main.lst

一个关于AVR单片机的例程

__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 940E006C  CALL	_main
_exit:
    004A CFFF      RJMP	_exit
FILE: E:\avr\跑马灯\main.c
(0001) //ICC-AVR application builder : 2007-1-29 10:04:38
(0002) // Target : M16
(0003) // Crystal: 7.3728Mhz
(0004) // 作者：古欣
(0005) // AVR与虚拟仪器 http://www.avrvi.com
(0006) 
(0007) #include <iom16v.h>
(0008) #include <macros.h>
(0009) 
(0010) #define led_port PORTA
(0011) //定义输出端口
(0012) #define led_ddr DDRA
(0013) //定义输出控制寄存器
(0014) //可以自行修改，必须保持 led_port和led_ddr一致，PORTA对应DDRA
(0015) 
(0016) 
(0017) 
(0018) void port_init(void)
(0019) {
(0020)  PORTA = 0x00;
_port_init:
    004B 2422      CLR	R2
    004C BA2B      OUT	0x1B,R2
(0021)  DDRA  = 0x00;
    004D BA2A      OUT	0x1A,R2
(0022)  PORTB = 0x00;
    004E BA28      OUT	0x18,R2
(0023)  DDRB  = 0x00;
    004F BA27      OUT	0x17,R2
(0024)  PORTC = 0x00; //m103 output only
    0050 BA25      OUT	0x15,R2
(0025)  DDRC  = 0x00;
    0051 BA24      OUT	0x14,R2
(0026)  PORTD = 0x00;
    0052 BA22      OUT	0x12,R2
(0027)  DDRD  = 0x00;
    0053 BA21      OUT	0x11,R2
(0028)  led_ddr=0xff; //设置LED的端口为输出
    0054 EF8F      LDI	R24,0xFF
    0055 BB8A      OUT	0x1A,R24
    0056 9508      RET
(0029) }
(0030) 
(0031) //call this routine to initialize all peripherals
(0032) //此处为ICC系统生成，未做更改
(0033) void init_devices(void)
(0034) {
(0035)  //stop errant interrupts until set up
(0036)  CLI(); //disable all interrupts
_init_devices:
    0057 94F8      BCLR	7
(0037)  port_init();
    0058 DFF2      RCALL	_port_init
(0038) 
(0039)  MCUCR = 0x00;
    0059 2422      CLR	R2
    005A BE25      OUT	0x35,R2
(0040)  GICR  = 0x00;
    005B BE2B      OUT	0x3B,R2
(0041)  TIMSK = 0x00; //timer interrupt sources
    005C BE29      OUT	0x39,R2
(0042)  SEI(); //re-enable interrupts
    005D 9478      BSET	7
    005E 9508      RET
(0043)  //all peripherals are now initialized
(0044) }
(0045) 
(0046) void Delay(void)  //延时，没有详细计算
(0047) {
(0048) unsigned char i,j;
(0049) for(i=20;i>0;i--)
_Delay:
  i                    --> R16
  j                    --> R18
    005F E104      LDI	R16,0x14
    0060 C007      RJMP	0x0068
(0050) {
(0051)   for(j=200;j>0;j--)
    0061 EC28      LDI	R18,0xC8
    0062 C001      RJMP	0x0064
    0063 952A      DEC	R18
    0064 2422      CLR	R2
    0065 1622      CP	R2,R18
    0066 F3E0      BCS	0x0063
    0067 950A      DEC	R16
    0068 2422      CLR	R2
    0069 1620      CP	R2,R16
    006A F3B0      BCS	0x0061
    006B 9508      RET
(0052) ;
(0053) }
(0054) }
(0055) 
(0056) void main()
(0057) {
(0058)  unsigned char i,j,k; //定义变量
(0059)  init_devices();      //初始化
_main:
  j                    --> R20
  i                    --> R22
  k                    --> R10
    006C DFEA      RCALL	_init_devices
    006D C022      RJMP	0x0090
(0060)  while(1)
(0061)  {
(0062)      i=0x80;
    006E E860      LDI	R22,0x80
(0063)      for (j=0;j<8;j++) //循环8次，即PA0~~PA7轮流闪亮 
    006F 2744      CLR	R20
    0070 C00C      RJMP	0x007D
(0064)       {
(0065)         led_port=~i; //反相输出,低电平有效 位操作指令详解：http://bbs.avrvi.com/read.php?fid=30&tid=392&toread=1 
    0071 2E26      MOV	R2,R22
    0072 9420      COM	R2
    0073 BA2B      OUT	0x1B,R2
(0066)         for (k=0;k<10;k++) Delay(); //延时 可自行调节
    0074 24AA      CLR	R10
    0075 C002      RJMP	0x0078
    0076 DFE8      RCALL	_Delay
    0077 94A3      INC	R10
    0078 2D8A      MOV	R24,R10
    0079 308A      CPI	R24,0xA
    007A F3D8      BCS	0x0076
(0067)         i=i>>1; //左移一位 移位算法详解：http://bbs.avrvi.com/read.php?fid=5&tid=897&toread=1
    007B 9566      LSR	R22
    007C 9543      INC	R20
    007D 3048      CPI	R20,0x8
    007E F390      BCS	0x0071
(0068)         // 0b00000001 PA0
(0069)         // 0b00000010 PA1
(0070)         // 0b00000100 PA2
(0071)         // 0b00001000 PA3
(0072)         // 0b00010000 PA4
(0073)         // 0b00100000 PA5
(0074)         // 0b01000000 PA6
(0075)         // 0b10000000 PA7
(0076)       }
(0077) 	  i=1;
    007F E061      LDI	R22,1
(0078) 	 for (j=0;j<8;j++) //循环8次，即PA0~~PA7轮流闪亮 
    0080 2744      CLR	R20
    0081 C00C      RJMP	0x008E
(0079)       {
(0080)         led_port=~i; //反相输出,低电平有效 位操作指令详解：http://bbs.avrvi.com/read.php?fid=30&tid=392&toread=1 
    0082 2E26      MOV	R2,R22
    0083 9420      COM	R2
    0084 BA2B      OUT	0x1B,R2
(0081)         for (k=0;k<10;k++) Delay(); //延时 可自行调节
    0085 24AA      CLR	R10
    0086 C002      RJMP	0x0089
    0087 DFD7      RCALL	_Delay
    0088 94A3      INC	R10
    0089 2D8A      MOV	R24,R10
    008A 308A      CPI	R24,0xA
    008B F3D8      BCS	0x0087
(0082)         i=i<<1; //左移一位 移位算法详解：http://bbs.avrvi.com/read.php?fid=5&tid=897&toread=1
FILE: <library>
    008C 0F66      LSL	R22
    008D 9543      INC	R20
    008E 3048      CPI	R20,0x8
    008F F390      BCS	0x0082
    0090 CFDD      RJMP	0x006E
    0091 9508      RET