteryGood = true;
printf("\r\nboot from battery. 5v input not detected\r\n");
/*Boot from battery*/
iReturnValue = PowerPrep_BattBoot();
PowerPrep_CPUClock2PLL();
}
else
{
/* 5v input detected. Now we need to determine if a
* valid battery source is present to decide which
* power source to use during bootup.
*/
bBatteryGood = PowerPrep_IsBatteryGood();
if(!bBatteryReady)
{
if(bBatteryGood)
/* control arrives here if the battery voltage source
* appears to be chargeable but the voltage is current
* too low to use as a reliable battery voltage source.
*/
printf("\r\nChargeable battery detected but\
the voltage is too low for battery\
powered operation.Booting from 5V\
power source.\r\n");
else {
BF_CLR(LRADC_CONVERSION, AUTOMATIC);
BF_WR(POWER_BATTMONITOR, BATT_VAL,0);
printf("\r\nNo battery or bad battery\
detected!!!.Disabling battery\
voltage measurements./r/n");
}
iReturnValue = PowerPrep_5vBoot();
#ifndef MXS_VBUS_CURRENT_DRAW
PowerPrep_CPUClock2PLL();
#endif /* MXS_VBUS_CURRENT_DRAW */
}
else
{
printf("\r\n5v source detected.Valid battery\
voltage detected.Booting from battery\
voltage source.\r\n");
/*Boot from battery*/
iReturnValue = PowerPrep_BattBoot();
PowerPrep_CPUClock2PLL();
}
}