SNIFFER Board for PCI-Express channelSNIFFER Board for PCI-Express channel

Final PresentationFinal Presentation

12.12.0612.12.06

Presenting: Roy MessingerPresenting: Roy Messinger

Instructor: Boaz MizrachiInstructor: Boaz Mizrachi

High speed digital systems laboratoryהמעבדה למערכות ספרתיות מהירות

הטכניון - מכון טכנולוגי לישראל

הפקולטה להנדסת חשמל

Technion - Israel institute of technologydepartment of Electrical Engineering

Goals Design and development of a printed circuit board capable Design and development of a printed circuit board capable

of sniffing to the PCI-E channel without interference to the of sniffing to the PCI-E channel without interference to the

data passing (passive listener).data passing (passive listener).

The sampled data will be sent to a different card (Virtex II The sampled data will be sent to a different card (Virtex II

pro) and will be analyzed for errors. pro) and will be analyzed for errors.

Getting knowledge in the various communication types Getting knowledge in the various communication types

implemented on board (RS232, SPI, I²C & PCI-E)implemented on board (RS232, SPI, I²C & PCI-E)

Sniffer Specification 34x34 Cross Point Switch which sniffs the PCI-E channel 34x34 Cross Point Switch which sniffs the PCI-E channel

and divert the information to the outside Xilinx Virtex II and divert the information to the outside Xilinx Virtex II

pro.pro.

PIC uController configures the Cross Point Switch (PIC uController configures the Cross Point Switch (SPI SPI

architecture)architecture)..

External computer configures the uController through External computer configures the uController through

RS232 architecture (UART).RS232 architecture (UART).

EEPROM connected to the uController for additional EEPROM connected to the uController for additional

future usage (future usage (I²C architecture)I²C architecture). .

Communication Layout

PCI-EPCI-E

SPISPI

I²CI²C

RS232RS232

Schematic overview

PCI-E Mother Board

PCI-E Graphic card

PCI-E SnifferTest

Equipment

System screen

Block Diagram

M21121 34x34

PIC uController

18F458

RESET

Power supply

3.3Vdc

2.5Vdc 3.3Vdc (ATX-optional)

Dip Switch

Prog. Connector 4MHz

Debug Leds

Virtex II pro

UART RS232 TCVR

RS232RS232

D-type connector

EEPROM 24LC16B

I²C

SPI

32+322+2 SMA

RS232

PC

I EX

PR

ES

S x16 lin

k

3.3Vdc

Status Leds

uController:

PIC 18F458 uController code was generally based upon assembly+C code of

existing Crossbar of the lab.

Changes included defining ‘sense’ pins of PCI-E and attribute them to uCont.

For debug use, etc.

uController

E²PROM

Dipswitch

34x34

Xpnt

Debug leds

Sniffing the channelOther Options examined (using 4x4 switch):

Sniffer Specification INTERFACES:INTERFACES:

I²C – uController to EEPROM.I²C – uController to EEPROM.

SPI – uController to Cross Point Switch.SPI – uController to Cross Point Switch.

RS232 – uController to UART.RS232 – uController to UART.

– – D-type to external computer.D-type to external computer.

PCI-E PCI-E – MB to graphic card, Crossbar to link– MB to graphic card, Crossbar to link

CLOCK:CLOCK:

4MHz clock oscillator for PIC uController.4MHz clock oscillator for PIC uController.

Sniffer Specification-Cont.

POWER SUPPLY:POWER SUPPLY:

3.3v – DC-DC converter from 5v to 3.3v, up to 3A3.3v – DC-DC converter from 5v to 3.3v, up to 3A

2.5v – DC-DC converter from 5v to 2.5v, up to 3A2.5v – DC-DC converter from 5v to 2.5v, up to 3A

M21121 34x34 Cross Point Switch :M21121 34x34 Cross Point Switch :

Vdd – 2.5v. Configuration and programming interface voltageVdd – 2.5v. Configuration and programming interface voltage

OptionalOptional – Vdd-3.3v. – Vdd-3.3v.

18F458 PIC uController :18F458 PIC uController :

Vdc- 3.3v interface voltageVdc- 3.3v interface voltage

Sniffer Specification-Cont. Layout Stackup:Layout Stackup:

2 mid layers are Vcc and GND for more capacitance – more filtering

Line-Space-Line width was determined using Hyperlinx ©

in order to achieve 100 Diff. Imp., 50 Single Ended Imp.

4.5 8 4.5 mil

Extreme Delicate Editing!

Sniffer Specification-Cont. INTERFACES:INTERFACES:

Interface from external computer to Sniffer through RS232 is Interface from external computer to Sniffer through RS232 is

accomplished using a VB.Net GUI based software, which send accomplished using a VB.Net GUI based software, which send

pre-defined scripts to the components on Board:pre-defined scripts to the components on Board:

Mechanical Design

Draft:Draft:

FinalFinal

Sniffer Final board:

Sniffer Debug Phase:

The crosspoint was configured in such way to shorten the input and output The crosspoint was configured in such way to shorten the input and output

SMA connector. Afterwards, a Pulse Generator and a Scope was brought to SMA connector. Afterwards, a Pulse Generator and a Scope was brought to

test the Sniffer.test the Sniffer.

Scope

Pulse Gen.

PCI-E Sniffer

‘10101010…’

‘10101010…’

Sniffer Debug Phase:

PRBS function was used in the Pulse Generator in order to see eye pattern. PRBS function was used in the Pulse Generator in order to see eye pattern.

Voltage was 0.7p-p (or +0.35V, -0.35V) according to the PCI-E spec.Voltage was 0.7p-p (or +0.35V, -0.35V) according to the PCI-E spec.

Eye diagram when Input32 (J6, J8) is switched to output32 (J3, J5), Equalization enabled

Eye diagram when Input32 (J6, J8) is switched to output32 (J3, J5), Equalization disabled

Sniffer Debug Phase:

A PCI-E X1 LAN board was connected in order to verify the crosspoint A PCI-E X1 LAN board was connected in order to verify the crosspoint

ability to transfer signals correctly.ability to transfer signals correctly.

PCI-E Sniffer

PCI-E X1 Lan card

‘10101010…’

Thanks

Many thanks to all the lab staff:Many thanks to all the lab staff: Eli ShushanEli Shushan Mony OrbachMony Orbach Ina RivkinIna Rivkin Bruria Bruria And of course:And of course:

Boaz MizrachiBoaz Mizrachi