COSMOS SLIP support constants

Macros
#define	SLIP_FEND   0xC0
	SLIP Buffer End character.
#define	SLIP_FESC   0xDB
	SLIP Buffer Escape character.
#define	SLIP_TFEND   0xDC
	SLIP Buffer Escaped End character.
#define	SLIP_TFESC   0xDD
	SLIP Buffer Escaped Escape character.

Detailed Description