0-30V 4A单片机数控稳压电源设计资料 -

/***********************************************************************
名字： main.c
作者：春风
创建日：2008-8-15
工程：数控稳压电源
***********************************************************************/
#include"reg52.h"
//#include"math.h"
#include"stdlib.h"
#include"function.h"
sbit RS = P1^4;
sbit RW = P1^5;
sbit E = P1^6;
#define DBUS P0
sbit clk_574_1 = P2^3;
//sbit clk_574_2 = P1^3;
//sbit lcd_rs = P1^4;
uint idac;
idata uchar GOUT[7];
idata float temp1;
idata float dac_temp;
idata float sheding_temp;
idata float sheding_temp1;
char code dx516[3] _at_ 0x003b;//这是为了仿真设置的(大虾仿真器)
/************************************************************************************
把浮点数拆开存储指针型数据
输入浮点数，方式0：设定值，1：检测值
************************************************************************************/
void chai(float x,bit y)
{
uint i;
for(i = 0;i < 7;i ++)
GOUT[i] = 0;
if(y == 0)
{
i = x / 10;
if(i == 0)
GOUT[0] = ' ';
else
GOUT[0] = i + '0';
GOUT[1] = (int)x % 10 + '0';
x = x * 10;
GOUT[3] = (int)x % 10 + '0';
x = x * 10;
if(((int)x % 10) >= 5 )// 防止后面大于4的数被舍去
{GOUT[3] = GOUT[3] + 1;}
else
{;}
GOUT[4] = ' ';
GOUT[5] = ' ';
}
else
{
i = x / 10;
if(i == 0)
GOUT[0] = ' ';
else
GOUT[0] = i + '0';
GOUT[1] = (int)x % 10 + '0';
x = x * 10;
GOUT[3] = (int)x % 10 + '0';
x = x * 10;
GOUT[4] = (int)x % 10 + '0';
x = (x * 10);
GOUT[5] = (unsigned int)x % 10 + '0';
}
GOUT[2] = '.';
GOUT[6] = '\0';
}
/************************************************************************************
//向LCM发送一个字符串,长度64字符之内。
************************************************************************************/
void lcm_w_word(uchar x,uchar y,uchar *str)
{
x = x+y;
w_code(x);
while(*str != '\0')
{
w_data(*str++);
}
*str = 0;
}
/************************************************************************************
显示设定电压
************************************************************************************/
void disp_sheding()
{
lcm_w_word(0x90,0x00,"设定：");
sheding_temp1 = sheding_temp + 0.0005;//------加0.0005修正有时显示.0999
chai(sheding_temp1,1);
lcm_w_word(0x90,3,GOUT);
w_code(0x96);
w_data('V');
}
/************************************************************************************
AD的16位整形数转换成浮点电压或电流值
************************************************************************************/
float adjisuan_U(uint x)
{
temp1 = 11.990 / 0x5e1f;
temp1 = x * temp1;
return temp1;
}
float adjisuan_I(uint x) //
{
temp1 = 0.899 / 0x253d;
temp1 = (x * temp1)-0.005;
return temp1;
}
/************************************************************************************
*
*函数功能:输入浮点数
*
************************************************************************************/
float scanf_float(void)
{
static uchar i = 0;
static uchar x[5] = {'0','0','0','0','0'};
static bit k = 1;
uchar temp1,temp2;
temp1 = key_sm();
temp2 = key_sm();
if((temp2 == 0xff) || (temp1 != temp2))
{
k = 1;
return(atof(x));
}
else if(k)
{
k = 0;
x[i] = temp1;
i ++;
if((temp1 == key_esc) || (i == 4))
{
x[0] = '0';
x[1] = '0';
x[2] = '0';
x[3] = '0';
x[4] = '0';
i = 0;
}
return(atof(x));
}
}
/************************************************************************************
扫描按键，并根据键值修改DAC的电压
************************************************************************************/
void key_dac()
{
uchar key_qiao;
key_qiao = key_sm();
switch(key_sm())
{
case key_shang:dac_temp = dac_temp + 1.0;break;//---按下上键电压加1V
case key_xia :dac_temp = dac_temp - 1.0;break;//---按下下键电压减1
case key_zuo :dac_temp = dac_temp - 0.1;break;//---按下左键电压减0.1
case key_you :dac_temp = dac_temp + 0.1;break;//---按下右键电压加0.1
case key_0 :dac_temp = 0; break;//---按下0键电压归0
default: key_qiao = 0xff;
}
if(key_qiao != 0xff) // 10月1日这里原来是0x00就读AD不正常
{
RS = 1;
RW = 0; //--------避免液晶屏干扰数据总线
if(dac_temp < 0){dac_temp = 0;} //----判断电压低于0大于30时把数据归0
if(dac_temp >= 30.10){dac_temp = 0;}
sheding_temp = dac_temp ;
disp_sheding();
idac = conver(dac_temp);
dac(idac);
delay(50000);
}
}
/************************************************************************************
主函数
************************************************************************************/
main()
{
lcd_rst(0);
rst_ad();
dac_temp = 0 ;
RS = 1;
RW = 0; //--------避免液晶屏干扰数据总线
dac(conver(dac_temp)); //吸合低压继电器并输出0V
LED_ONOFF(1);// 打开背光源
set_7705_ch(0);
read_AD_data(0x38);
set_7705_ch(1);
read_AD_data(0x39);
disp_sheding();//显示设定电压
while(1)
{
lcm_w_word(0x80,0x02,"稳压电源");
lcm_w_word(0x90,0x00,"设定：");
lcm_w_word(0x88,0x00,"电压：");
lcm_w_word(0x98,0x00,"电流：");
write_ad(0x10);
write_ad(0x04);
adjisuan_U(read_AD_data(0x38));
chai(temp1,1);
lcm_w_word(0x88,3,GOUT);
key_dac();
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