Breaking News
Design How-To

Empowering your hardware engineers

8/5/2012 06:36 PM EDT
12 comments
NO RATINGS
More Related Links
View Comments: Newest First | Oldest First | Threaded View
Page 1 / 2   >   >>
Bob_Kozio
User Rank
Rookie
re: Empowering your hardware engineers
Bob_Kozio   8/8/2012 4:24:18 PM
NO RATINGS
U-Boot, Linux and VTOS all require at least the processor and some memory to be operational. On a new prototype board, structural before functional is the approach. JTAG Boundary Scan, checking power rails, clocks, etc. for structural integrity checking. After that, VTOS is JTAG or U-Boot loadable. Another option is to try multiple prototype boards. A recent experience had 4 out of 24 prototype boards with assembly problems ( not design problems).

Bob_Kozio
User Rank
Rookie
re: Empowering your hardware engineers
Bob_Kozio   8/8/2012 4:11:14 PM
NO RATINGS
Agreed. Structural Test ( JTAG boundary scan ) and functional test (VTOS) are very complementary. Neither is a significant investment. Together they provide the visibility/test coverage needed to measure and verify design quality. That these tools can be applied in many roles ( design verification, production readiness testing, production test, bone yard testing, NPI testing, regression testing on second source parts, etc). This goes way beyond board bring-up. In many cases, deploying best practice tools require a hair-on-fire situation to get people’s attention.

Max The Magnificent
User Rank
Blogger
re: Empowering your hardware engineers
Max The Magnificent   8/8/2012 3:07:35 PM
NO RATINGS
Rose colored? :-)

I_B_GREEN
User Rank
Rookie
re: Empowering your hardware engineers
I_B_GREEN   8/8/2012 3:04:48 PM
NO RATINGS
Its the corperate blinders that get handed out about this time in the project.

I_B_GREEN
User Rank
Rookie
re: Empowering your hardware engineers
I_B_GREEN   8/8/2012 3:02:41 PM
NO RATINGS
Bob and Dan, I guess that is where Kozio comes in right?

I_B_GREEN
User Rank
Rookie
re: Empowering your hardware engineers
I_B_GREEN   8/8/2012 3:01:03 PM
NO RATINGS
All the new parts come with rules not timing equations. You follow the rules and trust the silicoln engineers didn't scew you. That all that is available to small outfits that can't afford the expensive EDA verification seats.

VNP
User Rank
Rookie
re: Empowering your hardware engineers
VNP   8/8/2012 1:24:04 PM
NO RATINGS
Let's image you have received an assembled module (month ago I was in that position). And you cannot upload OS. It does not matter, VTOS or Linux. Well, what is your plan B?

an_m
User Rank
Rookie
re: Empowering your hardware engineers
an_m   8/8/2012 10:04:48 AM
NO RATINGS
Hardware visability has always been a key point in testign and verifying. Yet even the basic tools, such as JTAG coverage, to prove the bits are soldered on properly is a little seen tool. Let alone the ability of JTAG to stimulate your design before any other FPGA / Processor code is written. Engineers in my experience have not been able to convince management to spend on such in my view essential tools. Management like much bigger tool systems like this... sadly in my opinion. As an example, I have seen boards that start failing after months in the field, which had had all sorts of normal testing on them. Turned out that a pull up resistor ( 0402 ) had never been fitted, and luckily ( un luckily ) the system had passed till then. cost them a fortune. They now have and use JTAG. don't let your company go down that route. invest in the small tools first, then once they are in place and working, look at the big tools. please.

afarendt
User Rank
Rookie
re: Empowering your hardware engineers
afarendt   8/6/2012 5:15:49 PM
NO RATINGS
A tool that gives the engineer better visibility into how the hardware is functioning plus easier test control will also speed up the development process.

Bob_Kozio
User Rank
Rookie
re: Empowering your hardware engineers
Bob_Kozio   8/6/2012 4:57:30 PM
NO RATINGS
I completely agree that hardware teams are under pressure to get the OS running as quickly as they can on new prototype hardware so application development can begin. If the VTOS is ready when the prototype hardware arrives more working prototype boards can be delivered to software faster than with current methods. The hardware quality and performance will also be better understood. Having the right process and tools makes all the difference.

Page 1 / 2   >   >>
Flash Poll
Radio
LATEST ARCHIVED BROADCAST
EE Times editor Junko Yoshida grills two executives --Rick Walker, senior product marketing manager for IoT and home automation for CSR, and Jim Reich, CTO and co-founder at Palatehome.
Like Us on Facebook

Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)
EE Times on Twitter
EE Times Twitter Feed
Top Comments of the Week