Introduction.

Workshop PG5
Instructionlist
$Instructions:
$skip
Until now we have only talked about instructions which are downloaded to the
PCD. The PCD family has a set of instructions (called directives), which can
change the way the build process is done. These directives aren’t downloaded
to the PCD at all. Here’s a short list of the most common directives:
One of these directives was already presented at the beginning of this chapter it
was : $Skip => $endskip
This directive tells the build process to skip the code between these symbols.
The code is considered as a comment.
$include
When an include statement is encountered, the given file is read and processed
as though it is part of the source file being assembled.
Format:
$INCLUDE ["][d:][path]filename[.ext]["]
SEdit can open these files for you. If you have an $include directive in your
code simply click on the statement using the right mouse button, and the specified
file will be opened for you:
$group
All symbols defined between these directives are automatically prefixed with
the group_name. This makes it easier to work with symbols which are inside
groups. To reference a symbol in a group, either the group name can be used
as a prefix to the symbol (separated by a full stop "."), or another $GROUP
directive can be used to define the default group name.
For example:
STH FRED.SYMBOL1 ; SYMBOL1 in group FRED
$GROUP FRED
; select group FRED
STH SYMBOL1 ; references FRED.SYMBOL1
$ENDGROUP
These are just a few of the available directives. Using these directives takes a
lot of experience and explaining all these techniques would go way beyond the
goal of this starter workshop. Please refer to the help for a complete list.
PG5-07-E © Saia-Burgess Controls Ltd. Page 7-15