Download STEVAL-IFS001V1 evaluation kit with MEMS

UM0223
User manual
STEVAL-IFS001V1 evaluation kit with MEMS
Introduction
This user manual gives an overview of the use of STEVAL-IFS001V1 kit with MEMS (MicroElectro-Mechanical System) evaluation board.
As shown in the next section, this evaluation board consists of the DK3420 (uPSD
evaluation board) and the ST-MEMS-xx-EVAL (MEMS evaluation module). When connected
together as an evaluation kit, MEMS applications can be evaluated and measured through a
USB connection to a PC. A brief introduction to the MEMS software, MEMS USB Reader
7.x, is also provided.
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MEMS can be used in a variety of vibration sensor and intelligent movement estimator
situations, for example:
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Vibration analysis
– Motor control
– High buildings
■
Control of position
– Stability system for caravans
– Stability for cable cars
■
Sport
– Sport shoes
– Speedometers
■
Automotive
– Black box
– Intelligent driver sensors
– Car alarms
■
Navigation
– Dead-reckoning for GPS
■
Logistics
– Blackbox for containers (sensoring)
■
Robotics
– Control of robot arms (welding robots)
■
Security
– Vibration detection (broken window alarm)
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April 2006
Rev 1
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Contents
STEVAL-IFS001V1
Contents
1
Overview of MEMS evaluation boards . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2
Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3
I2C and SPI use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4
3.1
I2C and SPI connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.2
Recommendations for I2C use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.3
Recommendations for SPI use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
5
uPSD software use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Digital or analog module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.2
LED signalization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.3
Selection of operation mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.4
On-line measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.5
Off-line measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.6
Read out data from Flash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
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MEMS software - MEMS_USB_Reader_7x . . . . . . . . . . . . . . . . . . . . . . 12
5.1
Initial window and features overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5.2
MEMS values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5.3
Butterworth filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5.4
FFT analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
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4.1
STEVAL-IFS001V1
1
Overview of MEMS evaluation boards
Overview of MEMS evaluation boards
Figure 1.
STEVAL-IFS001V1
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This consists of DK3420 and ST-MEMS-XX-EVAL
Figure 2.
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DK3420 - USB Demonstration board with µPSD Turbo Plus
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For a pin description, see Section 2. Further information is available in the uPSD34xx
datasheet and online, from http://www.st.com
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Overview of MEMS evaluation boards
Figure 3.
STEVAL-IFS001V1
ST-MEMS-DQ-EVAL
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The MEMS module ST-MEMS-DQ-EVAL is designed for the evaluation of a MEMS
application which can be used in a variety of vibration sensor and intelligent movement
estimator situations.
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For a pin description, see Section 2. Additionally, a description of I2C and SPI use is
provided in Section 3.
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Additionally, for further information on this module, refer to the user manual UM0152 “MEMS
Module STMEMSDQ-EVAL1 Dedicated to uPSD Evaluation Kit DK34XX”.
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Features include:
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LIS3LV02DQ (QFN28)
I2C or SPI
●
3x buttons
●
3x LEDs
STEVAL-IFS001V1
Figure 4.
Overview of MEMS evaluation boards
ST-MEMS-AQ-EVAL (check for availability)
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Components include:
●
LIS3L02AQ (QFN44)
●
3x analog outputs
●
3x buttons
●
3x LEDs
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Pin description
2
STEVAL-IFS001V1
Pin description
Table 1.
DK3420 - USB demonstration board with µPSD Turbo Plus and ST-MEMSDQ-EVAL
H1
5V
H10
GND
PB0
PB2
PB1
PB3
PB6
LED6
PB4
PB5
LED5
PB7
LED7
RESET
P1.6
Ain6
BUT6
3.3V
P1.7
Ain7
BUT7
P1.5
Ain5
BUT5
P1.4
Ain4
P1.3
Ain3
P1.2
Ain2
P1.1
Ain1
P1.0
Ain0
H1 & H10 connections
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H3 & H30 connections
H3
H30
PC2
P4.6
SDO
P4.4
SPC
P4.7
CS
GND
Legend:
P4.5
SDI
SPC - SPI clock
●
SDI - SPI data input (view from uPSD)
●
SDO - SPI data output (view from uPSD)
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AINx - Analog input x
CS - SPI chip select
UART0out - UART data out
UART0in - UART data in
SDA - I2C data
SCL - I2C clock
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P3.3
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P4.1
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P4.3
P4.0
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P3.1
UART0
out
P3.0
UART0 P3.2
in
P3.5
P3.4
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P3.7
SCL
P3.6
SDA
GND
GND
STEVAL-IFS001V1
I2C and SPI use
I2C and SPI use
Board schematics for ST-MEMS-DQ-EVAL
5
4
3
RDYINT
SDA_SDI
GND
1
2
3
4
5
6
7
8
9
10
PC2
P4.6
P4.4
P4.2
P4.0
P3.3
P3.1
P3.5
P3.7
GND
SDA_SDI
SCL_SPC
1
H10 H1
U8
LIS3LV02DQ
GND
GND
PB1
PB3
PB5
PB7
Ai6
Ai7
Ai4
Ai2
Ai0
NC
NC
NC
NC
NC
NC
NC
1
2
3
4
5
6
7
8
9
10
GND
2V4
SCL_SPC
GND
GND
RDYINT
1
2
3
4
5
6
7
NC
GND
VDD
reserved
GND
RDY/INT
NC
NC
reserved
VDD
reserved
GND
CK
NC
NC
SDO
SDA/SDI/SDO
VDD_IO
SCL/SPC
CS
NC
D
GND
P4.7
P4.5
P4.3
P4.1
P3.0
P3.2
P3.4
P3.6
GND
28
27
26
25
24
23
22
H30 H3
GND
CS
SDO
2
2V4
GND
CK
C
1
2
3
4
5
6
7
8
9
10
VUSB
PB0
PB2
PB4
PB6
RSTn
V3.3
Ai5
Ai3
Ai1
1
2
3
4
5
6
7
8
9
10
D
CK
PB6
3V3
P15
CON10 CON10
8
SDO
9
SDA_SDI 10
2V4
11
SCL_SPC12
CS
13
14
CON10 CON10
21
20
19
18
17
16
15
PB5
PB7
P16
P17
LE25_TO92
U11
LE25
3V3
3 Vin
C2
100nF
C
Vout 1
2V4
GND
Figure 5.
C3
100nF
2
3
R35
3V3
2V4
GND
0
3V3
R34
4k7
3V3
R25
330
L7
L6
L5
2V4
C1
100nF
3V3
R17
10k
P17
C4
100nF
Pr
PB5
GND
A
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PB6
P15
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B6
GND
PB7
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P16
B7
GND
GND
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B
3V3
R16
10k
R15
10k
1
3V3
R26
330
1
2V4
3V3
R27
330
B5
GND
2
3V3
1
R36
4k7
SCL_SPC
SDA_SDI
CS
2
R37
4k7
B
A
Digital MEMS module
Size
A
Date:
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Document Number
STEVAL-IFS001V1
Friday, March 03, 2006
2
Rev
0.1
Sheet
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3.1
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Signal (on MEMS)
I2C (on uPSD)
SPI (on uPSD)
SCL_SPC
P3.7
P4.4
SDO
NC
P4.5
SDA_SDI
P3.6
P4.6
CS
NC
P4.7
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I2C and SPI use
STEVAL-IFS001V1
Recommendations for I2C use
3.2
3.3
●
With I2C, the use of R36 & R37 pull-up resistors (4k7) is advised
●
The use of resistor R34 (10k) is not normally necessary as uPSD has an internal pullup of around 100k.
●
Because SCL_SPC and SDA_SDI are used for I2C and SPI together, care should be
taken with the following instructions:
–
First (important), disable SPI and set the SPI pins as floating inputs
–
Set P4.7 (CS) as GPIO output and write ‘1’ to activate I2C on the MEMS chip
–
Enable I2C on your micro and start the communication
Recommendations for SPI use
●
With SPI, the use of resistors R36, R37 is NOT advised
●
The use of resistor R34 (10k) is not normally necessary as uPSD has an internal pullup of around 100k.
●
Because SCL_SPC and SDA_SDI are used for I2C and SPI together, care should be
taken with the following instructions:
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First (important), disable I2C and set the I2C pins as floating inputs
–
Activate your SPI. P4.7 is a part of SPI and should be ‘0’, otherwise set P4.7 (CS)
as GPIO output and write ‘0’ directly. This instructs the MEMS chip to use SPI
–
Start the communication
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STEVAL-IFS001V1
uPSD software use
4
uPSD software use
4.1
Digital or analog module
The program automatically detects whether a module is digital or analog.
The recognition is based on the value on pin P3.3. A digital module has this pin
unconnected which is the same as logic ‘1’ because of an internal uPSD pull-up. Analog
modules must employ a pull-down resistor to enable the detection of logic ‘0’.
4.2
LED signalization
●
LED5 (green) blinking
Data is being read. Digital modules are using I2C, analog modules are using ADC.
●
LED6 (yellow) blinking
This indicates USB communication, data is being sent.
●
LED7 (red) blinking
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The program is running, this led is toggled in main.
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Immediately after the module is plugged in, all LEDs are lit while initialization is in process.
When uPSD, the peripherals (I2C,ADC, etc) and MEMS are initialized, the LEDs are turned
off. Immediately following this, the main starts and LED7 blinks.
●
4.3
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If LED7 doesn't start blinking, the initialization will have failed.
a)
Check hardware
b)
Try to restart the PC
c)
Re-program uPSD
d)
If still not working, contact support
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Selection of operation mode
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During the initialization an operation mode can be selected by pressing buttons:
●
no button is pressed
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On-line measurement (default)
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Note:
●
●
BUT5 is pressed
Off-line measurement (it erases the Flash for new measurements which takes around
5s for the 256KB flash)
BUT6 is pressed
Read out data from Flash (useful after the off-line measurement)
BUT7 is pressed
No effect.
Press the button first and then plug the module into the USB.
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uPSD software use
4.4
STEVAL-IFS001V1
On-line measurement
During on-line measurement, data is read from MEMS and sent via USB to the PC.
Logically, all three LEDs should blink. In this mode, the buttons have the following meanings:
●
no button is pressed
uPSD sends data from MEMS to the PC (a packet with MEMS data)
●
BUT5 is pressed
No effect.
●
BUT6 is pressed
No effect.
●
BUT7 is pressed
In the case of digital MEMS, uPSD reads its registers and sends this information via
USB (a packet with registers)
4.5
Off-line measurement
Ready to start the measurement. Normally LED7 blinks.
●
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no button is pressed
No effect.
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BUT5 is pressed
Pause/Stop measurement.
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BUT6 is pressed
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Start measurement, LED5 blinks to indicate data is being read and stored (it stops
automatically when the Flash is full).
●
BUT7 is pressed
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If measurements have not started, the sample frequency can be changed. Possible
frequencies are 40 or 160 Hz. The selection is indicated by the LED7 blinking speed.
Off-line measure time
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(t s)
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256KB (uPSD3434)
4.6
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@40Hz
@160Hz
576s
136s
1092s
273s
Read out data from Flash
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Ready to start sending data stored in Flash via USB. Normally LED7 is blinking.
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●
●
no button is pressed
No effect
BUT5 is pressed
Start sending data. uPSD sends data from Flash and LED6 blinks (a packet with
MEMS data). It reads the entire Flash. Any part which doesn't contain relevant MEMS
data you will get 0xFF. After the end of the Flash range, 0xFF will also be sent. 0xFF
STEVAL-IFS001V1
uPSD software use
values translate as <-1,-1,-1> readings on the PC MEMS USB Reader, which should
be considered to detect both false readings and end of Flash data.
●
BUT6 is pressed
No effect.
●
BUT7 is pressed
No effect.
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MEMS software - MEMS_USB_Reader_7x
STEVAL-IFS001V1
5
MEMS software - MEMS_USB_Reader_7x
5.1
Initial window and features overview
Figure 6.
Screenshot of initial screen of MEMS USB Reader 7.1
Main features available in the MEMS USB Reader include:
5.2
●
MEMS values in time graph
●
Butterworth filters
●
FFT analysis
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MEMS values
Figure 7.
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Screenshot showing MEMS values in time graph
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Paste from clipboard into Excel
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Copy data
to clipboard
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STEVAL-IFS001V1
MEMS software - MEMS_USB_Reader_7x
Use the MEMS Values screen to:
5.3
●
Copy data into the Excel directly via clipboard
●
Copy the graphic figure (graph) as a metafile via clipboard
●
Save data into a CSV file
Butterworth filters
Figure 8.
Screenshot of the filtering window with Butterworth filter options
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Filtering options include:
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Butterworth low-pass & hi-pass filters order 1-4
●
Butterworth band pass filter order 1
●
It's possible to hide the axis (currently, only the Y-Axis is shown)
FFT analysis
Figure 9.
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Screenshot of FFT analysis
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FFT (Fast Fourier Transform) analysis features and options include:
●
FFT for 16, 32, 64, 128 samples
●
Allows FFT zoom (filling with zeros)
●
Allows to change FFT overlap
●
Copy of the figure to clipboard as a metafile
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STEVAL-IFS001V1
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Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the
right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any
time, without notice.
All ST products are sold pursuant to ST’s terms and conditions of sale.
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Purchasers are solely responsible for the choice, selection and use of the ST products and services described herein, and ST assumes no
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UNLESS OTHERWISE SET FORTH IN ST’S TERMS AND CONDITIONS OF SALE ST DISCLAIMS ANY EXPRESS OR IMPLIED
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SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE.
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Resale of ST products with provisions different from the statements and/or technical features set forth in this document shall immediately void
any warranty granted by ST for the ST product or service described herein and shall not create or extend in any manner whatsoever, any
liability of ST.
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ST and the ST logo are trademarks or registered trademarks of ST in various countries.
Information in this document supersedes and replaces all information previously supplied.
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