Extended Full Duplex Serial - RxStr Question

ryfitzger227

Hello,

I'm working on a project that interfaces a Propeller microcontroller with a vb.net application. What I'm trying to achieve is the microcontroller to "wait" until the user of the vb.net program is ready. When he is ready, he will press a button that sends a string to the Propeller of ABC. Once the Propeller gets that, it will continue. I've tried everything and I can't get it to work. What am I doing wrong? I'm using the default delimiter of a comma.

VB.NET Code

COMPort.Write("ABC,")

Propeller Code

repeat until strcomp(MyVar, string("ABC"))
    serial.RxStr(@MyVar)
'continue

What could I be doing wrong with something this simple?

Ariba

repeat until strcomp([COLOR="#FF0000"]@MyVar[/COLOR], string("ABC"))
    serial.RxStr(@MyVar)
'continue

How is MyVar defined? It should be a byte array. The name MyVar sound more like a long. A long will work here accidentally, but only as long as the received string is not more than 3 characters.

Andy

ryfitzger227

MyVar is defined as a byte array. Making it the address of MyVar worked. Thanks!

Unsoundcode

Parallax have an application note , AN018, that covers PC to Prop communications, it has some nice tips.

http://www.parallaxsemiconductor.com/an018

Jeff T.