Hello,
I am making a pc controlled application where I have used max 232.
So through uart , i send characters.
and i have connected ask transmitter to max232 tx pin.
and receiver on the rxd pin of microcontroller.
but these is not working.
I have tested the modules in other application, they are perfect.
and using wired connection that means directly connecting tx pin of max232 to rxd pin of uc, the code also works.
can someone please help me on this.

 

If I read this right, you have a PC based RS232 application you are sending to a MAX232 on a PIC, Is it the PIC end you have tested and found working, but not with the PC?
Or vice-versa?
Have you jumpered out the hardware handshake on the PC if they are not used?
A drawing may help.
Max.

 

Hello,I have attached a rough block diagram.
I hope that you get the idea what i want to tell.
my pc sends the signal through uart, and i have connected ask tx to it.
and ask receiver is connected to my controller.

 

Are you sending RS232 to the P89 from the RX module?
IOW does the P89 use a MAX232 or equiv?
Max.