ADSP-21267 Datasheet, PDF (8/44 Pages) Analog Devices – Preliminary Technical Data

ADSP-21267
PRELIMINARY TECHNICAL DATA
the ROM of the ADSP-21267. SIMD optimized libraries con-
sume less processing resources, which results in more available
processing power for custom proprietary features.
The non-volatile memory of the ADSP-21267 can be configured
to contain a combination of PCM 96 KHz, Dolby Digital, Dolby
Digital EX2, Dolby Pro Logic IIx, DTS 5.1, DTS Matrix 6.1, DTS
Discrete 6.1, DTS Neo:6, and MPEG2 2 channel.
Multiple S/PDIF and analog I/Os are provided to maximize end
system flexibility.
The ADSP-21267 is supported with a complete set of
CROSSCORE™ software and hardware development tools,
including Analog Devices emulators and VisualDSP++™ devel-
opment environment. The same emulator hardware that
supports other SHARC processors also fully emulates the
ADSP-21267.
The VisualDSP++ project management environment lets pro-
grammers develop and debug an application. This environment
includes an easy to use assembler (which is based on an alge-
braic syntax), an archiver (librarian/library builder), a linker, a
loader, a cycle-accurate instruction-level simulator, a C/C++
compiler, and a C/C++ runtime library that includes DSP and
mathematical functions. A key point for these tools is C/C++
code efficiency. The compiler has been developed for efficient
translation of C/C++ code to DSP assembly. The SHARC has
architectural features that improve the efficiency of compiled
C/C++ code.
The VisualDSP++ debugger has a number of important fea-
tures. Data visualization is enhanced by a plotting package that
offers a significant level of flexibility. This graphical representa-
tion of user data enables the programmer to quickly determine
the performance of an algorithm. As algorithms grow in com-
plexity, this capability can have increasing significance on the
designer’s development schedule, increasing productivity. Sta-
tistical profiling enables the programmer to non intrusively poll
the processor as it is running the program. This feature, unique
to VisualDSP++, enables the software developer to passively
gather important code execution metrics without interrupting
the real-time characteristics of the program. Essentially, the
developer can identify bottlenecks in software quickly and effi-
ciently. By using the profiler, the programmer can focus on
those areas in the program that impact performance and take
corrective action.
Debugging both C/C++ and assembly programs with the
VisualDSP++ debugger, programmers can:
• View mixed C/C++ and assembly code (interleaved source
and object information)
• Insert breakpoints
• Set conditional breakpoints on registers, memory,
and stacks
• Trace instruction execution
• Perform linear or statistical profiling of program execution
• Fill, dump, and graphically plot the contents of memory
• Perform source level debugging
• Create custom debugger windows
The VisualDSP++ IDDE lets programmers define and manage
DSP software development. Its dialog boxes and property pages
let programmers configure and manage all of the SHARC devel-
opment tools, including the color syntax highlighting in the
VisualDSP++ editor. This capability permits programmers to:
• Control how the development tools process inputs and
generate outputs
• Maintain a one-to-one correspondence with the tool’s
command line switches
The VisualDSP++ Kernel (VDK) incorporates scheduling and
resource management tailored specifically to address the mem-
ory and timing constraints of DSP programming. These
capabilities enable engineers to develop code more effectively,
eliminating the need to start from the very beginning, when
developing new application code. The VDK features include
Threads, Critical and Unscheduled regions, Semaphores,
Events, and Device flags. The VDK also supports Priority-based,
Preemptive, Cooperative, and Time-Sliced scheduling
approaches. In addition, the VDK was designed to be scalable. If
the application does not use a specific feature, the support code
for that feature is excluded from the target system.
Because the VDK is a library, a developer can decide whether to
use it or not. The VDK is integrated into the VisualDSP++
development environment, but can also be used via standard
command line tools. When the VDK is used, the development
environment assists the developer with many error-prone tasks
and assists in managing system resources, automating the gen-
eration of various VDK based objects, and visualizing the
system state, when debugging an application that uses the VDK.
VisualDSP++ Component Software Engineering (VCSE) is
Analog Devices technology for creating, using, and reusing soft-
ware components (independent modules of substantial
functionality) to quickly and reliably assemble software applica-
tions. Download components from the Web and drop them into
the application. Publish component archives from within Visu-
alDSP++. VCSE supports component implementation in
C/C++ or assembly language.
Use the Expert Linker to visually manipulate the placement of
code and data on the embedded system. View memory utiliza-
tion in a color-coded graphical form, easily move code and data
to different areas of the DSP or external memory with the drag
of the mouse, examine run time stack and heap usage. The
Expert Linker is fully compatible with existing Linker Definition
File (LDF), allowing the developer to move between the graphi-
cal and textual environments.
In addition to the software and hardware development tools
available from Analog Devices, third parties provide a wide
range of tools supporting the SHARC processor family. Hard-
ware tools include SHARC processor PC plug-in cards. Third
party software tools include DSP libraries, real-time operating
systems, and block diagram design tools.
Rev. PrA | Page 8 of 44 | January 2004