GPS software fix, just CRUFT?

Andy Green andy at openmoko.com
Thu Jul 24 16:59:46 CEST 2008


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Somebody in the thread at some point said:
| On Thursday 24 July 2008, Scott wrote:
|> Joerg Reisenweber wrote:
|>> Am Di  22. Juli 2008 schrieb Scott Derrick:
|>>> With the GPS hardware fix done(10pf cap installed) are the software
|>>> changes to the kernel/modules just added cruft?  IE. do they add
|>>> anything useful?
|>> SW is definitely better than C, it works on data-rails as well. Those
|>> might spill GPS during access even while the clock is fixed by a C.
|>> /jOERG
|> Can somebody translate this?
|
| The software fix is better than the capacitor because it works on all
lines to
| the card, not just the clock. With just the capacitor on the clock
line the
| other lines may give enough interference to upset the GPS during card
access.
|
| That's my translation anyway.

Yep.

| Another question - might the added capacitor on the clock line cause
problems
| with the lower drive strength that's now default?

It was tested in .tw with some 100MB files on shipping Sandisk card,
didn't make trouble.

- -Andy
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