1602頻率表

ID:71774 · 發(fā)表于 2015-1-27 14:09

#include<reg52.h>             //1602液晶頻率表。這個(gè)用T2計(jì)時(shí)，采用16位自動(dòng)重裝。
#include<stdio.h>
#include<intrins.h>
#define uchar  unsigned char
#define CHECK_BUSY
sbit RS = P1^0;
sbit RW = P1^1;
sbit EN = P1^5;
bit flag;
char  counter,counter2;
void DelayMs(uchar t)
{
int  x,y;
for (x=t;x>0;x--)
  for(y=110;y>0;y--);
}

bit LCD_Check_Busy(void)
{
#ifdef CHECK_BUSY
P0= 0xFF;
RS=0;
RW=1;
EN=0;
_nop_();
EN=1;
return (bit)(P0 & 0x80);
#else
return 0;
#endif
}

void write_Com(uchar com)
{
while(LCD_Check_Busy());
RS=0;
RW=0;
EN=1;
P0= com;
_nop_();
EN=0;
}
void write_dat(uchar dat)
{
while(LCD_Check_Busy());
RS=1;
RW=0;
EN=1;
P0= dat;
_nop_();
EN=0;
}
void LCD_Clear(void)
{
write_Com(0x01);
DelayMs(5);
}
void LCD_Write_Char(uchar x,uchar y,uchar dat)
{
if (y == 0)
  {
  write_Com(0x80 + x);
  }
else
  {
  write_Com(0xC0 + x);
  }
write_dat( dat);
}
void LCD_Write_String(uchar x,uchar y,uchar *s)
{
  while (*s)
  {
LCD_Write_Char(x,y,*s);
s ++;
x++;
  }
}
void LCD_Init(void)
{
write_Com(0x38);
write_Com(0x06);
DelayMs(5);
write_Com(0x0C);
write_Com(0x01);
}
void timer2_init()
{
      T2MOD=0X00;
      TH2=(65536-110592/60)/256;
      TL2=(65536-110592/60)%256;
      RCAP2H=TH2;
      RCAP2L=TL2;
      EA=1;
      ET2=1;
      TR2=1;

}
void Init_Timer0(void)
{
TMOD=0x05;
TH0=0x00;
TL0=0x00;
EA=1;
ET0=1;
TR0=1;
}
main()
{
unsigned  long int a;
char temp[16];
Init_Timer0();
timer2_init();
LCD_Init();
DelayMs(10);
LCD_Clear();
LCD_Write_String(0,0,"Frequency table");
while(1)
   {
      if(flag==1)
         {flag=0;
         a=counter*65536+TH0*256+TL0;
         a*=10;
   sprintf(temp,"FREQ:%08.0f Hz",(float)a);
         LCD_Write_String(0,1,temp);
      counter=0;
            TR0=1;TR2=1;
TH0=0;
            TL0=0;
         }
   }
}
void t0(void) interrupt 1 using 1
{
counter ++;
TH0=0;
TL0=0;
}
void t2(void) interrupt 5 using 2

{ TF2=0;
  counter2++;
  if(counter2==50)
{
  TR0=0;TR2=0;
  counter2=0;
  TH2=(65536-110592/60)/256;
  TL2=(65536-110592/60)%256;

  flag=1;
  }
}

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1602頻率表

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