ptz.c

这个是安防用的控制键盘C源程序,采用KEIL C51开发.用于控制前端解码器!

#include"reg52.h"
#include"main.h"

extern bit SoundFlag;
bit TimerFlag;
Uchar TimerCounter;
Uchar SoundCounter=0;
extern Uchar NumbProtocol;

extern void Pelco_D(Uchar i);
extern void YAAN (Uchar i);
extern void PD_2400(Uchar i);
extern void Pelco_P(Uchar i);

/*--------------------------------------------------------------------
                     timer1 interrupt
  --------------------------------------------------------------------*/
void Timer0ISR_1(void) interrupt 1 using 0
{

 TH0=0x3c;                                                 //timer0 50ms 
 TL0=0xb0;
 if(SoundCounter!=0)
 SoundCounter--;

 else
 {
 SoundFlag=0;
 BU=0;
 }
  
 
 if(TimerCounter!=0)                                        //delay 200ms
  TimerCounter--;


 else
 {
 // BU=0;
  TimerFlag=0;
 } 
}

/*---------------------------------------------------------------------*/

void Ptz(Uchar i)
{
 Uchar Temp;
 Temp=i;
 if((Temp<10 || (Temp <22 && Temp>17)) && TimerFlag)
 {
  EA=1;
  ET0=1;
  TR0=1;
 }

  else
 {
  
  TimerFlag=1; 
  TimerCounter=4;
 switch(NumbProtocol)
  {
  case 1: Pelco_D(Temp);
          break;
  case 2: Pelco_P(Temp);
          break;
         
  case 3: YAAN(Temp);
          break;
  case 4: PD_2400(Temp);
          break;
  }
 }
}