How to communicate with the serial port along with notifier

[avni.vyas@patni.com]

Hello All,

I have a problem, If any one has any suggestion please help me.

I am acquiring dat through the serial port.

I have a customer based hardwrae which talks on serial port.

After I send a srting i.e the command I get a response from the hardware.

I want to read this response.

But i dont know how many bytes will come in the response.

I tried connecting"NO OF BYTES AT PORT" to the serial read but i am getting 0 bytes at port.

And if i read 8 bytes at time till i get the termination char, the process gets delayed.

Please can anyone help me how to read this response as fast as possible

Baud rate is 230400 and i think that it is too fast

so i should response soon.

Please if any one any idea about NOTIFIERS. please let me know

Thanks a lot in advance

With regards

Avni

[chrisger]

hi there

have you tried the VISA events? The functions can be found at "Instrument IO" -> "VISA" -> "VISA Advanced" -> "Event Handling". There's one event called "Serial TermChar", maybe thats what you need. There are examples for VISA events shipped with LV.

[I_I]

Avni,

I don't think the NOTIFIER will help much in this case.

Buffer initialization and proper "time out" would help better in this case.

You can try this sequence :

Initialize port

Initialize Buffer size

Send command to read data on port

Read data till expected end character

Clear Buffer

Close port

Hope this would help you.