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KeyAT-4 Keyboard Port Adapter

 

5/19/2007

 

4 

L3 Systems

 

Sending Data 

The main job of the KeyAT is to transfer data from the RS-232 port and send it through 
to the computer's keyboard port.  Data can be sent using ASCII, ASCII control codes, 
DOS scan codes, keyboard scan codes or ASCII hex.  A line can have a maximum 
length of 80 characters and should end with an <ENTER> (CR, hex 0D). When using 
immediate mode, data and commands are interpreted as received, and buffered up to 80 
characters.  If you get more than 80 characters ahead of the computer, the additional 
characters will be ignored.  

In line turn-around mode, the KeyAT sends a colon prompt after the data has been 
processed, signaling that it is ready for another command. The example shows the ASCII 
characters ‘DIR<ENTER>’ being sent through the KeyAT.

  

Example:

 

    

KeyAT, V4.0x1, [C]L3 Systems, Inc. 2005 

  :DIR^M<ENTER> 

  : 

Commands 

Commands are instructions to the KeyAT to do something other than just pass data 
through to the computer.  All commands begin with a ~ (tilde, hex 7E) character followed 
by a command character and then in some cases some data. 

~@  Disable Commands

 – All commands are disabled until 10 consecutive tildes 

(~~~~~~~~~~) or reset/power cycle. 

~~~~~~~~~~ 

Reset/Enable Commands

 – If commands are disabled, sending 10 

consecutive tilde (~) characters will enable commands.  If commands 
are enabled, this will reset the KeyAT (& run power-up string if 
loaded). 

Data Mode Commands 

The four mode commands set the way data is interpreted by the KeyAT.  A mode is set 
until another mode is given or until a power failure occurs.

 

~C 

Character Mode

 - is the default mode of operation.  When this mode is set, any 

ASCII character except ~ (tilde, hex 7E), ^ (caret, hex 5E), and CR (return, hex 
0D) is converted to the scan codes for that character.  Each ASCII character will 
be sent to the computer with the corresponding “make” and “release” codes.  
Allow enough time for the codes to be sent through to the computer. 

Control codes may be sent by a combination of a ^ (caret, hex 5E), and the 
corresponding letter.  For example, a control C (Hex 03) is ^C. 

~H 

Hex ASCII Mode

 - Data is interpreted as hexadecimal encoded ASCII.  For 

example, to send the computer the character 'A', you would need to send its 
hexadecimal ASCII value (Hex 41) as two ASCII digits, 4 and 1. 

Содержание KeyAT-4

Страница 1: ...T 4 Version 4 0 RS 232 Copyright 2006 Keyboard L3 Systems Inc Port Adapter Redmond WA 3 Systems L3 Systems Inc KeyAT 4 Part SA0064 www L3sys com Pb RoHS Computer PS 2 Keyboard Serial No 2602249 RS 232 PS 2 ...

Страница 2: ...sfer to keyboard Xnn Sends hex byte nn to keyboard 7 Status request Response AA EELLDBTM 6 Sleep Znn Sleeps nn seconds 7 Set turnaround delay Pnn Sets turnaround to nn milli sec 6 Send CR mode F Sends CR through 6 Setup Mode SETUP Enter Setup Mode Commands below 8 Command Pg Command Pg D Set Config to default 9 LK Load Scan Code Table 9 LC Load Config string 9 PK Print Scan Code Table 10 PC Print ...

Страница 3: ...g problems with target software Serial Keyboard You can use the KeyAT to send and receive from a Keyboard attached to an RS 232 port Attaching input devices Allows you to attach RS 232 devices to the keyboard port such as bar code readers scales and credit card readers Connections The following illustrates a typical connection of the KeyAT 1 The keyboard connects to the 6 pin mini DIN To Keyboard ...

Страница 4: ...modem On the 9 pin DB 9S connector it transmits data on pin 2 and receives data on pin 3 No other RS 232 signal is required for it to operate Pin 6 Pin 9 Pin 1 Pin 5 Pin Signal KB232 Function 1 DCD RS 232 Output High when Ready 2 RX Receive from KB232 RS 232 Output 3 TX Transmit to KB232 RS 232 Input 4 DTR RS 232 Input Not Required 5 Signal Ground Ground 6 DSR RS 232 Output High when Ready 7 RTS C...

Страница 5: ...tor can be used to provide 5 volts power K1 Jumper K1 connects DB 9 Pin 9 to 5 volts This can be used to power KeyAT from DB 9 connector Warning This is not normally connected If 5V power is connected to PC then damage can occur if also connected to external supply 5V Pin 4 GND Pin 3 CLOCK Pin 5 Male cable connector DATA Pin 1 1 2 3 4 5 6 1 2 3 4 5 6 CLOCK Pin 5 GND Pin 3 DATA Pin 1 5V Pin 4 KeyRF...

Страница 6: ...haracter followed by a command character and then in some cases some data Disable Commands All commands are disabled until 10 consecutive tildes or reset power cycle Reset Enable Commands If commands are disabled sending 10 consecutive tilde characters will enable commands If commands are enabled this will reset the KeyAT run power up string if loaded Data Mode Commands The four mode commands set ...

Страница 7: ...rly completed Send a scan code If you want to send a scan code without going into scan code mode then use the nn command This is useful for the occasional function key arrow key or any other keys that doesn t have an ASCII equivalent See the scan code table later on for a list of valid scan codes nn Send Scan Code This scan code nn Example 73 ENTER sends PgUp Up Down Scan Codes Use these two comma...

Страница 8: ...overrun the PC s keyboard receive buffer Pnn Set Turn Around Delay nn milliseconds This sets the delay that the KeyAT waits before responding to a command The default setting is 0 Note you must send two digits For 7 milliseconds send P07 Keyboard Monitor The KeyAT can send either binary key codes M or ASCII translations Q of keys struck at the local keyboard through to the RS 232 port The QWERTY m...

Страница 9: ...urn on or off local keyboard LED indicators The nn field is an ASCII hex encoded binary field where b0 Scroll lock b1 Num Lock b2 Caps Lock Examples D01 Scroll Lock on Caps Num Lock off D04 Caps Lock on Scroll Num Lock off D00 Turn off all LEDs Sending Data to the Keyboard Xnn Send Data to Keyboard Use this command to send the ASCII hex encoded byte nn to the keyboard This command requires technic...

Страница 10: ...and Note that the results shown below are the default settings Setup PC ENTER Displays Configuration Data 9600 NoPar YesCmd NoCR LM NM 0D 7E Setup The configuration settings are defined as follows The underlined characters represent the minimum required entry in each field 9600 Baud Rate 1200 2400 4800 9600 19200 38400 and 57600 are valid parameters 9600 is the default setting NoPar RS 232 Parity ...

Страница 11: ...n Tera Term send ten Alt B s and then quickly connect the KeyAT while the break is in progress Restoring Configuration Default Settings Restore the KeyAT default configuration with the D command Setup D ENTER Restores default settings Setup Key Scan Code Table The KeyAT allows you to define custom keyboard scan codes for any ASCII character in the Code Table Loading Key Scan Codes The LK command l...

Страница 12: ...mmand string when power is applied This string can include keys to send to the computer and or KeyAT commands It s strongly recommended when using this feature to start the string with a delay command Znn to allow the KeyAT to wait for the computer to finish its power on sequence Loading the Power ON String The LP command loads a code table entry LP String Loading Power On String Example Setup LP ...

Страница 13: ...delays 80 seconds and then sends a DIR Enter command Displaying Reset string The PR command displays the Power On string Setup PR ENTER Z80DIR M Shows Reset string loaded in example above Setup Test KeyAT T Test KeyAT This command to the KeyAT causes it to undergo tests to validate the keyboard and computer interface You will see the keyboard LED s cycle testing the keyboard interface Setup Y ENTE...

Страница 14: ...rl F1 key 56 59 56 ENTER Sends Alt F1 key 72 ENTER Sends Up Arrow key Use of different data modes C ENTER Sets to character mode DIR M ENTER Sends DOS a directory command H ENTER Sets to ASCII HEX mode 4449520D ENTER Sends DOS a directory command S ENTER Sets to scan code mode 32231928 ENTER Sends DOS a directory command K ENTER Sets to key code mode 23F02343F0432DF02D5AF05A ENTER Sends DOS a dire...

Страница 15: ...49 17 17 W 1D F0 1D 53 53 4A F0 4A 18 18 E 24 F0 24 53 93 E0 4A E0 F0 4A 19 19 R 2D F0 2D 54 54 Right Shift 59 F0 59 20 20 T 2C F0 2C 55 55 7C F0 7C 21 21 Y 35 F0 35 55 A4 Prt Scrn E0 12 E0 7C E0 F0 7C E0 F0 12 22 22 U 3C F0 3C 56 56 Left Alt 11 F0 11 23 23 I 43 F0 43 56 A5 Right Alt E0 11 E0 F0 11 24 24 O 44 F0 44 57 57 Space 29 F0 29 25 25 P 4D F0 4D 58 58 Caps Lock 58 F0 58 26 26 54 F0 54 59 59...

Страница 16: ...0 F0 6B E0 F0 12 83 83 Delete E0 12 E0 71 E0 F0 71 E0 F0 12 75 A9 Kpad Left Arrow 4 6B F0 6B 83 B5 Kpad Del 71 F0 71 76 76 5 73 F0 73 84 Undefined 77 77 Rt Arrow E0 12 E0 74 E0 F0 74 E0 F0 12 85 Undefined 77 B0 Kpad Rt Arrow 6 74 F0 74 86 Undefined 78 78 79 F0 79 87 87 F11 78 F0 78 79 79 End E0 12 E0 69 E0 F0 69 E0 F0 12 88 88 F12 07 F0 07 79 B1 End 1 69 F0 69 89 Undefined 80 80 Down Arrow E0 12 E...

Страница 17: ...2A 7C F0 7C VT K 0B 14 42 F0 42 F0 14 2B 79 F0 79 FF L 0C 14 4B F0 4B F0 14 2C 41 F0 41 CR M 0D 3A F0 3A 2D 7B F0 7B SO N 0E 14 31 F0 31 F0 14 2E 49 F0 49 SI O 0F 14 44 F0 44 F0 14 2F 4A F0 4A DLE P 10 14 4D F0 4D F0 14 0 30 45 F0 45 DC1 Q 11 14 15 F0 15 F0 14 1 31 16 F0 16 DC2 R 12 14 2D F0 2D F0 14 2 32 1E F0 1E DC3 S 13 14 1B F0 1B F0 14 3 33 26 F0 26 DC4 T 14 14 2C F0 2C F0 14 4 34 25 F0 25 NA...

Страница 18: ...j 6A 3B F0 3B K 4B 12 42 F0 42 F0 12 k 6B 42 F0 42 L 4C 12 4B F0 4B F0 12 l 6C 4B F0 4B M 4D 12 3A F0 3A F0 12 m 6D 3A F0 3A N 4E 12 31 F0 31 F0 12 n 6E 31 F0 31 O 4F 12 44 F0 44 F0 12 p 70 4D F0 4D P 50 12 4D F0 4D F0 12 q 71 15 F0 15 Q 51 12 15 F0 15 F0 12 r 72 2D F0 2D R 52 12 2D F0 2D F0 12 s 73 1B F0 1B S 53 12 1B F0 1B F0 12 t 74 2C F0 2C T 54 12 2C F0 2C F0 12 u 75 3C F0 3C U 55 12 3C F0 3C...

Страница 19: ...y consequential damage or losses from the use of or inability to use its products Any unauthorized repair or modification of the product voids the warranty L3 Systems makes no other warranty express or implied nor have we authorized anyone to make representations to the contrary FCC Class B Approval Information NOTE This equipment has been tested and found to comply with the limits for a class B d...

Страница 20: ...ions You can monitor keyboard session to develop keyboard test scripts Connect a Keyboard to an RS 232 Port You can use a KeyAT to connect a keyboard to a computer s RS 232 port and receive key codes from the keyboard Attaching input devices Allows you to attach RS 232 devices to the keyboard port such as bar code readers scales and credit card readers Some advanced features of the KeyAT Adapter a...

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