Paul Fertser wrote: >> 5. SHR suspend, GSM on: 0.08A >> > > This one looks strange, guys measured it to be ~45mA with uSD inserted and > ~25mA without. > > >> 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. > Now I think into addition of the problem with uSD drawing ~20mA there is one more problem. I still can not account for the ~0.05A (0.08A - 0.03A) in suspend mode. To me looks like other hardware is powered in suspend. I don't fully understand yet how the phone works, but I would like to think that everything should be turned off in suspend and the GSM should be in stand-by. In addition the 0.03A drawn by the GSM is kinda high. We have a 1200mAh battery if the phone stays in stand-by all the time it will run out of power in 40h. My old Palm can last much longer in stand-by in comparison. I am wondering if we can make the GSM to draw less power while the GSM is on and registered?! >> 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. > Well I think because the battery was at 50% charged the PMU chip was not using the full current to charge it. I need to read the specifications and understand the logic of the pcf50606 first. Other issue here could be that my USB port could not provide the full 500mA. I need to build current probe for the USB port and measure the current there also. > >> 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. > Opps. I think I have done this many times! I hope I have not burn something already! What part of the phone will be damaged in this case?
Also I have found out there is small backup battery connected to the pcf50606, because I kept my phone for very long time with no power it most likely is drained completely. What would be the symptoms for this problem? I suspect that backup battery preserves some kind of RTC and the state of the pcf50606. >> 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 If I am understanding everything correctly so far, I should use the kernel described here: http://wiki.openmoko.org/wiki/Kernel http://wiki.openmoko.org/wiki/Kernel_Plans Right? Thanks, Paul _______________________________________________ devel mailing list devel@lists.openmoko.org https://lists.openmoko.org/mailman/listinfo/devel
