VTI SCP1000 Manuale utente

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Doc.Nr. 8268000.03

SCP1000 DEMO KIT

User Manual

SCP1000 DEMO KIT

User Manual

VTI Technologies Oy 2/19

www.vti.fi Doc.Nr. 8268000.03 Rev.0.03

TABLE OF CONTENTS

1Introduction .........................................................................................................................3

2Quick start for using the SCP1000 DEMO KIT ..................................................................3

3Hardware..............................................................................................................................4

4GUI software ........................................................................................................................5

4.1 GUI software displays ...............................................................................................................7

4.1.1 USB serial port selection .......................................................................................................7

4.1.2 Start up and Reset demo ......................................................................................................7

4.1.3 Meas results ..........................................................................................................................8

4.1.4 Register config ......................................................................................................................8

4.1.5 Pres offset adjustment...........................................................................................................9

4.1.6 Setup ...................................................................................................................................10

4.2 Uninstalling the GUI and USB driver......................................................................................10

5Using the SCP1000 demo without the GUI software......................................................11

5.1 Establishing the connection ...................................................................................................11

5.2 Communication commands....................................................................................................12

6Using two SCP1000 demo kits simultaneously ..............................................................14

7USB interface board circuit diagram ...............................................................................15

8USB interface board PCB layout......................................................................................17

9Troubleshooting................................................................................................................18

10 Document Revision History .............................................................................................19

11 Contact Information ..........................................................................................................19

SCP1000 DEMO KIT

User Manual

VTI Technologies Oy 3/19

www.vti.fi Doc.Nr. 8268000.03 Rev.0.03

1 Introduction

The SCP1000 pressure demonstrator is designed to give a quick access and understanding on the

performance and capabilities of the SCP1000 pressure component. This document describes how

to install the required software and how to use the SCP1000 DEMO KIT and Graphical User

Interface (GUI) software version 2.5.

SCP1000 DEMO KIT package includes:

•SCP1000-D01 sensor soldered on chip carrier PCB (see Figure 1 on next page)

•USB interface card inside the demo box (see Figure 1 on next page)

•USB cable

•CD-ROM with documentation, drivers and GUI software running on PC

The SCP1000 DEMO KIT supports SCP1000-D01 and SCP1000-D11 sensors.

The graphical user interface is designed and tested to run in most commercial computers. System

requirements:

•Operating system: Windows XP or Windows 2000 with SP1 or higher

•Communication interface: USB 2.0 or 1.0

The SCP1000 demo is powered from the USB port. For minimizing the noise introduced by the

host PC in pressure measurements, a laptop operating on battery is recommended (mains supply

disconnected).

2 Quick start for using the SCP1000 DEMO KIT

Please follow the steps below:

1. Insert CD-ROM

2. Setup the hardware

- Connect the USB cable to the demo and 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\SCP1000 demo - Virtual Com Port Drivers\

- NOTICE, if you have already installed the SCA3000 demo to your computer, you

do not need to install the USB driver for the SCP1000 demo

4. Install the GUI software

- Install the GUI software by running the “setup.exe" from folder:

CD-ROM\SCP1000 demo - ver 2.5 – Installer

- Do not change the installation destination

5. Start the GUI software

- From Start →Programs →SCP1000-USB-DEMO-VER.2.5

→SCP1000-USB-DEMO-VER.2.5

When using the SCP1000 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 (button in upper right

corner of the GUI)

•After GUI software is stopped, the DEMO KIT can be unplugged from the PC (the SCP1000

DEMO KIT uses virtual serial COM port driver, so it can not be found as a USB device).

SCP1000 DEMO KIT

User Manual

3 Hardware

The SCP1000 DEMO KIT USB interface board and SCP1000 PCB are shown in Figure 1. The

USB interface card converts the USB interface to SPI or TWI interface. The SCP1000 pressure

sensor is soldered on chip carrier PCB which is connected to interface board with board to board

connectors.

The SCP1000 DEMO KIT block diagram is presented in Figure 2 below.

SCP1000 PCB1

with soldered SCP1000-D01

USB interface

board

USB cable

SCP1000 sensor

pin#1 ATST

TRIG

DRDY

CLK

DVDD

DVSS

pin#7 DVDDS

AVSS pin#14

AVDD

CSB

MISO

MOSI

SCK

PD pin#8

SCP1000 sensor

Demo reset

Figure 1. SCP1000 DEMO KIT USB interface board and SCP1000 PCB.

Virtual

serial port

drive

GUI sw

USB cable

USB interface board

SCP1000

PIC

µC

µC_VDD

SPI/TWI

data transfer

AVDD

+3.3V

DVDD

FTDI

UART

FT232BM

Serial data

transfer

Serial data

transfer

Figure 2. SCP1000 USB demo block diagram.

VTI Technologies Oy 4/19

www.vti.fi Doc.Nr. 8268000.03 Rev.0.03

SCP1000 DEMO KIT

User Manual

4 GUI software

SCP1000 DEMO KIT is controlled via USB serial port by GUI software. The software must be

installed into location that is suggested during installation procedure.

Screen capture of the GUI is presented in Figure 3.

Figure 3. SCP1000 DEMO KIT Graphical User Interface.

Table 1. The numbered items in Figure 3.

11.

13. 12. 10. 8.

Item Description

1 Temperature display, [°C].

2 Exit software, [Esc]-button also.

3 Trigger measurement, visible only in low power measurement mode.

4 Scale pressure and temperature displays, press "Reset displays" to apply

the changes.

5 Capture pressure data to file, browse for file name and location, then

press "start data logging". Every data point is saved by default, the

number of saved data points can be reduced.

6 Open / close the window extension with arrow button.

7 Pressure [mbar] and altitude [m] displays.

8 Select units: [mbar], [°C], [m] or [inHg], [F], [ft].

9 Selected sensor type and GUI software version number.

10 Averaging ON / OFF, number of samples for averaging.

11 Reset pressure and altitude displays, and apply new scaling parameters.

12 Pull down menu for SCP1000 measurement mode.

13 Pull down menu for GUI display mode.

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SCP1000 DEMO KIT

User Manual

The SCP1000 GUI software flow chart is presented in Figure 4 below.

Start the GUI sw

VTI Technologies Oy 6/19

www.vti.fi Doc.Nr. 8268000.03 Rev.0.03

Figure 4. SCP1000 GUI sw flow chart.

MCU:

- resets the SCP1000

- detects the sensor type

- detects the serial bus

(SPI/TWI)

- detects the TWI

address if needed

Low noise configuration,

MCU reads the offset

adjustment from the

SCP1000 EEPROM (1

Activate

High resolution

measurement mode

Meas results display;

pressure results are

corrected by values read

from EEPROM (1,2

Back to

Meas results

display

Displays: register

config, pres. offset

adjustment, setup,

reset demo

User changes

display from pull

down menu

NO YES

1) more information on SCP1000 offset adjustment in Figure

9 and in TN48

2) If the pressure offset is not adjusted (the offset difference in

EEPROM is zero), the MCU corrects the SCP1000 output

value with zero value (e.g the SCP1000 raw output data)

SCP1000 DEMO KIT

User Manual

4.1 GUI software displays

The GUI software has four different display modes. All displays are presented below. Displays can

be selected from the "Display" pull down menu (see #12 in Figure 3 and Table 1).

4.1.1 USB serial port selection

If more than one USB serial port devices

(such as SCA3000 or SCP1000 demos)

are connected to PC, user must double

click on the correct USB serial port from

the pop-up window (Figure 5). If user does

not know the correct USB serial port

number, please disconnect all other USB

serial port devices from the PC and restart

the GUI software.

Figure 5. USB serial port selection pop-up window.

4.1.2 Start up and Reset demo

During the GUI software start up or after

selecting "Reset demo" from the "Display"

pull down menu, the MCU inside the

SCP1000 demo detects automatically the

correct sensor type and serial bus

(SPI/TWI). Then the MCU reads the offset

adjustment values from the SCP1000

internal EEPROM. SCP1000 is also

initialised during the start up screen.

The MCU software version as well as

SCP1000 sensor type is displayed in text

field.

Figure 6. Start up screen.

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SCP1000 DEMO KIT

User Manual

VTI Technologies Oy 8/19

www.vti.fi Doc.Nr. 8268000.03 Rev.0.03

4.1.3 Meas results

Meas results is a continuously scrolling

graph for pressure [mbar] and altitude [m]

data, see Figure 7. User can:

- Change the pressure and temperature

scales, press "Reset display" to apply

changes

- Change the averaging factor

- Set averaging ON/OFF. When

averaging is OFF, the raw SCP1000

data is displayed

- Capture the pressure, altitude and

temperature data in to file. The data is

saved with the same averaging factor

as it is displayed on the screen. By

default every data point that is

displayed on the screen are saved.

Optionally user can save for example

only every 10th data point displayed on

the scrolling graph.

- Select the between the following units:

Figure 7. Meas results display. [mbar], [°C], [m] or

[inHg], [F], [ft]

Some of the actions/controls listed above can be found from the extension part of the window,

which can be accessed by pressing the arrow button (see Figure 3 and Table 1).

The "Trig measurement" button is displayed in the extension part of the window only when the

SCP1000 is in low power measurement mode.

The Table 5 information

is presented is this

display also 4.1.4 Register config

in to SCP1000 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.

Information of the selected register is

displayed below the "Register address" pull

down menu.

Please refer to the Table 5 and to the

document "SCP1000 Product Family

Specification 8260800" for more detailed

information on SCP1000 registers.

Figure 8. Register config display.

SCP1000 DEMO KIT

User Manual

VTI Technologies Oy 9/19

www.vti.fi Doc.Nr. 8268000.03 Rev.0.03

4.1.5 Pres offset adjustment

In pressure offset adjustment display user

can adjust the absolute pressure offset

value of the SCP1000. The MCU inside the

demo box can read and write the pressure

offset adjustment of the SCP1000 by using

the SCP1000 internal EEPROM registers'

USERDATA1 (0x29) and USERDATA

(0x2A). The offset adjustment is performed

in high resolution measurement mode.

After SCP1000 offset is adjusted in this

display, user can verify the calibration

results in MEAS RESULTS display.

In offset adjustment display user can:

Figure 9. Pressure offset adjustment display.

- Program the SCP1000 offset adjustment in to the SCP1000 internal EEPROM registers

USERADATA1 and USERDATA2 ("Start offset adjustment" button)

- Read the current SCP1000 offset adjustment data from the two EEPROM registers ("Read

current adjustment data" button)

- Reset the SCP1000 offset adjustment data by writing zeros in to two EEPROM registers ("Zero

offset adjustment data" button)

Please refer to the following documents:

- "TN48 SCP1000 Pressure Offset Adjustment" for more detailed information on offset zeroing

and offset adjustment bit level presentation that is used in this demo

- "SCP1000 Product Family Specification 8260800" for more detailed information SCP1000

EEPROM register reading/writing

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