dac.lst

ATMEL AVR MEGA8 MCU DAC 驱动控制源代码

__start:
__text_start:
    0043 EFCF      LDI	R28,0xFF
    0044 E0D2      LDI	R29,2
    0045 BFCD      OUT	0x3D,R28
    0046 BFDE      OUT	0x3E,R29
    0047 51C0      SUBI	R28,0x10
    0048 40D0      SBCI	R29,0
    0049 EA0A      LDI	R16,0xAA
    004A 8308      STD	Y+0,R16
    004B 2400      CLR	R0
    004C E5E2      LDI	R30,0x52
    004D E0F1      LDI	R31,1
    004E E011      LDI	R17,1
    004F 35E9      CPI	R30,0x59
    0050 07F1      CPC	R31,R17
    0051 F011      BEQ	0x0054
    0052 9201      ST	R0,Z+
    0053 CFFB      RJMP	0x004F
    0054 8300      STD	Z+0,R16
    0055 E3E4      LDI	R30,0x34
    0056 E0F0      LDI	R31,0
    0057 E0A0      LDI	R26,0
    0058 E0B1      LDI	R27,1
    0059 E010      LDI	R17,0
    005A 38E6      CPI	R30,0x86
    005B 07F1      CPC	R31,R17
    005C F021      BEQ	0x0061
    005D 95C8      LPM
    005E 9631      ADIW	R30,1
    005F 920D      ST	R0,X+
    0060 CFF9      RJMP	0x005A
    0061 D0D4      RCALL	_main
_exit:
    0062 CFFF      RJMP	_exit
FILE: C:\调试程序\mega48\DAC\adc.c
(0001) #include<iom48v.h>
(0002) unsigned int adc_rel;//AD转换结果
(0003) unsigned char adc_mux;//AD通道
(0004) extern unsigned int adc_old;
(0005) /*				微秒级延时程序	  		*/
(0006) void delay_us(int time)
(0007) 	 {     
(0008)   	  do
(0009) 	  	{
(0010) 		 time--;
_delay_us:
  time                 --> R16
    0063 5001      SUBI	R16,1
    0064 4010      SBCI	R17,0
(0011) 		}	
(0012)   	  while (time>1);
    0065 E081      LDI	R24,1
    0066 E090      LDI	R25,0
    0067 1780      CP	R24,R16
    0068 0791      CPC	R25,R17
    0069 F3CC      BLT	0x0063
    006A 9508      RET
_delay_ms:
  time                 --> R20
    006B D17C      RCALL	push_gset1
    006C 01A8      MOVW	R20,R16
(0013) 	 }	  
(0014) /*	  		    毫秒级延时程序			*/	 
(0015) void delay_ms(unsigned int time)
(0016) 	 {
    006D C005      RJMP	0x0073
(0017) 	  while(time!=0)
(0018) 	  	  {		
(0019) 		   delay_us(1000);
    006E EE08      LDI	R16,0xE8
    006F E013      LDI	R17,3
    0070 DFF2      RCALL	_delay_us
(0020) 		   time--;
    0071 5041      SUBI	R20,1
    0072 4050      SBCI	R21,0
    0073 3040      CPI	R20,0
    0074 0745      CPC	R20,R21
    0075 F7C1      BNE	0x006E
    0076 D174      RCALL	pop_gset1
    0077 9508      RET
(0021) 		  }
(0022) 	 }		
(0023) //ADC初始化	 
(0024) void adc_init(void)
(0025) {
(0026)  DDRC=0x00;
_adc_init:
    0078 2422      CLR	R2
    0079 B827      OUT	0x07,R2
(0027)  PORTC=0x00; 
    007A B828      OUT	0x08,R2
(0028)  ADCSRA = 0x00; 
    007B 9220007A  STS	0x7A,R2
(0029)  ADMUX =(1<<REFS0)|(adc_mux&0x0f);//选择内部AVCC为基准
    007D 91800154  LDS	R24,adc_mux
    007F 708F      ANDI	R24,0xF
    0080 6480      ORI	R24,0x40
    0081 9380007C  STS	0x7C,R24
(0030)  ACSR  =(1<<ACD);//关闭模拟比较器
    0083 E880      LDI	R24,0x80
    0084 BF80      OUT	0x30,R24
(0031)  ADCSRB=0;
    0085 9220007B  STS	0x7B,R2
(0032)  ADCSRA=(1<<ADEN)|(1<<ADSC)|(1<<ADIE)|(1<<ADPS2)|(1<<ADPS1) ;//64分频
    0087 EC8E      LDI	R24,0xCE
    0088 9380007A  STS	0x7A,R24
    008A 9508      RET
_adc_isr:
    008B 922A      ST	R2,-Y
    008C 923A      ST	R3,-Y
    008D 930A      ST	R16,-Y
    008E 931A      ST	R17,-Y
    008F 932A      ST	R18,-Y
    0090 933A      ST	R19,-Y
    0091 938A      ST	R24,-Y
    0092 939A      ST	R25,-Y
    0093 93EA      ST	R30,-Y
    0094 B62F      IN	R2,0x3F
    0095 922A      ST	R2,-Y
(0033) }
(0034) //ADC完成中断
(0035) #pragma interrupt_handler adc_isr:22     
(0036) void adc_isr(void)
(0037) {
(0038)  static unsigned i;
(0039)  adc_rel+=ADC&0x3ff;
    0096 91800078  LDS	R24,0x78
    0098 91900079  LDS	R25,0x79
    009A 7093      ANDI	R25,3
    009B 90200155  LDS	R2,adc_rel
    009D 90300156  LDS	R3,adc_rel+1
    009F 0E28      ADD	R2,R24
    00A0 1E39      ADC	R3,R25
    00A1 92300156  STS	adc_rel+1,R3
    00A3 92200155  STS	adc_rel,R2
(0040)  ADMUX=(1<<REFS0)|(adc_mux&0x0f);//选择内部AVCC为基准
    00A5 91800154  LDS	R24,adc_mux
    00A7 708F      ANDI	R24,0xF
    00A8 6480      ORI	R24,0x40
    00A9 9380007C  STS	0x7C,R24
(0041)  ADCSRA|=(1<<ADSC);//启动AD转换
    00AB 9180007A  LDS	R24,0x7A
    00AD 6480      ORI	R24,0x40
    00AE 9380007A  STS	0x7A,R24
(0042)  if (i<63)
    00B0 91800152  LDS	R24,i
    00B2 91900153  LDS	R25,i+1
    00B4 338F      CPI	R24,0x3F
    00B5 E0E0      LDI	R30,0
    00B6 079E      CPC	R25,R30
    00B7 F430      BCC	0x00BE
(0043)    i++;
    00B8 9601      ADIW	R24,1
    00B9 93900153  STS	i+1,R25
    00BB 93800152  STS	i,R24
    00BD C015      RJMP	0x00D3
(0044)  else
(0045)    {
(0046)     adc_old=adc_rel/64;//64点平均滤波
    00BE E026      LDI	R18,6
    00BF E030      LDI	R19,0
    00C0 91000155  LDS	R16,adc_rel
    00C2 91100156  LDS	R17,adc_rel+1
    00C4 D168      RCALL	lsr16
    00C5 93100158  STS	adc_old+1,R17
    00C7 93000157  STS	adc_old,R16
(0047) 	i=0;
    00C9 2422      CLR	R2
    00CA 2433      CLR	R3
    00CB 92300153  STS	i+1,R3
    00CD 92200152  STS	i,R2
(0048) 	adc_rel=0;
    00CF 92300156  STS	adc_rel+1,R3
    00D1 92200155  STS	adc_rel,R2
(0049)    }
    00D3 9029      LD	R2,Y+
    00D4 BE2F      OUT	0x3F,R2
    00D5 91E9      LD	R30,Y+
    00D6 9199      LD	R25,Y+
    00D7 9189      LD	R24,Y+
    00D8 9139      LD	R19,Y+
    00D9 9129      LD	R18,Y+
    00DA 9119      LD	R17,Y+
    00DB 9109      LD	R16,Y+
    00DC 9039      LD	R3,Y+
    00DD 9029      LD	R2,Y+
    00DE 9518      RETI
FILE: C:\调试程序\mega48\DAC\dac.c
(0001) //使用内部RC振荡,PB6-G,PB7-DP短路块连接
(0002) //使用INT0/INT1按键改变DAC输出电压大小
(0003) //可以使用ADC0通道测量DAC的输出电压
(0004) //演示了使用PC机对MEGA8开发板进行控制的方法
(0005) #include <iom48v.h>
(0006) #include <macros.h>
(0007) #define osccal 0x9A//内部RC校正常数
(0008) #define Vref   500//参考电压值
(0009) #include"uart.h"
(0010) #include"adc.h"
(0011) unsigned int adc_old;
(0012) //T1初始化程序 
(0013) void timer1_init(void)
(0014) {
(0015)  TCCR1B = 0; //stop
_timer1_init:
    00DF 2422      CLR	R2
    00E0 92200081  STS	0x81,R2
(0016)  TCNT1H = 0; 
    00E2 92200085  STS	0x85,R2
(0017)  OCR1A=0;
    00E4 2433      CLR	R3
    00E5 92300089  STS	0x89,R3
    00E7 92200088  STS	0x88,R2
(0018)  TCCR1A =(1<<WGM11)|(1<<WGM10)|(1<<COM1A1);
    00E9 E883      LDI	R24,0x83
    00EA 93800080  STS	0x80,R24
(0019)  TCCR1B =(1<<CS10);//(1<<WGM13)|(1<<WGM12)|(1<<CS10); //0x1A //start Timer
    00EC E081      LDI	R24,1
    00ED 93800081  STS	0x81,R24
    00EF 9508      RET
_int_isr:
  i                    --> R20
    00F0 D10E      RCALL	push_lset
    00F1 D0F6      RCALL	push_gset1
(0020) } 
(0021) //两个中断向量使用同一个中断处理函数，实现对INT0/INT1按键的处理
(0022) #pragma interrupt_handler int_isr:2 int_isr:3
(0023) void int_isr(void)
(0024) {
(0025)  unsigned char i;
(0026)  delay_ms(10);
    00F2 E00A      LDI	R16,0xA
    00F3 E010      LDI	R17,0
    00F4 DF76      RCALL	_delay_ms
(0027)  i=PIND&0x0c;//键盘消抖动
    00F5 B149      IN	R20,0x09
    00F6 704C      ANDI	R20,0xC
(0028)  if(i==0x0c) 
    00F7 304C      CPI	R20,0xC
    00F8 F409      BNE	0x00FA
(0029)     return;	
    00F9 C039      RJMP	0x0133
(0030)  else
(0031)    {
(0032)     if (i==0x08)//INT0键按下
    00FA 3048      CPI	R20,0x8
    00FB F4C1      BNE	0x0114
(0033) 		    {
(0034) 			 if(OCR1A<0x3ef)
    00FC 91800088  LDS	R24,0x88
    00FE 91900089  LDS	R25,0x89
    0100 3E8F      CPI	R24,0xEF
    0101 E0E3      LDI	R30,3
    0102 079E      CPC	R25,R30
    0103 F450      BCC	0x010E
(0035) 			    OCR1A+=0x10;//递增
    0104 91800088  LDS	R24,0x88
    0106 91900089  LDS	R25,0x89
    0108 9640      ADIW	R24,0x10
    0109 93900089  STS	0x89,R25
    010B 93800088  STS	0x88,R24
    010D C006      RJMP	0x0114
(0036) 		     else
(0037) 			    OCR1A=0x3ff;		
    010E EF8F      LDI	R24,0xFF
    010F E093      LDI	R25,3
    0110 93900089  STS	0x89,R25
    0112 93800088  STS	0x88,R24
(0038) 			}
(0039) 	if (i==0x04)//INT1键按下
    0114 3044      CPI	R20,4
    0115 F4C9      BNE	0x012F
(0040) 		    {
(0041) 			 if(OCR1A>0x10)
    0116 E180      LDI	R24,0x10
    0117 E090      LDI	R25,0
    0118 90200088  LDS	R2,0x88
    011A 90300089  LDS	R3,0x89
    011C 1582      CP	R24,R2
    011D 0593      CPC	R25,R3
    011E F450      BCC	0x0129
(0042) 			    OCR1A-=0x10;//递减
    011F 91800088  LDS	R24,0x88
    0121 91900089  LDS	R25,0x89
    0123 9740      SBIW	R24,0x10
    0124 93900089  STS	0x89,R25
    0126 93800088  STS	0x88,R24
    0128 C006      RJMP	0x012F
(0043) 			 else
(0044) 			    OCR1A=0;	
    0129 2422      CLR	R2
    012A 2433      CLR	R3
    012B 92300089  STS	0x89,R3
    012D 92200088  STS	0x88,R2
(0045) 			}
(0046)     while((PIND&0x0c)!=0x0c)//检查按键释放
    012F B189      IN	R24,0x09
    0130 708C      ANDI	R24,0xC
    0131 308C      CPI	R24,0xC
    0132 F7E1      BNE	0x012F
(0047)        ;
(0048) 	} 
    0133 D0B7      RCALL	pop_gset1
    0134 D0E1      RCALL	pop_lset
    0135 9518      RETI
(0049) }
(0050) //MAIN程序
(0051) void main(void)
(0052) {
(0053)  unsigned char i;
(0054)  unsigned int temp;
(0055)  DDRB=(1<<PB1);    //置输出比较oc1a为高电平
_main:
  temp                 --> R22
  i                    --> R10
    0136 E082      LDI	R24,2
    0137 B984      OUT	0x04,R24
(0056)  DDRD=0xf0;
    0138 EF80      LDI	R24,0xF0
    0139 B98A      OUT	0x0A,R24
(0057)  PORTD=0xff;
    013A EF8F      LDI	R24,0xFF
    013B B98B      OUT	0x0B,R24
(0058)  OSCCAL=osccal;
    013C E98A      LDI	R24,0x9A
    013D 93800066  STS	0x66,R24
(0059)  adc_mux=0;
    013F 2422      CLR	R2