txtest.c

picc_18v 8.35pl35 PIC18系列单片机开发C编译器

#include <pic18.h>

void putch(unsigned char);

void putch(unsigned char c)
{
   while(!TRMT) 	// TRMT1 is set when TSR is empty
      continue;

  TXREG = c;		// load the register
}

void main(void)
{
	// initialise
	TXSTA=0x26;
	SPEN=1;
	// transmit the string
	while(1)
	{
		putch('s');
	}
}