So you would either have to buy a Logic Analyser from Saleae or get an alternative software to avoid violating it. At least that was the case with me.Īn attentive reader has pointed out that the licence conditions do not allow Logic 2 to be used with devices from other manufacturers, although it works perfectly! The notice is quite well hidden. After installation, connect the Logic Analyzer to the PC, and it will be recognized immediately. The installation is so simple and unproblematic that I won’t go into it in detail. The software I use is the free Logic 2 from Saleae. At Saleae you can get logic analysers that scan at 100 or 500 MHz, but they cost a few hundred to over a thousand euros. They are therefore in any case suitable for the common 5 and 3.3 volt based microcontrollers.įor devices with higher measuring frequencies, you have to spend considerably more money. I cannot say whether the devices are actually different or just the information provided by the suppliers. For the lower limit of the HIGH range, the specifications were between 1.2 and 1.8 volts. The limit up to which LOW signals are reliably recognized as LOW seems to be somewhere between 0.6 and 1.0 volts. With its measuring frequency of 24 MHz, it is sufficient for most applications in the field of microcontrollers.Īs for the voltage of the logic levels, I have found different information. For this article, I use one of the common, inexpensive logic analyzers that are available from as little as €10 on Amazon or other online shops. The measurement frequency of the Logic Analyzer must be several times the frequency of the signals to be measured. However, there are also PC-independent units that contain a display and control unit. The data is streamed via USB and analyzed by software. You can think of it like an oscilloscope that only detects the logical states HIGH and LOW. a pin or a line) is at a HIGH or LOW level. What does a Logic Analyzer do? In short, a logic analyser checks with a certain frequency whether a connected contact (e.g.
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