DSP Development System Speaker: Lian-Tsung Tsai. Outline Introduction Common feature of DSP Processor TI TMS320 Development Kit Philips Trimedia Development

DSP Development System

Speaker: Lian-Tsung Tsai

Outline

Introduction Common feature of DSP Processor TI TMS320 Development Kit Philips Trimedia Development Kit

Introduction

What is DSP ? DSP(Digital signal processor) is used to manipulate

real-world signals after they have been converted into a digital form.

Introduction (cont.)

Why is DSP processor? Mathematical calculation vs. data manipulation.

Data Manipulation Math calculation

Typical Application

Word processing, Database Management,spread sheet,O.S etc..

Digital Signal processing,motion control.. Etc.

Main Operations

Data Move:(A=> B)Value testing: IF A=B then …Sorting, searching..

Addtion:A+B=CMultiplication:AxB=CSum of product..


Off-line processing The entire input signal resides in the computer as the

same time. All of the information is simultaneously available to the

processing program. Example : medical imaging, such as computed

tomography and MRI. PC and mainframes.


On-line processing The output signal is produced at the same time that the

input signal is being acquired. E.g. telephone, radar, hearing aids.

Real-time applications must be have the information immediately available,although it can be delayed by a short amount.

Real-time applications is input a sample, perform the algorithm, and output a sample, over-and-over.

This is the world of Digital Signal Processors.


The definition of real-time depends on the applications, for instance, an Audio application

Requires a sampling frequency of 40 KHz. Needing 100 serial instructions to complete and using a DSP

processor with 30 ns cycle time. Then in 3 microseconds the calculation is completed.

Sample n

Time between samples = 1/40KHz =25 microseconds

100 instructions3 microseconds Waiting time Sample n+1

Introduction (cont’d.)

What applications DSP can do? Complex system control. Multimedia processing

(Video,Audio,Speech,Image,etc.) Intelligent signal processing using soft

computing(Fuzzy inference, Neural networks, etc.)

Common feature of DSP Processor

Multiple-access Memory architecture Advance Harvard architecture to achieve separate program and dual

access data memory space. Specialized addressing modes

Circular buffer, bit-reversed addressing. Fast multiply-accumulate(MAC)

High performance interrupt handling. Single and block instructions by pipeline structure to perform one

instruction per cycle. On-chip peripherals and I/O interfaces

Multi-channels direct memory access(DMA). High performance serial and parallel I/O port. High resolution timer.

Common feature of DSP Processor (cont.)

Processor Core

Address Bus

Data Bus

Memory

Processor Core

Address Bus

Data Bus

Data Bus

Address Bus

Memory A Memory B

Von-NeumannHarvard


Advance Harvard The processor core can

simultaneously perform two access to memory bank A and one access to memory bank B using three independent sets of buses. Dual-ported data

memory. Single ported program

memory.

Processor Core

Memory A Memory B

Address Bus 1

Data Bus 1

Data Bus 2

Address Bus 2

Data Bus 3

Address Bus 3

Common feature of DSP Processor (cont.) Data address generator(DGA) for

PM and DM Circular buffers, bit-reversed

address for FFT. Data register sets

General purpose registers,special purpose registers.

Math processing units Multiplier. Arithmetic logic unit(ALU). Barrel shifter.

Program sequencer and instruction cache.

System buses.

ProgramMemory

instructions and secondary data

DataMemoryData only

I/OController

(DMA)

shifter

ALU

Multiplier

Data register

Program sequencer

Instruction cahe

Data register

Data register

High speed I/O


The difference between DSP and CPU: DSP processor is possible to do several accesses to memory in a

single instruction cycle. i.e., DSP processor have a relatively high bandwidth between their Core CPU and memory.

DSP processor are optimized to cope with repetition or looping of operations common in signal processing applications.

DSP allows specialized addressing modes, such as indirect,circular, and bit reverse addressing. These are efficient addressing mechanisms to implement many signal processing algorithms.

TI TMS320 Development Kit

VLIW architecture Very Long Instruction Word. Parallel processing with multiple function units.

TMS320C6000 family Fixed-Point C6X DSP:

TMS320C62X,TMS320C64X. Floating-Point C6X DSP:

TMS320C67X.

TI TMS320 Development Kit (cont.)

Advantages of VLIW architectures Increased performance. Better compiler targets. Potentially scalable.

Disadvantages of VLIW architectures Increased memory use. High power consumption. Misleading MIPS ratings.


C62x Fixed-PointDSP Generation

C64x Fixed-PointDSP Generation

C67x Floating-PointDSP Generation

Clock Rate(MHz)

MIPS/MFLOPS

16-bit MMACS

8-bit MMACS

BroadbandCommunications

Imaging

150-300 600-1100 150-167

1200-2400 MIPS 4800-8800 MIPS 600-1000 MFLOPS

300-600 3400-4400 300-333

300-600

General

General

4800-8800

Special-purposeInstructions

Special-purposeInstructions

300-333

General

General


EMIF

Host Port

McBSP

McBSP

Timer

Timer

Direct MemoryAccess(DMA)

Controller(4 channels)

Program Memory64K Bytes

C62X/C67XCPU

Data Memory64K Bytes

TMS320C6201/6701 DSP Block Diagram


TMS320C6201/6701 key features: Launched at 200MHz;1600 MIPS. 128 K RAM on-chip (split 64K program/64K data). 32 32-bit registers file. All instructions may be conditional. Efficient compilation of ANSI-C code. Data is byte-addressable (it can be 8-bit,16-bit or 32-

bit).


TextEdit

AssemblerOptimizer

Compiler

Assembler LinkerDebuggerSimulator

.c

.sa

.asm.obj .out

Link.cmd

.c=C source file.sa=linear assembly source file

.asm=assembly source file.obj=object file

.out=executable COFF file.cmd=linker command file


The tools for three stages: 1.Algorithms development:

Textual-based tools: C and Assembly. MATLAB with DSP toolboxes.

2.System-level design: MATLAB and simulink DSP toolboxes. RIDE or VAB rapid tool.

TI TMS320 Development Kit (cont’d.)

3.Hardware and embedded software implementation: Code Composer Studio (CCS) with developer’s kit for TI C6x

EVM. RIDE with DSP board from third-party of DSP venders. VAB with TI or third-party DSP board.

Philips Trimedia Development Kit

This is a software and hardware supported development environment. Hardware architecture

Combine A/D, D/A, Memory, ASIC, VLIW CPU to build up a multimedia development platform.

Software operation environment Support different program langrage for developer High performance compiler, scheduler, analyzer,

optimizer, even a GUI debugger.

Philips Trimedia Development Kit (cont.)

TM1300 feature: Implements popular multimedia standards such as MPEG-1 and

MPEG-2, Operations from C and C++ source code. Frequency up 166 MHz. Memory 8 MB SDRAM. Immediate, Floating-Point Compute and Multimedia

Operations. 5 operations each clock cycle.


Hardware architecture:


Hardware architecture:


Software development flow:


Software Component Software Tools


All of executable tools was stored under install_path/bin…., in our system as below


Free UNIX-like environment , and make tool is compatible with UNIX.

Cygwin tool

Trimedia GUIRunning tool

Trimedia GUI debugger


NO!! we can use MS-DOS mode to compile our program, when you put tmcc.exe or tmCC.exe in the the same directory.

Using “Bash”, Cygwin’s environment, is easy to compile and run, even debug our program.

Philips Trimedia Development Kit (cont.) Makefile example: # usage: make TCS=<path> # HOST = Win95 ENDIAN = el CC = $(TCS)/bin/tmcc -host $(HOST) -$

(ENDIAN) vivot.out: CHECK vivot.c $(CC) $(CFLAGS) -o $@ vivot.

c $(LDFLAGS) CHECK: @if [ x$(TCS) = x ]; then \ echo "Usage: make

TCS=<path>"; false; \ fi clean: rm -rf vivot.out vivot.o


Using GUI to run DSP-program


tmcc -p fdct.c -o fdct.out tmsim -ns -nomm fdct.out /* ge

nerates dtprof.out */ tmcc -r fdct.c -o fdct.out tmsim -mm -ns -statfile fdct.stat f

dct.out tmprof >fdctrpt -scale 1 -thresho

ld 0.01 -detail -func fdct.stat fdct.out

Philips Trimedia Development Kit (cont’d.)

Performance Analysis:

Documents

DSP Development System Speaker: Lian-Tsung Tsai. Outline Introduction Common feature of DSP Processor TI TMS320 Development Kit Philips Trimedia Development