Communication of PC with PIC microcontroller

[salild]

Hi,
I want to change the value of two or three variables in my PIC18F4431 microcontroller from PC's serial port / parralel port . Can anybody help?
Bye,
Salil

 

[samcheetah]

you should search on this forum. this has been discussed alot of times

Sending Data To A Microcontroller
http://www.rentron.com/sending_data.htm

Receiving Data From A Microcontroller
http://www.rentron.com/receiving_data.htm

 

[IanP]

Do you have RS-232 driver that converts 0-5V levels from PIC to +/- levels of PC serial port?
and
Is your PIC programmed to take characters (alphanumeric or numeric) from serial port? and execute this command by changing "the value of two or three variables"..

As far as PC side is concerned you can use terminal software such as for example h**p://www.rfinnovations.com.au/Uploads/Images/RFI-Interm%20Rev1.1(1).zip
From this you will be able to send single characters or strings of characters to your PIC.