Clearing buffer?

[boyracer38]

I'm sending data between two VI's on separate machines via serial read/write.

Some times, the VI will read garbage data, sending it loopy.

Is there any way of flushing the buffer, to clear it before sending data?

Or is there a better way of dealing with this?

I have to use serial comms as its part of a assignment for university.

Thanks

Jason

[didierj]

Is there any way of flushing the buffer, to clear it before sending data?

3364[/snapback]

Before you make any transmission read out the buffer. For this go to the palette Instrument I/O>Serial use the VISA Bytes at Serial Port and wire it to the byte count input of the VISA read.

Didier

[malef]

Dear list,

in

...\LabVIEW...\vi.lib\instr\_sersup.llb

you will find additional VIs for serial comm.

With "windows Flush com buffers.vi" transmit and receive buffer can be cleared separately.

It's a Windows specific VI. May be its the reason NI hides it from functions palette.

Greetings

Manfred

[boyracer38]

Manfred,

Thanks. That exactly what i was after.

Regards

Jason

[Kathryn62]

Manfred,

This also made a world of difference to my communications with a simple serial device. I had been monitoring with portmon which just said the instrument wasn't sending and flushing with VISA flush I/O buffer which was not sufficient.

Many, many thanks,

Kathryn