REV-2000 is an evaluation kit for Royaltek GPS
series, RGM-2101/ RGM-3000/ REB-12R /
REB-2101。It is convenient to test the GPS
performance、cold start / warm start / hot start、
position update and so on by using the REV-2000.
REV-2000 helps you understand the operation and
performance of Royaltek’s GPS in a couple of
minutes. It can also provide you to design the OEM
products that use RoyalTek’s GPS .
Power switch ( SW1 )
The Power switch is for power ON or OFF .
Power mode switch ( SW2 )
The power adapter of REV-2000 is 110V AC/ 7.5V
DC adaptor. It converts the 110 AC to DC.
RoyalTek can also provide you 220V AC power
adapter. Beware of the AC power of your office and
tell RoyalTek’s sales person for preparing the
correct power code for you.
REV-2000 provides 2 power modes on borad, 3.3V
and 5V. SW2: Left for +5V, Right for 3.3V. The
3.3V is for RGM-2101/ RGM-3000 / REB-2101.
The 5V is for REB-12R.
Transmitting switch ( SW4 、、、、SW3 )
RS232 TO RS232 : convert the signal from RS232
to RS-232 connecting to PC use P1.
TTL TO RS232 : convert the signal from TTL to
DC input is from 6.5V ~ 12V. We suggest you
use +7.5V as the DC input.
Reset switch
It is used for external reset.
Wakeup switch
It is used for external wakeup.
P1
This is NMEA/SiRF protocol output/input port.
Please connect it to PC or Laptop RS-232 port.
P2
This is DGPS input port.
P3
This is NMEA/SiRF protocol output/input port.
Please connect it to PC or Laptop USB port.
CON20D/CON20U
This is the socket for REB-12R. Please refer the
RS-232 connecting to PC use P1. TTL TO USB :
convert the signal from TTL to USB connecting to
PC use P3.
LXHS/LXHA switch ( SW5 )
It can choice the LXHS or LXHA of REB-12R.
BATTERY switch ( SW6 )
Enable: The battery will supply the power to engine
board or module.
Disable: The battery disconnected with engine
board or module.
BOOT switch
The BOOT switch is for program upgrade. When
push the BOOT switch, the GPS engine board is
waiting for program upgrade and output nothing
when running SiRF demo program.
Please refer the program upgrade session for
program update.
hardware interface section for the pin
assignment.
CON8
This is the socket for RGM-2101 or REB-2101.
Please refer the hardware interface section for the
pin assignment.
CON22
This is the socket for RGM-3000. Please refer
the hardware interface section for the pin
assignment.
RS-232 setup procedure
(1) Plug the REB-12R on the CON20D /
CON20U or Plug the RGM-2101 / REB-2101
on the CON8 or Plug the RGM-3000 on the
CON22
(2) Plug the active antenna into the external
DC input
The power input can be DC input instead of
using AC power adapter. The input range of the
antenna connector. The suitable view angle of
the active antenna is necessary. Caution:
Step 2: After plug to USB connector to your
Notebook PC or Handheld PC, it will automatically
detect the hardware and show up pop-up dialog as
follows. Click “Next>” button.
Assert the “Search for the best driver for your device”.
Click “Next>” button.
Copy the SiRFDemo.exe from the CD-ROM
\Toolkit\SiRFDemo to the destination path, e.g.
“c:\RoyakTek\REV-2000\Demo”. Add a shortcut of
SiRFdemo.exe on the desktop of Windows 98.
To use Sirfdemo.exe
(1) Double click the SiRFdemo.exe.
(2) Choose the “Supplied Data” radio button.
Click the “Instrument(Measured Data)” check
box.
(3) Select the serial port, e.g. COM1. The default
Satellite Number (SV) GPS satellite PRN number
Status (St) Satellite status
Azimuth (Az) Satellite azimuth (in degrees)
Elevation (EI) Satellite elevation (in degrees)
C/No Signal level (in dB-Hz)
Signal Level (-5 sec) 5-second history
Tracking view:
Green: Satellite is tracked and used to
calculate the navigation solution.
Blue: Satellite is tracked but is not used to
calculate the navigation solution.
Red: Satellite is lost tracked.
Development data view: It is for
development purpose not for user.
Map View: Demonstrate the GPS time,
Latitude, Longitude, Altitude and
Navigation mode etc.
Initialize Data Source
Click the
It provides the cold start, warm start and hot
start test functions. The receiver initialization
view is like follows:
The definition of cold start, warm start and hot start is described as following table:
Option
Hot Start The Evaluation Unit restarts by using values stored in the internal of the GPS receiver.
Warm Start (No init) This option has the same functionality as Hot Start except that Ephemeris data and
Warm Start (init) This option clears all initialization data in the GPS receiver and subsequently reloads the
Cold Start This option clears all data that is currently stored in the internal memory of the GPS
Description
retains all other data.
data that is currently displayed in the GPS receiver initialization is cleared.
receiver including position, almanac, ephemeris, time, and clock drift.
To switch from SiRF protocol to NMEA protocol
(1)Select the “Action/Switch to NMEA Protocol” like follows.
(2) After you select the “Switch to NMEA Protocol”, it will show up a “Select NMEA Messages” dialog. Select
the NMEA Messages that you want to use.
(3) Determine the update rate for each NMEA
message
(4) Select the baud rate that you want to use from
the Baud Rate pull down menu.
(5) Click the OK button to save or Cancel button to
exit
(6) It will switch to NMEA protocol.
To Synchronize Protocol
When you don’t know what the protocol/baud
rate is set , you can use this option to synchronize
protocol. Select the Action/Synchronize Protocol
and Baud Rate. It will synchronize the protocol
and Baud Rate.
To Switch Trickle Power Parameters
from SiRFDemo.exe
There are two modes of low power operation:
(1) Trickle power: In TricklePower mode, the
power to is cycled periodically, so that it
operates only a fraction of the time.
(2) Push to fix: In Push-to-Fix mode, the receiver
is generally off, but turns on frequently enough
to collect ephemeris. So that, upon user
request, a position fix can be provided quickly
after power-up.
To enable trickle power mode from SiRFdemo.exe,
please select the “Action/Set TricklePower
Parameters” like following picture.
Then, it will show a “TricklePower parameters”
dialog for parameters setting. There are two
parameters of Trickle power that needs to be set,
“Update Rate and On Time”. The “Update Rate”
means the navigation update frequency. For example,
“1 sec” means output once per second and “2 sec”
means output once per 2 seconds. The “On time”
means running time in the output period. For
example, “200 ms” means the running time is 200
ms per navigation update. The duty cycle of trickle
power is determined by setting of “Update Rate” and
“On Time”. For example, if the “Update Rate” is 1
sec and “On time” is 200ms, the duty cycle is
200ms/1000ms = 20%. If the “Update Rate” is 2 sec
and “On Time” is 300 ms, the duty cycle is
300ms/2000ms = 15%. The duty cycle is limited to
5% ~ 50%. Since it will do some estimation in
trickle power, please tune the proper duty cycle that
can compromise the power consumption and
acceptable navigation performance. The
“ricklePower Prameters” dialog is shown as
following picture.
To change TricklePower parameters
from 12 pins interface.
Since it is NMEA output default, it needs to change
to SiRF protocol before change TricklePower
parameters. The procedure is described as follows:
(1) Use “Set Serial Port” command of SiRF
NMEA input messages.
$PSRF100,0,9600,8,1,0*0C<CR><LF>
It will switch from NMEA to SiRF protocol.
(2) Use “Set Trickle Power Parameters - Message
I.D. 151” to set the trickle power parameters.
(3) Use “Switch To NMEA Protocol – Message
I.D. 129” to switch back to NMEA protocol.
To upgrade GPS engine board program
(2) Run the SiRFProg.exe.
(3) Select the Target Loader File. Select dltarget.s
for STAR1. Select dlgsp2.bin for STAR2.
(4) Select the Ta rget file that need to be
programmed into flash memory.
(5) Select the COM port. Keep the Baud rate at
4800 for RGM-2101/3000 REB-2101 and
9600 for REB-12R.
(6) If you want to upload program to REB-2101,
please assert the GSP2 check box. But leave it
unasserted for REB-12R.
(7) Click Upload to begin programming flash
memory.
(8) Release the BOOT button.
(9) Now it will run the new program that uploaded