So yesterday I received my new Digital Discovery and got started capturing some waveforms and even decoding them with the UART protocol analyser. I managed to trigger on specific protocol bytes, all going well.
This morning I've started by loading the same Workspace and nothing is displayed all inputs are shown as logic high levels (even though I have enabled the pull-downs in the Power Supplies TAB).
So I've reverted to simple waveforms, no protocol involved. I've set a negative edge trigger on "DIN 0" (I assume this is the input labelled HIGH SPEED INPUTS on the unit?) and connected it to my logic board (with a GND as well). I am set to 100MHz clock and 4M samples.
My problem is, when I click on "Single" I see config'ed trig'ed done but there is just a high logic level displayed with no sign of the waveform!!
I know there is signal on the input because I have an oscilloscope connected to the same pin and that shows me a clear 0 to 3.3v UART logic waveform repeating.
Question
PhilipJ
So yesterday I received my new Digital Discovery and got started capturing some waveforms and even decoding them with the UART protocol analyser. I managed to trigger on specific protocol bytes, all going well.
This morning I've started by loading the same Workspace and nothing is displayed all inputs are shown as logic high levels (even though I have enabled the pull-downs in the Power Supplies TAB).
So I've reverted to simple waveforms, no protocol involved. I've set a negative edge trigger on "DIN 0" (I assume this is the input labelled HIGH SPEED INPUTS on the unit?) and connected it to my logic board (with a GND as well). I am set to 100MHz clock and 4M samples.
My problem is, when I click on "Single" I see config'ed trig'ed done but there is just a high logic level displayed with no sign of the waveform!!
I know there is signal on the input because I have an oscilloscope connected to the same pin and that shows me a clear 0 to 3.3v UART logic waveform repeating.
Can you suggest what is going wrong?
PhilipJ
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