hi,
i hv been wrking with dot matrix.i want to send the string(to display) from pc to the ucontroller.hw can i send the string to the ucontroller ?serial communication?if so,hw to accomplish it?plz ,inform me in details.
Yes you can easily send te data to Microcontroller from Pc through the Serial communication port. In 8051 the data from the Serial cable to SBUFF. which is the register.
SFR (Special Function Register)
So serial communication is easily done through a DB9 Cable.
simplest and cheapest method will be using TV remote as transmitter (that saves you time and cost in designing the transmitter)
use a philips remote control which has RC5 protocol as o/p : https://www.dnatechindia.com/index.php/Tutorials/8051-Tutorial/RC5-Protocol.html
use TSOP 1738 for receiver
other methods RF, GSM, bluetooth
I think you better use PIC and send your Character via COM Port USART Module of PIC will receive it.
then you can display your character using your own library functions.