Hi All
i'm using pic16f876 with 2 serial ports , i used the built in usart for =
com1
and used the software method in microchips application note for com2 , =
it
worked fine but i'm not happy with the program, it  ties me up and can't =
use
the rest of the program freely coz com ports are quite busy and i get =
messages every 100 msec.
I'm trying to make the other serial port by RB0 interrupt , when the
interrupt ocurs it sets the TMR0 to take 3 samples of the serial input =
bits
to read and verify for errors , then i read it till the byte has been
received , then move it to the receive buffer and set a flag if EOT  has
been received. I check this flag in the main program loop and take =
action .
I found out that there is another method to use the MAX3100 SPI to RS232
convertor chip , at slightly increased cost i can free my interrupt pin =
and
TMR0 for other stuff .
Any ideas , comments , suggestions are welcome .
Thanx all

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