Page 236 - Programming Microcontrollers in C

Header File 221

EXERCISES
1. Write a header file that contains definitions of all vectors shown on
page 3 of the HC11 E Series Programming Reference Guide,
M68HC11ERG/AD found on the CD-ROM. This file should be in­
cluded with any program that is intended to make use of interrupts.
2. Create a small program that uses the function vector(a,b).
Compile the function and observe the assembly language code gen­
erated to accomplish this operation.

The Cosmic Compiler

The Cosmic compiler was originally known as the Whitesmiths
compiler. Cosmic retained the maintenance contract on this com­
piler through a couple of corporate owners, and now has the rights to
the compiler. This compiler used for the MC68HC11 family is some­
what more complicated to use than the ByteCraft compiler used with
the C68HC05. The compiler should be installed using the install pro­
gram that comes with it. You should allow the compiler to modify
your autoexec.bat and config.sys files unless you plan to do it your­
self. The system path should contain the path to the bin directory in
the directory that contains the compiler. There are also two set com­
mands that should be inserted into the autoexec.bat file. These
changes, once completed, will make compilation of programs rather
easy. This compiler creates an intermediate assembly language pro­
gram that must be assembled. The result of the assembly is a
relocatable object module. This module must be linked with other
modules of the program and basic library modules to comprise the
final program. The linking phase of the compilation places all of the
parts of the program in their proper memory location.
Fortunately, the compiler can make use of command files to
control the compilation sequence. These files relieve the programmer
of the need to remember the dozens of little details that must go into
each compilation. We will start with the highest level of the command
files and work down into the lower levels. The basic command file to
compile a program and create an S Record version of the program
is as follows: