> > For the transmit of data, I am using built-in RS232
> function of CCS C Compiler like, printf, putchar, etc.
> >
> > I don't know what is wrong here. Any ideas are wellcome.

>So does the "built-in RS232 functions of the CCS C Compiler" enable the
>driver before transmit? I suspect not.

>You need to turn on the driver, transmit all of your bits, and then turn
>off the driver (to receive). This is more housework than the "typical"
>RS232 routines do.

The #USE RS232 directive in CCS C allows you to define a pin as an enable
output for use with RS-485.
An example would be:
#use rs232(baud=9600, xmit=PIN_B1, rcv=PIN_B2, enable=PIN_B3)
where PIN_B3 is set high during transmit.
I have not personally used the function, so I cannot verify that it actually
works as expected.

Hope this helps,
Jonathan King