Communications Interface; General; Led Indicators - Reach Technology SLCD+ Manual

Communications Interface

4.6.

General

Default communication is at a baud rate of 115200 with no parity, software
(XON/XOFF) flow control, 8 bits of data, and 1 stop bit. The baud rate can be set to a
different initial value on power-on by using the POWER-ON MACRO feature.
Characters are not echoed and all responses end only with a <return> character (0x0d).
This is done to maximize communications line efficiency.
ASCII commands consist of a command (one or more ASCII characters) followed by the
data associated with that command, followed by a carriage return. In this manual, the
return character (value 0x0D, decimal 13) is signified by <return>.
Screen pixel values start at the upper left-hand corner. This is point x=0, y=0. The lower
right corner is point x=319, y=239 (landscape mode).
The maximum length of any command including the termination character is 127
characters.

LED indicators

4.7.
The SLCD+ board has two LEDs to indicate operational status.
D2 is closest to the board edge. It turns on when power is applied and the microcontroller
is operating correctly. It can also be turned off and on via the SET LED command.
D1 is lit while the SLCD+ is executing a command or running a looping macro. It is useful
to determine the activity level of the SLCD+.
SLCD+ Controller Manual V1.1 8/14/2009 Page 22