RS232 Interface question - baud rate selection

[grubby23]

max232 cutecom

Hi

I have a very, very basic and simple question about the RS232 interface. Basically, I have a microprocessor running with 24 MHZ and sends and receives the data over the RX and TX Pin respectively. How do I need now to select the baud rate at my host PC to be able to communicate with the microcontroller over the serial interface?

Thanks

 

[rberek]

Re: RS232 Interface question

You have to program your microcontroller to receive and transmit data at a certain baudrate and then set the PC to send and receive at that baud rate.

How you program the baud rate for your microcontroller depends completely on the microcontroller and your compiler.

r.b.

 

[bld]

Re: RS232 Interface question

What program do you use on your PC to communicate over rs232 line?

 

[jituelect]

Re: RS232 Interface question

A. if you are on windows you can use hyperterminal

B. On linux you can use minicom, cutecom or gtkterm

C. if done using C program (on POSIX system ) you can use termios programming

refer
http://www.easysw.com/~mike/serial/serial.html#1_2

you cannot connect Tx(or Rx) directly to RS232( if pins are TTL , which most are) , you have to use MAX232 in between

 

[amol_shah]

Re: RS232 Interface question

yup jitu is right u have to use MAX232 IC for interfacing micro controller to the PC... using hyper terminal is very simple, check this link for hyper terminal settings

https://www.dnatechindia.com/index.php/Tutorials/8051-Tutorial/HYPERTERMINAL.html