007.lst

定时器T1中断实验。 1、定时器中断实验。定时器产生10mS周期中断

__start:
__text_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 36E1      CPI	R30,0x61
    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 940E005C  CALL	_main
_exit:
    004A CFFF      RJMP	_exit
FILE: E:\ICCAVR\project\AVRMEG~2\icc\007-T1-LED\main.c
(0001) /*
(0002) 实验七：
(0003) 	定时器T1中断实验。
(0004) 	1、定时器中断实验。定时器产生10mS周期中断，通过计数让PB1电平产生周期变化。
(0005) 	2、内部1 M晶振。
(0006) 	3、进行此实验请插上JP1的所有8个短路块，JP7(LED_EN)短路块。
(0007) 
(0008) 	AVR  mega16学习板
(0009) 	www.iccavr.com
(0010) 	2006-04-03
(0011) */
(0012) 
(0013) #include "iom16v.h"
(0014) #include <macros.h>
(0015) 
(0016) /*初始化定时器，产生10mS周期中断*/
(0017) void T1_Init(void) {
(0018) 	
(0019) 	OCR1A = 1250;				/*计数周期为10mS，F=1M*/
_T1_Init:
    004B EE82      LDI	R24,0xE2
    004C E094      LDI	R25,4
    004D BD9B      OUT	0x2B,R25
    004E BD8A      OUT	0x2A,R24
(0020) 	TIMSK |= (1 << OCIE1A);		/*比较中断A允许*/
    004F B789      IN	R24,0x39
    0050 6180      ORI	R24,0x10
    0051 BF89      OUT	0x39,R24
(0021) 	SREG = 0x80;
    0052 E880      LDI	R24,0x80
    0053 BF8F      OUT	0x3F,R24
(0022) 	TCCR1A = 0x00;
    0054 2422      CLR	R2
    0055 BC2F      OUT	0x2F,R2
(0023) 	TCCR1B = 0x08;				/*定时器工作在CTC计数器模式*/
    0056 E088      LDI	R24,0x8
    0057 BD8E      OUT	0x2E,R24
(0024) 	TCCR1B |= 0x02;				/*设置定时器的分频值为8分频*/
    0058 B58E      IN	R24,0x2E
    0059 6082      ORI	R24,2
    005A BD8E      OUT	0x2E,R24
    005B 9508      RET
(0025) }
(0026) 
(0027) void main(void) {
(0028) 
(0029) 	DDRA = 0x00;				/*方向输入*/
_main:
    005C 2422      CLR	R2
    005D BA2A      OUT	0x1A,R2
(0030) 	PORTA = 0xFF;				/*打开上拉*/
    005E EF8F      LDI	R24,0xFF
    005F BB8B      OUT	0x1B,R24
(0031) 	DDRB = 0xFF;				/*方向输出*/
    0060 BB87      OUT	0x17,R24
(0032) 	PORTB = 0xFF;				/*电平设置*/
    0061 BB88      OUT	0x18,R24
(0033) 	DDRC = 0x00;
    0062 BA24      OUT	0x14,R2
(0034) 	PORTC = 0xFF;
    0063 BB85      OUT	0x15,R24
(0035) 	DDRD = 0x00;
    0064 BA21      OUT	0x11,R2
(0036) 	PORTD = 0xFF;
    0065 BB82      OUT	0x12,R24
(0037) 	
(0038) 	T1_Init();
    0066 DFE4      RCALL	_T1_Init
(0039) 	SEI();						/*中断使能*/
    0067 9478      BSET	7
(0040) 	
(0041) 	while (1);
    0068 CFFF      RJMP	0x0068
    0069 9508      RET
_Int_TCCR1A:
    006A 922A      ST	R2,-Y
    006B 938A      ST	R24,-Y
    006C 939A      ST	R25,-Y
    006D B62F      IN	R2,0x3F
    006E 922A      ST	R2,-Y
(0042) }
(0043) 
(0044) /*定时器T1 TCCR1A组比较匹配中断*/
(0045) #pragma interrupt_handler Int_TCCR1A: 7
(0046) void Int_TCCR1A(void) {
(0047) 
(0048) 	static unsigned char i;
(0049) 	
(0050) 	if (i > 20) {
    006F E184      LDI	R24,0x14
    0070 90200060  LDS	R2,i
    0072 1582      CP	R24,R2
    0073 F440      BCC	0x007C
(0051) 		PORTB ^= (1 << PB1);
    0074 E082      LDI	R24,2
    0075 B228      IN	R2,0x18
    0076 2628      EOR	R2,R24
    0077 BA28      OUT	0x18,R2
(0052) 		i = 0;
    0078 2422      CLR	R2
    0079 92200060  STS	i,R2
(0053) 		}
    007B C005      RJMP	0x0081
(0054) 	else {
(0055) 		i ++;
    007C 91800060  LDS	R24,i
    007E 5F8F      SUBI	R24,0xFF
    007F 93800060  STS	i,R24
(0056) 		}
FILE: <library>
    0081 9029      LD	R2,Y+
    0082 BE2F      OUT	0x3F,R2
    0083 9199      LD	R25,Y+
    0084 9189      LD	R24,Y+
    0085 9029      LD	R2,Y+
    0086 9518      RETI