t0_led.lst

学习AVR单片机的基础实验程序 适合初学者学习提高

__start:
__text_start:
    002B E5CF      LDI	R28,0x5F
    002C E0D4      LDI	R29,4
    002D BFCD      OUT	0x3D,R28
    002E BFDE      OUT	0x3E,R29
    002F 51C0      SUBI	R28,0x10
    0030 40D0      SBCI	R29,0
    0031 EA0A      LDI	R16,0xAA
    0032 8308      STD	Y+0,R16
    0033 2400      CLR	R0
    0034 E6E2      LDI	R30,0x62
    0035 E0F0      LDI	R31,0
    0036 E010      LDI	R17,0
    0037 36E2      CPI	R30,0x62
    0038 07F1      CPC	R31,R17
    0039 F011      BEQ	0x003C
    003A 9201      ST	R0,Z+
    003B CFFB      RJMP	0x0037
    003C 8300      STD	Z+0,R16
    003D E5E4      LDI	R30,0x54
    003E E0F0      LDI	R31,0
    003F E6A0      LDI	R26,0x60
    0040 E0B0      LDI	R27,0
    0041 E010      LDI	R17,0
    0042 35E6      CPI	R30,0x56
    0043 07F1      CPC	R31,R17
    0044 F021      BEQ	0x0049
    0045 95C8      LPM
    0046 9631      ADIW	R30,1
    0047 920D      ST	R0,X+
    0048 CFF9      RJMP	0x0042
    0049 940E007F  CALL	_main
_exit:
    004B CFFF      RJMP	_exit
FILE: D:\AVR\我的程序\定时器0溢出中断实验\cfg.h
(0001) /*******************************
(0002) *程序名称：各功能函数
(0003) *作    者：萧联珠
(0004) *日    期：2007-11-20
(0005) ********************************/
(0006) #include <iom16v.h>
(0007) int flag_led=0;
(0008) 
(0009) /*端口初始化*/
(0010) void port_init() 
(0011) {
(0012)  PORTB=0xFF; //PB口配置为输出
_port_init:
    004C EF8F      LDI	R24,0xFF
    004D BB88      OUT	0x18,R24
(0013)  DDRB=0xFF; //PB口初始值为"1"
    004E BB87      OUT	0x17,R24
    004F 9508      RET
(0014) }
(0015) 
(0016) /*定时器0初始化*/
(0017) void timer0_init()  //因为定时时间太短，看不到灯的变化
(0018) {
(0019)  SREG = 0x80;          //使能全局中断
_timer0_init:
    0050 E880      LDI	R24,0x80
    0051 BF8F      OUT	0x3F,R24
(0020)  TIMSK|=(1<<TOIE0);   //使能T0溢出中断
    0052 B789      IN	R24,0x39
    0053 6081      ORI	R24,1
    0054 BF89      OUT	0x39,R24
(0021)  TCCR0=0x01;         //配置定时器工作普通模式
    0055 E081      LDI	R24,1
    0056 BF83      OUT	0x33,R24
(0022)  TCNT0=0;            //给定时器赋初值
    0057 2422      CLR	R2
    0058 BE22      OUT	0x32,R2
    0059 9508      RET
_timer0_ovf:
    005A 922A      ST	R2,-Y
    005B 923A      ST	R3,-Y
    005C 938A      ST	R24,-Y
    005D 939A      ST	R25,-Y
    005E 93EA      ST	R30,-Y
    005F B62F      IN	R2,0x3F
    0060 922A      ST	R2,-Y
(0023) }
(0024) 
(0025) /*定时器0中断服务程序*/
(0026) #pragma interrupt_handler timer0_ovf:10
(0027) void timer0_ovf(void)
(0028) {
(0029)   flag_led=flag_led+1;
    0061 91800060  LDS	R24,flag_led
    0063 91900061  LDS	R25,flag_led+1
    0065 9601      ADIW	R24,1
    0066 93900061  STS	flag_led+1,R25
    0068 93800060  STS	flag_led,R24
(0030)   if(flag_led==1000)   //对PB口取反
    006A 3E88      CPI	R24,0xE8
    006B E0E3      LDI	R30,3
    006C 079E      CPC	R25,R30
    006D F449      BNE	0x0077
(0031)   {
(0032)     flag_led=0;
    006E 2422      CLR	R2
    006F 2433      CLR	R3
    0070 92300061  STS	flag_led+1,R3
    0072 92200060  STS	flag_led,R2
(0033) 	PORTB=~PORTB;
    0074 B228      IN	R2,0x18
    0075 9420      COM	R2
    0076 BA28      OUT	0x18,R2
(0034)   }
    0077 9029      LD	R2,Y+
    0078 BE2F      OUT	0x3F,R2
    0079 91E9      LD	R30,Y+
    007A 9199      LD	R25,Y+
    007B 9189      LD	R24,Y+
    007C 9039      LD	R3,Y+
    007D 9029      LD	R2,Y+
    007E 9518      RETI
FILE: D:\AVR\我的程序\定时器0溢出中断实验\main.c
(0001) /****************************************
(0002) *实验目的：熟悉定时器溢出中断编程
(0003) *设    计：萧联珠
(0004) *日    期：2007-11-20
(0005) ****************************************/
(0006) #include <iom16v.h>
(0007) #include "cfg.h"
(0008) 
(0009) void main()
(0010) {
(0011)   port_init();
_main:
    007F DFCC      RCALL	_port_init
(0012)   timer0_init();
    0080 DFCF      RCALL	_timer0_init
(0013)   
(0014)   while(1);
FILE: <library>
    0081 CFFF      RJMP	0x0081
    0082 9508      RET