delay.asm

bf533平台图像采集程序

#define CLKIN 12

//1us = CLKIN*delay_unit

//delay(us)

.global _delay;
.extern _delay_unit;

.section L1_code;

_delay:
	p0.l = _delay_unit;
	p0.h = _delay_unit;
	r1 = [p0];
	r0 *= r1;
//	r1 = CLKIN(z);
//	r0 *= r1;
		
	p0 = r0;
	
	l0 = 0;
	lsetup(ds, de) lc0 = p0;
	ds: 
	de: nop;
	
	rts;
_delay.end:
	nop;