ADSP-BF537 데이터 시트보기 (PDF) - Analog Devices

부품명

상세내역

제조사

ADSP-BF537

Blackfin® Embedded Processor

Analog Devices 

ADSP-BF534/ADSP-BF536/ADSP-BF537

programmer to use many of the processor core resources in a

single instruction. Coupled with many features more often seen

on microcontrollers, this instruction set is very efficient when

compiling C and C++ source code. In addition, the architecture

supports both user (algorithm/application code) and supervisor

(O/S kernel, device drivers, debuggers, ISRs) modes of opera-

tion, allowing multiple levels of access to core processor

resources.

The assembly language, which takes advantage of the proces-

sor’s unique architecture, offers the following advantages:

• Seamlessly integrated DSP/MCU features are optimized for

both 8-bit and 16-bit operations.

• A multi-issue load/store modified-Harvard architecture,

which supports two 16-bit MAC or four 8-bit ALU + two

load/store + two pointer updates per cycle.

• All registers, I/O, and memory are mapped into a unified

4G byte memory space, providing a simplified program-

ming model.

• Microcontroller features, such as arbitrary bit and bit-field

manipulation, insertion, and extraction; integer operations

on 8-, 16-, and 32-bit data-types; and separate user and

supervisor stack pointers.

• Code density enhancements, which include intermixing of

16-bit and 32-bit instructions (no mode switching, no code

segregation). Frequently used instructions are encoded

in 16 bits.

DEVELOPMENT TOOLS

The Blackfin is supported with a complete set of

CROSSCORE®† software and hardware development tools,

including Analog Devices emulators and the VisualDSP++®‡

development environment. The same emulator hardware that

supports other Analog Devices processors also fully emulates

the Blackfin.

The VisualDSP++ project management environment lets pro-

grammers develop and debug an application. This environment

includes an easy to use assembler that is based on an algebraic

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 mathemati-

cal 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 Blackfin assembly. The Blackfin

processor 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

† CROSSCORE is a registered trademark of Analog Devices, Inc.

‡ VisualDSP++ is a registered trademark of Analog Devices, Inc.

designer’s development schedule, increasing productivity. Sta-

tistical profiling enables the programmer to nonintrusively 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++ IDE lets programmers define and manage

software development. Its dialog boxes and property pages let

programmers configure and manage all development tools,

including color syntax highlighting in the VisualDSP++ editor.

These capabilities permit 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 embedded, real-time

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, pre-emptive, cooperative, and time-sliced sched-

uling 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 with 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.

Rev. B | Page 17 of 68 | July 2006

Share Link: