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| author | Eric S. Raymond <esr@thyrsus.com> | 2009-03-02 14:07:32 +0000 |
|---|---|---|
| committer | Eric S. Raymond <esr@thyrsus.com> | 2009-03-02 14:07:32 +0000 |
| commit | f0353549971ff5edd2b6631a9f45f5289c29ca4e (patch) | |
| tree | 735b446d2e2fc5810332b960beed4e50f2892f55 /gpsmon.xml | |
| parent | f737c390dbe646441329d19f31af8ff8f86afc31 (diff) | |
| download | gpsd-f0353549971ff5edd2b6631a9f45f5289c29ca4e.tar.gz | |
Document the fact that parity and stopbit setting is now supported but dicy.
Diffstat (limited to 'gpsmon.xml')
| -rw-r--r-- | gpsmon.xml | 8 |
1 files changed, 8 insertions, 0 deletions
@@ -173,6 +173,14 @@ followed by a colon and a wordlength-parity-stopbits specification in the traditional style, e.g 8N1 (the default), 7E1, etc. Some devices don't support serial modes other than their default, so this command may fail with a message.</para> + +<para>Use this command with caution. On USB and Bluetooth GPSes it is +also possible for serial mode setting to fail either because the +serial adaptor chip does not support non-8N1 modes or because the +device firmware does not properly synchronize the serrial adaptor chip +with the UART on the GPS chipset whjen the speed changes. These +failures can hang your device, possibly requiring a GPS power cycle or (in +extreme cases) physically disconnecting the NVRAM backup battery.</para> </listitem> </varlistentry> |