Re: Can't boot Freerunner without battery - Was: Re: unable to start up freerunner after batterie was full down
I assume this is planned, but I'll go ahead an say it. I think the Freerunner should have a software feature to detect when the battery is critically low and shutdown. Ideally, the boot process would also check the battery and refuse to boot(or at least require override) if the battery charge was below the critical mark. This would prevent the state where you have a dead battery and no way to charge it. Either this feature or the ability to boot from USB is a must for the end-user software load. I personally had no plans to buy extra batteries or external chargers. I would hate to have to should I lose track of my charge status and screw myself. -Steven On Mon, Jul 14, 2008 at 11:12 AM, Al Johnson [EMAIL PROTECTED] wrote: The phone can't take 100mA from USB without asking, and the PMU enforces this. The AC PSU can supply more than this, as can most USB ports, but at this stage of the process the checks to see if this is available can't be done so we're limited to 100mA. When the old uBoot powered up the assorted chips the current would spike higher than 100mA which was fine with battery, but without battery the PMU would cut the power to stop violation of the USB 100mA limit. The new uBoot changes the power up sequence to try to keep the current below 100mA at all times. That's a rough outline anyway - full discussion in the kernel list archive. On Monday 14 July 2008, Steven ** wrote: The battery can delivery more power than the AC USB adapter? -Steven On Mon, Jul 14, 2008 at 1:18 AM, Joerg Reisenweber [EMAIL PROTECTED] wrote: Am Mo 14. Juli 2008 schrieb Steven **: Perhaps it's been said before and I missed it... But why can't the Neo boot off USB power alone? Boils down to sth like powering up a whole town after blackout. All components drawing a spike of energy same moment, which USB can't deliver. -next blackout. Werner's new U-boot extenuates this somewhat, but as much of this is inside PMU hardcoded, SW can't do much. /jOERG ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Can't boot Freerunner without battery - Was: Re: unable to start up freerunner after batterie was full down
Werner has submitted 10 patches. see http://lists.openmoko.org/pipermail/openmoko-kernel/2008-July/003799.html It should no longer be a problem On Tue, Jul 15, 2008 at 6:09 PM, Steven ** [EMAIL PROTECTED] wrote: I assume this is planned, but I'll go ahead an say it. I think the Freerunner should have a software feature to detect when the battery is critically low and shutdown. Ideally, the boot process would also check the battery and refuse to boot(or at least require override) if the battery charge was below the critical mark. This would prevent the state where you have a dead battery and no way to charge it. Either this feature or the ability to boot from USB is a must for the end-user software load. I personally had no plans to buy extra batteries or external chargers. I would hate to have to should I lose track of my charge status and screw myself. -Steven On Mon, Jul 14, 2008 at 11:12 AM, Al Johnson [EMAIL PROTECTED] wrote: The phone can't take 100mA from USB without asking, and the PMU enforces this. The AC PSU can supply more than this, as can most USB ports, but at this stage of the process the checks to see if this is available can't be done so we're limited to 100mA. When the old uBoot powered up the assorted chips the current would spike higher than 100mA which was fine with battery, but without battery the PMU would cut the power to stop violation of the USB 100mA limit. The new uBoot changes the power up sequence to try to keep the current below 100mA at all times. That's a rough outline anyway - full discussion in the kernel list archive. On Monday 14 July 2008, Steven ** wrote: The battery can delivery more power than the AC USB adapter? -Steven On Mon, Jul 14, 2008 at 1:18 AM, Joerg Reisenweber [EMAIL PROTECTED] wrote: Am Mo 14. Juli 2008 schrieb Steven **: Perhaps it's been said before and I missed it... But why can't the Neo boot off USB power alone? Boils down to sth like powering up a whole town after blackout. All components drawing a spike of energy same moment, which USB can't deliver. -next blackout. Werner's new U-boot extenuates this somewhat, but as much of this is inside PMU hardcoded, SW can't do much. /jOERG ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Can't boot Freerunner without battery - Was: Re: unable to start up freerunner after batterie was full down
Am Mo 14. Juli 2008 schrieb Steven **: Perhaps it's been said before and I missed it... But why can't the Neo boot off USB power alone? Boils down to sth like powering up a whole town after blackout. All components drawing a spike of energy same moment, which USB can't deliver. -next blackout. Werner's new U-boot extenuates this somewhat, but as much of this is inside PMU hardcoded, SW can't do much. /jOERG signature.asc Description: This is a digitally signed message part. ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Can't boot Freerunner without battery - Was: Re: unable to start up freerunner after batterie was full down
The battery can delivery more power than the AC USB adapter? -Steven On Mon, Jul 14, 2008 at 1:18 AM, Joerg Reisenweber [EMAIL PROTECTED] wrote: Am Mo 14. Juli 2008 schrieb Steven **: Perhaps it's been said before and I missed it... But why can't the Neo boot off USB power alone? Boils down to sth like powering up a whole town after blackout. All components drawing a spike of energy same moment, which USB can't deliver. -next blackout. Werner's new U-boot extenuates this somewhat, but as much of this is inside PMU hardcoded, SW can't do much. /jOERG ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Can't boot Freerunner without battery - Was: Re: unable to start up freerunner after batterie was full down
The phone can't take 100mA from USB without asking, and the PMU enforces this. The AC PSU can supply more than this, as can most USB ports, but at this stage of the process the checks to see if this is available can't be done so we're limited to 100mA. When the old uBoot powered up the assorted chips the current would spike higher than 100mA which was fine with battery, but without battery the PMU would cut the power to stop violation of the USB 100mA limit. The new uBoot changes the power up sequence to try to keep the current below 100mA at all times. That's a rough outline anyway - full discussion in the kernel list archive. On Monday 14 July 2008, Steven ** wrote: The battery can delivery more power than the AC USB adapter? -Steven On Mon, Jul 14, 2008 at 1:18 AM, Joerg Reisenweber [EMAIL PROTECTED] wrote: Am Mo 14. Juli 2008 schrieb Steven **: Perhaps it's been said before and I missed it... But why can't the Neo boot off USB power alone? Boils down to sth like powering up a whole town after blackout. All components drawing a spike of energy same moment, which USB can't deliver. -next blackout. Werner's new U-boot extenuates this somewhat, but as much of this is inside PMU hardcoded, SW can't do much. /jOERG ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
