VTI CMA3000 User manual
SCA3000 DEMO KIT
User Manual
VTI Technologies Oy 2/21
www.vti.fi Doc.Nr. 8288400.02 Rev.0.2
TABLE OF CONTENTS
1Introduction .........................................................................................................................3
2Quick start for using the CMA3000 DEMO KIT .................................................................3
3Hardware..............................................................................................................................4
4GUI software........................................................................................................................4
4.1 Resetting GUI and µC..............................................................................................................10
4.2 Uninstalling the GUI and USB driver......................................................................................10
5Advanced data logging.....................................................................................................10
6CMA3000 current consumption measurement with DEMO KIT ....................................12
7USB interface board circuit diagram...............................................................................13
8USB interface board PWB layout.....................................................................................16
9Troubleshooting................................................................................................................17
9.1 Checking and setting correct USB driver Latency timer value...........................................18
9.2 Duplicate serial COM port numbers.......................................................................................20
9.3 Known Issues...........................................................................................................................21
9.3.1 Changing the serial bus type...............................................................................................21
10 Document Revision History .............................................................................................21
11 Contact Information..........................................................................................................21
Downloaded from Elcodis.com electronic components distributor
SCA3000 DEMO KIT
User Manual
VTI Technologies Oy 3/21
www.vti.fi Doc.Nr. 8288400.02 Rev.0.2
1 Introduction
CMA3000 demo demonstrates the CMA3000 component functionality and the component key
properties. This document describes how to install the required software and how to use the
CMA3000 demo board and Graphical User Interface (GUI) software.
CMA3000 demo consists of:
•CMA3000 sensor soldered on chip carrier PWB (see Figure 1 on next page)
•USB interface card (see Figure 1 on next page)
•USB cable
•GUI software running on PC
The CMA3000 DEMO KIT supports digital CMA3000 series sensor, CMA3000-D01. The support
for analog CMA3000-A01 will be added later. The evaluation boards (SCA3000 PWBs) are
compatible with the SCA3000 DEMO KIT.
CMA3000 demo runs on Windows XP and 2000, it requires USB connection for data transfer.
Demo is powered from USB port. The current GUI software does not support Windows Vista. The
CMA3000 demo is based on the same USB hardware PCB as the SCA3000 DEMO KIT, also the
same driver can be used with all demo kits provided by VTI Technologies.
2 Quick start for using the CMA3000 DEMO KIT
Please follow the steps below:
1. Insert CD-ROM
2. Setup the hardware
- Connect the demo kit to PC's USB port
3. Install the USB driver, after the PC has found the device
- When the PC detects the new USB device, do not let Windows to detect the driver,
address the USB driver from folder:
"CD-ROM\CMA3000 demo - Virtual Com Port Drivers\”
- NOTICE, if you have already installed some other demo kit provided by VTI
Technologies, please check that the latency timer parameter is 5 ms. In case the
latency timer value is greater than 5 ms, the CMA3000 DEMO KIT GUI will not
work (more detailed instructions in section 9)
4. Install the GUI software
- Install the GUI software by running the “setup.exe" from folder:
CD-ROM\CMA3000 demo – GUI Installer
- Do not change the installation destination
5. Start the GUI software
- From Start →Programs →CMA3000-USB-DEMO-VER-1.1 →
CMA3000-USB-DEMO-VER-1.1
When using the CMA3000 DEMO KIT with GUI software:
•The DEMO KIT should be connected to PC before the GUI software is started
•Exit the GUI software before unplugging the DEMO KIT from PC
•After GUI software is stopped, the DEMO KIT can be unplugged from PC (DEMO KIT uses
virtual serial port driver, so it can not be found as a USB device).
During software start up, the firewall may alert that the demo software wants a network access.
The demo software can be operated without the network access (granting the network access
won't change the software operation.)
Downloaded from Elcodis.com electronic components distributor
SCA3000 DEMO KIT
User Manual
3 Hardware
The CMA3000 DEMO KIT USB interface board (black PWB) and CMA3000 PWB (green PWB) are
shown in Figure 1. The USB interface card converts the USB interface to SPI or I2C interface.
CMA3000 sensor is soldered on PWB which is connected to interface board.
Figure 1. CMA3000 demo USB interface board and CMA3000 PWB.
Green led: data transfer CMA3000 sensor
Test points for
CMA3000 sensor
Idd measurement
Red led: demo
powered from USB
Demo reset
4 GUI software
CMA3000 DEMO KIT is controlled via USB serial port by GUI software.
The GUI software has four different display modes. The CMA3000 sensor can be set to:
- normal measurement mode,
- normal measurement mode with free fall detection enabled and
- motion detection mode.
The interrupt detected due free fall or motion is indicated by led indicator and sound (if PC sounds
are enabled). Once interrupt is detected, the interrupt has to be cleared by user by pressing the red
led. The led appears on display only when the interrupt is detected.
The four different GUI displays and start up screens are presented below.
VTI Technologies Oy 4/21
www.vti.fi Doc.Nr. 8288400.02 Rev.0.2
Downloaded from Elcodis.com electronic components distributor
SCA3000 DEMO KIT
User Manual
Screen capture of the GUI is presented in Figure 2.
Figure 2. SCA3000 DEMO KIT Graphical User Interface
Table 1. The numbered items in Figure 2.
VTI Technologies Oy 5/21
www.vti.fi Doc.Nr. 8288400.02 Rev.0.2
Item Description
1 Exit software, [Esc]-button also.
2 INT-pin interrupt is displayed as an indicator in this area (Free Fall has to
be selected from pull down menu #13)
3 Resultant acceleration ON / OFF ( ).
4 Save acceleration data in to text file.
5 Freeze image, start / stop the scrolling window, [Page-Up] button also.
6 Open / close the window extension with arrow button (available only in
SCROLL display).
7 Pull down menu for acceleration [g] range (Y-axis).
8 Manual Y-axis range selections (Manual setting has to be selected from
Range pulldown menu)
9 Current acceleration output value decimal display
10 Selected sensor type and GUI software version number.
11 Averaging ON / OFF, number of samples for averaging.
12 Measuring range (G_RANGE bit setting).
13 Pull down menu for CMA3000 operation mode & operation mode
configuration.
14 Pull down menu for GUI display mode.
7.
1.
2.
3. 4.
5.
6.
8.
9.
11.
10.
13.14. 12.
222 zyxRes ++=
Downloaded from Elcodis.com electronic components distributor
SCA3000 DEMO KIT
User Manual
VTI Technologies Oy 6/21
www.vti.fi Doc.Nr. 8288400.02 Rev.0.2
If more than one USB serial port devices
are connected to PC, user must select the
correct USB SERIAL PORT from pop-up
window (Figure 3). If user does not know
the correct USB serial port number, please
disconnect all other USB serial port
devices from PC and restart the GUI
software.
Figure 3. USB serial port selection pop-up window.
User needs to select the correct product
type from PRODUCT SELECTION pop-up
window (Figure 4). CMA3000-D01 is
selected by default.
Figure 4. Product selection pop-up window.
SCROLL, continuously scrolling X, Y, Z
and resultant accelerations, see Figure 5.
Acceleration is presented in [g]. User can:
- change the acceleration scale
- freeze the scrolling image
- change the averaging factor
- set averaging OFF
- save acceleration data into file
- enable/disable resultant scrolling
- select between sensor measurement
ranges 2g/8g
- demonstrate/test CMA3000 motion
detection and free fall modes
Most of the actions/controls listed above
are in the extension part of the window,
which can be accessed by pressing the
arrow button (see Figure 2 and Table 1).
Figure 5. Scroll display.
Downloaded from Elcodis.com electronic components distributor
SCA3000 DEMO KIT
User Manual
VTI Technologies Oy 7/21
www.vti.fi Doc.Nr. 8288400.02 Rev.0.2
MOTION DETECTION, CMA3000 is
set to motion detection with
configuration where operation mode is
changed to normal measurement
mode when motion is detected.
CMA3000 acceleration output is band
pass filtered in motion detection
mode. The transition from motion
detection mode to normal
measurement is presented in Figure
6.
When motion is detected,
the operation mode is
changed automatically to
normal measurement mode
Figure 6. Scroll display with detected motion.
BUBBLE LEVEL, two displays that
show tilt angle, see Figure 7. Angle
calculation is performed in GUI, not in
CMA3000 sensor.
CMA3000 sensor averaging can be
enabled / disabled.
Figure 7. Bubble level display.
Downloaded from Elcodis.com electronic components distributor
SCA3000 DEMO KIT
User Manual
VTI Technologies Oy 8/21
www.vti.fi Doc.Nr. 8288400.02 Rev.0.2
3D demo, a 3 dimensional demo kit virtual
model follows the tilt angles of the real
CMA3000 demo kit, see Figure 8.
Averaging can be adjusted to smoothen
the demo model movements.
Figure 8. 3D demo display.
REGISTER CONFIG display offers user
access in to CMA3000 sensor internal
registers. Registers can be read and
written. The written data format can be
changed between binary and hexadecimal
by pressing the "Bits / Hex" button.
Figure 9. SCA3000 register configuration display.
Downloaded from Elcodis.com electronic components distributor
SCA3000 DEMO KIT
User Manual
SETUP display presents some operational
parameters of selected sensor type, please
refer to component specific documentation
for further information.
The used virtual serial COM port number
can be viewed from "Serial port" display.
This information is needed if the CMA3000
DEMO KIT is used without the GUI
software, see further details from section
5.
In this example the CMA3000 DEMO KIT
uses COM39 serial port.
Figure 10. Setup display.
RESET DEMO initialises the GUI software.
The embedded MCU software version is
presented also. SCROLL display opens
after RESET by default.
Figure 11. Reset demo display.
VTI Technologies Oy 9/21
www.vti.fi Doc.Nr. 8288400.02 Rev.0.2
Downloaded from Elcodis.com electronic components distributor
SCA3000 DEMO KIT
User Manual
4.1 Resetting GUI and µC
CMA3000 DEMO KIT GUI software can be reinitialised by selecting the “Reset demo” display from
pull down menu, see Figure 11.
MCU can be reset by exiting from the GUI and then pressing the reset button (Figure 1) on USB
interface board.
4.2 Uninstalling the GUI and USB driver
The GUI software and the USB driver (FTDI Serial Converter Driver) can be removed from
Windows Control Panel Add/Remove Programs. Please notice that removing the FTDI Serial
Converter Driver (USB driver) may affect on functionality of some other programs (such as other
demo kits provided by VTI Technologies).
5 Advanced data logging
Acceleration data can be saved from GUI software by pressing the “Save to file” button (Figure 2).
Data can be logged also by using the Windows HyperTerminal software and macro language that
is used to control the MCU of the CMA3000 DEMO KIT.
Please notice that GUI software and Windows HyperTerminal software can not be open at the
same time. Follow the steps below to start the data logging:
1. Connect CMA3000 DEMO KIT with USB cable to PC
2. Open GUI software to see the correct COM port number (SETUP display, see Figure 10).
Windows Device Manager can be also used to find out the COM port number.
3. Close the GUI software.
4. Open Windows HyperTerminal software from CD-ROM:
−“CMA3000_demo_HyperTerminal_connection.ht”, or
−see detailed serial communication settings in Table 2.
5. Press demo reset button (see Figure 1). CMA3000 DEMO KIT sends an info text to
HyperTerminal (see Figure 12). If the HyperTerminal software is unable to connect the
CMA3000 DEMO KIT or the info text does not appear,
- Press
disconnect
,
- change the COM port number to correct from port properties ,
- press
connect ,
- press reset button on CMA3000 DEMO KIT.
until info text appears to HyperTerminal screen (see Figure 12).
6. After the info text appears on HyperTerminal, send the wanted macro text file, such as
“CMA3000_data_logger.txt” from CD-ROM (“Transfer” pull down menu →“Send Text
File…” →browse for
CMA3000_data_logger_macro.txt)
7. The text file is a macro that runs in an endless loop. The macro sends 3-axis acceleration
data in hex format to HyperTerminal (see Figure 13). Example of data format:
0x3c,0x01,0x01,Z-Y-X
where “0x” indicates for hex format, and “Z-Y-X” the axis order. The Z-axis hex output is
3C, which is ‘0011 1100’ in binary format.
8. The data can be stored by capturing the data in to file:
“Transfer” pull down menu →“Capture Text…” →save captured data into wanted file and
folder.
9. Data capturing can be stopped from:
“Transfer” pull down menu →“Capture Text…” →“Stop”
Macro language is used to control the CMA3000 DEMO KIT. It can be also used to configure the
CMA3000 sensor. For more detailed information of macro language, please refer to “SCA3000
DEMO KIT macro language description 8259200”.
VTI Technologies Oy 10/21
www.vti.fi Doc.Nr. 8288400.02 Rev.0.2
Downloaded from Elcodis.com electronic components distributor
SCA3000 DEMO KIT
User Manual
VTI Technologies Oy 11/21
www.vti.fi Doc.Nr. 8288400.02 Rev.0.2
If the pre-configured HyperTerminal connection is not available (the CD-ROM), the HyperTerminal
connection can be opened also from:
→Start →Programs →Accessories →Communications →HyperTerminal
The communication settings are presented in Table 2 below
Table 2. CMA3000 DEMO KIT serial communication settings.
Connection properties
2. Connect
1. Select COM port
Figure 12. Windows HyperTerminal with CMA3000 demo info text.
Parameter Value
Bits per second 230400
Data bits 8
Parity None
Stop bits 1
Flow control None
The correct COM port number depends on the PC and used USB port.
Downloaded from Elcodis.com electronic components distributor
SCA3000 DEMO KIT
User Manual
Figure 13. SCA3000 demo output during data logging.
6 CMA3000 current consumption measurement with DEMO KIT
The current consumption of the CMA3000 sensor can be calculated by measuring the voltage drop
over the resistor R34 (470 Ω, 1% tolerance). Voltage drop can be measured from test points TP5
and TP6, see DEMO KIT USB interface board circuit diagram in Figure 16 (PCB design
VTI 29393 rev B0).
The offset current consumption of the DEMO KIT hardware depends on used serial communication
(SPI vs. I2C). The offset current consumption according to serial communication type is presented
in Table 3 below.
Table 3. Offset current consumption of the CMA3000 DEMO KIT HW.
Serial interface Offset current consumption
SPI ~950 µA (Voffset = 444 mV)
I2C ~200 µA (Voffset = 94 mV)
The offset current consumption can also be measured by measuring the voltage drop over the
resistor R34 (TP5 and TP6, see Figure 16) when CMA3000 PWB is not connected to USB
interface board.
SCA3000 current consumption can be calculated
,
470 ⎟
⎟
⎠
⎞
⎜
⎜
⎝
⎛
Ω
−
=offsetdrop VV
Idd (1)
where Vdrop is the measured voltage drop in [V] (from TP5 to TP6, see Figure 16), Voffset is the
measured offset current consumption (from TP5 to TP6, see Figure 16), alternatively the values
from Table 3 can be used. Idd is the CMA3000 current consumption in [A].
The difference in offset current consumption is due the pull up resistor in SCK/SCL line (R2 in
Figure 15). When using SPI-bus, the MCU software drives the SCK/SCL line low when there is no
communication, which results in increase in DEMO KIT offset current consumption (current through
resistor R2 in Figure 15 from DVDD to GND). When I2C is used, the MCU releases the SCK/SCL
line when there is no communication.
VTI Technologies Oy 12/21
www.vti.fi Doc.Nr. 8288400.02 Rev.0.2
Downloaded from Elcodis.com electronic components distributor
SCA3000 DEMO KIT
User Manual
7 USB interface board circuit diagram
CMA3000 demo USB interface board circuit diagram is presented in following pages.
Figure 14. CMA3000 DEMO KIT USB interface board circuit diagram (sheet USB).
VTI Technologies Oy 13/21
www.vti.fi Doc.Nr. 8288400.02 Rev.0.2
Downloaded from Elcodis.com electronic components distributor
SCA3000 DEMO KIT
User Manual
8 USB interface board PWB layout
CMA3000 DEMO KIT USB interface board PWB layout and silkscreen is presented below.
Figure 17. CMA3000 DEMO KIT USB interface board PWB layout.
Figure 18. CMA3000 DEMO KIT USB interface board silkscreen.
VTI Technologies Oy 16/21
www.vti.fi Doc.Nr. 8288400.02 Rev.0.2
Downloaded from Elcodis.com electronic components distributor
SCA3000 DEMO KIT
User Manual
9 Troubleshooting
Due to many PC environments, the interoperability can be limited. The CMA3000 DEMO KIT has
been tested with DELL laptops (Latitude D600, D610, D410) and desktop PCs with Win2000 and
WinXP operating system. If the CMA3000 DEMO KIT does not work properly or its operation is
limited, the following items may help to sort the problems out:
1. Stop the GUI software, press the reset button program on demo USB interface board (see
Figure 1), re-start the GUI again.
2. CMA3000 demo may not work properly if your PC has multiple USB serial port devices
installed. Please remove all other USB serial port devices (including other VTI demos).
3. Close Windows HyperTerminal software, if you have used it.
4. If the GUI interface starts, but data is not scrolling in the window, check that USB driver
LATENCY TIMER parameter is 5ms, please see details in section 9.1
5. Some times other LabView based software do not allow the demo kit GUI software
execution, please try to install the CMA3000 demo kit to another PC or remove other
LabView based software
6. If the PC is unable to find the demo kit serial port, try another USB port. Also, please check
that there are not duplicate serial COM port numbers, more details in section 9.2.
7. The CMA3000 demo kit GUI does not support Windows Vista
8. Test the demo with another USB cable.
9. Please check that does the communication work between the demo kit and the PC:
•Open HyperTerminal connection to the demo (see section 5)
•Press demo reset button (see Figure 1)
•see if the info text appears on the screen (see Figure 12)
→if the info text is transmitted, the communication between the demo kit and PC is ok
VTI Technologies Oy 17/21
www.vti.fi Doc.Nr. 8288400.02 Rev.0.2
Downloaded from Elcodis.com electronic components distributor
SCA3000 DEMO KIT
User Manual
9.1 Checking and setting correct USB driver Latency timer value
The FTDI USB Virtual Serial Com Port driver is delivered with the CMA3000 demo kit and the same
driver version can be also downloaded from VTI's website. This driver is a slightly modified version
of the original FTDI's driver: the driver used with VTI's demos must have a modified Latency timer
setting. If the original FTDI's driver version is used, the demo may not work properly.
In order to modify the driver's Latency timer value, please plug the demo USB cable in to PC and
follow the steps (and screen captures) below:
1. Open control panel and select “SYSTEM”
2. Select “DEVICE MANAGER” from “HARDWARE” tab
3. Select “USB SERIAL PORT” from the list, right mouse click and select
“PROPERTIES"
4. Select “ADVANVED” from the USB Serial port Properties
5. Set the “LATENCY TIMER” to 5 ms (the 16ms default value is too slow for SCA3000
DEMO KIT).
6. Press “OK” to all windows.
7. Restart the GUI software.
Start →Settin
g
s →Control
p
anel
1.
2.
VTI Technologies Oy 18/21
www.vti.fi Doc.Nr. 8288400.02 Rev.0.2
Downloaded from Elcodis.com electronic components distributor
SCA3000 DEMO KIT
User Manual
9.2 Duplicate serial COM port numbers
Some PCs assign duplicate COM port numbers for virtual com port devices. If the PC assigns a
com port number for demo kit that is already reserved by another device, the demo kit will not work
properly (see Figure 19).
COM port numbers can be seen from Computer Management (Device Manager), see section 9.1
for instructions on opening the Device Manager.
PC installs the
demo kit on
same COM port
number as
another device
After changing
the demo to
another USB port
(different slot),
there are no
duplicate COM
port numbers
Figure 19. PC has assigned duplicate COM port numbers for two devices (LEFT), after
changing the USB port there are no duplicate COM port numbers (RIGHT).
VTI Technologies Oy 20/21
www.vti.fi Doc.Nr. 8288400.02 Rev.0.2
Downloaded from Elcodis.com electronic components distributor
Table of contents
Other VTI Motherboard manuals
