Analog Devices TigerSHARC ADSP-TS201S Скачать руководство пользователя

Страница: 10 / 48

Rev. C

Page 10 of 48

December 2006

ADSP-TS201S

POWER DOMAINS

The ADSP-TS201S processor has separate power supply con-
nections for internal logic (V

), analog circuits (V

DD_A

), I/O

buffer (V

DD_IO

), and internal DRAM (V

DD_DRAM

) power supply.

Note that the analog (V

DD_A

) supply powers the clock generator

PLLs. To produce a stable clock, systems must provide a clean
power supply to power input V

DD_A

. Designs must pay critical

attention to bypassing the V

DD_A

supply.

FILTERING REFERENCE VOLTAGE AND CLOCKS

Figure 6

and

Figure 7

show possible circuits for filtering V

REF

and SCLK_V

REF

. These circuits provide the reference voltages

for the switching voltage reference and system clock reference.

DEVELOPMENT TOOLS

The ADSP-TS201S processor is supported with a complete set
of CROSSCORE

†

software and hardware development tools,

including Analog Devices emulators and Vi+

‡

devel-

opment environment. The same emulator hardware that
supports other TigerSHARC processors also fully emulates the
ADSP-TS201S processor.

The Vi+ 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++ run-time library that includes DSP and
mathematical functions. A key point for theses tools is C/C++
code efficiency. The compiler has been developed for efficient
translation of C/C++ code to DSP assembly. The DSP has archi-
tectural features that improve the efficiency of compiled
C/C++ code.

The Vi+ debugger has a number of important
features. Data visualization is enhanced by a plotting package
that offers a significant level of flexibility. This graphical
representation of user data enables the programmer to quickly
determine the performance of an algorithm. As algorithms grow
in complexity, this capability can have increasing significance
on the designer’s development schedule, increasing
productivity. Statistical profiling enables the programmer to
nonintrusively poll the processor as it is running the program.
This feature, unique to Vi+, 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 efficiently. 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
Vi+ 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 Vi+ IDE lets programmers define and manage
DSP software development. Its dialog boxes and property pages
let programmers configure and manage all of the TigerSHARC
processor development tools, including the color syntax high-
lighting in the Vi+ 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 Vi+ 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,

Figure 6. V

REF

Filtering Scheme

Figure 7. SCLK_V

REF

Filtering Scheme

†

CROSSCORE is a registered trademark of Analog Devices, Inc.

‡

Vi+ is a registered trademark of Analog Devices, Inc.

DD_IO

REF