kaiguan.txt

使用PWM控制器SG3524设计并制作了一种推挽型DC/DC变换器

#include <c8051f020.h>
#include <intrins.h>
sbit DQ=P0^0;
sbit LED=P0^1;
sfr   LCDDATA=0xf8;
sbit  LCDBUSY=P3^4;     //LCD忙标志位
sbit  LCDREQ=P3^3;      //LCD请求标志位
sbit  LCDRES=P3^5;      //LCD复位线
unsigned char tempL=0;  //设为全局变量
unsigned char tempH=0;  
float temperature;//温度值保存在temperature里
void Device_init() 
{ SFRPAGE=0x0F;
  P3=0x10;/*P3^4为读*/
  P3MDOUT = 0x28;/*P3^4,P3^5为推挽输出，P3^4为漏极开路，配置为数字输入口*/      
  P7MDOUT = 0xff;  
  P0MDOUT=0xfe;//P0^0设为漏极输出
  P0=0xff;//P0^0为数字输入
  XBR2    = 0x40;/*使能交叉开关*/
}
void Oscillator_Init()
{
  unsigned int i = 0;
  SFRPAGE=0x0F;
  OSCXCN    = 0x67;/*使能外部振荡器*/
  for (i = 0; i < 3000; i++); /*等待至少1ms*/ 
  while ((OSCXCN & 0x80) == 0);/*查询XTLVLD是否由0到1*/
  CLKSEL=0x01;/*将系统时钟切换到外部振荡器*/
}
void delay_us(unsigned int time)
{
 time*=2;
 for(;time>0;time--)
 _nop_();
 }
void delay_ms(unsigned int i)
 {while(--i)
  delay_us(1000);
  }
void delay(unsigned int time)
{
   unsigned int n;
   n=0;
   while(n<time)
   {n++;}
   return;
   }
  void LCD_init()
{
 LCDRES=0;
 delay_ms(5);
 LCDRES=1;
 LCDREQ=0;
 LCDBUSY=0;
 delay_ms(5);
}
void write_data(unsigned char data writedata)
{SFRPAGE=0x0F;
 while(LCDBUSY==1);//查询LCDBUSY是否为0
 LCDREQ=0;//请求信号置零
 LCDDATA=writedata;//将数据写到LCDDATA数据线上
 delay_us(40);//稍微延时
 LCDREQ=1;//请求信号置高电平，请求LCD处理数据
 delay_us(400);//延时，保证CUP将数据都送出
 while(LCDBUSY==1);//查询LCDBUSY是否为零
 LCDREQ=0;//准备第二次传送数据
}
void send_hz(unsigned char x,unsigned char y,unsigned char *hz_p)
{
 while((*hz_p)!=0)
 {
  write_data(0xf0);
  write_data(x+0x02);
  write_data(y);
  write_data(*hz_p-0xa0);
  hz_p++;
  write_data(*hz_p-0xa0);
  hz_p++;
  if(x<0x07)
   x++;
  else
  {
    x=0x00;
    y++;
   if(y==0x05)
   y=0;
   }
  }
}

void send_ascii16(unsigned char x,unsigned char y,unsigned char ascii)
{
  write_data(0xF9);
  write_data(x+0x04);
  write_data(y);
  write_data(ascii);//写要显示的ASCII码;
}

void send_asc16str(unsigned char x,unsigned char y,unsigned char *ascii)
{
  while((*ascii)!=0)
  {
    write_data(0xF9);
    write_data(x+0x04);
    write_data(y);
    write_data(*ascii);//写要显示的ASCII码;
	ascii++;
    if(x<0x0f)
	x++;
	else
    {
	   x=0x00;
	   y+=16;
	   if(y==0x40)
	   y=0;
     }
  }
} 
Init_DS18B20(void)
{
 unsigned char x=0;
 DQ=1;
 delay(8);
 DQ=0;
 delay(85);
 DQ=1;
 delay(14);
 x=DQ;
 delay(20);
 }
 ReadOneChar(void)
 {
 unsigned char i=0;
   unsigned char dat=0;
   for(i=8;i>0;i--)
    {DQ=1;
    delay(1);
    DQ=0;
    dat>>=1;
    DQ=1;
    if{DQ}
    dat|=0x80;
    delay(4);
    }
    return(dat);
    }
  WriteOneChar(unsigned char dat)
  {
    unsigned char i=0;
    for(i=8;i>0,i--)
    {
    DQ=0;
    DQ=dat&0x01;
    delay(5);
    DQ=1;
    dat>>=1;
    }
    delay(4);
   }
   ReadTemperature(void)
   {
    Init_DS18B20();
    WriteOneChar(0xcc);
    WriteOneChar(0x44);
    delay(125);
    Init_DS18B20();
    WriteOneChar(0xcc);
    WriteOneChar(0xbe);
    tempL=ReadOneChar();
    tempH=ReadOneChar();
    temperature=((tempH*256)+tempL)*0.0625;
    delay(200);
    return(temperature);
    }
   void main()
{
 unsigned int data temperture_int, temperture_frac; // 温度的整数和小数部分
 unsigned char data temperture_1,temperture_2,temperture_3;//LCD显示转换中间变量
 WDTCN=0xde;
 WDTCN=0xad;
 Device_init();
 LCD_init();
 Oscillator_Init();
 send_hz(0,0,"当前温度");
 while(1)
 {
  ReadTemperature(void);
  delay_ms(100);
  temperture=temperture*100;
  temperture_int=temperture/1000;
  send_ascii16(9,16,temperture_int+0x30);
  temperture_frac=temperture-temperture_int;
  temperture_1=temperture_frac/100;
  send_ascii16(10,16,temperture_1+0x30);
  send_ascii16(11,16,'.');
  temperture_2=temperture_frac%100/10;
  send_ascii16(12,16,temperture_2+0x30);
  temperture_3=temperture_frac%100%10;
  send_ascii16(13,16,temperture_3+0x30);
  }
  }