This procedure source for GPS receiver, including the capture, tracking, positioning solvers and algorithms, as well as the NMEA protocol, and its hardware-based gp2015 and gp2021, the operating system to linux, processor arm7, understanding the principle of GPS receivers have very big help.

osgps
.....\.depend
.....\90-osgps.rules
.....\BCCDOS.CFG
.....\changes.log
.....\CMatrix3.cpp
.....\CMatrix3.h
.....\consts.h
.....\correlator.c
.....\correlator.h
.....\CVS
.....\...\Entries
.....\...\Entries.Log
.....\...\Repository
.....\...\Root
.....\display.c
.....\display.h
.....\file.h
.....\FwInter.c
.....\FwInter.h
.....\getopt
.....\......\CVS
.....\......\...\Entries
.....\......\...\Repository
.....\......\...\Root
.....\......\getopt.c
.....\......\getopt.h
.....\......\getopt_int.h
.....\globals.h
.....\gp2021.c
.....\gp2021.h
.....\gpsfuncs.c
.....\gpsfuncs.h
.....\gpsisr.c
.....\gpsisr.h
.....\gpsrcvr.c
.....\GPSRCVR.DSW
.....\gpsrcvr.h
.....\GPSRCVR.IDE
.....\GPSRCVR.MAK
.....\HW_files.def
.....\interfac.c
.....\interfac.h
.....\irq.c
.....\linuxmod.c
.....\linuxusr.c
.....\Makefile
.....\nav_fix.c
.....\nmea.c
.....\nmea.h
.....\osgps
.....\.....\BCCDOS.CFG
.....\.....\changes.log
.....\.....\CMatrix3.cpp
.....\.....\CMatrix3.h
.....\.....\consts.h
.....\.....\correlator.c
.....\.....\correlator.h
.....\.....\CVS
.....\.....\...\Entries
.....\.....\...\Entries.Log
.....\.....\...\Repository
.....\.....\...\Root
.....\.....\display.c
.....\.....\display.h
.....\.....\file.h
.....\.....\FwInter.c
.....\.....\FwInter.h
.....\.....\getopt
.....\.....\......\CVS
.....\.....\......\...\Entries
.....\.....\......\...\Repository
.....\.....\......\...\Root
.....\.....\......\getopt.c
.....\.....\......\getopt.h
.....\.....\......\getopt_int.h
.....\.....\globals.h
.....\.....\gp2021.c
.....\.....\gp2021.h
.....\.....\gpsfuncs.c
.....\.....\gpsfuncs.h
.....\.....\gpsisr.c
.....\.....\gpsisr.h
.....\.....\gpsrcvr.c
.....\.....\GPSRCVR.DSW
.....\.....\gpsrcvr.h
.....\.....\GPSRCVR.IDE
.....\.....\GPSRCVR.MAK
.....\.....\HW_files.def
.....\.....\interfac.c
.....\.....\interfac.h
.....\.....\irq.c
.....\.....\linuxmod.c
.....\.....\linuxusr.c
.....\.....\Makefile
.....\.....\nav_fix.c
.....\.....\nmea.c
.....\.....\nmea.h
.....\.....\PCI.ASM
.....\.....\pci.h

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