RS232 serial Communication LF CR Please help me!

[seokgi]

I always appreciate your help.
I want to receive data via RS-232.
I know the general stuff.
I want to receive data via RS-232, receive CR or LF, or store it in a variable if it exceeds 33 characters and send it back. I refer to the contents of the forum but it does not work. I do not know what mistake I made.
Help me.
Thank you.

[seokgi]

I modified my program. use circulabuffer.
But not work.

Sombody Help me.

[chipfryer27]

Hi

I don't have a copy of FC with me at present (traveling) so I can't look at your code, but I was going to suggest the use of a Circular Buffer but you beat me to it <s>

There are many examples of using the buffer and many related posts. I needed assistance last year in using the RS232 / CB components.

I ended up with an interrupt on RxInt which branched to a handling macro. In the macro I would place each incoming byte into the circular buffer and return upon timeout (i.e. when nothing more was coming in). In the main program I would look for certain characters (Look for Value command) to be present in the buffer (e.g. CR / LF whatever) before branching to a further handling routine if found.

I could then parse or do whatever, and if any further transmissions were received they would "interrupt" and fill more of the CB ensuring I lost nothing whilst processing data.

If you still need help when I return, I will dig out the project and perhaps it may help you, but that won't be until next week sometime.

Regards