int main(){
  volatile uint8_t x = 0, i = 0;
  uint8_t SevenSegmentArray[10] = {0x3F, 0x06, 0x5B, 0x4F, 0x66, 0x6D, 0x7D, 0x07, 0x7F, 0x6F};
  //Seven Segment
  //Output
  volatile char* dirD;
  dirD = 0x2A;
  *dirD = 0xFF;

  volatile char* outD;
  outD = 0x2B;
  *outD = 0x00;

  //Input
  volatile char* dirC = NULL;
  dirC = 0x27;
  *dirC = 0x00;
  volatile char* inpC = NULL;
  inpC = 0x26;
  *inpC = 0x00;

  while(1){
    x = *inpC;
    delay_Own(50);

    if((x & 0x01) == 0x01){
      i++;
      if(i == 10){
        i = 0;
      }
    }
    *outD = SevenSegmentArray[i];

    
  }
}
void delay_Own(uint32_t delayMicro){
  for(volatile uint32_t i = 0; i < delayMicro; i++)
    for(volatile uint32_t j = 0; j < 1275; j++);
}