Breaking News
Comments
Oldest First | Newest First | Threaded View
<<   <   Page 2 / 2
zeeglen
User Rank
Blogger
Re: JTAG
zeeglen   2/12/2014 1:39:56 AM
NO RATINGS
@David @Aubrey "We now try to document each jig as if it were a product on its own."

Agree 100%.  Someday someone (possibly the designer hirmself) will have to repair, calibrate, or duplicate the jig.  Detailed documentation on how it works is a must.


Garcia-Lasheras
User Rank
Blogger
Re: JTAG
Garcia-Lasheras   2/12/2014 4:28:25 AM
NO RATINGS
@Antedeluvian: "I should have mentioned that- maintaining old PCs and spares discontinued parts also feed into my nightmare."

About the PCs running the test software, I suppose that you are using some old version of Windows OS -- maybe Win98/XP. Am I right?

 

antedeluvian
User Rank
Blogger
Re: JTAG
antedeluvian   2/12/2014 9:20:51 AM
NO RATINGS
Javi

About the PCs running the test software, I suppose that you are using some old version of Windows OS -- maybe Win98/XP. Am I right

Actually some of it goes back to DOS, Windows 95 as well as 98 and XP.

There are 3 OS aspects:

1. Development environment- will you be able tol go back and recreate it to modify the code. Something I really hope to avoid.

2. Operation under a newer OS. Microsoft is normally quite good with backward compatibilty with the glaring exception of point 3, below

3. I/O Drivers- which is far more problematic as Microsoft scaled back first on the parallel port and then the serial port. Some USB to serial port converters work well.

A bigger problem is the changes in hardware architecture and the maintenance thereof- there is the ISA, PCI etc architectures and there is an added complexity in that sometimes you need a system to configure the hardware in situ- so make sure that all you need  (software as well) can achieve this on whatever hardware you have left if you ever need to repair/reconfigure.

Also the storage medium can be a problem especially (as Duane noted) if you have everyhthing on 5.25" disks, and you only have 3.5" dirves if you are lucky.

 

elizabethsimon
User Rank
CEO
Re: JTAG
elizabethsimon   2/12/2014 11:42:13 AM
NO RATINGS
@betajet

...The JTAG/SWD capability is more for development debugging than for production testing.

 

Which brings up the point that the test techniques and tools requried for production test are (or can be) significantly different from what is requred for development. After all by the time you get to production you presumabley have a working design and you mostly need to check that it's built right and has the right firmware and calabration values loaded if necessary.

 

tb100
User Rank
CEO
Re: JTAG
tb100   2/18/2014 1:42:25 PM
NO RATINGS
I've worked for a number of companies that use JTAG as part of the production testing for all its products. In fact I haven't worked for any company that didn't do this.

Is my experiance really unique?

Test101
User Rank
Rookie
Excellent summary
Test101   2/18/2014 2:03:52 PM
NO RATINGS
Thanks for writing this. It is a good summary, which can help prepare a checklist to test boards.

<<   <   Page 2 / 2


EE Life
Frankenstein's Fix, Teardowns, Sideshows, Design Contests, Reader Content & More
Max Maxfield

Aging Brass: Cow Poop vs. Horse Doo-Doo
Max Maxfield
7 comments
As you may recall, one of the things I want to do with the brass panels I'm using in my Inamorata Prognostication Engine is to make them look really old. Since everything is being mounted ...

EDN Staff

11 Summer Vacation Spots for Engineers
EDN Staff
11 comments
This collection of places from technology history, museums, and modern marvels is a roadmap for an engineering adventure that will take you around the world. Here are just a few spots ...

Glen Chenier

Engineers Solve Analog/Digital Problem, Invent Creative Expletives
Glen Chenier
11 comments
- An analog engineer and a digital engineer join forces, use their respective skills, and pull a few bunnies out of a hat to troubleshoot a system with which they are completely ...

Larry Desjardin

Engineers Should Study Finance: 5 Reasons Why
Larry Desjardin
45 comments
I'm a big proponent of engineers learning financial basics. Why? Because engineers are making decisions all the time, in multiple ways. Having a good financial understanding guides these ...

Flash Poll
Top Comments of the Week
Like Us on Facebook
EE Times on Twitter
EE Times Twitter Feed

Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)