watchdog.lst

学习AVR单片机的基础实验程序 适合初学者学习提高

__text_start:
__start:
    002A E5CF      LDI	R28,0x5F
    002B E0D4      LDI	R29,4
    002C BFCD      OUT	0x3D,R28
    002D BFDE      OUT	0x3E,R29
    002E 51C0      SUBI	R28,0x10
    002F 40D0      SBCI	R29,0
    0030 EA0A      LDI	R16,0xAA
    0031 8308      STD	Y+0,R16
    0032 2400      CLR	R0
    0033 E6E0      LDI	R30,0x60
    0034 E0F0      LDI	R31,0
    0035 E010      LDI	R17,0
    0036 36E0      CPI	R30,0x60
    0037 07F1      CPC	R31,R17
    0038 F011      BEQ	0x003B
    0039 9201      ST	R0,Z+
    003A CFFB      RJMP	0x0036
    003B 8300      STD	Z+0,R16
    003C E5E4      LDI	R30,0x54
    003D E0F0      LDI	R31,0
    003E E6A0      LDI	R26,0x60
    003F E0B0      LDI	R27,0
    0040 E010      LDI	R17,0
    0041 35E4      CPI	R30,0x54
    0042 07F1      CPC	R31,R17
    0043 F021      BEQ	0x0048
    0044 95C8      LPM
    0045 9631      ADIW	R30,1
    0046 920D      ST	R0,X+
    0047 CFF9      RJMP	0x0041
    0048 940E007D  CALL	_main
_exit:
    004A CFFF      RJMP	_exit
_delay_ms:
  i                    --> R20
  time                 --> R16
    004B 940E009A  CALL	push_gset1
FILE: D:\AVR\我的程序\开门狗实验\cfg.h
(0001) /****************************
(0002) *程序名称：功能函数集
(0003) *设    计：萧联珠
(0004) *日    期：2007-11-23
(0005) ********************************/
(0006) #include <iom16v.h>
(0007) 
(0008) /*延时子程序*/
(0009) void delay_ms(int time)   
(0010) {
(0011)  int i;
(0012)  for(;time>0;time--)
    004D C00A      RJMP	0x0058
(0013)   for(i=0;i<1000;i++);
    004E 2744      CLR	R20
    004F 2755      CLR	R21
    0050 5F4F      SUBI	R20,0xFF
    0051 4F5F      SBCI	R21,0xFF
    0052 3E48      CPI	R20,0xE8
    0053 E0E3      LDI	R30,3
    0054 075E      CPC	R21,R30
    0055 F3D4      BLT	0x0050
    0056 5001      SUBI	R16,1
    0057 4010      SBCI	R17,0
    0058 2422      CLR	R2
    0059 2433      CLR	R3
    005A 1620      CP	R2,R16
    005B 0631      CPC	R3,R17
    005C F38C      BLT	0x004E
    005D 940E009D  CALL	pop_gset1
    005F 9508      RET
(0014) }
(0015) 
(0016) /*端口初始化*/
(0017) void port_init() 
(0018) {
(0019)   DDRB=0xFF;       //配置PB口为输出
_port_init:
    0060 EF8F      LDI	R24,0xFF
    0061 BB87      OUT	0x17,R24
(0020)   PORTB=0xFF;      //PB口的初始值为"1"
    0062 BB88      OUT	0x18,R24
    0063 9508      RET
_display:
  index                --> R20
    0064 940E009A  CALL	push_gset1
(0021) }
(0022) 
(0023) /*流水灯显示*/
(0024) void display()
(0025) {
(0026)  int index;
(0027)  for(index=0;index<8;index++)
    0066 2744      CLR	R20
    0067 2755      CLR	R21
(0028)  {
(0029)    PORTB=~(1<<index);
    0068 E001      LDI	R16,1
    0069 E010      LDI	R17,0
    006A 019A      MOVW	R18,R20
    006B 940E00B1  CALL	lsl16
    006D 0118      MOVW	R2,R16
    006E 9420      COM	R2
    006F 9430      COM	R3
    0070 BA28      OUT	0x18,R2
(0030)    delay_ms(10);
    0071 E00A      LDI	R16,0xA
    0072 E010      LDI	R17,0
    0073 DFD7      RCALL	_delay_ms
    0074 5F4F      SUBI	R20,0xFF
    0075 4F5F      SBCI	R21,0xFF
    0076 3048      CPI	R20,0x8
    0077 E0E0      LDI	R30,0
    0078 075E      CPC	R21,R30
    0079 F374      BLT	0x0068
    007A 940E009D  CALL	pop_gset1
    007C 9508      RET
FILE: D:\AVR\我的程序\开门狗实验\main.c
(0001) /*************************************************
(0002) *实验目的：熟悉开门狗编程
(0003) *设    计：萧联珠
(0004) *日    期：2007-11-23
(0005) *说    明：如果不及时喂狗，那么导致单片机不停复位。
(0006) **************************************************/
(0007) #include <iom16v.h>
(0008) #include "cfg.h"
(0009) #include <macros.h>
(0010) 
(0011) void main()
(0012) {
(0013)   port_init();
_main:
    007D DFE2      RCALL	_port_init
(0014)   WDTCR|=(1<<WDTOE)|(1<<WDE);          /* 置位 WDTOE 和 WDE*/
    007E B581      IN	R24,0x21
    007F 6188      ORI	R24,0x18
    0080 BD81      OUT	0x21,R24
(0015)   WDTCR=(1<<WDE)|(1<<WDP2)|(1<<WDP1);  /*设定周期为1S*/
    0081 E08E      LDI	R24,0xE
    0082 BD81      OUT	0x21,R24
(0016)   
(0017)   display();
    0083 DFE0      RCALL	_display
    0084 C00B      RJMP	0x0090
(0018)   
(0019)   while(1)
(0020)   {
(0021)    
(0022)    PORTB=0xFE;
    0085 EF8E      LDI	R24,0xFE
    0086 BB88      OUT	0x18,R24
(0023)    WDR();         /*喂狗，通过注释这句可以区别是否喂狗的区别*/
    0087 95A8      WDR
(0024)    delay_ms(50);
    0088 E302      LDI	R16,0x32
    0089 E010      LDI	R17,0
    008A DFC0      RCALL	_delay_ms
(0025)    PORTB=0xFF;
    008B EF8F      LDI	R24,0xFF
    008C BB88      OUT	0x18,R24
(0026)    delay_ms(50);
FILE: <library>
    008D E302      LDI	R16,0x32
    008E E010      LDI	R17,0
    008F DFBB      RCALL	_delay_ms
    0090 CFF4      RJMP	0x0085
    0091 9508      RET
push_gset5:
    0092 92FA      ST	R15,-Y
    0093 92EA      ST	R14,-Y
push_gset4:
    0094 92DA      ST	R13,-Y
    0095 92CA      ST	R12,-Y
push_gset3:
    0096 92BA      ST	R11,-Y
    0097 92AA      ST	R10,-Y
push_gset2:
    0098 937A      ST	R23,-Y
    0099 936A      ST	R22,-Y
push_gset1:
    009A 935A      ST	R21,-Y
    009B 934A      ST	R20,-Y
    009C 9508      RET
pop_gset1:
    009D E0E1      LDI	R30,1
pop:
    009E 9149      LD	R20,Y+
    009F 9159      LD	R21,Y+
    00A0 FDE0      SBRC	R30,0
    00A1 9508      RET
    00A2 9169      LD	R22,Y+
    00A3 9179      LD	R23,Y+
    00A4 FDE1      SBRC	R30,1
    00A5 9508      RET
    00A6 90A9      LD	R10,Y+
    00A7 90B9      LD	R11,Y+
    00A8 FDE2      SBRC	R30,2
    00A9 9508      RET
    00AA 90C9      LD	R12,Y+
    00AB 90D9      LD	R13,Y+
    00AC FDE3      SBRC	R30,3
    00AD 9508      RET
    00AE 90E9      LD	R14,Y+
    00AF 90F9      LD	R15,Y+
    00B0 9508      RET
lsl16:
    00B1 2322      TST	R18
    00B2 F021      BEQ	0x00B7
    00B3 0F00      LSL	R16
    00B4 1F11      ROL	R17
    00B5 952A      DEC	R18
    00B6 CFFA      RJMP	lsl16
    00B7 9508      RET