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Microgate MicroGraph LED User Manual Page 66 of 88

3.1.2 AUTOCONFIG COMMANDS

The following commands allow to autoconfigure the Row and Column address of the modular

display boards, if you have not done so in the setup menu before assembling them.

The frame format to send is slightly different from the text frame. As address identifier (instead of

A..Q or blank) the character '*' must be used (Dec. 42, Hex 2Ah).

The commands are two and must be sent in sequence, waiting until the end of the execution of

the first (the first one sets the same port baud rate for all). This can be carried out visually (the

display board writes OK when it is ready to receive the second command) or by reading the

response from the serial/Ethernet port. These are in fact the only two (bidirectional) commands

giving a response and more precisely can give an ACK in case of Acknowledgement (OK command)

or an ERR in case of Error.

Initialize AutoConfig

Command code

‘a’

Data area

Item

Length (bytes)

Notes

Baud Rate

Max 6

'1200', '2400', '4800', '9600', '19200', '38400', '38400',

'57600', '115200', '230400'

Responses

ACK | ERR

Set AutoConfig Parameters

Command code

‘b’

Data area

Item

Length (bytes)

Notes

Row

0 <=n<= 15 – 0 = Automatic

Column

0 <= n <= 4 – 0 = Automatic

Direction

0=Down, 1=Up

Responses

ACK | ERR

Example:

From PC to display board

From display board to PC

ESC * a 9600 ETX CHK

* a ACK (or * a ERR)

ESC * b 00 0 1 ETX CHK

* b ACK (or * b ERR)

The Direction parameter is very important in the case of multiple-row configurations (one display

board above the other). If the serial or Ethernet cable from the PC to the display board is

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