Matrix-orbital VK204-25 Legacy Manual do Utilizador

VK204-25-USBTechnical ManualRevision: 1.1

1.5.2 uProjectuProject was designed by Matrix Orbital to provide a simple and easy to use interface that will allow youto test all of the features of

1 Power Connector 5 Serial Header2 Keypad Header 6 GPOs3 Manual Override 7 Optional Dallas 1-Wire Bridge4 USB Header 8 Protocol Select JumpersFigure 9

Pin 1 NCPin 2 GNDPin3 GNDPin 4 +5VFigure 10: Alternate Power Connector2.2 Keypad Interface ConnectorThe LK204-25-USB provides a Keypad Interface Conne

2.3 Manual OverrideThe Manual Override is provided to allow the LK204-25-USB to be reset to factory defaults. This canbe particularly helpful if the d

Figure 13: USB HeaderTable 2: Power RequirementsStandardSupply Voltage +5Vdc ±0.25VSupply Current 50 mA (Backlight Off)Backlight Current 185 mA (Backl

Figure 14: Serial Headerthe GPO. This is limited by a 240 ohm resistor which is located to the above right of the GPOs as picturedbelow in figure 15. I

2.7 Dallas 1-Wire BridgeIn addition to the six general purpose outputs the LK204-25-USB offers an optional Dallas 1-wire bridge,to allow for an aditio

Figure 17: Protocol Select Jumpers3 Troubleshooting3.1 The display does not turn on when power is applied.• First, you will want to make sure that you

3.3 The display module is communicating, however text cannotbe displayed.• A common cause may be that the contrast settings have been set to low. The

NAK to indicate that the transmission is over.The VK204-25-USB has some speed limitations, especially when run in I2C mode. Here are someconsideration

ContentsContents ii1 Getting Started 11.1 Display Options Available . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11.2 Accesso

4.1.4 USB CommunicationThe VK204-25-USB is a USB device that offers identical communication protocol as the serial comport.capable of communicating vi

Description This command sets the RS-232 port to the specified [speed]. The changetakes place immediately. [speed] is a single byte specifying the desi

ExamplesCrystal Speed 16 MhzDesired BAUD 13,500speed =crystalspeed8∗ DesiredBaud− 1speed = 148.15 − 1speed =16, 000, 0008∗ 13, 500− 1speed = 147.15• L

5.1.1 Character SetFigure 18: Character Set5.1.2 Control CharactersIn addition to a full text set, the VK204-25-USB display supports the following ASC

SyntaxHexadecimal 0xFE 0x51Decimal 254 81ASCII 254 “Q”Description When auto scrolling is on, it causes the display to shift the entiredisplay’s conten

5.6 Set Auto Line Wrap OnSyntaxHexadecimal 0xFE 0x43Decimal 254 67ASCII 254 “C”Description Enabling Auto Line Wrap will allow the cursor to automatica

Description This command will allow you to manually set the cursor position, whichcontrols the text insertion point, by specifying the [col] and [row]

Description This command will move the cursor forward one space. If thiscommand is sent when the cursor is at the bottom right position thecursor will

SyntaxHexadecimal 0xFE 0x4E [refID] [data]Decimal 254 78 [refID] [data]ASCII 254 “N” [refID] [data]ParametersParameter Length DescriptionrefID 1 Chara

Description New to the VK204-25-USB has added five non-volatile memory banksfor custom character storage. This is intended to allow you to createyour o

5.6 Set Auto Line Wrap On . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 215.7 Set Auto Line Wrap Off . . . . . . . . . . .

Description Using this command you may create the custom characters. that will bestored in memory bank zero, which will be used in the startup screen.

6.8 Initialize Large NumbersSyntaxHexadecimal 0xFE 0x6EDecimal 254 110ASCII 254 “n”Description This command will load the default large number charact

6.11 Place Horizontal Bar GraphSyntaxHexadecimal 0xFE 0x7C [Col] [Row] [Dir] [Length]Decimal 254 124 [Col] [Row] [Dir] [Length]ASCII 254 “|” [Col] [Ro

SyntaxHexadecimal 0xFE 0x76Decimal 254 118ASCII 254 “v”Description This command will load the wide vertical bar characters into the volatilememory. If

7.2 General Purpose Output OffSyntaxHexadecimal 0xFE 0x56 [Num]Decimal 254 86 [Num]ASCII 254 “V” [Num]ParametersParameter Length DescriptionNum 1 GPO

Description This command will set the startup state for the GPO on the next powerup. A value of one will cause the GPO to be off on the next startupwh

Description This command will allow you to begin communicating with the deviceson the 1-wire bus by returning a packet containing device informationfo

Description This command will perform a single transaction on the 1-wire bus inthis order:1. Bus Reset.2. Transmit data onto the bus.3. Receive data f

connector. The keypad is scanned whenever a key is pressed;there is no continuous key scan. This meansthat key presses are dealt with immediately with

Description This command returns any buffered key presses via the serial interface.The host system must be set up to receive key codes. When the displ

10 Display Functions 3710.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3710.2 Display On . . .

9.7 Set Auto Repeat ModeSyntaxHexadecimal 0xFE 0x7E [mode]Decimal 254 126 [mode]ASCII 254 “~” [mode]ParametersParameter Length Descriptionmode 1 Auto

Description This command turns auto repeat mode off. See Set Auto Repeat Mode.Remembered No9.9 Assign Keypad CodesSyntaxHexadecimal 0xFE 0xD5 [KDown]

Description This command turns the backlight on after the [minutes] timer hasexpired, with a ninety minute maximum timer. A time of 0 specifies thatthe

SyntaxHexadecimal 0xFE 0x91 [brightness]Decimal 254 145 [brightness]ParametersParameter Length Descriptionbrightness 1 Brightness setting (0 to 3).Des

Description This command allows you to switch the remember function on and off.To use the remember function, set remember to on, then set all of these

DescriptionParanoia allows you to lock the module from displaying information, aswell as enables the protection of the filesystem and module settings.E

ParametersParameter Length Descriptionlevel 1 Sets the data lock levelDescription This command will set and save the data lock level. See the Data Loc

SyntaxHexadecimal 0xFE 0x36Decimal 254 54ASCII 254 “6”Description This command will return a byte representing the version of the module,see the follo

Description This command will return a hex value corresponding to the the modelnumber of the module see the following table:Hex Product ID Hex Product

13 Command Summary13.1 CommunicationsDescriptionSyntaxPageChanging the I2C SlaveAddressHexadecimal 0xFE 0x33 [adr]Decimal 254 51 [adr]ASCII 254 “3” [a

1 Getting StartedThe VK204-25-USB is an intelligent VFD display designed to decrease development time by providingan instant solution to any project.

DescriptionSyntaxPageMove Cursor BackHexadecimal 0xFE 0x4CDecimal 254 76ASCII 254 “L”22Move Cursor ForwardHexadecimal 0xFE 0x4DDecimal 254 77ASCII 254

DescriptionSyntaxPageInitialize Narrow VerticalBarHexadecimal 0xFE 0x73Decimal 254 115ASCII 254 “s”28Initialize Wide VerticalBarHexadecimal 0xFE 0x76D

DescriptionSyntaxPagePoll Key PressHexadecimal 0xFE 0x26Decimal 254 38ASCII 254 “&”34Clear Key BufferHexadecimal 0xFE 0x45Decimal 254 69ASCII 254

DescriptionSyntaxPageWrite Customer DataHexadecimal 0xFE 0x34 [data]Decimal 254 52 [data]ASCII 254 “4” [data]42Read Customer DataHexadecimal 0xFE 0x35

Command DescriptionPageHex Dec ASCII0x4F 79 “O” Auto Transmit Key Presses Off 340x51 81 “Q” Auto Scroll On 190x52 82 “R” Auto Scroll Off 200x53 83 “S”

14 Appendix14.1 Specifications14.1.1 EnvironmentalTable 66: Environmental SpecificationsStandard Temperature Extended TemperatureOperating Temperature 0

14.3 Physical LayoutFigure 19: Physical Diagram14.4 DefinitionsE Extended Temperature (-20C to 70C)MSB Most Significant ByteLSB Least Significant Byte14.

Revision 3.0 Initial ReleaseRevision 3.1 Updated communication summaryTable 69: Revision History14.6 Revision HistoryMatrix Orbital VK204-25-USB 53

Figure 1: VK204-25-USB Filter OptionsFigure 2: 3ft mini-B USBFigure 3: Aluminum MountingsMatrix Orbital VK204-25-USB 2

Figure 4: Keypad MountingsFigure 5: Mounting KitsMatrix Orbital VK204-25-USB 3

Figure 6: 4X4 Keypad1.3 Features• 20 column by 4 line text vacuum fluorescent display• USB communication protocol• Six, 5V -20mA, general purpose outpu

1.4 Connecting to a PCThe LK204-25-USB connects seamlessly to a PC and it is an excellent means of testing the functionality.To connect your display t