I2C and GPS

Benjamin Deering ben_deering at swissmail.org
Thu Nov 24 12:44:22 CET 2011

With the i2c devices removed, I get TTFF of around 1 minute in 
shr-core.  It sounds like putting ferrite beads on SDA and SCL might 
help reduce EMI, so I will try that when I get a chance.


On 11/23/2011 05:06 PM, dmatthews.org wrote:
> On Tue, 22 Nov 2011 21:20:16 -0500
> Benjamin Deering<ben_deering at swissmail.org>  wrote:
> Hi Ben
> Not sure this is relevent to you, but I now have the fastest GPS fix I've ever had on the freerunner.
> QTMoko v35 and I put this in /etc/default/gpsd:-
> DEVICES="/dev/ttySAC1"
> USBAUTO="false"
> GPSD_SOCKET="/var/run/gpsd.sock"
> Before doing this it was pretty poor - worse than earlier versions of qtmoko and much worse than every SHR I've tried. On a reasonably clear day I now reliably get a fix in under a minute, sometimes within a few seconds.
> The only other varying factor (doubtful relevence) is that I got pissed with QTMoko and to a lesser extent SHR foobarring the SD card, so I'm now running from the card instead of NAND and everything is pretty good

More information about the community mailing list