AVR-Chat

Have you checked the UART/USART section of the MCU datasheet?  I just 
checked the ATmega88 datasheet, and it provides sample C code for all 
UART operations.  I believe the ATmega8 datasheet provides this as well.

As far as serial in general, there are many pages describing PC serial 
ports.  While they tend to be PC specific, the intro sections generally 
describe serial communications, RS-232, shift registers and such.  One 
of the (many) useful pages full of information is Beyond Logic, try:

http://www.beyondlogic.org/serial/serial.htm#1

Jan Axelson also is a good source of links (and information if you buy 
the book.)

http://www.lvr.com/serport.htm

If I google:

http://www.google.com/search?q=avr+uart+library&hl=en&lr=

I get plenty of links to pages providing serial port libraries.

ATMEL has written Application Note AVR244: UART as ANSI Terminal 
Interface - describing how to connect the AVR to the PC via HyperTerminal.

http://www.atmel.com/dyn/resources/prod_documents/doc2547.pdf

I hope this helps.  Enjoy.

John

pjcxb wrote:
>
> I have so far only written basic logic using "C" for a Mega8 and would
> like to extend this to use of the UART for RS232 comms to external
> devices. Would someone kindly point me in the right direction to find
> some introductory information and some "C" code to do this task?
>
> With thanks,
> Peter
>
>