Serin question

Bobb Fwed

I have a BS2pe, it checks sensors and controls stuff, but I want it to receive Serial info. The problem is, there is no flow control possible (from a separate device) and the serial info will come at unknown times. Is there any way to get the serial info when it comes?

Obviously I can have it run a Serin between each cycle (which is about 3 cycles per second) and add a timeout of no more than 200ms, but that gives a very small window to hit if the other device is sending info.

What is the easiest/cheapest way to get serial info at random times?

sylvie369

Does the data being sent have any consistent beginning characters? You can use the "wait" function in Serin to have it just sit around "sniffing", as it were, until it detects a code that signals the data you want it to receive. For example, if the data being sent always start with "*DT", use

serin RX, Baud, [noparse][[/noparse]wait ("*DT"), dec var1, dec var2]

Mike Green

You would have to add an external serial buffer like: www.proteanlogic.com/product_periph_rs232.shtml.

Post Edited (Mike Green) : 6/6/2008 10:58:32 PM GMT

Bobb Fwed

There are some prefix data bytes, but I think the buffer is needed either way, huh? Have you used these before?

sylvie369

If Mike says you need a buffer, don't listen to me.··· He's right.

Bobb Fwed

I just bought a couple of these, I will try to remember to let you know how it goes.