Specifications

Touch Controllers Reference Guide20
Communicating with the Controller
This section provides information on sending firmware commands to
and receiving commands from the MicroTouch controller.
Commands to the controller are provided on signal Receive Data
(RXD) as a serial data stream. Responses are data sent from the
controller to the host system in response to the commands received by
the controller. Controller responses to the host system are provided
on signal Transmit Data (TXD) as a serial data stream.
Sending Commands to the Controller
When you send a command to the controller, you must use the correct
command format. The general format of a command is as follows:
<Header>Command<Terminator>
Note:
The following descriptions of header, command, and terminator,
use MicroTouch’s terminal emulator key sequences. You may need to
enter the sequence in a different format, depending on your emulator.
The header is the first character in the command string and is the
ASCII start-of-header character <SOH>. The ASCII <SOH>
character is equivalent to 01 hexadecimal. To start the command
sequence, use the key sequence Ctrl A (^A).
The command, which always follows the header, consists of ASCII
uppercase letters and numbers.
The terminator is the last character of each command string and is an
ASCII carriage return <CR>. An ASCII <CR> character is equivalent
to 0D hexadecimal. To end the command sequence, use Enter or the
key sequence Ctrl M (^M).
This chapter lists each command as a string of ASCII characters
consisting of a header, the command, and a terminator as follows:
<SOH>Command<CR>