Digitax 4GMCU User manual

4GMCU
Technical Manual
V 1.3

The information contained here are property of DIGITAX Automotive Electronics Italy, and
extremely confidential. Any disclosure, copying, distribution to third party is strictly
prohibited.
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Contents
General concepts & architecture...................................................................................................................... 5
Main Features..................................................................................................................................................... 5
Block Diagram..................................................................................................................................................... 8
Regular and Alternative Boot ............................................................................................................................. 9
Appearance.................................................................................................................................................... 10
Technical Views ................................................................................................................................................ 11
4GMCU......................................................................................................................................................... 11
M2 Display ................................................................................................................................................... 12
Connectors and Cables................................................................................................................................... 13
I/O Power Connector........................................................................................................................................ 13
User and Demo Software ............................................................................................................................... 14
Updates, Backup and Restore .......................................................................................................................... 14
The Update folder ........................................................................................................................................ 14
System Update ............................................................................................................................................. 15
Automatic Restore ....................................................................................................................................... 15
User procedures ........................................................................................................................................... 15
Autorun for SD Card and USB drives ............................................................................................................ 16
Power management and Stealth Mode............................................................................................................ 17
4GMCU Power On ........................................................................................................................................ 17
4GMCU Power Off........................................................................................................................................ 17
On board peripheral power .......................................................................................................................... 18
Odometer and OverSpeed................................................................................................................................ 19
Tips for the programmer .................................................................................................................................. 19
Embedded taximeter........................................................................................................................................ 21
Driver Logon and Authentication ................................................................................................................. 21
Infrared Passenger Sensor............................................................................................................................ 22
Serial Ports Digital and Analog I/O ................................................................................................................. 23
Special Purpose Digital and Analog I/O (A.I.T.P.).............................................................................................. 23
Power ON/OFF using special input 3 ................................................................................................................ 23
4GMCU with Embedded F16 Taximeter and peripheral configuration............................................................ 24
Sample Applications ......................................................................................................................................... 25
AUTORUN application.................................................................................................................................. 25
AITP application ........................................................................................................................................... 26
GPS ............................................................................................................................................................... 29
CamView ...................................................................................................................................................... 29
VoiceCall....................................................................................................................................................... 30
SaveReg........................................................................................................................................................ 31
SysUtils ......................................................................................................................................................... 31
Test............................................................................................................................................................... 33
M16Flasher .................................................................................................................................................. 33
4GMCU .NET libraries..................................................................................................................................... 34
Aitp.Wrapper41................................................................................................................................................ 34
ComTax2.Wrapper41........................................................................................................................................ 34

The information contained here are property of DIGITAX Automotive Electronics Italy, and extremely confidential. Any disclosure, copying, distribution to third
party is strictly prohibited.
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DigitalIO.Wrapper41......................................................................................................................................... 34
Digitax.Mobile.Modem..................................................................................................................................... 35
Digitax.Mobile.RAS ........................................................................................................................................... 35
Digitax.Mobile.RAS.Link.................................................................................................................................... 35
GPS.Wrapper41 ................................................................................................................................................ 36
Source Code Examples...................................................................................................................................... 37
Modem-RAS sample application .................................................................................................................. 37
ComTax2 (Taximeter) ................................................................................................................................... 41
AITP (Odometer)........................................................................................................................................... 43
AITP (Version and information).................................................................................................................... 44
AITP (Light Dimmer) ..................................................................................................................................... 45
Digital I/O (IPreShut).................................................................................................................................... 47
GPS ............................................................................................................................................................... 48
Communication Protocol A.I.T.P. ................................................................................................................... 50
Standard Basic structure and operating principle ............................................................................................ 51
Packet ............................................................................................................................................................... 52
Character set .................................................................................................................................................... 52
Device Id ........................................................................................................................................................... 53
ASCII coding ...................................................................................................................................................... 53
Handshake ........................................................................................................................................................ 54
LRC.................................................................................................................................................................... 55
Pack Number .................................................................................................................................................... 56
Implementation for 4GMCU A.I.T.P. processor................................................................................................ 56
Special In/Out............................................................................................................................................... 56
Digital I/O programming.............................................................................................................................. 57
Analog I/O .................................................................................................................................................... 58
Windows Shut Down .................................................................................................................................... 58
Windows Restart and Watchdog ................................................................................................................. 58
Windows is Started ...................................................................................................................................... 59
Power Supply................................................................................................................................................ 59
Odometer ..................................................................................................................................................... 60
M16 Flasher (Embedded taximeter Boot Mode).......................................................................................... 61
Temperature and Fan control ...................................................................................................................... 61
Setup Parameters Read / Write ................................................................................................................... 61
”Stealth” Mode and ”Wake Up On Ring” ..................................................................................................... 61
Firmware Version and Country Code............................................................................................................ 62

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General concepts & architecture
Main Features
Feature
Description
Display
Separate CPU Unit and LCD Display
Viewing area 7" diagonal
Aspect Ratio 16:9
WVGA 800x480 Resolution
Colour TFT LED Display
Display clearly viewable with 350 cd/m2
Ambient Light Sensor with 32 Steps Automatic Regolation
Touchscreen
Full Automotive Rugged Touchscreen with configurable touch areas.
Extended Temperature Range
Finger Type
CPUs
Primary CPU VIAC7 x86 500MHz up to 1.5 GHz
CX700 Companion Chipset
Additional processing power for 3D graphics, multimedia, and streaming functions
Secondary RISC CPU for Automotive Intensive Tasks
Automatic and Programmable Fan control with Internal Temperature Sensor and
PWM Driver
Ram Memory
256MB up to 1GB RAM Memory
Storage Memory
256 MB up to 4 GB capacity of Internal Flash Memory
128 MB Protected Hidden Disk (Soldered Flash Disk, available with WinCE version)
Bootable
SDHC (High Capacity compatible) socket
GPRS Modem
GSM / GPRS Class 12
Modem can be powered on when the terminal is off.
Wake-up on ring programmable features
Board to Board connector pin to pin compatible with "GPRS (base)" "EDGE
(option)" and "UMTS (option)" retrofit upgradable
Warm reset and cold reset (dedicated electronic circuit) available through API
calls
2 Hardware RS232 Serial Ports available on the modem (Hardware MUX) allow
both RAS and AT command from user applications
2 Sim Card slots with Software switcher available through API calls
Support international standard protocol (ETSI AT command set)
Supports RAS (Remote Access Service) dialup function
GPS / GPRS Rugged Combo antenna (option)
GPS Receiver
Ublox 5 SuperSense Technology and Indoor Navigation, new generation GPS
chipsets with improved precision and fast acquisition of position fix on start up
and sleep mode
50 Channels, 1 Million correlators, GALILEO Compatible
Antenna Monitor (Disconnection and Short Circuit Detection / Protection)
Hot / Warm / Cold start time –1 / 29 / 29 sec.
Supports international NMEA standard format and proprietary UBX Binary
protocol
Messages interval up to 4 Hz Frequency
Warm reset and cold reset (dedicated electronic circuit) available through API
calls
Assisted GPS (A-GPS) available
Dead Reckoning System (GPS + Gyroscope + Odometer) with EKF (Enhanced
Kalmann Filter) (option)
GPS / GPRS Rugged Combo antenna (option)
Wireless Connections
Built-in Bluetooth EZURIO Bism2 (option)
Class 1 Bluetooth version 2.0

The information contained here are property of DIGITAX Automotive Electronics Italy, and extremely confidential. Any disclosure, copying, distribution to third
party is strictly prohibited.
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Range in excess of 300 metres and Data transfer rate up to 300 kbps
Hardware Keys
6 Lighted and Software programmable Hardware Buttons
Power on key
1 Power On/Off button
USB Ports
2 USB Host (with USB Support for Mouse and Keyboard)
Serial Ports
4 Internal RS232 Serial Ports
4 RS232 Serial Ports Available through External DerivBox (option)
2 RS232 Serial Ports available on embedded meter to connect 2G IU, Printer and
Smart Roof sign (Option)
I/O ports connection
5 Digital Inputs
2 Analog Inputs
4 Power Output Ports
Dedicated Ignition input
Dedicated Emergency Switch input
1 PS2 Keyboard Connector
LAN Connectivity for debug and development (option)
Video Grabber RGB Composite Input Port
Alarm and Security
Panic Button input
Stealth Mode Controller (system ON display, audio and lightings off)
Stealth Display Feature
Fully Programmable Stealth display mode, Screen saver mode and sleeping mode
by:
oPower Button
oHardware Key
oAPI
Enable Switching Off LCD without powering down MDT unit
Multimedia
Speaker and Microphone
Supports wave speaker volume control
API to be provided
Playback wave and speech files
Boot
Triple Boot Manager (Flash Disk, SDHC Card, Hidden Protected Disk) with
FileSystem Integrity Check, OTA Application update, Peripheral GPS and GPRS
Power Management
Boot Time 35 sec
Customizable Boot Up Splash Screen with End-User Logo
Soft/Hard Reset
Soft Reset available through HW switch
Soft Reset available by API calls
Hard Reset available by Hidden Protected Disk or SDHC Card
Safe Windows shutdown
procedure
Preshutdown notification
Disk Activity Signal Control
On-Board UPS
Operating System
Windows CE .NET 5.0 with ATL, MFC, .NET Compact Framework 3.5 and Digitax
Framework 4.1
Development Tools
ActiveSync 4.5 (last version available) and USB debugging with ActiveSync support
SDK for Embedded Visual C++ 4.0 (EVC4)
Sample code for SDK in C++
Compact Framework 3.5 supported
Digitax Framework 4.1 (Digitax Libraries): GPS, GPRS, VoiceCall, I/O, Odometer,
Taximeter, Hardware Keys, WatchDog, OTA, Windows Status, Stealth Mode
Controller, Logs, Backup And Restore, Light Dimmer, Hardware Identification,
Splash Screen, Alarm, Card Reader and Windows Status
Serial port driver and test tools
Digital I/O driver, API (DLL) and test tool
Read/Write Windows CE registry application and API to Supports permanent
saving of system settings into registry

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Software controllable Warm Restart and test tool
GPRS modem driver and test tool
GPS driver and test tool
Speaker and MIC test tool, wave playback and voice recorder
Contactless / NFC reader driver and test tool
Backlight control API and test tools
Ping tool
Dialup network
GSM phone dialer
Support network protocol TCP/UDP, IP, PPP
Virtual keypad
Text file editor
Explorer
Text-To-Speech
Support 3rd party Native Text-To-Speech
Software Navigation
Support 3rd party map application and navigation software with SDK
System diagnostic tools
On Field Test (OFT) OnBoard Diagnostic Utilities included, with Customizable
CheckList to make tests of GPS Fix, GPS Antenna, GPRS Connectivity and Base
Station Signal Quality, Odometer, Ignition, Panic Button, TouchScreen calibration,
Hardware Keys, Ambient Light Sensor, Device version, OS Version, AITP Version,
Taximeter, UPS and Battery Status, Roof Light, Navigation Software
All On Field Tests and enrolling features can be used during first installation and
swap of devices.
OS Image Loader
Over The Air (OTA) OS image loader or microSDHC Card Image Loader
System Update Fleet
Management
Professional OTA (Over The Air) Client allows the update of the whole Operating
System and all the CPUs Firmware (option).
Professional OTA (Over The Air) Server with vehicles enrolling, group management
and selective update, remote debugging and logging. Web based user interface
(option)
Taximeter
Embedded Taximeter (Full Firmware and TARIF OTA Programmable)
Power Supply
8 - 32 V with Surge Protector
Battery
On-Board UPS with External Battery Package, Standard Battery Pack 30 minutes
Mounting
All the External Connectors, Accessible slots (such as SIM Card, microSDHC, USB,
etc.) and Screws are Sealed
Operating Temperature
-20°C to 70°C
Humidity
Humidity up to 95% non-condensing
Vibration
Vibration Sine wave, 10 ~ 500 ~ 10Hz, 1.5G, 0.37oct/min 3 axis, 1hour/axis
Sealing
All connectors covers sealed
Dimension
159 mm x 110 mm x 47 mm (H x W x D)
Weight
1.500 g

The information contained here are property of DIGITAX Automotive Electronics Italy, and extremely confidential. Any disclosure, copying, distribution to third
party is strictly prohibited.
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Block Diagram

9
Regular and Alternative Boot
Sometimes it’s necessary to bypass the regular boot procedure, mainly for these reasons:
1. when for any reason (for example because of an hardware failure) the Hard Disk is
unavailable. In this case it is possible to boot from System Disk and get the full MCU
functionality, except of the automatic update and restore procedures at start-up. The System
will be completely reinitialized during this boot procedure.
2. when the whole system is initialized for the first time, a special bootable SD Card is provided,
that memory card can format and initialize both the System disk and the Hard disk
3. when some particular system upgrade is necessary, also in this case this task can be
accomplished with a special bootable SD Card
In order to have a regular boot, simply press the Power Button for a while, then release it.
MCU will boot from the Hard Disk.
To get the alternative boot it’s necessary to keep the Power Button pressed for some seconds
(about 15 seconds) until the device turns on. Only after that the button could be released.
MCU will boot from the SD Card if is inserted, or from the System Disk if not.
While is booting from System Disk, the MCU is started using DOS files, Windows CE image and
windows registry in system disk. The applications are still in the hard disk.
It’s possible to setup MCU using “Sys Utils” application in \HARD DISK\SYSAPPS\ so, during boot from
system disk, the content of the hard disk is formatted and replaced with the content of the system
disk. In this case you can recover, from backup, application files which are corrupted, but it is
necessary to keep backup updated using the system “update” folder.

The information contained here are property of DIGITAX Automotive Electronics Italy, and extremely confidential. Any disclosure, copying, distribution to third
party is strictly prohibited.
10
Appearance