Ldf File Overview - Analog Devices VisualDSP++ 3.5 Manual

LDF File Overview

The file directs the linker by mapping code or data to specific mem-
.LDF
ory segments. The linker maps program code (and data) within the system
memory and processor(s), and assigns an address to every symbol, where:
symbol = label
symbol = function_name
symbol = variable_name
If you neither write an .
VisualDSP++ links the code using a default .
. file is determined by the processor specified in the VisualDSP++ envi-
LDF
ronment's Project Options dialog box. Default
with your processor tool distribution kit in a subdirectory specific to your
target processor's family. One default .
sor supported by your VisualDSP++ installation.
You can use an
existing LDF (or a default .
there are no large changes in your system's hardware or software. See
"Example 1 – Basic .LDF File for Blackfin
.LDF File for ADSP-218/9x
Examples"for basic information on LDF structure.
The file combines information, directing the linker to place input
.LDF
sections in an executable file according to the memory available in the
DSP system.
The linker may output warning messages and error messages. You
must resolve the error messages to enable the linker to produce
valid output. See
page 2-10
VisualDSP++ 3.5 Linker and Utilities Manual
for 16-Bit Processors
file nor import an .
LDF
file written from scratch. However, modifying an
.LDF
file) is often the easier alternative when
LDF
DSPs", and
"Linker Warning and Error Messages" on
for more information.
Linker Description File
file into your project,
LDF
file. The chosen default
LDF
files are packaged
.LDF
file is provided for each proces-
LDF
Processors", "Example 2 - Basic
"Notes on Basic .LDF File
3-3