real port interfacing with compim & virtual terminal

[Roshan]

Hi,

I want to send serial data (usart) with pic16f877 to com port & i want to see all data ( send & receive). How can i set this circuit.

my diagram.

pic16f877-->max232-->virtual terminal

in this way my program is working. program send data on terminal & then i send back some text.

How can i send this data to com port & also want to see all data.

Regards

Roshan

[Roshan]

not replyed by any one. I see here is many user of compim, no one can give idea or help.


Regards

[Richard_Reeves]

not replyed by any one. I see here is many user of compim, no one can give idea or help.


Regards

But you posted your first message on a Sunday (yesterday) afternoon, and your follow-up early today.
Today is also national holiday in Britain.



Richard

[Roshan]

when i simulate compim I find pin no.-2 colour(logic state of pin) goes yellow. Can some one guide me what is this ?

Regards

Roshan

[Richard_Reeves]

when i simulate compim I find pin no.-2 colour(logic state of pin) goes yellow. Can some one guide me what is this ?

Regards

Roshan

A yellow pin is contention, that is you are probably connecting two outputs together (see picture below.)
Could you have pins 2 and 3 the wrong way round?



Richard

[Roshan]

Dear Sir,

I am attaching picture, which i have picked at simulation time.

Regards

Roshan

[Roshan]

Dear Sir,

My circuit is same as you mentioned in your picture.

Pin14 is max 232 output & it connects with pin 2.


If it is my mistake then what is soluation ?

txpin of pic-->max232 in-->max232 out-->compim pin2

this is my config which i am using.

Regards

Roshan

[Richard_Reeves]

Roshan,
You are getting the RXD and TXD pins of COMPIM the wrong way round. The RXD pin is data comming in to the serial port, not out.
Swap the RXD and TXD pins on your COMPIM and it should be okay.



Richard

[Roshan]

Dear Sir,

Thanks for reply. As per your instruction i have swaped pins 2 & 3.

Now it does not go yellow.

Pls. inform me if i want to add virtual terminal how can i connect this.

Regards

Roshan

[Roshan]

Dear Mr. Richard,

Thanks for your support.

With your help i have completed my project.

It send at commands to modem for sms.

Regards

Roshan