Final PresentationFinal Presentation

Implementation of DSP Algorithm on SoC

Student : Einat TevelStudent : Einat Tevel

Supervisor : Isaschar WalterSupervisor : Isaschar Walter

Accompanying engineer : Emilia Burlak Accompanying engineer : Emilia Burlak

The project is conducted withThe project is conducted with

cooperation of Rafael. cooperation of Rafael.

winter 2003/2004winter 2003/2004

Project Goals - ReviewProject Goals - Review Studying and investigating the architecture of Studying and investigating the architecture of

System on Programmable Chip (SoC).System on Programmable Chip (SoC). Deciding on the Software/Hardware partition to Deciding on the Software/Hardware partition to

be implemented.be implemented. Implementing a signal processing algorithm on Implementing a signal processing algorithm on

the chosen platform.the chosen platform.Second Semester:Second Semester:

Implementing a signal processing Implementing a signal processing algorithm based on a FIR/IIR Filter with algorithm based on a FIR/IIR Filter with Programmable parameters.Programmable parameters.• Simulating and checking the code of the Simulating and checking the code of the

algorithm in hardware and software. algorithm in hardware and software. • Running the algorithm on the board.Running the algorithm on the board.

Project ScheduleProject ScheduleSecond SemesterSecond Semester

Defining the algorithm - CIC Defining the algorithm - CIC Filters.Filters.

Design - Block Scheme.Design - Block Scheme.

Hardware.Hardware.

Software.Software.

Verification.Verification.

CIC Filters CIC Filters Overview Overview

Cascaded Integrator-Comb Filters.Cascaded Integrator-Comb Filters. Multirate filters used for realizing Multirate filters used for realizing

large sample rate changes in digital large sample rate changes in digital systems.systems.

Multiplierless structures, consists only Multiplierless structures, consists only of: Adders, Subtractors and of: Adders, Subtractors and Registers. Registers.

Decimation.Decimation. Interpolation.Interpolation.

CIC Filters CIC Filters Structure Structure

Cascade of Integrators.Cascade of Integrators. Resampling Switch (decimate/expansion).Resampling Switch (decimate/expansion). Cascade of Differentiators. Cascade of Differentiators.

CIC FiltersCIC Filters Parameters Parameters

Number of Stages (N).Number of Stages (N). Rate Change Factor (R).Rate Change Factor (R). Differential Delay (M).Differential Delay (M).

CIC FiltersCIC Filters Hardware/Software Hardware/Software

Hardware:Hardware: Generic implementation of Decimator.Generic implementation of Decimator. Generic implementation of Interpolator.Generic implementation of Interpolator.

Software:Software: Filter parameters : N, R, M.Filter parameters : N, R, M. Filter Mux Select : Dec/Int.Filter Mux Select : Dec/Int. Data input for filtering.Data input for filtering.

All wrapped into one in SoC.All wrapped into one in SoC.

DesignDesignSystem ComponentsSystem Components

plb2opbbridge

O PB C ICFilters

OPB

UARTSDRAM

G PIO(LEDs)

PLB

PPC 405

Monitor

UARTUART

send/receive send/receive files.files.

PPC405 PPC405

Software.Software. OPB CIC Filters OPB CIC Filters

Hardware Core.Hardware Core. LEDs.LEDs. SDRAM.SDRAM.

DesignDesignSystem FlowSystem Flow

plb2opbbridge

O PB C ICFilters

OPB

UARTSDRAM

G PIO(LEDs)

PLB

PPC 405

Monitor

- Receiving file from Receiving file from PC.PC.

- File read and File read and analyzed.analyzed.

- Sending parameters Sending parameters and data to filters.and data to filters.

- Receiving processed Receiving processed data from filters.data from filters.

- Sending data to PC.Sending data to PC.

DesignDesignBlock Scheme - TopBlock Scheme - Top

- OPB SW-HW IntfcOPB SW-HW IntfcGenericGeneric SW-HW SW-HW

interface.interface.

- CIC FiltersCIC FiltersImplementation of Implementation of

the CIC Filters the CIC Filters modules.modules.

OPB

O PB SW -HW

Intfc.

Data

Addr CICFilters

Block Scheme Block Scheme OPB SW-HW IntfcOPB SW-HW Intfc

Using Using IPIF (IP Interface): a portable, pre-designed bus interface, that takes care of the bus interface signals, bus protocol and other interface issues.

Data

Addr

IP IF SW -HWIntfc

rd

wr

Data

Addr

Block Scheme Block Scheme SW-HW IntfcSW-HW Intfc

Consists of:Consists of:• Address Decoder.Address Decoder.• FIFOs.FIFOs.• Control/Status Control/Status

Regs.Regs.• Other signals:Other signals:

• sw_rstsw_rst• paramsparams

Data

FIFO IN

FIFO OUT

fifo_in_dout

fifo_out_din

Control Reg.

AddressDecoder

Status Reg.

Data

fifo_in_en

start

finish

control_reg_valid

fifo_in_rd_en

fifo_out_wr_en

wr

rd m ux_select

finish_en

sw_rst

S tages_num

Sam ples_rateDiff_delay

addr

Block Scheme Block Scheme CIC FiltersCIC Filters

Consists of:Consists of:• CIC CIC

Decimator.Decimator.• CIC CIC

Interpolator.Interpolator.• CIC Filters CIC Filters

Intfc.Intfc.

C IC _D E C

C ICFilte rsIn tfc.

C IC _IN T

start

finish

fifo_in_dout

m ux_select

fifo_in_rd_en

m ux_select_en

fifo_out_din

fifo_out_wr_en

filter_Din_en

filter_Din

m ux_Select

filter_Dout

filter_Dout_en

sw_rst

filter_param s (x3)

HardwareHardware

Code written in VHDL :Code written in VHDL :• Generic CIC Filters: Decimator, Generic CIC Filters: Decimator,

Interpolator.Interpolator.• Interfaces: SW-HW intfc, Filters Intfc.Interfaces: SW-HW intfc, Filters Intfc.

Using “user core reference design” to Using “user core reference design” to instantiate the IPIF and attach it to the logic.

FIFO - generated core from CoreGen. Simulation – Using Modelsim.

SoftwareSoftwareFlow ChartFlow Chart

Receive Params from PC

Send Params to

Core

Send START to

Core

Wait for FINISH from Core

Send Data from Core

to PC

Wait for Input file from PC

SoftwareSoftwareCodeCode

Code written in C :Code written in C :• Check_leds function : counting using LEDs.Check_leds function : counting using LEDs.• Check_sdram function : Memory read/write.Check_sdram function : Memory read/write.• CIC function: previous flow chart in a while CIC function: previous flow chart in a while

loop.loop. Frequently used commands:

• XUartLite_RecvByte(uart_base_addr);• XIo_Out32(cic_base_addr, control_reg);• XIo_In32(cic_base_addr+20);

VerificationVerification

Simulation of the CIC Algorithm in Simulation of the CIC Algorithm in MATLAB:MATLAB:• data_out = dec_param(data_in, N ,R ,M)data_out = dec_param(data_in, N ,R ,M)• data_out = int_param(data_in, N ,R ,M)data_out = int_param(data_in, N ,R ,M)

The system’s output was compared to The system’s output was compared to the MATLAB’s output using various the MATLAB’s output using various inputs and parameters.inputs and parameters.

MATLAB GUI.MATLAB GUI.

GUIGUI

Filter Param

s

Files

Results

GUI GUI FeaturesFeatures

Filter Type, N, M, R, chosen by user.Filter Type, N, M, R, chosen by user. Data input file specified by user.Data input file specified by user. HW input filename specified by user.HW input filename specified by user. Creates HW input file to be run by user.Creates HW input file to be run by user. HW output filename specified by user.HW output filename specified by user. Runs SW simulation.Runs SW simulation. Compares and shows results using Compares and shows results using

graph.graph.

Hardware InterfaceHardware Interface

INPUT: INPUT: Receives file via UART using Hyper-Receives file via UART using Hyper-Terminal.Terminal.• The file contains the data in the right format The file contains the data in the right format

for the HW. The file can be created using the for the HW. The file can be created using the GUI.GUI.

OUTPUT:OUTPUT:Sends the results via UART using Hyper-Sends the results via UART using Hyper-Terminal.Terminal.• The results are captured into file.The results are captured into file.

The file can be read using the GUI.The file can be read using the GUI.

Hyper TerminalHyper Terminal

Conclusions and Conclusions and RemarksRemarks..

SoC is a powerful platform for SoC is a powerful platform for integrating Hardware and Software.integrating Hardware and Software.

Still new and therefore encountered Still new and therefore encountered some problems.some problems.

Thank YouThank You