Logic Anayzer
Logic Anayzer
Logic analyzers are a handy tool. Lets discuss them a bit here. There are many options with many features at various price points.
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Re: Logic Anayzer
http://www.ebay.com/itm/USB-Cable-24MHz-8Channel-24M-Logic-Analyzer-Device-Set-Dupont-Flux-Workshop-EG-/221876446754 is my choice
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Re: Logic Anayzer
Those are a reasonably good choice, but have some limitations. I forget the voltage levels that will trip those device to register a 1 instead of a 0. I seem to recall it was around 1.5V, but many physical devices will trip at closer to 3V. This could mean that he LA claims a 1, while the MCU think's it a 0. One device that appears to have a programmable trip point is this device.
http://www.eevblog.com/forum/testgear/hantek-ht4032l-logic-analyser/15/
That appears to allow you to program your tip point to match your MCU, which can prevent some nasty potential issues. However it seems that they haven't spent the time on the software, so the PC soft seems to be lacking. As well the ht4032 has a bunch of on board RAM which is handy for high speed captures. The Logic knock off is limited in speed by the USB port. Which means you can't capture the USB port signals, but you can capture slower speed signal, which we are pumping over the USB.
There is also the logic sniffer, which is fast like the ht4032, but lacks RAM and lacks a programmable threshold. So it often can only capture short bursts of data.
http://www.seeedstudio.com/depot/open-workbench-logic-sniffer-p-612.html?cPath=174
I can't help but think the logic sniffer should be spun to a STM or PSoC chip, and should be given a decent RAM chip, and an adjustable trigger point.
http://www.eevblog.com/forum/testgear/hantek-ht4032l-logic-analyser/15/
That appears to allow you to program your tip point to match your MCU, which can prevent some nasty potential issues. However it seems that they haven't spent the time on the software, so the PC soft seems to be lacking. As well the ht4032 has a bunch of on board RAM which is handy for high speed captures. The Logic knock off is limited in speed by the USB port. Which means you can't capture the USB port signals, but you can capture slower speed signal, which we are pumping over the USB.
There is also the logic sniffer, which is fast like the ht4032, but lacks RAM and lacks a programmable threshold. So it often can only capture short bursts of data.
http://www.seeedstudio.com/depot/open-workbench-logic-sniffer-p-612.html?cPath=174
I can't help but think the logic sniffer should be spun to a STM or PSoC chip, and should be given a decent RAM chip, and an adjustable trigger point.
Welcome to the friendlier side of internet crazy
Re: Logic Anayzer
I have an Intronix LogicPort analyser which I use a lot, it doesn't take up much bench space. It doesn't have the memory depth of a professional tool but its more than adequate for most purposes. 40-channels is enough for a 16-bit address bus, 8-bit data bus and a few control signals which is what I generally use it for, that and debugging serial protocols.
http://www.pctestinstruments.com/
http://www.pctestinstruments.com/