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Add the option to define a custom user motion size

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This commit is contained in:
Seppe Stas 2018-10-26 11:18:04 +02:00
parent 25f88d48ae
commit 4b16857401
4 changed files with 39 additions and 1 deletions
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3
.gitignore vendored
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@ -41,3 +41,6 @@ gps-sdr-sim-lut
# Netbeans project folder # Netbeans project folder
nbproject/* nbproject/*
# Last used USER_MOTION_SIZE variable
.user-motion-size

19
Makefile
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@ -6,15 +6,32 @@ all: gps-sdr-sim
SHELL=/bin/bash SHELL=/bin/bash
CC=gcc CC=gcc
CFLAGS=-O3 -Wall -D_FILE_OFFSET_BITS=64 CFLAGS=-O3 -Wall -D_FILE_OFFSET_BITS=64
ifdef USER_MOTION_SIZE
CFLAGS+=-DUSER_MOTION_SIZE=$(USER_MOTION_SIZE)
endif
LDFLAGS=-lm LDFLAGS=-lm
gps-sdr-sim: gpssim.o gps-sdr-sim: gpssim.o
${CC} $< ${LDFLAGS} -o $@ ${CC} $< ${LDFLAGS} -o $@
gpssim.o: .user-motion-size
.user-motion-size: .FORCE
@if [ -f .user-motion-size ]; then \
if [ "`cat .user-motion-size`" != "$(USER_MOTION_SIZE)" ]; then \
echo "Updating .user-motion-size"; \
echo "$(USER_MOTION_SIZE)" >| .user-motion-size; \
fi; \
else \
echo "$(USER_MOTION_SIZE)" > .user-motion-size; \
fi;
clean: clean:
rm -f gpssim.o gps-sdr-sim *.bin rm -f gpssim.o gps-sdr-sim *.bin .user-motion-size
time: gps-sdr-sim time: gps-sdr-sim
time ./gps-sdr-sim -e brdc3540.14n -u circle.csv -b 1 time ./gps-sdr-sim -e brdc3540.14n -u circle.csv -b 1
time ./gps-sdr-sim -e brdc3540.14n -u circle.csv -b 8 time ./gps-sdr-sim -e brdc3540.14n -u circle.csv -b 8
time ./gps-sdr-sim -e brdc3540.14n -u circle.csv -b 16 time ./gps-sdr-sim -e brdc3540.14n -u circle.csv -b 16
.FORCE:

16
README.md
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@ -18,6 +18,22 @@ to RF using software-defined radio (SDR) platforms, such as
$ gcc gpssim.c -lm -O3 -o gps-sdr-sim $ gcc gpssim.c -lm -O3 -o gps-sdr-sim
``` ```
### Using bigger user motion files
In order to use user motion files with more than 30000 samples (at 10Hz), the `USER_MOTION_SIZE`
variable can be set to the maximum time of the user motion file in seconds. It is advisable to do
this using make so gps-sdr-bin can update the size when needed. e.g:
```
$ make USER_MOTION_SIZE=4000
```
This variable can also be set when compiling directly with GCC:
```
$ gcc gpssim.c -lm -O3 -o gps-sdr-sim -DUSER_MOTION_SIZE=4000
```
### Generating the GPS signal file ### Generating the GPS signal file
A user-defined trajectory can be specified in either a CSV file, which contains A user-defined trajectory can be specified in either a CSV file, which contains

2
gpssim.h
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@ -16,7 +16,9 @@
#define MAX_CHAN (16) #define MAX_CHAN (16)
/*! \brief Maximum number of user motion points */ /*! \brief Maximum number of user motion points */
#ifndef USER_MOTION_SIZE
#define USER_MOTION_SIZE (3000) // max duration at 10Hz #define USER_MOTION_SIZE (3000) // max duration at 10Hz
#endif
/*! \brief Maximum duration for static mode*/ /*! \brief Maximum duration for static mode*/
#define STATIC_MAX_DURATION (86400) // second #define STATIC_MAX_DURATION (86400) // second