Re: External GPS antenna question
BTW, anyone have any info on the radiation pattern of the internal antenna? Rúben Em Seg, Julho 6, 2009 13:31, Helge Hafting escreveu: Tomasz Suchan wrote: Hi Armin, I use the atenna for GPS Tracking during biking and car tours. As the FR is always running (no sleep) and with activated GPS module - the battery last about 4h - then it's empty. Is accuracy much better with external antenna? If the external antenna can be placed in a better location than the internal one - or if it gets better signal strength. An external antenna on the car roof may see more satellites than the FR sitting on the dashboard, because that metal roof block radio transmission. Now, the FR will see many satellites even inside a car, but those signals cannot penetrate directly through the roof. Some satellites will be seen directly through windows. Signals from the rest may bounce off the hood and come in through windows, or diffract (bend) around the roof edge. Such redirected signals are weaker, and they give greater position error. The latter because they really give the position where your FR would have been, _if_ the signal had not been diffracted or reflected. The GPS receiver is smart, and will discard data from satellites that seem to disagree with the rest. But there are two problems with this: * An extra satellite that gets discarded no longer helps improving accuracy. * If two groups of satellites seems to disagree on position, then the receiver could lock onto the wrong group for a while. An external antenna see all the satellites directly, and don't suffer such problems. Unless you are near tall buildings or mountainsides, which cause the same kind of problems. So an external antenna is great if you have a roof above you. Such as in a car or boat. The problems above don't happen on a bike. Still, an external antenna might help, it may be bigger/better than the internal antenna and get more from a weak signal. For example, if you move around in heavy rain in a forest. Helge Hafting ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community -- Rúben Leote Mendes -- ru...@netureza.pt ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Detecting headset button press
Em Qua, Abril 29, 2009 09:47, Helge Hafting escreveu: Ruben Leote Mendes wrote: Hi, I followed the Freerunner schematics and the heaset button seems to be connected to EINT7/GPF7 so it seems it is possible to find out in software if the button is pressed. What is the best way to do it? Check to see if it is interpreted as a normal key already. enlightenment can assign some actions to keys, that is how the two regular buttons are handled. Go into that setup, press the key and see if you get a keycode. If so, you can assign an enlightenment action. If you want to use it outside of e, run something like xev to check what keycode is produced. Then write software to listen for it. Thanks. I'll try that when I get my hands on a 2.5 4-ring jack. I currently do not own a compatible headset, but have an application in mind that needs a push button because touchscreen is not an option. -- Rúben Leote Mendes -- ru...@nocturno.org ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Detecting headset button press
Em Qua, Abril 29, 2009 09:50, Rui Miguel Silva Seabra escreveu: On Tue, Apr 28, 2009 at 10:51:22PM +0100, Ruben Leote Mendes wrote: I followed the Freerunner schematics and the heaset button seems to be connected to EINT7/GPF7 so it seems it is possible to find out in software if the button is pressed. What is the best way to do it? Hey finally playing with it? Cool! :D Sort of. It might seem strange but it's not for use as a phone that I want to read the headset button. I still use another phone for that. :-( -- Rúben Leote Mendes -- ru...@nocturno.org ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Detecting headset button press
Hi, I followed the Freerunner schematics and the heaset button seems to be connected to EINT7/GPF7 so it seems it is possible to find out in software if the button is pressed. What is the best way to do it? Thanks. -- Rúben Leote Mendes -- ru...@nocturno.org ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: [2008.12] Help with Om.2008.12 on microsd
Em Sab, Dezembro 27, 2008 04:06, Kosa escreveu: I've been trying to boot 2008.12 from a microsd but it just can't. It starts booting but then it stops with an Only GTA01 hardware supported by ASoc driver message. Happens to me also, but after that message I also have the following messages (not sure if they change from boot to boot): Unknown HZ value! (87) Assume 100. mount: special device /dev/mmcblkp01 does not exist ALSA: restoring mixer settings... Configuring network interfaces... /usr/sbin/alsactl: load_state:1327: No soundcards found... ADDRCONF(NETDEV_UP): usb0: link is not ready done. I can shutdown by holding the power button. I have FDOM in the same card and it works fine. Any clues? -- Rúben Leote Mendes -- ru...@nocturno.org ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: [2008.12] Help with Om.2008.12 on microsd
Em Ter, Dezembro 30, 2008 14:26, Andy Green escreveu: I was just meddling with this in NAND, I believe that ro on the kernel commandline is fatal for startup of 2008.12. When I removed it from Qi, 2008.08 started up OK. So check your U-Boot env if you're using that for ro, or try adding rw to /boot/append-GTA02 if you are on SD Card and Qi. That's it. Removed ro from u-boot and 2008.12 started fine. Thanks! -- Rúben Leote Mendes -- ru...@nocturno.org ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: [2008.12] Help with Om.2008.12 on microsd
Em Ter, Dezembro 30, 2008 14:51, Ed Kapitein escreveu: did you try so set the glamo_mci.sd_max_clk, acording to: http://docs.openmoko.org/trac/ticket/1743 ? I solved the problem with Andy's suggestion of removing ro from u-boot (see another message I just sent). This was with an 8GB card from Kingston. I tried the glamo_mci.sd_max_clk with another card I have (Transcend 4GB) that doesn't work and it did not help. Any other tricks that I should try to get this card to work? -- Rúben Leote Mendes -- ru...@nocturno.org ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
