敦晨科技

解决方案：数控稳压电源设计报告

本次数控稳压电源设计基于51单片机，通过控制输出来实现对电源的电压控制和显示功能。主要的设计流程如下：

1. 主要输出部分：通过设置4X4矩阵键盘，可以任意置数、加减和自动步进，实现输出波形的控制。

2. 预置数部分：通过拨码开关来预置电压值。

3. 显示部分：通过51单片机对两位数码管进行动态扫描，实现电压值的显示。

以下是代码实现部分：

```c
#include
#include

#define uchar unsigned char
#define uint unsigned int

uchar aa, bb, cc, dd, jj, ii, jjj, iii, key, j;
uchar time1 = 0;
sbit led1 = P2^0;
sbit led2 = P2^1;
sbit ce = P2^4;

#define timer0_count 0xfc18 //定时器初值，设置time0 1/1000秒中断一次
const seg[10] = {0xc0, 0xf9, 0xa4, 0xb0, 0x99, 0x92, 0x82, 0xf8, 0x80, 0x90}; //数码管的显示
const seg_point[10] = {0x40, 0x79, 0x24, 0x30, 0x19, 0x12, 0x02, 0x78, 0x00, 0x10}; //有小数点的数码管显示
uchar scan1; //用来分别显示2个数码管
uchar scan2;
uchar counter[2] = {0xf1, 0xf2};
uchar vout = 0; //j_片选,vout_电压输出

static void timer0_initialize(void) //timer0的初始化
{
EA = 0; //中断控制器IE－－停止接受中断
TR0 = 0; //停止计时
TMOD = 0x01; //设置工作方式为1
TL0 = (timer0_count & 0x00ff);
TH0 = (timer0_count >> 8); //设置time0 初值
PT0 = 1; //设置timer0高优先级
ET0 = 1; //允许timer0中断
TR0 = 1; //开始计时
EA = 1; //开所有中断
}

void delay(uint t) //tms的延时
{
uchar i;
uint j;
for (j = 0; j < t; j++)
for (i = 0; i < 40; i++)
;
}

void shuc(void)
{
uchar nn;
vout = 2 * (scan2 * 10 + scan1); //输出的数字量
P1 = vout;
for (nn = 0; nn < 250; nn++)
;
nn = 0; //输出是存在D/A转换时间差所以要延时
}

void shaom(void)
{
P3 = 0x0f; //扫描是否有按键按下
if ((P3 & 0x0f) != 0x0f)
dd = 0;
else
dd = 1;
}

void zdbj(void) //自动步进
{
uchar rr;
jj = scan2;
ii = scan1;
shaom();
for (; jj < 10; jj++)
{
for (; ii < 10; ii++)
{
if (dd)
{
scan1 = ii;
scan2 = jj;
shuc();
for (rr = 0; rr < 250; rr++)
{
shaom();
if (dd)
delay(70);
else
break;
}
if (jj == 9 && ii == 9)
{
ii = 0;
jj = 0;
}
}
else
{
jj = 10;
ii = 10;
}
}
ii = 0;
}
jj = 0;
shaom();
for (; dd == 0;)
shaom();
}

void sjb(void) //三角波
{
uchar max;
max = vout;
shaom();
for (; dd;)
{
for (iii = 0; iii < max; iii = iii + 2)
{
P1 = iii;
shaom();
delay(7);
if (dd == 0)
break;
}
if (dd == 0)
break;
for (; iii > 0; iii = iii - 2)
{
P1 = iii;
shaom();
delay(10);
if (dd == 0)
break;
}
if (dd == 0)
break;
}
P1 = max;
shaom();
for (; dd == 0;)
shaom();
}

unsigned char keyscan(void) //键盘扫描函数，使用行列反转扫描法
{
unsigned char cord_h, cord_l; //行列值中间变量
P3 = 0x0f; //行线输出全为0
cord_h = P3 & 0x0f; //读入列线值
if (cord_h != 0x0f) //先检测有无按键按下
{
delay(70); //去抖
if ((P3 & 0x0f) != 0x0f)
{
cord_h = P3 & 0x0f; //读入列线值
P3 = cord_h | 0xf0; //输出当前列线值
cord_l = P3 & 0xf0; //读入行线值
while ((P3 & 0xf0) != 0xf0) //等待松开并输出
{
time1 = time1 + 1;
return (cord_h + cord_l); //键盘最后组合码值
}
}
}
return (0); //返回该值
}

void timer0_isr(void) interrupt 1 //timer0中断
//用于LED数码管的动态显示
{
TR0 = 0; //停止时钟0
P2 = counter[j];
switch (j)
{
case 0:
P0 = seg[scan1];
break;
case 1:
P0 = seg_point[scan2];
break;
default:
break; //j为其他情况是跳出循环
}
j++;
if (j == 2)
j = 0;
TL0 = (timer0_count & 0x00ff);
TH0 = (timer0_count >> 8); //设置time0 初值
TR0 = 1; //开时钟
}

void main(void)
{
ce = 0;
delay(5);
scan1 = (P3 / 2) % 10;
scan2 = P3 / 20;
ce = 1;
delay(5);
shuc();
timer0_initialize(); //定时器初始化用于LED显示

do
{
key = keyscan();
if (time1 == 1)
switch (key)
{
case 0xee:
aa = 1;
break;
case 0xed:
aa = 2;
break;
case 0xeb:
aa = 3;
break;
case 0xe7:
aa = 4;
break;
case 0xde:
aa = 5;
break;
case 0xdd:
aa = 6;
break;
case 0xdb:
aa = 7;
break;
case 0xd7:
aa = 8;
break;
case 0xbe:
aa = 9;
break;
case 0xbd:
aa = 0;
break;
case 0xbb:
time1--;
break;
case 0xb7: //三角波
{
time1 = 0;
sjb();
}
break;
case 0x7e: //加
{
time1 = 0;
scan1++;
if (scan1 == 10)
{
scan1 = 0;
scan2++;
if (scan2 == 10)
scan2 = 0;
}
shuc();
}
break; //c
case 0x7d: //减
{
time1 = 0;
scan1--;
if (scan1 == -1)
{
scan1 = 9;
scan2--;
if (scan2 == -1)
scan2 = 9;
}
shuc();
}
break;
case 0x7b: //自动步进
{
time1 = 0;
zdbj();
}
break; //e
case 0x77:
time1--;
break;
}
if (time1 == 2)
switch (key)
{
case 0xee:
bb = 1;
break;
case 0xed:
bb = 2;
break;
case 0xeb:
bb = 3;
break;
case 0xe7:
bb = 4;
break;
case 0xde:
bb = 5;
break;
case 0xdd:
bb = 6;
break;
case 0xdb:
bb = 7;
break;
case 0xd7:
bb = 8;
break;
case 0xbe:
bb = 9;
break;
case 0xbd:
bb = 0;
break;
case 0xbb: //确认
{
scan2 = 0;
scan1 = aa;
time1 = 0;
shuc();
}
break;
case 0xb7: //三角波
{
time1 = 0;
sjb();
}
break;
case 0x7e: //加
{
time1 = 0;
scan1++;
if (scan1 == 10)
{
scan1 = 0;
scan2++;
if (scan2 == 10)
scan2 = 0;
}
shuc();
}
break; //c
case 0x7d: //减
{
time1 = 0;
scan1--;
if (scan1 == -1)
{
scan1 = 9;
scan2--;
if (scan2 == -1)
scan2 = 9;
}
shuc();
}
break;
case 0x7b: //自动步进
{
time1 = 0;
zdbj();
}
break; //e
case 0x77:
time1--;
break;
}
;
if (time1 == 12)
switch (key)
{
case 0xee:
time1--;
break;
case 0xed:
time1--;
break;
case 0xeb:
time1--;
break;
case 0xe7:
time1--;
break;
case 0xde:
time1--;
break;
case 0xdd:
time1--;
break;
case 0xdb:
time1--;
break;
case 0xd7:
time1--;
break;
case 0xbe:
time1--;
break;
case 0xbd:
time1--;
break;
case 0xbb: //确认
{
time1 = 0;
scan2 = aa;
scan1 = bb;
time1 = 0;
shuc();
}
break;
case 0xb7: //三角波
{
time1 = 0;
sjb();
}
break;
case 0x7e: //加
{
scan1++;
if (scan1 == 10)
{
scan1 = 0;
scan2++;
if (scan2 == 10)
scan2 = 0;
}
shuc();
}
break; //c
case 0x7d: //减
{
time1 = 0;
scan1--;
if (scan1 == -1)
{
scan1 = 9;
scan2--;
if (scan2 == -1)
scan2 = 9;
}
shuc();
}
break;
case 0x7b: //自动步进
{
time1 = 0;
zdbj();
}
break; //e
case 0x77:
time1--;
break;
}
} while (1);
}
```

以上是基于51单片机的数控稳压电源设计的解决方案。通过控制输出和显示部分，实现了对电源电压的控制和显示功能。