User`s guide

What is MPLAB
®
IDE?
© 2006 Microchip Technology Inc. DS51519B-page 15
1.3 PROJECT MANAGER
The project manager organizes the files to be edited and other associated files so they
can be sent to the language tools for assembly or compilation, and ultimately to a linker.
The linker has the task of placing the object code fragments from the assembler, com-
piler and libraries into the proper memory areas of the embedded controller, and ensure
that the modules function with each other (or are “linked”). This entire operation from
assembly and compilation through the link process is called a project “build”. From the
MPLAB IDE project manager, properties of the language tools can be invoked differ-
ently for each file, if desired, and a build process integrates all of the language tools
operations.
FIGURE 1-6: MPLAB
®
IDE PROJECT MANAGER
The source files are text files that are written conforming to the rules of the assembler
or compiler. The assembler and compiler convert them into intermediate modules of
machine code and placeholders for references to functions and data storage. The
linker resolves these placeholders and combines all the modules into a file of execut-
able machine code. The linker also produces a debug file which allows MPLAB IDE to
relate the executing machine codes back to the source files.
A text editor is used to write the code. It is not a normal text editor, but an editor specif-
ically designed for writing code for Microchip MCUs. It recognizes the constructs in the
text and uses color coding to identify various elements, such as instruction mnemonics,
C language constructs and comments. The editor supports operations commonly used
in writing source code, such as finding matching braces in C, commenting and un-com-
menting out blocks of code, finding text in multiple files and adding special bookmarks.
After the code is written, the editor works with the other tools to display code execution
in the debugger. Breakpoints can be set in the editor, and the values of variables can
be inspected by hovering the mouse pointer over the variable name. Names of
variables can be dragged from source text windows and then dropped into a Watch
window.
MPLAB IDE
Project
Manager
Individual
Build
Options
Linker
Script
Linker
Debug
File
Executable
File
Assembler
Compiler
Source
Files
Object
File
Libraries