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How can I do serial comm port I O?
C Interview Questions and Answers
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How can I do serial comm port I O?
Q:
How can I do serial (``comm'') port I/O?
A: It's system-dependent. Under Unix, you typically open, read, and write a device file in /dev, and use the facilities of the terminal driver to adjust its characteristics.Under MS-DOS, you can use the predefined stream stdaux, or a special file like COM1, or some primitive BIOS interrupts, or (if you require decent performance) any number of interrupt-driven serial I/O packages. Several netters recommend the book C Programmer's Guide to Serial Communications, by Joe Campbell.
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