Here is code taken from the Core File Documentation pdf file.

This code shows how to echo and recieve data from the serial port.


	.copy "v:\ece320\54x\dsplib\core.asm"

	.sect ".data"
hold	.word 0

	.sect ".text"
main
	stm #hold,AR3		;Read to hold location

	READSER 1		;Read on byte from serial port

	cmpm AR1,#1		;Did we get a character?
	bc main,NTC		;if not, branch back to start

	stm #hold,AR3		;Write from hold location
	WRITSER 1		;... one byte

	b main