Luckily, the Logic use the IC CY7C68013, and nearly the same circuit as my USB2.0 Development board, so I try to hack it, making a Logic clone for myself. And its price is acceptable for hobby player. Among hobby-level logic analyzers, the Logic has a good mix of features and decent sampling rates. The Logic is a cheaper USB logic analyzer with eight channels and sampling rates up to 24MHz. But most Analyzer is so expensive that out of our budget. Purchased a hand held logic probe and this is also proved useful and I now have a logic probe I plug into the breadboard which I hope will perform well enough.Ĭheers again for the info link, very good article.To debug the communication between two chips, you need a Logic Analyzer. Anyway I won't be buying a very expensive LA for my hobby fiddling about and I'll make this one work. Will try some experiments later when I get back to the workbench. However it may be, for the work I'll do, this won't be a problem.Įxternal triggering seems to be useful though as everything can happen so fast you may not capture what you are looking for or capture it and not be able to subsequently find it among the mass or collected data especially if you don't use a protocol that decodes it into something more readable. I understand now why a clocked signal capture could be really important if the capture rate isn't fast enough to resolve different logic state changes. Scroll down on this link to "External Clocks".
The small signal you're seeing could be just the CLK picking up other signals on the PCB. I don't know if I can use it without the CLK feature - depends on what it does whether I will be able to utilise it in the future.
I missed where that internal/external selection is. I don't know how to tell if any additions have been made for the CLK input. Mine doesn't look like anything like any of those clones on the inside. I tried Logic 1.1.15 and 1.2.1, but can't find an external clock option. The second one shows a screendump of version 1.1.4. The first one tells to go to the saleae download page. In software the internal or external clock can be selected. The CLK input on other models can be used for the signal, but also without. It seems there is alternative software for it :Ĭould you open the case, to see if some additions are made for the CLK input ? If they are, they put the Saleae brand name on a clone. Some have +5V and GND, most have GND and GND.Ĭould you measure if that CLK is an really an input ?
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