watchdog.s

meg16 的所有功能实例

	.module watchdog.c
	.area text(rom, con, rel)
	.dbfile E:\MYWORK~1\开发设计\EasyAVR\程序范例\Mega16例程\WATCHD~1\watchdog.c
	.dbfunc e main _main fV
	.even
_main::
	.dbline -1
	.dbline 41
; /****************************************Copyright (c)**************************************************
; **                               ADEmbed Development Co.,LTD.                                    
; **                                 http://www.adembed.com
; **--------------File Info-------------------------------------------------------------------------------
; ** File name:			watchdog.c
; ** Last modified Date:  2008-12-13
; ** Last Version:		1.0
; ** Descriptions:		watchdog Test.
; ** 
; **------------------------------------------------------------------------------------------------------
; ** Created by:			junbolu
; ** Created date:		2008-12-13
; ** Version:				1.0
; ** Descriptions:		
; **
; **------------------------------------------------------------------------------------------------------
; ** Modified by:
; ** Modified date:
; ** Version:
; ** Descriptions:
; **
; **------------------------------------------------------------------------------------------------------
; **ICC-AVR application builder : 2008-12-13
; **Target : M16
; **Crystal: 7.3728Mhz
; 
; **WDP2 WDP1 WDP0 看门狗振荡器周期   VCC = 3.0V 时典型的溢出周期 VCC = 5.0V 时典型的溢出周期
; **0    0    0    16K (16,384)       17.1 ms                     16.3 ms
; **0    0    1    32K (32,768)       34.3 ms                     32.5 ms
; **0    1    0    64K (65,536)       68.5 ms                     65 ms
; **0    1    1    128K (131,072)     0.14 s                      0.13 s
; **1    0    0    256K (262,144)     0.27 s                      0.26 s
; **1    0    1    512K (524,288)     0.55 s                      0.52 s
; **1    1    0    1,024K (1,048,576) 1.1 s                       1.0 s
; **1    1    1    2,048K (2,097,152) 2.2 s                       2.1 s
; *******************************************************************************************************/
; #include <iom16v.h>
; #include <macros.h>
; 
; void main(void)
;  {
	.dbline 42
;  WDTCR|=(1<<WDP1)|(1<<WDP2)|(1<<WDE);        //看门狗定时器预分频器设置
	in R24,0x21
	ori R24,14
	out 0x21,R24
	.dbline 43
;  WDTCR|=(1<<WDP0);							 //使能看门狗
	in R24,0x21
	ori R24,1
	out 0x21,R24
	xjmp L3
L2:
	.dbline 46
	.dbline 47
	wdr
	.dbline 48
L3:
	.dbline 45
	xjmp L2
X0:
	.dbline -2
L1:
	.dbline 0 ; func end
	ret
	.dbend