thanks ...
I am able to send and receive back my data through RS232 buffer but after i connect all my components, the only response i received back is FFhex when I send a byte of data from the range of 70hex to 79hex.
From the info i got, it said that to send data to the write buffer, I need to send 0X to 5X hex, where X represents the data I want to send while 0 to 5 represent each write buffer. And if I want to read back the data, I need to send 70,71 and 72 hex.
My question is, is it true that I need to send some specific codes to be able to read and write from the buffers ? If so, why ?