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Rediscovering the Wonder of JTAG

Alan Sguigna

June 30, 2019
4:22 pm

JTAG is coming up on its 30th anniversary. And some would say it’s older than that. As I prepared for doing an introductory presentation on this amazing technology, I got a chance to reflect on how useful it has become, and what the next 30 years might be like.

The MinnowBoard Chronicles Episode 45: Back to UEFI Debug

Alan Sguigna

June 23, 2019
5:03 pm

Do you know how it feels when you have an itch, and you just have to scratch it? Well, after an extended hiatus from writing, I felt an overwhelming compulsion to do another MinnowBoard image build with source and symbols, do some more exploring, and then blog about it.

JTAG Testing of the i.MX6 SABRE Lite Board

Alan Sguigna

April 22, 2019
6:08 am

ASSET recently released an enhanced product for testing i.MX6-based board designs using JTAG. I fired up this new tool on the Boundary Devices SABRE Lite board, with some fun and interesting results.

The MinnowBoard Chronicles Episode 44: Linux Kernel Source-Level and Symbolic Debug

Alan Sguigna

March 31, 2019
10:56 am

Eureka again! I finally figured out how to use Yocto to build a Linux kernel with all of the symbolic debug information, so that I can see all of the source code and symbols within SourcePoint.

Unboxing Boundary-Scan Test Part 4: Detecting Fault Injection with SPV

Alan Sguigna

March 3, 2019
4:41 pm

In Part 3 of this series, I looked at the JTAG scan path of the ASSET ScanLite demo board, and explored some of the fundamentals of IEEE 1149.1. This week, I do some fault insertion on the scan path, and see how that is detected by boundary scan.

Unboxing Boundary-Scan Test Part 3: More on Scan Path Verify

Alan Sguigna

February 10, 2019
2:13 pm

In the last blog, I explored the JTAG scan path of the ScanLite demonstration board. In this article, I do a deeper dive into what options are available within ScanWorks to verify the scan path, and explore some of the underlying technology of IEEE 1149.1.

The MinnowBoard Chronicles Episode 43: Exploring the Linux Kernel with SourcePoint

Alan Sguigna

January 27, 2019
10:48 am

I keep taking detours! This week, I built a Linux debug image, and looked at kernel source and symbols using SourcePoint, our JTAG-based hardware-assisted debugger.

The MinnowBoard Chronicles Episode 42: Hacking the Linux Kernel, Part 3

Alan Sguigna

January 13, 2019
2:54 pm

In Episode 41, Hacking the Linux Kernel, Part 2, I successfully hacked the Linux kernel, both on a native Linux partition, and within a Ubuntu VM on VirtualBox, by using the general directions within the Linux Newbies First Kernel Patch tutorial. This week, I worked towards hacking the Linux kernel using a Yocto-based qemux86 on VirtualBox, as a final step towards actually hacking the kernel on my MinnowBoard.

Unboxing Boundary-Scan Test Part 2: Scan Path Verify

Alan Sguigna

January 6, 2019
2:24 pm

This week, I looked at some of the main test actions that apply to the ScanLite board: in particular, the Scan Path Verify action.

The MinnowBoard Chronicles Episode 41: Hacking the Kernel, Part 2

Alan Sguigna

December 23, 2018
4:17 pm

Rejoice, Linux kernel newbies. Last week, I hacked an Ethernet driver in the Linux kernel, but the hack didn’t work; it turns out that the driver I chose isn’t used in my native Linux image on my PC. This week, I tackled the problem again, with success! And if I can do it, you can, too.

Rediscovering the Wonder of JTAG

The MinnowBoard Chronicles Episode 45: Back to UEFI Debug

JTAG Testing of the i.MX6 SABRE Lite Board

The MinnowBoard Chronicles Episode 44: Linux Kernel Source-Level and Symbolic Debug

Unboxing Boundary-Scan Test Part 4: Detecting Fault Injection with SPV

Unboxing Boundary-Scan Test Part 3: More on Scan Path Verify

The MinnowBoard Chronicles Episode 43: Exploring the Linux Kernel with SourcePoint

The MinnowBoard Chronicles Episode 42: Hacking the Linux Kernel, Part 3

Unboxing Boundary-Scan Test Part 2: Scan Path Verify

The MinnowBoard Chronicles Episode 41: Hacking the Kernel, Part 2

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