//ESP - keypad - problems set1
//Use 4 x 4 Keypad and Quard 7 segment display
// 01-Press any switch & display that number // 11 - 11 - 2022
void setup() {
  // put your setup code here, to run once:
   volatile char *dirf,*dirk,*dira,*dirc;
  volatile char *outf,*outa,*outc;
  volatile char *ink;
  volatile long i,j,x;
  volatile char numca[]={0xC0,0xF9,0xA4,0xB0,0X99,0X92,0X82,0xF8,0x80,0x98};
  dirf = 0x30;  dirk = 0x107; dira = 0x21; dirc = 0x27;
 *dirf = 0x0f; *dirk = 0x00; *dira = 0xff; *dirf = 0x0f;
  outa = 0x22; outf = 0x31; outc = 0x28;
  ink = 0x106;
        while(1)
        {
          for(i=0;i<4;i++)
          {
            
            *outf=1 << i;
            x=*ink;
            
            if(*outf==1 && x == 1)
            {
              *outc=0x0f;
              *outa=numca[1];
              for(j=0;j<500000;j++);
              *outc=0x00;
            }
            if(*outf==1 && x == 2)
            {
              *outc=0x0f;
              *outa=numca[2];
              for(j=0;j<500000;j++);
              *outc=0x00;
            }
            if(*outf==1 && x == 4)
            {
              *outc=0x0f;
              *outa=numca[3];
              for(j=0;j<500000;j++);
              *outc=0x00;
            }
            if(*outf==2 && x == 1)
            {
              *outc=0x0f;
              *outa=numca[4];
              for(j=0;j<500000;j++);
              *outc=0x00;
            }
            if(*outf==2 && x == 2)
            {
              *outc=0x0f;
              *outa=numca[5];
              for(j=0;j<500000;j++);
              *outc=0x00;
            }
            if(*outf==2 && x == 4)
            {
              *outc=0x0f;
              *outa=numca[6];
              for(j=0;j<500000;j++);
              *outc=0x00;
            }
            if(*outf==4 && x == 1)
            {
              *outc=0x0f;
              *outa=numca[7];
              for(j=0;j<500000;j++);
              *outc=0x00;
            }
            if(*outf==4 && x == 2)
            {
              *outc=0x0f;
              *outa=numca[8];
              for(j=0;j<500000;j++);
              *outc=0x00;
            }
            if(*outf==4 && x == 4)
            {
              *outc=0x0f;
              *outa=numca[9];
              for(j=0;j<500000;j++);
              *outc=0x00;
            }
            if(*outf==8 && x == 2)
            {
              *outc=0x0f;
              *outa=numca[0];
              for(j=0;j<500000;j++);
              *outc=0x00;
            }
        
        }

        }
}
  

  
 


void loop() {
  // put your main code here, to run repeatedly:

}