Viewing entries tagged with 'electronics'

56800/E JTAG adaptor

Posted by Petr Hapal on 18 January 2013 | 4 Comments

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I've described tools needed for development in my last post. JTAG adaptor is one of them. There are two low cost possibilities - CodeWarrior USB TAP and LPT JTAG. The biggest "pro" for USB TAP is that USB ports are everywhere. However flashing time and debugging speed is the same as in case of LPT JTAG. In this post you will find a construction of LPT JTAG. The biggest "con" is need of hardware LPT port - this is a problem of new laptops. If you would like to buy or build USB -> LPT converter - do not try this, it doesn't work (I've tried cheap USB-LPT from ebay and USB-LPT based on AVR MCU, both not working). Only chance is probably PCI or PCMCIA card.

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