I'm generating pulses on ATmega32 and I need to see the pulse wave in the oscilloscope in order to check its frequency. So I connect the pin to the oscilloscope channel and the pin blinks on and off but the oscilloscope doesn't show the wave... what am I doing wrong? Is there any other way to measure the frequency?
Unfortunately sometimes the oscilloscope behaves strangely and doesn't show the waveform for a while.
One alternative is to use the frequency meter assuming that the frequency of the signal you want to measure is constant. The frequency meter needs 1 second of simulation time in order to show a result and is refreshed every second.
The second method which can show the result almost instantly (unlike the frequency meter) is to use the digital graph, place a voltage probe in the schematic and add it to the digital graph, then you can use the snap on edge function of the cursor to see the duration of the signal you are interested in (shown in the lower left corner of the graph).