18F4620 as a hyperterminal

[newbee]

Hello,

I am very new to micro controllers, and was wondering if this forum can help. I am trying to make a 18F4620 work in both echo mode and respnsive mode, by that I mean, when i type ':' on the hyperterminal I should get an ':' back also I should get the value attached with ':'

Example :

Hyperterminal Input:

:

Hyperterminal output:

::a


I have followed the codes suggested in the links in this website, and formulated my code..and this is as follows ..

[Guest]

What, if any, response do you get when you run your code?

Is this a copied and pasted version of your code? I see a few syntax errors that would cause the code to not even compile. You also don't have a #use rs232 statement, so your baud rate is undefined.

Even though it won't give you a compiler error, it is bad practice to use delays in interrupt service routines. If you type two characters within 3 seconds of each other, the second one will be missed, since you are stuck in a 3 second delay. Look at ex_sisr.c in the example folder. Use this int_rda, and bgetc(). don't forget to define bkbhit. Then, in your while(1) loop in the main function, poll bkbhit. If its true, call bgetc. Then do your switch case/delays/echoing. This way, you won't miss received characters.

Also, what program are you using as a terminal? I've had problems using hyperterminal to send characters. I prefer realterm. Everything is configurable, and half duplex is possible.

[Newbee]

Well yes I have not pasted the whole code. The code compiles and the present output is something like this

Hyperterminal Input:

:


hyperterminal output:

:a

So its not echoing back ':' when it is typed, so thats where the problem arisis. If I concetrate on the echo mode, then the charecter does not get displayed, so its like vice-versa. But I want them both to work together, which is the ultimate solution.

Thanks

Dave

[Guest]

Maybe I'm not understanding the problem.

Do you want hyperterminal to echo the original ':' or the PIC?

[Newbee]

The PIC, I want the PIC to echo characters sent to it, and respond to the characters which the input is associated with.

[Guest]

Currently, your code is set up to only print one ':', when it echos. So the code is echoing the input ':', but you haven't told it to send the second ':'.
place fputc(':',USER) inside the case ':' construct, above fputc('a',USER)