dr daq polling digital inputs in c

[mechatronic]

Hello

i have written a program in c which polls the digital inputs every 20ms
...

Code: Select all

  
        UsbDrDaqGetInput(g_handle, 1, 0, &value1);
        UsbDrDaqGetInput(g_handle, 2, 0, &value2);
        UsbDrDaqGetInput(g_handle, 3, 0, &value3);
do some checks
 Sleep(20);

...

this works fine but after a time, sometimes 1min sometimes 30min it crashes with returning 255.
I have reduced the program only to the loop above but it did not help.
is there any timelimit of polling the inputs?



greetings from germany

[Martyn]

Try putting a short delay between each of the GetInput calls and see if that fixes the problem.