switch between inputs and outputs of DIO 650x using DAQmx API

[markus kossmann]

We need to switch 2 ports (16 lines) of our DIO 650x from input to output and vice versa.  We want to use the DAQmx C-API for that task.

What steps are needed to this ? Is

Stop task

Either Create DO Channel or Create DI Channel 

Start task

OK,  or are there additional steps necessary.

[nikolair]

Hi Markus,

you also have to create a new task for switching between read/write operation on the same port. So it's not enough to stop the task, you should clear it and reinitialize with the same channels after that.

Have a look on the DAQmx examples Read/Write from/to digital port on your local folder, that should give you more insight in DAQmx programming with the C-API:

C:\Programme\National Instruments\NI-DAQ\Examples\DAQmx ANSI C\Digital\

regards,

Nikolai