duane> [I want a board test feature]
> How does those higher end tester like Agilent 3070 in circuit tester
work?
> Do they require extra add-on for JTAG related stuff like Boundary Scan?
> Do they use BDSL files? I know they can flash some MCUs but not all.
> Last time we have to use off-line programming for TMS470R1A64/A256
> since the support was not ready yet.
I think - while those systems *COULD* do flash programing - the truth is
something else. The *COST* - in machine time, makes it too expensive.
To be clear: I think big systems like the Agilent have their place, they
do all kinds of other stuff. However, I believe they all require an
expensive "bed of nails" fixture, lots of time and money for a 10 board
prototype run, or fixing a few very expensive test boards
I'm talking about basic continuity and pin drive, and ability to read a
digital value on a pin, this type of problem:
I built 10 prototype boards - and 4 do not work. What's wrong? I
don't have an XRAY machine.
These are prototypes, I don't have budget to create bed-of-nails
fixture, What are my options?
If I had a program that could take the Schematic netlist + the BSDL
files for a couple complex chips - and give me a SVF file or something
like that - to verify basic connectivity on the board - wow!
For those pins attached to a memory device - a simple memory test would
be powerful.
If I could get OpenOCD to 'wiggle' a pin - that would be great.
Imagine
(1) being able to plug OpenOCD/JTAG into the board.
(2) using some gerber view program - view the PCB
(3) Double click on a pin, or a trace with a mouse
(4) The trace starts blinking
(5) And openocd makes the trace toggle 0/1
That alone would be a powerful debug tool, no debug software to write,
no flash to program, no nothing.
-Duane.
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