MeLabs has an example for the 16F877 @4MHz.

Interrupt-driven, 32 byte buffer, 9600 bps hardware serial using assembly
language interrupt handler.

http://www.microengineeringlabs.com/resources/samples/x1/pbp/serbufAx.bas

Portions are in BASIC, but the USART int/buffer code is all assembly.

Regards,

-Bruce
tech@rentron.com
http://www.rentron.com


> Hi all,
> i=B4m trying to comunicate a PC with a PIC16f874(clock 4 MHZ) , using t=
he USART asynchronous mode at 9600 bps. The length of each
message is  8 bytes (8bits,Non Parity,1Stop bit). This PIC has a FIFO buf=
fer(Register RCREG) of two bytes, so the idea is to clean
the buffer before the third byte reach the buffer, i=B4ve been triying to=
 improve the code in the PIC to clean the buffer as fast as
possible, but i =B4m still having this problem. Is there any good code to=
 avoid it? Can it be done adding hardware? Thanks  a lot
> __________________________________________________

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