Question

用DAC0832实现多种波形的输出（汇编程序）

我的课程设计题目：多波信号发生器，课程设计的内容和要求：1，用DAC0832实现多种波形的输出，2，实现锯齿波，三角波，方波，梯形波的输出，3，编写具体的汇编程序，画出流程图，4，撰写课程设计报告
急啊，高手指点下啊，我不吝啬分数的，给100的，前提是回答的好才行啊。

Answer 1

汇编没有，C语言的做过。汇编只有正弦波的。

#include "reg52.h"
#define uchar unsigned char
#define uint unsigned int

unsigned char code table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71,0x00}; //共阴极0~9对应16进制数
//=============正弦波数据====================
uchar code sin_tab[256]=
{
0x80, 0x83, 0x86, 0x89, 0x8c, 0x8f, 0x92, 0x95, 0x98, 0x9c, 0x9f, 0xa2, 0xa5, 0xa8, 0xab, 0xae,
0xb0, 0xb3, 0xb6, 0xb9, 0xbc, 0xbf, 0xc1, 0xc4, 0xc7, 0xc9, 0xcc, 0xce, 0xd1, 0xd3, 0xd5, 0xd8,
0xda, 0xdc, 0xde, 0xe0, 0xe2, 0xe4, 0xe6, 0xe8, 0xea, 0xec, 0xed, 0xef, 0xf0, 0xf2, 0xf3, 0xf4,
0xf6, 0xf7, 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfc, 0xfd, 0xfe, 0xfe, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0xfe, 0xfd, 0xfc, 0xfc, 0xfb, 0xfa, 0xf9, 0xf8, 0xf7,
0xf6, 0xf5, 0xf3, 0xf2, 0xf0, 0xef, 0xed, 0xec, 0xea, 0xe8, 0xe6, 0xe4, 0xe3, 0xe1, 0xde, 0xdc,
0xda, 0xd8, 0xd6, 0xd3, 0xd1, 0xce, 0xcc, 0xc9, 0xc7, 0xc4, 0xc1, 0xbf, 0xbc, 0xb9, 0xb6, 0xb4,
0xb1, 0xae, 0xab, 0xa8, 0xa5, 0xa2, 0x9f, 0x9c, 0x99, 0x96, 0x92, 0x8f, 0x8c, 0x89, 0x86, 0x83,
0x80, 0x7d, 0x79, 0x76, 0x73, 0x70, 0x6d, 0x6a, 0x67, 0x64, 0x61, 0x5e, 0x5b, 0x58, 0x55, 0x52,
0x4f, 0x4c, 0x49, 0x46, 0x43, 0x41, 0x3e, 0x3b, 0x39, 0x36, 0x33, 0x31, 0x2e, 0x2c, 0x2a, 0x27,
0x25, 0x23, 0x21, 0x1f, 0x1d, 0x1b, 0x19, 0x17, 0x15, 0x14, 0x12, 0x10, 0xf, 0xd, 0xc, 0xb ,
0x9, 0x8, 0x7, 0x6, 0x5, 0x4, 0x3, 0x3, 0x2, 0x1, 0x1, 0x0, 0x0, 0x0, 0x0, 0x0 ,
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x1, 0x1, 0x2, 0x3, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8 ,
0x9, 0xa, 0xc, 0xd, 0xe, 0x10, 0x12, 0x13, 0x15, 0x17, 0x18, 0x1a, 0x1c, 0x1e, 0x20, 0x23,
0x25, 0x27, 0x29, 0x2c, 0x2e, 0x30, 0x33, 0x35, 0x38, 0x3b, 0x3d, 0x40, 0x43, 0x46, 0x48, 0x4b,
0x4e, 0x51, 0x54, 0x57, 0x5a, 0x5d, 0x60, 0x63, 0x66, 0x69, 0x6c, 0x6f, 0x73, 0x76, 0x79, 0x7c,
};
//三角波信号数据表
uchar code thr_tab[32]=
{
0x00,0x0f,0x1f,0x2f,0x3f,0x4f,0x5f,0x6f,0x7f,0x8f,0x9f,0xaf,0xbf,0xcf,0xdf,0xef,
0xff,0xef,0xdf,0xcf,0xbf,0xaf,0x9f,0x8f,0x7f,0x6f,0x5f,0x4f,0x3f,0x2f,0x1f,0x0f
};
//-------------------------------------------------------------------------------------------------------
//锯齿波信号数据表
uchar code jc_tab[33]=
{
0x00,0x08,0x0f,0x18,0x1f,0x28,0x2f,0x38,0x3f,0x48,0x4f,0x58,0x5f,0x68,0x6f,0x78,
0x7f,0x88,0x8f,0x98,0x9f,0xa8,0xaf,0xb8,0xbf,0xc8,0xcf,0xd8,0xdf,0xe8,0xef,0xf8,0xff
};
sbit LED4=P2^7;
sbit LED3=P2^6;
sbit LED2=P2^5;
sbit LED1=P2^4;

int temp1; //实际温度
int conter=0; //LED占空比计数
unsigned char tabArry[4]; //保存显示数据
//按键口申明
sbit k1=P2^0;
sbit k2=P2^1;
sbit LED=P2^2;
sbit mode=P3^2;

char flag=1; //按键标志
int keycount=0; //按键计数
unsigned char waveth,wavetl;
unsigned int mbjs,wavecount,frecount=500;
//毫秒延时程序
void delayms(int ms)
{
uchar i;
while(ms--)
{
for(i=250;i>0;i--);
}
}
//数据分位
void change(char ch1,unsigned int ch)
{
tabArry[0]=ch1;
tabArry[1]=ch%1000/100;
tabArry[2]=ch%100/10;
tabArry[3]=ch%10;
}
//键盘扫描
void keyscan()
{
if(flag==1)
{
if(mode==0) //用mode切换温度和波形
{
delayms(10);
if(mode==0)
{
flag=0;
keycount++;
if(keycount>=4) keycount=0;
//if(keycount>2) ET1=1;
//else ET1=0;
}
}

if(k1==0)
{
delayms(10);
if(k1==0)
{
flag=0;
switch(keycount)
{
case 0:
//case 4:
// ET1=1;
frecount++;
if(frecount>1000) frecount=0;
change(0x0d,frecount);
break;
case 1:
// case 6:
frecount++;
if(frecount>1000) frecount=0;
change(0x0e,frecount);
break;
case 2:
frecount++;
if(frecount>1000) frecount=0;
change(0x0f,frecount);
break;
case 3:
frecount++;
if(frecount>1000) frecount=0;
change(0x05,frecount);
break;
}
}
}
if(k2==0)
{
delayms(10);
if(k2==0)
{
flag=0;
switch(keycount)
{
case 0:
// ET1=1;
frecount--;
if(frecount<0) frecount=999;
change(0x0d,frecount);
waveth=(65536-31250/frecount)/256;
wavetl=(65536-31250/frecount)%256;
break;
case 1:
frecount--;
if(frecount<0) frecount=999;
change(0x0e,frecount);
waveth=(65536-31250/frecount)/256;
wavetl=(65536-31250/frecount)%256;
break;
case 2:
frecount--;
if(frecount<0) frecount=999;
change(0x0f,frecount);
waveth=(65536-31250/frecount)/256;
wavetl=(65536-31250/frecount)%256;
break;
case 3:
frecount--;
if(frecount<0) frecount=999;
change(0x05,frecount);
waveth=(65536-31250/frecount)/256;
wavetl=(65536-31250/frecount)%256;
break;

}
}
}

}
if(k1!=0 && k2!=0 && mode!=0) flag=1;

}
void display()
{
// int i;
// uchar ch1,ch2;
switch(keycount)
{
case 0:
change(0x0d,frecount);
break;
case 1:
change(0x0e,frecount);
break;
case 2:
change(0x0f,frecount);
break;
case 3:
change(0x05,frecount);
break;

}

/* ch1=0xef;
ch2=0xf0;
for(i=0;i<4;i++)
{
P0= table[tabArry[i]];

// P2 |= ch2;
P2 &= ch1;
ch1<<=1;
delayms(10);
// P2 = P2 | 0xf0;
} */

P0 = table[tabArry[0]];
LED1=0;
delayms(3);
LED1=1;

P0 = table[tabArry[1]];
LED2=0;
delayms(3);
LED2=1;

P0 = table[tabArry[2]];
LED3=0;
delayms(3);
LED3=1;

P0 = table[tabArry[3]];
LED4=0;
delayms(3);
LED4=1;
}
void Timerinit()
{
TMOD=0x01;
// TH0=0xff; //1KHz/256
// TL0=0xfc;
TH0=waveth=(65536-31250/frecount)/256;
TL0=wavetl=(65536-31250/frecount)%256;
EA=1;
ET0=1;
TR0=1;
}
//主函数
void main()
{
Timerinit();
while(1)
{
keyscan();
display();
}
}

void Timer0() interrupt 1
{
TH0=waveth;
TL0=wavetl;
if (keycount==0)
{
wavecount=0;
P1 = sin_tab[mbjs];
mbjs+=8;
if(mbjs>=256)
{
mbjs=0;
}
}
else if(keycount==1)
{
wavecount=0;
P1 = thr_tab[mbjs];
mbjs++;
if(mbjs>=32)
{
mbjs=0;
}
}
else if(keycount==2)
{
wavecount=0;
P1 = jc_tab[mbjs];
mbjs++;
if(mbjs>=32)
{
mbjs=0;
}
}
}