SPI example with SDW library - Cannot write to DIO of I/O card

[SierraKilo]

Hello,

I just tested the given example of the SPI library but I'm not able to write the digital waveform to my I/O board (NI6537).

I get always failure messages, no matter what I do. -.-

1) Buffer size. I do not know the size for my buffer, if I take 0 (indicating hardware buffering) it does not work....

2) Attempted writing digital data that is not supported.

      Data: 5
      Supported Values: 0, 1

Anybody could give me a hint why it does not work? Or what do I have to change in my VI?

Regards Chris

[chras]

Hi Chris,

I was able to reproduce your error and found the solution which i attached as screenshot.

The DAQmx write function input "data" necessarily has to be connected by a binary value which can be created by using the "Digital Waveform to binary" function block.

My VI works perfectly now, hope you can solve the issue too.

Regards chras