Hello,
I'm using a NI6602, nidaqmx on linux. In my application I'm using ctr0 to read from an encoder. In order to reset the position when I get a counter output pulse (due to overflow of the register (cross from 1...1 to 0)) I want to connect ctr0InternalOutput to Ctr0Gate. If I do it with a wire it just works perfectly.
But since the functionality is supposed to be there I want to avoid external wires.
ctr0InternalOutput is exported to RTSI0 (I have used it to count pulses with another counter (connecting RTSI0 as source) and it works).
I would expect that connecting RTSI0 to the counter gate with connectterms it would work but it does not.
PFI38 is Ctr0Gate in NI6602. As I mentioned above I have Ctr0InternalOutput already connected with ConnectTerms to RTSI0.
I make a DisconnectTerms of all those lines before starting connections.
DAQmxErrChk(nidaqmx.DAQmxConnectTerms("/Dev1/RTSI0", "/Dev1/Ctr0Gate", DAQmx_Val_DoNotInvertPolarity))#Software allows this but it does not work without cable.
DAQmxErrChk(nidaqmx.DAQmxConnectTerms("/Dev1/Ctr0InternalOutput", "/Dev1/Ctr0Gate", DAQmx_Val_DoNotInvertPolarity))#Hardware does not support it
DAQmxErrChk(nidaqmx.DAQmxConnectTerms("/Dev1/Ctr0InternalOutput", "/Dev1/PFI38", DAQmx_Val_DoNotInvertPolarity))#Hardware does not support it (2)
DAQmxErrChk(nidaqmx.DAQmxConnectTerms("/Dev1/RTSI0", "/Dev1/PFI38", DAQmx_Val_DoNotInvertPolarity))#Hardware does not support it (3)
I also tried with Export signal, with the same (lack of) success,...
DAQmxErrChk(nidaqmx.DAQmxExportSignal(self.positionTask, DAQmx_Val_CounterOutputEvent, "/Dev1/PFI38"))#Hardware does not support it (4)
DAQmxErrChk(nidaqmx.DAQmxExportSignal(self.positionTask, DAQmx_Val_CounterOutputEvent, "/Dev1/Ctr0Gate"))#Hardware does not support it (5)
DAQmxErrChk(nidaqmx.DAQmxExportSignal(self.positionTask, DAQmx_Val_CounterOutputEvent, "/Dev1/Ctr0Gate"))#Hardware does not support it (5)
Thank you very much for your time
