M-Series DO Configuration under DDK

[Gord]

The M-Series User Manual, Chapter 6, Digital I/O,  talks about Programmable Power-up States and sending TTL level outputs.  What functions in the DDK are used to configure these settings?  Is there any sample code?

The spec sheets for the 6225 and 6259 describe Output High Current and Output Low Current.  Is there anything to configure here or are these intended to be operating limits?

Thanks,

Gord

[Tom_W_[DE]]

Hi Gord-

Programmable Power-up States are controlled by software, so you could implement similar functionality in your driver by simply writing known values to the lines whenever your application is initialized.  There is no sample code because the implementation is essentially left up to the user.

The current ratings quoted in the spec sheets for those devices are the operating limits of the digital control ASIC on the board and are not configurable through software.  It's best to regard these as operational limits.

Hopefully this helps-

[Gord]

Thanks for your response Tom!

The solution seems quite simple, but I do have concerns about output voltages that float during system startup.  Our current system uses an E-Series card with a DO configured to trigger a Record operation on a separate computer system.  The DO floats enough during startup to falsely trigger a TTL input and I want to prevent that from happening with the M-Series cards.

Gord