触摸按键问题

只看该作者 · 2012-7-11 08:04

PTC_ON
PTC_OFF 值怎么确定啊 !  告诉指点！！！！！！
现在的值不对！麻烦指点  谢谢！！！

#include<pic.h>
#define uchar unsigned char
#define uint unsigned int
__CONFIG(0011101111000100);
const uchar dofly_DuanMa[]={0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x90};//  0xBF,----  0-9
const uchar dofly_WeiMa[]={0x38,0x34,0x2C,0x1C};
//const uchar TempData[4];
void display(uint num);
void delay(uint x);

uint Index=0;                                  //通道
//uint Cap_Value;                               //当前扫描按键值
uchar AvgIndex ;                               //频率计数
void touchkey();                               //按键判断函数
#define PCT_ON 8
#define PCT_OFF  7
volatile unsigned int  Cap_Avg[]={0,0,0,0,0,0};                //平均
volatile unsigned  int  Cap_Value[]={0,0,0,0,0,0};                //当前值区
uchar key0,key1,key2,key3,key4,key5;

//=======按键寄存器初始化======
//=======TMR0定时  TMR1计数====
void Cap_Init(void)
{

CPSCON0=0B10001100;       // 使能CPS模块电容通道
CPSCON1=0B00000101;       //选择CPS0-5通道
OPTION_REG=0B11010011;    // TMR0 FOSC/4时钟分频1:16
TMR0=0x65;
TMR0IF=0;
TMR0IE=1;                //使能
T1CON=0B11000100;       //TMR1 电容触摸时钟通道 TMR1ON打开
T1GCON=0B00000000;       //不用比较器
TMR1IF=0;
TMR1IE=0;                //关
}

//=======按键判断函数==========
void  cap_ISR()                                     //百分比判断法
{
uint percent;
  percent=(Cap_Avg[Index]-Cap_Value[Index]);
if(percent<0)
   {
   percent=0;
   }
else
   {
   percent=percent*100;
   percent=percent/Cap_Avg[Index];
   }
  if(percent<PCT_OFF)                                  //无键按下
   {
   switch(Index)
         {
         case 0:key0=0; break;
         case 1:key1=0; break;
         case 2:key2=0; break;
         case 3:key3=0; break;
         case 4:key4=0; break;
         case 5:key5=0; break;
         default:break;
         }
   if(AvgIndex<2)    AvgIndex++;
   else             AvgIndex=0;
   if(AvgIndex==2)
   Cap_Avg[Index]=Cap_Avg[Index]+(Cap_Value[Index]-Cap_Avg[Index])/16;
   }
else if(percent>PCT_ON)
   {
   switch(Index)
         {
            case 0:key0=1; break;
            case 1:key1=1; break;
            case 2:key2=1; break;
            case 3:key3=1; break;
            case 4:key4=1; break;
            case 5:key5=1; break;
            default:break;
         }
   }

}

//=======计数通道===============
void SetNext(void)
{
  if(Index==5)  Index=0;
  else       Index++;
CPSCON1=Index;       //通道
}
//========TMR1启动函数==========
void RestartTimers(void)
{
TMR1ON=0;
TMR1H=0;
TMR1L=0;
TMR1ON=1;    //TRM1使能
}
//========中断函数==============
void interrupt System()
{
if(TMR0IE&&TMR0IF)             //4MHz  2.5ms
{
TMR0IF=0;
TMR0=0x65;                   //初值100
TMR1ON=0;                   //TMR1关闭
Cap_Value[Index]=(TMR1H<<8)+TMR1L; //当前值读取振荡频率TMR1值

cap_ISR();                   //按键判断函数
SetNext();                   //通道设置
RestartTimers();             //重启TMR1
CLRWDT();                   //清数据
  }
}

//================延时函数===================
void delay(uint x)
{
uint a,b;
for(a=x;a>0;a--)
   for(b=10;b>0;b--);
}
//========显示函数================
void display(uint num)
{
   uchar DAT,key;
   uint i,k;
   TRISA=0XFF;          //清除重影
   PORTC=0;
   TRISC=1;
   DAT=dofly_DuanMa[num];
   for(i=8;i>0;i--)
   {
      key=DAT&0x01;
      RC7=0;
      if(!key)
         RC6=1;
      else RC6=0;
      RC7=1;
      DAT=DAT>>1;
   }
   PORTA=dofly_WeiMa[num];// 00000010 RA5到RA2
   TRISA=1;

   delay(100);
   }
//=============主函数===============
void main()
{
   //uint j=0;
   //System_Init();    //系统初始化
//CLRWDT();             //WDT 门狗
   Cap_Init();          //中断初始化
   GIE = 1;             //总中断允许
   PEIE = 1;             //外设中断允许
//display(0xBF);
while(1)
   {
   if(key0==1)
      display(0);
   if(key1==1)
      display(1);

// if(key2==1)
   //    display(2);
// if(key3==1)
//    display(3);

   // if(key5==1)
   //  display(2);


   }
}