watchdog.asm

来自「bf533平台图像采集程序」· 汇编 代码 · 共 101 行

#include <defBF532.h>
.section L1_code;
.global		_BF533_WDOG_WRITE_CNT;
.global		_BF533_WDOG_WRITE_CTL;
.global		_BF533_WDOG_WRITE_STAT;
.global     _BF533_WDOG_INTERRUPT_enable;
.global		_BF533_WDOG_RESTART;


_BF533_WDOG_WRITE_CNT:

	p0.h = hi(WDOG_CNT);
	p0.l = lo(WDOG_CNT);

	r0.l = 0xffff;
	r0.h = 0xffff;
	[p0] = r0;

	SSYNC;

_BF533_WDOG_WRITE_CNT.END:	
RTS;

_BF533_WDOG_WRITE_CTL:

	p0.h = hi(WDOG_CTL);
	p0.l = lo(WDOG_CTL);

	r0.l = 0x0000;//0x04//0x0AD0;//generate reset event
	w[p0] = r0.l;

	SSYNC;

_BF533_WDOG_WRITE_CTL.END:	
RTS;


_BF533_WDOG_RESTART:

	p0.h = hi(WDOG_CTL);
	p0.l = lo(WDOG_CTL);

	r0.l = 0x0AD0;//stop watchdog count
	w[p0] = r0.l;

	r0.l = 0x8004;//clear watchdog timer expired bit
	w[p0] = r0.l;
	
	SSYNC;

_BF533_WDOG_RESTART.END:	
RTS;



_BF533_WDOG_WRITE_STAT:

	p0.h = hi(WDOG_STAT);
	p0.l = lo(WDOG_STAT);

	r0 = 0x0000(z);//generate reset event
	[p0] = r0;

	SSYNC;

_BF533_WDOG_WRITE_STAT.END:	
RTS;


_BF533_WDOG_INTERRUPT_enable:

	
	p0.h = hi(SIC_IAR2);
	p0.l = lo(SIC_IAR2);

	r0 =[p0];
	
	r1.h= 0x6000;//IVG13
	r1.l= 0x0000;//IVG13
	r0=r0|r1;
	[p0] = r0;

	p0.h = hi(SIC_IMASK);
	p0.l = lo(SIC_IMASK);

	r0 =[p0];
	r1.l= 0x0000;
	r1.h= 0x0080;
	r0=r0|r1;
	[p0] = r0;

	
	SSYNC;

_BF533_WDOG_INTERRUPT_enable.END:	
RTS;