On 29.1.2016 17:31, Aleksander Morgado wrote:
On Fri, Jan 29, 2016 at 1:00 AM, Tomas Jura <[email protected]> wrote:
The quick open/close action after the gps unmanaged end (patch #4 "flush
unmanaged GPS port after GPS is stopped") serves for draining the remaining
GPS sentences from the gps port. Without the drain some gps sentences can
remain in the input buffer and those debris are offered as an input during
the next gps read (for example after few hours). Reading such trash confuses
the reader of GPS sentences. The modes NMEA and RAW do the drain of the port
(during close). My patch just introduce the "drain and close" scenario to
the unmanaged mode.
What about the AT*E2GPSCTL=0 command on disabling GPS? Does it not
need to go to the GPS data port, as we did when enabling GPS? If that
is the case, the open/close would be implicit as we need to send an AT
command.
The AT*E2GPSCTL=0 goes into the control port, not to the gps data port.
Patch drains the gps data port.
AFAIK the gps data port is not usable as a control port once switched to
the gps data mode.
(source: http://www.natisbad.org/E4300/Dell_Wireless_5530_AT_cmd_ref.html)
T.
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