I'm not surprised that you didn't find much in CPAN. JTAG is a bit machine level for the usual application domain for Perl.
You may find what you need at JTAG Tools on sourceforge. Wikipedia's JTAG article has a bunch of links that may help too.
DWIM is Perl's answer to Gödel
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Thank you for the reply. I have already looked at JTAG Tools and found it to be way too much. There is functionality there that I simply do not need or want, which makes the code quite complex.
On the bright side, after some more scrupulous googling, I found a website by somebody called Toby Deitrich who has implemented pretty much what I was looking for only via a parallel port. It should now be pretty easy to change the four parallel port references to my special I/O.
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Hi, Toby here. I have written a Perl module to drive a PC parallel port to do JTAG instruction register and data register shifts, among other things. This is what I have posted on my website. However, it's pretty slow (maybe 10kbs) owing to the slow speed of the parallel port.
I have also written another Perl module which drives an <a href="http://www.amontec.com>Amontec JTAGKey which is a USB-based device and therefore much faster. If you're interested in something like that, I can give you the Perl module for that too.
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