Matrix Orbital LCD4041 Bedienungsanleitung

LCD4041

User Manual

IMPORTANT: READ PAGE 2 BEFORE APPLYING POWER.

Connecting LCD4041

The LCD4041 serial interface has two types of communications: RS-232 and I2C.

Power is applied to the white or brown four pin SIP connector as follows:

Pin 1: +5Vdc

Pin 2: = SCL (I2C clock)

Pin 3: = SDA (I2C data)

Pin 4: Gnd

If the sole data source is via RS - 232, the data input is via the DB-9 connector. Pins 2 and 3 of the four pin SIP

connector are not used.

Wide Voltage Option (LCD4041-VPT)

Power is applied to the white or brown four pin SIP connector as follows:

Pin 1: +7 - 15Vdc

Pin 2: = SCL (I2C clock)

Pin 3: = SDA (I2C data)

Pin 4: Gnd

If the sole data source is via RS - 232, the data input is via the DB-9 connector. Pins 2 and 3 of the four pin SIP

connector are not used.

WARNING:

DONOT APPLYANY POWER WITH REVERSED POLARIZATION.

DONOT APPLYANY VOLTAGE OTHER THAN THE SPECIFIED VOLTAGE.

DONOT USE ANY CABLES OTHER THAN THE CABLES SUPPLIED BYMATRIX ORBITAL, UNLESSYOU ARE AWARE OF

THE MODIFICATIONS REQUIRED.

DONOT UNDER ANY CIRCUMSTANCES USE AN UNMODIFIED FLOPPYDRIVE POWER CABLE.

DB-9 Connector Pin Out

RS - 232 port: This connector is wired so that a standard “straight through” 9 pin D-sub cable may be used to connect

the modules on a standard serial port such as comm ports on PCs. Note that this device complies to the EIA232

standard in that it uses signal levels from +/- 3V to +/- 12V. It will not operate correctly at TTL (0 to +5V) levels.

Pin Number Description

2Data Out

3Data In

5Ground

9+5Vdc

Note: Signals are shown as interpreted by the Liquid Crystal Display module. 2

Pin 9

Jumper Point

Power may be provided to the module by pin 9 of the DB-9 connector instead of through the 4-pin SIP. If power is to

be applied using the DB-9, it must be a regulated +5Vdc supply. If the user intends to use pin 9 as the power source,

the user must solder the 5 volt jumper point beside the DB-9 connector. If you have any further questions or con-

cernsdon’thesitatetocontactMatrixOrbitalat[email protected].

WARNING:USE THIS METHOD OF POWER UP ATYOUR OWN RISK. APPLICATION OF AVOLTAGE TO PIN 9 GREATER THAN 5.5VOLTS

WILL CAUSE IMMEDIATE DESTRUCTION OF UNIT AND VOID THE WARRANTY.

Note: This applies to wide voltage units (V and VPT extensions) as well as standard 5 volt units.

General Purpose Output (GPO)

The GPO is meant to be used as a pair. The positive side of the GPO is connected to a power source of +5Vdc

supplied by the module at 20mA. The negative side of the GPO is able to find a path to ground through a 240 ohm

resistor. This resistor will limit the current flow through a GPO to approximately 20mA in the event of a short circuit.

If the device which is being driven by a GPO requires a relatively high current (such as a relay) and has an internal

resistance of it’s own greater than 250 ohms, then, the 240 ohm resistor may be shorted. You will find this resistor

directly below the negative pin of the general purpose output.

Note: This operation requires soldering. The GPO does not have any over current or over/under voltage protection

so care must be taken if the user decides to connect the negative side differently. For instance if the external device is

a relay it must be fully clamped to absorb any generated back electromotive force (EMF)

Command Set

WriteText

This section of the manual allows the user to send commands to the LCD to alter the appearance or behavior of the

display. To utilize a command, the user must send a command prefix followed by the command in the format de-

scribed in this portion of the manual. Any characters sent without a command prefix will be interpreted as text and

will be displayed on the module at the current cursor position. The current cursor position will be incremented for

each character received. Please note that unless line wrap is turned on, the text will follow the memory map of the

module.

The command set discusses in detail what the LCD's capabilities of and how to execute each command. The basic

format of all the commands

listed in this segment that do not require parameters is:

For commands that do require parameters however the format is as follows:

<commandprefix><command>[<parameter><parameter>.....]

Set I²C Address

ASCII '3', Hex 33, Decimal 51

Syntax0xFE0x33

To write the I²C address of the module, send a command prefix followed by the character '3', followed by a write

address. This command sets the I²C write address of the module. This value must be an even number and the read

address is one higher. For example if the I²C write address is set to 0x50, then the read address is 0x51. The change in

address is immediate. This address is 0x50 by default, and is reset temporarily back to that value when the "Manual

Over-ride" jumper is used on power up. Refer to the Appendix for more details.

Set Serial Number

ASCII '4', Hex 34, Decimal 52

Syntax 0xFE 0x34<serial number byte one><serial number byte two>

To set the serial number of the module, send a command prefix followed by the character '4', followed by two values

defining the first and second serial byte. This command sets the two byte serial number of the module. Upon the

execution of this command, the module will echo these two bytes back over the RS-232 interface. The serial number

may be set only once. Any future attempt to execute this command will result in no change and the module will return

to the originally set serial number.

ReadSerialNumber

ASCII '5', Hex 35, Decimal 53

Syntax0xFE0x35

To read the serial number, send a command prefix followed by the character ‘5’. This command will return, over the

RS-232 interface, the serial number of the module as it was previously stored.

Read Version Number

ASCII '6', Hex 36, Decimal 54

Syntax0xFE0x36

To read the version number send a command prefix followed by the character '6'. This command will return, over the

RS-232 interface, the firmware revision number of the module as it is stored.

Read Module Type Value

ASCII '7', Hex 37, Decimal 55

Syntax0xFE0x37

To read the module type value, send a command prefix followed by the character '7'. This command will return, over

the RS-232 interface, the model type value of the module. Values for various modules at the time of this publication

are as follows:

Set RS - 232 Port Speed

ASCII '9', Hex 39, Decimal 57

Syntax0xFE0x39<speed>

To set the RS-232 port speed, send a command prefix followed by the character '9', followed by a value defining the

desired<speed>. This command sets the LCD's RS-232 port to the specified<speed>. The change takes place

immediately. <speed> is a single byte specifying the desired port <speed> Valid speeds are shown in the table

below. The LCD can be manually reset to 19,200 baud in the event of an error during transmission (including trans-

mitting a value not listed below). Refer to the appendix for details.

Load New Start Up Screen

ASCII‘@’, Hex 40, Decimal 64

Syntax 0xFE 0x40<160 characters>

This command allows you to load a new start up screen. To execute this you must send a command prefix followed by

the character '@', followed by 160 characters to format the screen to your specifications. The characters on the

module should be formatted as shown in the diagram.

Set Contrast

ASCII 'P', Hex 50, Decimal 80

Syntax0xFE0x39<contrast>

To set the contrast of the display, send a command prefix followed by the character 'P', followed by a hex value

defining the contrast. This command sets the display's contrast to <contrast>, where <contrast> is a value between

0x00 and 0xFF (between 0 and 255). Lower values cause “on” elements in the display area to appear lighter, while

higher values cause “on” elements to appear darker. Lighting conditions will affect the actual value used for optimal

viewing. Individual LCD modules will also differ slightly from each other in appearance. In addition, values for

optimal viewing while the LCD backlight is on may differ from values used when backlight is off.

LCD0821 –0x01 LCD2021 –0x03 LCD1641 –0x04

LCD2041 –0x05 LCD4021 –0x06 LCD4041 –0x07

LK202-25 –0x08 LK204-25 –0x09 LK404-55 –0x0A

VFD2021 –0x0B VFD2041 –0x0C VFD4021 –0x0D

VK202-25 –0x0E VK204-25 –0x0F GLC12232 –0x10

GLC12864 –0x11 GLC128128 –0x12 GLC24064 –0x13

GLK12864-25 –0x14 GLK24064-25 –0x15 GLK128128-25 –0x21

GLK12232-25 –0x22 LK404-AT –0x31 VFD1621 –0x32

LK402-12 –0x33 LK162-12 –0x34 LK204-25PC -0x35

Hex Value Speed

FF Hex 1200 baud

81 Hex 2400 baud

20 Hex 9600 baud

0F Hex 19200 baud

Character 1

----------------------------------------------

Character 40

Character 41

----------------------------------------------

Character 80

Character 81

----------------------------------------------

Character 120

Character 121

----------------------------------------------

Character 160

Set Contrast and Save Value

Hex 91, Decimal 145

Syntax0xFE0x91

This command works in exactly the same way as the “Set Contrast” command. The only difference is it saves the

contrast value in the memory of the module, whereas, the previous command only changes the value for the duration

of use.

Auto Line Wrap On

ASCII 'C', Hex 43, Decimal 67

Syntax0xFE0x43

This command enables the automatic line wrap function. Transmitted characters which overrun the width of the

display will automatically wrap to the next line. The bottom line wraps to line 1 of the display. To carry out this

command the user must send a command prefix followed the character 'C'.

Auto Line Wrap Off

ASCII 'D', Hex 44, Decimal 68

Syntax0xFE0x44

This command disables the automatic line wrapping function. To turn off the auto line wrapping, send a command

prefix followed by the character 'D'.

Auto Scroll On

ASCII 'Q', Hex 51, Decimal 81

Syntax0xFE0x51

To turn the automatic line scrolling on, send a command prefix followed by the character 'Q'. In combination with the

“Auto Line Wrap” command the text will automatically wrap and scroll up.

Note: “Auto Line Wrap” must be enabled for “Auto Scroll” to work properly.

Auto Scroll Off

ASCII 'R', Hex 52, Decimal 82

Syntax0xFE0x82

To turn the automatic line scrolling off, send a command prefix followed by the character 'R'.

Backlight On

ASCII 'B', Hex 42, Decimal 66

Syntax0xFE0x42<number of minutes>

To turn the backlight on, send a command prefix followed by the character 'B' as well as the number of minutes for the

backlight to be activated. If <minutes> is sent as zero then the backlight will remain on indefinitely. The maximum

value for <minutes> is 100. Example:

<commandprefix> 0xFE

<command> 0x42

<minutes> 0 to 100

Backlight Off

ASCII 'F', Hex 46, Decimal 70

Syntax0xFE0x46

To turn the backlight off, send a command prefix followed by the character 'F'.

ClearDisplay

ASCII 'X', Hex 58, Decimal 88

Syntax0xFE0x58

This command clears any text and graphics off the display. To clear the display, send a command prefix followed the

character 'X'.

Cursor On

ASCII 'J', Hex 4A, Decimal 74

Syntax0xFE0x4A

To turn the cursor on at the current position, send a command prefix followed by the character 'J'. Note cursor is on by

default at power up.

Cursor Off

ASCII 'K', Hex 4B, Decimal 75

Syntax0xFE0x4B

To turn the cursor off at the current position , send a command prefix followed by the character 'K'.

Cursor Left

ASCII 'L', Hex 4C, Decimal 76

Syntax0xFE0x4C

To move the cursor one space to the left of current position, send a command prefix followed by the character 'L'.

Cursor Right

ASCII 'M', Hex 4D, Decimal 77

Syntax0xFE0x4D

To move the cursor one space to the right of the current position, send a command prefix followed by the character

'M'.

Cursor Blink On

ASCII 'S', Hex 53, Decimal 83

Syntax0xFE0x53

To turn on the blinking cursor at the current position, send a command prefix followed by the character 'S'. Please

note that the blinking cursor is on by default at power up.

Cursor Blink Off

ASCII 'T', Hex 54, Decimal 84

Syntax 0xFE 0x54

To turn off the blinking cursor at the current position send a command prefix followed by the character 'T'.

Create Custom Character

ASCII 'N', Hex 4E, Decimal 78

Syntax 0xFE 0x4E<character between 0x00 and 0x07><8 bytes>

This command creates a custom character. For the LCD4041 the user can have up to eight custom characters. To

execute this command, send a command prefix followed by the character 'N'. The display will now await the number

which identifies the custom character. This number must be between 0x00 and 0x07. When the module determines

what character it's working on, then the user must send 8 bytes. This defines the display character. See the diagram

below for and explanation of the display character structure.

MSB LSB

12345Data Byte 1

678910

Data Byte 2

12 13

14 15

Data Byte 3

17 18

19 20

Data Byte 4

22 23

24 25

Data Byte 5

27 28

29 30

Data Byte 6

32 33

34 35

Data Byte 7

37 38

39 40

Data Byte 8

1 2 3 4 5

6 7 8 9 10

11 12 13 14 15

16 17 18 19 20

21 22 23 24 25

26 27 28 29 30

31 32 33 34 35

36 37 38 39 40

Cursor Line

Pixel Layout of Display Characters

General Purpose Output On

ASCII 'W', Hex 57, Decimal 87

Syntax0xFE0x57

To turn the general output purpose on, send a command prefix followed by the character ‘V’.

Note: The output is a current sink (Max 20mA)

General Purpose Output Off

ASCII 'V', Hex 56, Decimal 86

Syntax0xFE0x56

To turn the general output purpose off, send a command prefix followed by the character 'W'.

Go To Position

ASCII 'G', Hex 47, Decimal 71

Syntax 0xFE 0x47<column number><row number>

Set the current position. Send a command prefix followed by the character 'G' and two numbers defining in order, the

column to move to and the row to move to. The format for column 20 and row 3 would be:

<commandprefix> 0xFE

<command> 0x47

<column number> 0x14

<row number> 0x03

Go To Top Left

ASCII 'H', Hex 48, Decimal 72

Syntax0xFE0x48

To reset the current position to top left, send a command prefix followed by the character 'H'. In the following

example the format is displayed for this command. 8

DiagramA

Initialize Large Digits

ASCII 'n', Hex 6E, Decimal 110

Syntax0xFE0x6E

Before any large digits may be created, this command must be executed. It only needs to be sent once to initialize the

custom characters for large digits. Due to the fact large digits use pre-determined custom characters, no user custom

characters may be displayed or created while digits are in use.

Place Large Digit

ASCII '#', Hex 23, Decimal 35

Syntax0xFE0x35<column number><digit number>

This command allows the creation of large digits on the LCD screen. To execute this command the user must send a

command prefix followed by the character '#' and the column number where the digit is to be placed. Then the user

must enter the number of the large digit which is required in hexadecimal. Numbers of almost full display height may

be placed along side regular text on four row displays. The column number has a maximum value which is less than the

display width because the digits are all three columns wide. The module must be initialized for large digit creation

before large digits may be placed. If regular text and large digits are mixed on one screen, the user should always set

the display cursor position before placing regular text because the creation of a large digit will leave the cursor

position to the bottom right of the large digit and not at the last regular text write position. The format for this

command is as follows:

<commandprefix> 0xFE

<command> 0x23

<column number> 0x01 to 0x26 (1 to 38 for a 40 column display)

<digitnumber> 0x00 to 0x09 (numbers 0 to 9)

Initialize Horizontal Bar Graph

ASCII 'h', Hex 68, Decimal 104

Syntax0xFE0x68

Before any horizontal bar graphs may be created, this command must be executed. It only needs to be sent once to

initialize the custom characters for bar graph creation. Due to the fact bar graphs use custom characters, no user

custom characters may be displayed or created while bar graphs are in use.

MakeHorizontal Bar Graph

ASCII '|', Hex 7C, Decimal 124

Syntax0xFE0x7C<columnnumber><rownumber><direction><barlength>

This command places a horizontal bar graph at the specified column and row with the specified width. The format of

the command is as follows:

<command prefix > 0xFE

<command> 0x7C

<column number> 0x01 to 0x28 for a forty column display

<row number> 0x01 to 0x04 for a four line display

<direction> 0 for left to right, 1 for right to left

<bar length> 0x00 to 0xC8 (0 to 200) for a forty column display

Bar length is in pixel widths. On a forty column display the maximum bar graph width is two hundred pixels (if the bar

graph starts at the edge). This is due to the fact that each of the forty columns on the display are five pixels wide. The

width of the space between columns is not taken into account.

Initialize Thick Vertical Bar Graph

ASCII 'v', Hex 76, Decimal 118

Syntax0xFE0x76

Before any thick vertical bar graphs may be created, this command must be executed. It only needs to be sent once to

initialize the custom characters required for bar graph creation. Due to the fact bar graphs use custom characters, no

user custom characters may be displayed or created while bar graphs are in use.

Initialize Thin Bar Vertical Graph

ASCII 's', Hex 73, Decimal 115

Syntax0xFE0x73

Before any thin vertical bar graphs may be created, this command must be executed. It only needs to be sent once to

initialize the custom characters required for bar graph creation. Due to the fact bar graphs user custom characters, no

user custom characters may be displayed or created while bar graphs are in use.

MakeVertical Bar Graph

ASCII '=', Hex 3D, Decimal 61

Syntax 0xFE 0x3D<column number><bar length>

This command places a bar graph at the specified column with the specified height. The style of the vertical bar graph

whether it be thick or thin is selected by the initialize vertical bar graph command. If thick bar graphs are preferred,

the 'v' command should be sent to initialize the bar graph. If a thin vertical bar graph is desired, the 's' command

should be sent to initialize the bar graph. The format for the command is as follows:

<commandprefix> 0xFE

<command> 0x3D

<column number> 0x01 to 0x28 for a forty column display

<bar length> 0x00 to 0x20 (1 to 32) for a four line display.

Bar height is in pixel widths. On a four line display the maximum bar graph height is thirty-two, this is because each of

the lines in the display are eight pixels high. The width of the space between the lines is not taken into account.

Note: Vertical bar graphs may not be used with horizontal bar graphs, and thick bar graphs may not be used with

thin bar graphs. This is because all these functions make use of the same “custom character” spaces. As a result,

custom characters are also unavailable while any of these functions are in use.

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