|
|
(3 intermediate revisions by 3 users not shown) |
Line 1: |
Line 1: |
− | On Wed, Jul 16, 2008 at 12:38 PM, Alasal <info@alasal.be> wrote:
| + | #REDIRECT [[GPS Problems]]. |
− | A summary of everything related to the GPS problem.
| + | |
− | | + | |
− | What is the problem?
| + | |
− | - The Openmoko Freerunner have a long TTFF with the SD card in the phone.
| + | |
− | So it takes a long time (10min+) before you get your first GPS data.
| + | |
− | | + | |
− | Does the people of Openmoko know the problem?
| + | |
− | - Yes.
| + | |
− | | + | |
− | Do they work on the problem?
| + | |
− | - Yes, they are actively searching for a solution.
| + | |
− | | + | |
− | | + | |
− | What is TTFF?
| + | |
− | - This is the time to first fix of the GPS. This is the time the GPS has
| + | |
− | needed to get the first clue on where you are on planet earth. So you have
| + | |
− | to do this only once. After you have a FF (first fix), you can get more
| + | |
− | fixes without any problems with the SD card in the phone.
| + | |
− | | + | |
− | So if we have a first fix, the SD card isn't blocking the GPS anymore?
| + | |
− | - yes, the SD card isn't blocking the GPS if we have a first fix. (Some
| + | |
− | people even claim it's more stable)
| + | |
− | | + | |
− | Does they have a solution?
| + | |
− | - yes. Their is already a highly alpha software workaround. The software
| + | |
− | just disables the SD card when the GPS tries to get it's first fix They are
| + | |
− | also examine a hardware solution.
| + | |
− | | + | |
− | Do we have to return our Freerunners to Openmoko?
| + | |
− | - Probably not, because the software workaround should work too.
| + | |
− | | + | |
− | But we can't read of the SD card when the GPS is on?
| + | |
− | - Wrong, you will be able to read the SD card when the GPS is on. You will
| + | |
− | probably not be able to read the SD card when you're starting the GPS (appr.
| + | |
− | 30 sec), because the GPS will only block the SD card when it's searching
| + | |
− | it's first fix. After that you will be able to read the SD card again.
| + | |
− | | + | |
− | Is their a better software solution?
| + | |
− | - Maybe. From reading the mailing list, I have understood that half the
| + | |
− | Openmoko team is looking into this bug. All this information is only 1 ÃÂ 2
| + | |
− | days old and the bug is also young, so I suspect they can finetune the
| + | |
− | software workaround and make it only slowdown the SD card or even better.
| + | |
− | | + | |
− | Did Openmoko test the GPS with a SD card in it?
| + | |
− | - yes
| + | |
− | | + | |
− | Whey didn't they find it while testing the Freerunner?
| + | |
− | - Because they have to do the tests with a fake GPS signal and with that
| + | |
− | signal it worked. (In a fab you haven't a decent GPS signal) They already
| + | |
− | have modified the test, so it correspond the GPS signal better.
| + | |
− | | + | |
− | Summary of the summary:
| + | |
− | You will be able to use the SD card in the same time of the GPS except for
| + | |
− | the first appr 30 seconds. (And that's the worst case, because maybe
| + | |
− | Openmoko can find better hacks/fixes)
| + | |
− | | + | |
− | [[Category:GTA02 Hardware]] | + | |
− | [[Category:GPS]]
| + | |