JTAG and Multi-ICE

SOC Consortium Course Material

JTAG and Multi-ICEJTAG and Multi-ICE

National Taiwan University

Adopted from National Taiwan University

SOC Course Material

2SOC Consortium Course Material

Outline

ARM debug ArchitectureContent of JTAGMulti-ICE Arch.


ARM debug Arch.(I)

AXD can debug design through:– ARMulator (software)– Multi-ICE (hardware)– Angel (hardware)


ARM debug Arch.(II)

ARMulator– Processor core model

• Handles all communication with the debugger

– Memory interface• Transfers data between the ARM model and the memory model

– Coprocessor interface• Can be used to simulate attached ARM-style coprocessors (such as

floating point accelerators or custom DSPs)

– Operating system interface• It is called whenever the ARM executes a SWI instruction, so you can

simulate the operating system in C without having to write any ARM code.


ARM debug Arch.(III)

Multi-ICE– The solution for ARMulator limits

– Can emulate custom logic

– Use hardware to emulate truly results

– Extended from JTAG Architecture


Outline



JTAG Arch.

Serial scan path from one cell to another


JTAG principle(I)

Core logic

Device ID reg

Instruction reg

Bypass reg

TAP controller

out

I/O

TDOTDI

TMS

TCK

TRST

enable

in

In enable


JTAG Principle(II)

JTAG Signals– TRST Test reset signal

– TDI Test data in– TMS Test mode select– TCK Test clock– TDO Test data out


Outline



Multi-ICE(I)


Multi-ICE(II)

Debugging software can be run on different computer through Network.


The portmap application

To support network connections, an additional application must be running on the windows workstation that runs the The multi-ICE server.

the portmapper allows software on other computers on the network to locate the multi-ICE server.


Reference Topic & Related Documents

Multi-ICE [DUI_0048F_MICE2_2_UG] AXD and armsd Debuggers Guide

[DUI_0066D_AXDDG_2_UG ] Getting Started Guide [DUI_0064D_GSG_UG ]


Experiment Requirements (1/3)

Write an ID checking engine and a front–end interface. Requirements:

– The front-end interface can accept up to 64 entries of ID in each round.

– The program runs continuously round by round.

User input:– The amount of ID to be checked.

– The ID numbers.

Program output:– The ID number.

– Check result.



Example:

(start of round)

How many IDs to check: 2

Enter ID #1: A123456789

Enter ID #2: B987654321

=== check result ===

A123456789 valid

B987654321 invalid

(end of round)



ID Checking Rules:ID number comes in a 10-digit set. The ID starts with an

alphabet, followed by 9 digits of numeral.Checking the first numeral, it should be either “1” or “2”.Setting some constrains to select valid IDs.

Recording the total memory and cycle requirements.Constructing a profile to analysis the time percentage of

each function in your code.