[Paparazzi-devel] Using ublox GPS receiver with USB

[Martin Mueller]

Hi,

the u-blox Antaris "4" GPS receivers (i.e. LEA-4A) do have an USB 
interface. They implement an USB Communication Device Class (CDC) which 
makes them easy to use.

For a recent Linux kernel, start the cdc-acm kernel module (if not done 
automatically) and use /dev/ttyACM0 as if it was a "normal" serial port.

Windows needs some special treatment. For XP get the 'usbser.sys' from 
'c:\windows\driver cache\i386\drivers.cab' (by double clicking). Copy it 
to the same directory as the attached text (which should be saved in a 
file named antrser.inf). Attach the ublox receiver and feed Windows with 
the antrser.inf. You should now have an additional virtual serial port 
(i.e. COM23).

Some more explanation (and the original .inf file) can be found at 
'linux-2.6.xx/Documentation/usb/gadget_serial.txt'.

Use ucenter (download from http://www.ublox.com - registration required) 
to configure the rx and display data with Windows. For Linux there is a 
simple config tool in cvs at 'paparazzi3/conf/gps'. See source code for 
details. That folder contains the gps configuration files for Paparazzi.

Martin


---snip---
[Version]
Signature="$Windows NT$"
Class=Ports
ClassGuid={4D36E978-E325-11CE-BFC1-08002BE10318}
Provider=%LINUX%
DriverVer=08/17/2004,0.0.2.0
; Copyright (C) 2004 Al Borchers (address@hidden)
; released under GNU General Public License

[Manufacturer]
%LINUX%=GSerialDeviceList

[GSerialDeviceList]
%GSERIAL%=GSerialInstall, USB\VID_1546&PID_01A4

[DestinationDirs]
DefaultDestDir=10,System32\Drivers

[GSerialInstall]
CopyFiles=GSerialCopyFiles
AddReg=GSerialAddReg

[GSerialCopyFiles]
usbser.sys

[GSerialAddReg]
HKR,,DevLoader,,*ntkern
HKR,,NTMPDriver,,usbser.sys
HKR,,EnumPropPages32,,"MsPorts.dll,SerialPortPropPageProvider"

[GSerialInstall.Services]
AddService = usbser,0x0002,GSerialService

[GSerialService]
DisplayName = %GSERIAL_DISPLAY_NAME%
ServiceType = 1                  ; SERVICE_KERNEL_DRIVER
StartType = 3                    ; SERVICE_DEMAND_START
ErrorControl = 1                 ; SERVICE_ERROR_NORMAL
ServiceBinary = %10%\System32\Drivers\usbser.sys
LoadOrderGroup = Base

[Strings]
LINUX = "Linux"
GSERIAL = "GPS RX Serial"
GSERIAL_DISPLAY_NAME = "USB GPS RX Serial Driver"
---snip---