A YouTube user called James has discovered a work around for the Saleae logic analyser’s lack of a rising or falling-edge trigger.
This workaround takes advantage of the analyser’s repeated triggering mode, combined with a simple parallel analyzer.
It is possible to set up a rising-edge trigger by setting the clock mode to rising-edge, and the simple parallel decoder’s trigger mode to detect a value of one.
Every rising edge of the input signal will trigger the analyzer.
Setting the clock mode to falling-edge, and the trigger mode to detect a value of zero, will provide a falling-edge trigger instead.
More complex triggers involving multiple channels can be created by calculating the hexadecimal value of the desired state, and setting the parallel decoder to trigger on that value.
