Given the performance degradation in GPS lock cause by high SD drive
strength and the i2c being on flying leads right next to the antenna I
certainly wouldn't rule it out.
On 11/24/2011 01:49 PM, Lars Poulsen wrote:
Hi
You can try to add a series resistor to the signals or reducing the
drive strength of the driver.
The frequency of the signals are not that important but rather the rise
time.
This is usually not a problem om i2c but who knows.
On 24/11/2011, at 14.17, Dave <dave...@gmail.com
<mailto:dave...@gmail.com>> wrote:
Hi,
Ferrite beads aid with removing VHF-SHF feedback and/or uncontrolled
oscillation mainly. I cannot see why they would be of use on a
(500khz?) I2C bus. At that frequency they would have minimal effect.
On Thu, Nov 24, 2011 at 9:44 PM, Benjamin Deering
<ben_deer...@swissmail.org <mailto:ben_deer...@swissmail.org>> wrote:
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.
Ben
On 11/23/2011 05:06 PM, dmatthews.org <http://dmatthews.org> wrote:
On Tue, 22 Nov 2011 21:20:16 -0500 <tel:16%20-0500>
Benjamin Deering<ben_deering@swissmail.__org
<mailto:ben_deer...@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:-
START_DAEMON="true"
GPSD_OPTIONS=""
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
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