SiTCP for SK1st version

Jul 13, 2006

Tomohisa Uchida, KEK

Overview

• Prepared – The Net-list file– An reference design– An reference program to control bus via UDP

• All files in 060713SK.zip

The reference design.

• Implemented on Spartan 3E Starter Kit– Produced by XILINX.

• Functions– TCP

• A test data generator and checker• Echo back server• Can be selected by a slide-SW on the board (SW3)

– UDP• Simple register file access

• I have verified it on my board !

Spartan 3E Starter Kit

Reset SW Test data generation

TCP Echo back

Structure of “060713SK” folder

• SiTCP_S3E_StarterKit– The reference design files.

• SiTCP_FOR_SK– The net-list files and related files.

• BCP– The reference program to control bus of SiTC

P via UDP.

“SiTCP_S3E_StarterKit” directory

• Includes the reference design files.• ” Coregen” directory

– Library files that are used in the design.– Generated by CORE-GENERATOR

• “ISE” directory– Working directory of ISE.– I compiled with the version 8.1.03i of ISE.

• “Src” directory– Source code files of the design.

“SiTCP_FOR_SK” directory

• Includes net-list files used to implement SiTCP.• SiTCP_FOR_SK.ngc

– Net-list file of SiTCP

• Asyncfifo8bx2kw*– Asynchronous FIFO– Used in the SiTCP

• Copy the above files to working directory of ISE.– See the reference design.

• “SiTCP_S3E_StarterKit” directory.

“Src” directory

• Consists of– S3E_SK_SITCP_FOR_SK.V

• The top module

– SiTCP_FOR_SK.V• Top module of SiTCP

– TCP_TEST.V• An simple application of TCP.• Test data generator and checker.

– LOC_REG.v• An simple application of UDP.• Register files.

“BCP” directory

• Consists of– bcp_dbg.c

• The reference program.

– bcp.h• Header file of ” bcp_dbg.c”.

TCP: Normal sequence

Establish Received FIN

Closing phase

Received SYN, ACK

Closed

Transfer phase

The signals of TCP_TEST.V

From a SYN packet is received to a FIN packet received.

Transfer phase

• TCP_ESTABLISH keeps in high level.

• Should write data to send in this phase.

• If TCP_ESTABLISH goes to low level,– The connection is disconnected (Normal).– A network error occurred (Error).

• I recommends TCP_ESTABLISH is used to initialize front-end circuits.

TCP Transmit Timing

The signals of TCP_TEST.V

Transmit Stop Timing

The signals of TCP_TEST.V

Max. 8 clocks

TCP Receive Timing

The signals of TCP_TEST.V

Max. 8 clocks

Closing Timing

Closing phase

• Started by TCP_CLS_REQ– Asserted by receiving a FIN packet.

• When TCP_CLS_REQ is asserted,– Stop to transmit data as soon as possible.– After that, response with TCP_CLS_ACK in

high level.

• When the connection is closed,– TCP_ESTABLISH goes low.

UDP

• Use an original protocol (BCP) to access bus of SiTCP.

• BCP is encapsulated in UDP packet.

• I prepare a reference program.– I wrote this for debugging.– Pease, customize it.

BCP headerPosition

in byte

Name Description

0 Ver.[3:0] /

Type [3:0]

Should be 0xFF

, means the test version.

1 Command[3:0] /

Flag [3:0]

Command

0xC = Read operation

0x8 = Write operation

Flag, valid only ACK packet

[3] = ACK packet

[2:1] = always zero

[0] = Bus error

2 ID Number to identify, any number can be used.

3 Length Length of read / write access

BCP header

Position

in byte

Name Description

4 Address [31:24] Read / Write Address

5 Address [23:16] Read / Write Address

6 Address [15: 8] Read / Write Address

7 Address [7: 0] Read / Write Address

8 Write data [7:0] 1st write data

:

7+N Write data [7:0] The last (N-th) write data

Reference programIP address of SiTCP = 192.168.0.16

UDP port of SiTCP = 4660 (0x1234)

In this example,- Read 4 bytes data from SiTCP,- Addresses are from 0x00 to 0x03.

Write timing

Read timing

SiTCP is under developing.

If you find bugs or problems, please report it to me.

Thank you.

Tomohisa Uchida, KEK (uchida@post.kek.jp)

If you have questions,Please ask me or Hayato-san.