how to read serial port in C language.
printf("%d", inport(0));
outportb(0, 65);
delay(1000);
printf("%d", inport(0));

supposing initial value at serial port is 64. Both printf's display 64 only. When u run the program again, then it shows 65.

somebody please help me.

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Some code here must be missing. First, what is the overall project objective? Second, post more complete code. You do not show where you call from the UART port directly and this is what must be done (2F8, 3F8 etc...depending upon what com port you are trying to actually work with --- or is this supposed to be flexible so that the application can use any available serial port?).

borelli35

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G'day,

Yes Borelli35 is correct, you need to be more specific. So, try this link:
www.lvr.com and follow the serial port links.
One I found that might give you some more insight is:
http://www.beyondlogic.org/serial/termpoll.c
If you are using DOS, then these examples may be of some benefit, but there is also a tutorial there on using Windows API calls for 32 bit apps.For WIN Me and above I think you need to use either API calls or DLLs, and that is another thing altogether...

Good Luck,
Elric

I have just started programming for serial port and don't know much about it. Can u pls guide me how to start programming for it.
I posted the code, but that's what I was trying to check as beginner.
Please help me.