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interface with serial ports

vikasgkutty asked
Last Modified: 2010-04-01
I want to read data from my rs 232 port, and get information like
"Is there a device connected on the other end"
"is it receiving any data"
this is basically for a diagnosis- is there a broken cable, is there a disconnected cable, bad device

I suppose it has something to do with reading pins -like TD,RD, CD etc on the port,
but i am not sure about it.
Can someone give me a general idea in this area

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