/*
 *      LED1190.C
 *
 *      Simple Demo Program for Micro/sys SBC1190
 *      Embeddable Computer
 *
 *      This program merely blinks the red LED on the SBC1190 once
 *      per second.  It is useful for simple download and debug testing.
 *
 *      6/5/98      Micro/sys, Inc.  Glendale, CA  (818) 244-4600
 *
 */

#include <dos.h>


#define P1DIR        0xFF50
#define P1PIN        0xFF52
#define P1CON        0xFF54
#define P1LTCH       0xFF56
#define REDLED       0x40       /* port pin P1.6 */

void delay_500ms(void);

void main(void)
{
	outp(P1CON, inp(P1CON) & ~REDLED); /* setup pin as I/O */
        outp(P1DIR, inp(P1DIR) & ~REDLED); /* setup pin for output */

	for(;;)
	{
		outp(P1LTCH, inp(P1LTCH) & ~REDLED); /* turn on LED   */
		delay_500ms();                           /* a rough delay */
		outp(P1LTCH, inp(P1LTCH) | REDLED);  /* turn off LED  */
		delay_500ms();
	}
}

#ifdef __TURBOC__
void delay_500ms(void)
{
	long start_time;

	start_time = biostime(0, 0l);
	while (biostime(0, 0l) <= start_time + 9)
		;
}
#else   /* Microsoft C */
void delay_500ms(void)
{
	long start_time,timenow;

	_bios_timeofday(0,&start_time);

	do
	{
		_bios_timeofday(0,&timenow);
	} while (timenow <= start_time + 9);
}

#endif