Proper BF UART implementation?

[Stranman]

There seems to have been a lot of questions on this topic w/o any good answers.

Can the BF UART vi's be used in a polling fashion like the Serial Compatibility vi's can, or must the BF UART vi's be used in a callback fashion?

The first attachment is the Serial Compatibility vi's used in a polling loop - All works!

The 2nd attachment is the UART vi's used in a polling loop - Doesn't work!?

[Kevin_S]

Stranman,

I'm looking further into your question.

Kevin S.

Applications Engineer

National Instruments

[Kevin_S · Accepted solution]

Stranman,

I inquired of R&D as to whether there were any additional details or reasons as to when you would want to use one API (the serial compatibility VIs or the Blackfin UART VIs) over the other.

In short, the serial compatibility VIs use polling and can perform software initiated reads/writes. You would only use the Blackfin UART VIs if you wanted callback based communication. Based on the architecture in your screenshot, you need to use the serial compatibility VIs.

Just for your information, the callback VIs would work as follows:
1. Configure serial parameters, configure callback VI
2. Pretty much wait for the callback and when it has bytes at port, perform the read

Kevin S.

Applications Engineer

National Instruments

[Stranman]

Kevin,

Thanks for the clarification.

- Paul