Paul Fertser wrote: > On Fri, Aug 21, 2009 at 07:17:12PM -0700, Svetoslav Trochev wrote: > >> Paul Fertser wrote: >> >>> BTW, for a start you can fix SD power control issues (due to a bad >>> merge the function got fubarred), if you run with SD inserted you'll >>> have extra ~20mA feeding card even in suspend. >>> >>> >> Today I have build my self a current probe for my Neo1973 and did some >> measurements. Here are my results >> 1. Bootloader (splash screen): 0.30-0.32A >> 2. Kernel loads: 0.22-0.28A >> 3. SHR loaded and GSM registered to the network: 0.26A and 0.28A if I >> have uSD card inserted. >> 4. SHR with LED backlight off: 0.18A and 0.19-0.20A with uSD >> > > This all corresponds with what i heard about the device so far. > > >> 5. SHR suspend, GSM on: 0.08A >> > > This one looks strange, guys measured it to be ~45mA with uSD inserted and > ~25mA without. > I measured ~45 / ~25mA most of the time but on two occasions I did see ~75mA, i couldn't reproduce it though. You do see some weird things current wise when gsm is on during suspend.
Psi. >> 6. Neo1973 shutdown from SHR power menu: 0.03A (BAD. I thing the GSM is >> still on) >> > > Yes, it's still on, known problem. We're waiting for Mickey's fix. The > problem is that frameworkd "forgets" to turn the modem off (gta02 has a > hardware switch but for gta01 software needs to write a...@poff several times > to reliably turn the modem off). And it still looks too much, the expected > modem current is about 8mA. > > >> The max charging current I measured is 0.32A with 50% discharged battery >> and SHR in suspend mode. >> > > Considering the limit is 500mA and suspend current according to your > measurements is 0.08, it looks like 100mA went nowhere. Weird. > > >> The charge current after I disconnected the battery for 20s is as >> expected 0.10A. One problem I notice is that u-boot 1.3.1 will power on >> the phone as soon the battery voltage rises. So if you have dippy >> discharged battery the boot might fail and device will hang and draw >> residual current and it will drain the battery even dipper. I believe >> the old u-boot never powered on the phone automatically. >> > > It's supposed that all charging should be done with Linux running, at least > that was the general idea at the time of development. The system should > ensure that it will never discharge the battery too much. Well, easier said > than done. > > BTW, _never_ever_ take out the battery from gta01 running on USB power. It > will destroy it for sure if you don't pull of the cord immediately. > > >> this problems. I will need some help setting up my development >> environment. Currently I am running Ubuntu 8.04LTS. >> > > For kernel hacking all you need is compiler, git and text editor. So, i'd > recommend to install emdebian (i think ubuntu is compatible with it), with > the help of emdebian install the toolchain, then git clone the sources from > git.openmoko.org and start hacking. > > _______________________________________________ devel mailing list devel@lists.openmoko.org https://lists.openmoko.org/mailman/listinfo/devel
