ST STEVAL-IFS001V1 Manual de usuario

April 2006 Rev 1 1/14

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 (Micro-

Electro-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.

MEMS can be used in a variety of vibration sensor and intelligent movement estimator

situations, for example:

■Vibration analysis

– Motor control

– High buildings

■Control of position

– Stability system for caravans

– Stability for cable cars

■Sport

– Sport shoes

– Speedometers

■Automotive

–Blackbox

– 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)

www.st.com

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Contents STEVAL-IFS001V1

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Contents

1 Overview of MEMS evaluation boards . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

3 I2C and SPI use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3.1 I2C and SPI connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3.2 Recommendations for I2C use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3.3 Recommendations for SPI use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

4 uPSD software use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

4.1 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

5 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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STEVAL-IFS001V1 Overview of MEMS evaluation boards

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1 Overview of MEMS evaluation boards

Figure 1. STEVAL-IFS001V1

This consists of DK3420 and ST-MEMS-XX-EVAL

Figure 2. DK3420 - USB Demonstration board with µPSD Turbo Plus

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 STEVAL-IFS001V1

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Figure 3. ST-MEMS-DQ-EVAL

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.

For a pin description, see Section 2. Additionally, a description of I2C and SPI use is

provided in Section 3.

Additionally, for further information on this module, refer to the user manual UM0152 “MEMS

Module STMEMSDQ-EVAL1 Dedicated to uPSD Evaluation Kit DK34XX”.

Features include:

●LIS3LV02DQ (QFN28)

●I2C or SPI

●3x buttons

●3x LEDs

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STEVAL-IFS001V1 Overview of MEMS evaluation boards

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Figure 4. ST-MEMS-AQ-EVAL (check for availability)

Components include:

●LIS3L02AQ (QFN44)

●3x analog outputs

●3x buttons

●3x LEDs

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Pin description STEVAL-IFS001V1

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2 Pin description

Legend:

●AINx - Analog input x

●SPC - SPI clock

●SDI - SPI data input (view from uPSD)

●SDO - SPI data output (view from uPSD)

●CS - SPI chip select

●UART0out - UART data out

●UART0in - UART data in

●SDA - I2C data

●SCL - I2C clock

Table 1. DK3420 - USB demonstration board with µPSD Turbo Plus and ST-MEMS-

DQ-EVAL

H1 5V PB0 PB2 PB4 PB6

LED6 RESET 3.3V

P1.5

Ain5

BUT5

P1.3

Ain3

P1.1

Ain1

H10 GND PB1 PB3 PB5

LED5

PB7

LED7

P1.6

Ain6

BUT6

P1.7

Ain7

BUT7

P1.4

Ain4

P1.2

Ain2

P1.0

Ain0

H3 PC2 P4.6

SDO

P4.4

SPC P4.2 P4.0 P3.3

P3.1

UART0

out

P3.5 P3.7

SCL GND

H30 GND P4.7

P4.5

SDI P4.3 P4.1

P3.0

UART0

P3.2 P3.4 P3.6

SDA GND

H1 & H10 connections

H3 & H30 connections

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STEVAL-IFS001V1 I2C and SPI use

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3 I2C and SPI use

Figure 5. Board schematics for ST-MEMS-DQ-EVAL

3.1 I2C and SPI connections

D D

C C

B B

A A

3V33V3

GNDGND

3V3 3V3

P17

3V3

GNDPB5

3V3

PB6PB7

P16 P152V4

GND

3V3

SDA_SDI

SCL_SPC

PB0

VUSB

PB2

PB4 CK

RSTn

PB6 PB6

Ai5 P15

V3.3 3V3

Ai3

Ai1

P4.6 SDA_SDI

P3.5

P4.2

P3.7 SCL_SPC

PC2

P3.1

P4.0

P4.4 SCL_SPC

GND GND

P3.3

P4.3

GNDGND

GNDGND GNDGND

P4.5SDO

P3.0

P4.1

P4.7CS

SDA_SDISDA_SDI P3.6SDA_SDI

P3.4

P3.2RDYINT

PB1

Ai0

PB7PB7

Ai4

Ai2

Ai6P16

GNDGND

PB5PB5

Ai7P17

PB3

GND

GND GND

2V4

2V4 2V4

RDYINT

SDO

SDA_SDI

SCL_SPC

GNDGND

2V43V3

2V4

GND

3V3 2V42V4

Title

Size Document Number Rev

Date: Sheet of

STEVAL-IFS001V1 0.1

Digital MEMS module

11Friday, March 03, 2006

Title

Size Document Number Rev

Date: Sheet of

STEVAL-IFS001V1 0.1

Digital MEMS module

11Friday, March 03, 2006

Title

Size Document Number Rev

Date: Sheet of

STEVAL-IFS001V1 0.1

Digital MEMS module

11Friday, March 03, 2006

R15

10k

R15

10k

R34

4k7

R34

4k7

R27

330

R27

330

CON10

H30

CON10

H30

CON10

B5B5

100nF

R17

10k

R17

10k

GND

VDD

reserved

GND

RDY/INT

SDO

SDA/SDI/SDO

VDD_IO

SCL/SPC

NC 15

CK 16

GND 17

reserved 18

VDD 19

reserved 20

NC 21

NC 22

NC 23

NC 24

NC 25

NC 26

NC 27

NC 28

LIS3LV02DQ

R25

330

R25

330

R16

10k

R16

10k

H10

CON10

H10

CON10

R36

4k7

R36

4k7

CON10

100nF

L6L6

R37

4k7

R37

4k7

L7L7

R35

B7B7

B6B6

100nF

L5L5

R26

330

R26

330

Vin

Vout

GND

LE25

U11 LE25_TO92

LE25

U11 LE25_TO92

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

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3.2 Recommendations for I2C use

●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 pull-

up 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

–EnableI

2C on your micro and start the communication

3.3 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 pull-

up 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 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

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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

The program is running, this led is toggled in main.

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.

●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

4.3 Selection of operation mode

During the initialization an operation mode can be selected by pressing buttons:

●no button is pressed

On-line measurement (default)

●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.

Note: Press the button first and then plug the module into the USB.

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uPSD software use STEVAL-IFS001V1

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4.4 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.

●no button is pressed

No effect.

●BUT5 is pressed

Pause/Stop measurement.

●BUT6 is pressed

Start measurement, LED5 blinks to indicate data is being read and stored (it stops

automatically when the Flash is full).

●BUT7 is pressed

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.

4.6 Read out data from Flash

Ready to start sending data stored in Flash via USB. Normally LED7 is blinking.

●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

Off-line measure time @40Hz @160Hz

128KB (uPSD3433) 576s 136s

256KB (uPSD3434) 1092s 273s

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