pwm.lst

MEGA16 开发包3

__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 940E0051  CALL	_main
_exit:
    004A CFFF      RJMP	_exit
FILE: F:\开发\C程序开发\AVR\PWM\pwm.c
(0001) #include <iom16v.h> 
(0002) #include <macros.h> 
(0003) 
(0004) #define PWM0     PORTD3  //OC0   PB3
(0005) 
(0006) volatile unsigned char T0OCR;       //设置T0的时间值
(0007) 
(0008) /*相位修正模式输出方波,64分频*/
(0009) void timer0_init(void) 
(0010) {
(0011)  OCR0  = T0OCR;       //设定TOP
_timer0_init:
    004B 90200060  LDS	R2,T0OCR
    004D BE2C      OUT	0x3C,R2
(0012)                       // TOP=8000000/(2*64*1000)-1=61.5  选61  1.008KHz(0.992mS)
(0013)                       // TOP=8000000/(2*64*2000)-1=30.25 选30  2.016KHz(0.496ms)
(0014)  TCCR0 = (0<<WGM01)|(1<<WGM00)|(1<<COM01)|(0<<COM00)|(0<<CS02)|(1<<CS01)|(1<<CS00);
    004E E683      LDI	R24,0x63
    004F BF83      OUT	0x33,R24
    0050 9508      RET
(0015) }
(0016) 
(0017) void main(void)
(0018) {
(0019)                                 //上电默认DDRx=0x00,PORTx=0x00 输入，无上拉电阻
(0020)     PORTA =0xFF;                //不用的管脚使能内部上拉电阻。
_main:
    0051 EF8F      LDI	R24,0xFF
    0052 BB8B      OUT	0x1B,R24
(0021)     PORTC =0xFF;
    0053 BB85      OUT	0x15,R24
(0022)     PORTB =~ (1<<PWM0);         
    0054 EF87      LDI	R24,0xF7
    0055 BB88      OUT	0x18,R24
(0023)     DDRB  =  (1<<PWM0);         
    0056 E088      LDI	R24,0x8
    0057 BB87      OUT	0x17,R24
(0024) 
(0025)     T0OCR=0x40;
    0058 E480      LDI	R24,0x40
    0059 93800060  STS	T0OCR,R24
(0026)     timer0_init();
    005B DFEF      RCALL	_timer0_init
(0027)     SEI();                          //使能全局中断
FILE: <library>
    005C 9478      BSET	7
    005D 9508      RET