netscan.c

keil c 开发的典型动态LED显示屏控制器,cpu为51系列

/*------------------------------------------------------------------------*/
/* for M8 cpu              */
/* 2006/4/25   by chenchungen                 */
/*------------------------------------------------------------------------*/
#include <intrins.h>
#include "c8051f310_init.h"
#include "PortDef.h"
#include "comm.h"
#include "GetDot.h"
#include "Delay.h"

#define TH0_VALUE ((65536-25*245)/256)    /* 250us timer */
#define TL0_VALUE ((65536-25*245)%256)


unsigned char xdata DotRam1[288];
unsigned char xdata DotRam2[288];
unsigned char Line=15;
unsigned char Number = 0;
unsigned char MyNumber = 0;
unsigned char Light = 0;
unsigned int  CountTime = 0;
unsigned int  DownTime = 0;
unsigned int  Times = 0;
unsigned char Scan = 0;
unsigned char TestTimes = 0;

bit Test = 0;
bit TestFlag = 0;
bit CutDownEn = 0;
bit Close=0;
bit CutDown=0;
bit Bar=0;
bit OneSec=0;
bit Hold = 0;
bit Great = 0;
 
/*------------------------------------------------------------------------*/
				
void timer0(void) interrupt 1	//	0.25ms  
{
  TL0 = 0x13;
  TH0 = 0xe8;
  Times++;
  Light++;
  if(Times == 4000){ 
    Times = 0; 
	OneSec = 1;
   }

  if(Light==2) { Light = 0; ScanLed(); }
}


void main( void )
{
  unsigned int i;
 
  EA=0;			 
  Init_Device( );
  Delayms(10);
  Clr_WDT();
  EA = 1;

  for(i=0;i<288;i++){
      DotRam1[i] = 0x00; /* clear displayram*/
      DotRam2[i] = 0x00;
   }

  Bar = 1;

  for(;;) {	
    Clr_WDT( );
	treat_rbuf( );
    send_char( );
	if(TestFlag==1 && Test==0) {
	   TestFlag = 0;
	   for(i=0;i<288;i++){
         DotRam1[i] = 0x00; /* clear displayram*/
         DotRam2[i] = 0x00;
		}
	   Bar = 1;
     }
	if(CutDown) { CutDownEn = 1; CutDown = 0; Times = 0; CountTime = DownTime; }
	if(Hold==1 ||Close==1 || Bar==1 || Great==1) CutDownEn = 0;

	if(	OneSec ) {
	  OneSec = 0;
	  if( CountTime==0 && CutDownEn ==1) { Bar = 1; CutDownEn =0;}

	  TestTimes++;
	  if(TestTimes>13) TestTimes = 0;
	  if(CountTime!=0) CountTime--;
     }

	GenDotRam( );
   }
}