DA转换实验.docx
- 文档编号:330130
- 上传时间:2023-04-29
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DA转换实验.docx
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DA转换实验
一、实验目的和要求
1、掌握单片机与DAC0832的接口设计方法。
2、掌握Proteus软件与Keil软件的使用方法
二、设计要求
1、用Proteus软件画出电路原理图,在单片机的外部扩展片外三总线,并通过片外三总线与0832接口
2、在单片机的外部扩展一个4个按键的键盘
3、按下K0,产生连续方波信号
4、按下K1,产生连续锯齿波信号
5、按下K2,产生连续三角波信号
6、按下K3,产生连续正弦波信号
7、通过外接示波器观察波形
三、电路原理图
四、实验程序流程框图和程序清单
#include<>
#include<>
#defineuintunsignedint
#defineucharunsignedchar
#defineDAC0832XBYTE[0xfffe]
sbitk0=P1^0;
sbitk1=P1^1;
sbitk2=P1^2;
sbitk3=P1^3;
sbitk4=P1^4;
sbitk5=P1^5;
unsignedcharmm=0;
unsignedcharflag=0;
unsignedcharx,y;
ucharcodeSETTAB[]=
{0x7F,0x82,0x85,0x88,0x8B,0x8F,0x92,0x95,0x98,0x9B,0x9E,0xA1,0xA4,0xA7,0xAA,0xAD
0xB0,0xB3,0xB6,0xB8,0xBB,0xBE,0xC1,0xC3,0xC6,0xC8,0xCB,0xCD,0xD0,0xD2,0xD5,0xD7,0xD9,0xDB,0xDD,0xE0,0xE2,0xE4,0xE5,0xE7,0xE9,0xEB,0xEC,0xEE,0xEF,0xF1,0xF2,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFB,0xFC,0xFD,0xFD,0xFE,0xFE,0xFE,0xFE,0xFE,0xFE,0xFE,0xFE,0xFE,0xFE,0xFE,0xFD,0xFD,0xFC,0xFB,0xFB,0xFA,0xF9,0xF8,0xF7,0xF6,0xF5,0xF4,0xF2,0xF1,0xEF,0xEE,0xEC,0xEB,0xE9,0xE7,0xE5,0xE4,0xE2,0xE0,0xDD,0xDB,0xD9,0xD7,0xD5,0xD2,0xD0,0xCD,0xCB,0xC8,0xC6,0xC3,0xC1,0xBE,0xBB,0xB8,0xB6,0xB3,0xB0,0xAD,0xAA,0xA7,0xA4,0xA1,0x9E,0x9B,0x98,0x95,0x92,0x8F,0x8B,0x88,0x85,0x82,0x7F,0x7C,0x79,0x76,0x73,0x6F,0x6C,0x69,0x66,0x63,0x60,0x5D,0x5A,0x57,0x54,0x51,0x4E,0x4B,0x48,0x46,0x43,0x40,0x3D,0x3B,0x38,0x36,0x33,0x31,0x2E,0x2C,0x29,0x27,0x25,0x23,0x21,0x1E,0x1C,0x1A,0x19,0x17,0x15,0x13,0x12,0x10,0x0F,0x0D,0x0C,0x0A,0x09,0x08,0x07,0x06,0x5,0x04,0x03,0x03,0x02,0x01,0x01,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x01,0x02,0x03,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0A,0x0C,0x0D,0x0F,0x10,0x12,0x13,0x15,0x17,0x19,0x1A,0x1C,0x1E,0x21,0x23,0x25,0x27,0x29,0x2C,0x2E,0x31,0x33,0x36,0x38,0x3B,0x3D,0x40,0x43,0x46,0x48,0x4B,0x4E,0x51,0x54,0x57,0x5A,0x5D,0x60,0x63,0x66,0x69,0x6C,0x6F,0x73,0x76,0x79,0x7C};
voiddelayMS(uintms)
{
uchari;
while(ms--)
{
for(i=0;i<120;i++);
}
}
Voidfangbo()
{
DAC0832=y;
x++;
if(flag==1)
{y=0xff;
if(x==128)
{
flag=0;
y=0x00;
}
}
else
{y=0x00;
if(x==0)
{
flag=1;
y=0xff;
}
}
}
voidjuchibo()
{
DAC0832=y;
y+=1;
}
voidsanjiaobo()
{
DAC0832=y;
x++;
if(flag==0)
{
y+=2;
if(x==128)
{
flag=1;
y-=2;
}
}
else
{
y-=2;
if(x==0)
{
flag=0;
y=0;
}
}
}
voidsin()
{
DAC0832=SETTAB[y];
y++;
}
voidtixingbo()
{
unsignedinti,j;
for(i=0;i<=128;i++)
{
DAC0832=i;
}
for(j=0;j<=i;j++)
{
DAC0832=i;
}
for(i=128;i>0;i--)
{
DAC0832=i;
}
for(j=0;j<=128;j++)
{
DAC0832=i;
}
}
voidguanbo()
{
ucharj;
DAC0832=j;
j=0xff;
}
voidread_key()
{
if(k0==0)
{delayMS(10);
if(k0==0)
{mm=1;
while(k0==0);
}
}
elseif(k1==0)
{delayMS(10);
if(k1==0)
{mm=2;
while(k1==0);
}
}
elseif(k2==0)
{delayMS(10);
if(k2==0)
{mm=3;
while(k2==0);
}
}
elseif(k3==0)
{delayMS(10);
if(k3==0);
{mm=4;
while(k3==0);
}
}
elseif(k4==0)
{delayMS(10);
if(k4==0);
{mm=5;
while(k4==0);
}
}
elseif(k5==0)
{delayMS(10);
if(k5==0);
{mm=6;
while(k5==0);
}
}
}
voidmain()
{
TMOD=0x02;
TH0=156;
TL0=156;
TR0=1;
ET0=1;
EA=1;
mm=0;
while
(1)
{read_key();
}
}
voidt0()interrupt1using2
{switch(mm)
{case1:
fangbo();break;
case2:
juchibo();break;
case3:
sanjiaobo();break;
case4:
sin();break;
case5:
tixingbo();break;
case6:
guanbo();break;
default:
break;
}
}
程序流程图:
五、实验结果
1方波
2锯齿波
3三角波
4正弦波
5梯形波
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