//press any switch (0 to 9) on the keypad and display the number.

#include "ecen.h"

void setup() {
  volatile char *F_dir=0x30, *K_dir=0x107, *A_dir=0x21, *B_dir=0x24;
  *F_dir=0xff, *K_dir=0x00, *A_dir=0xff, *B_dir=0xff;

}

void loop() {
  for(int i=0;i<4;i++){
    outF(1<<i);
    uint8_t col = inK();
    if(col!=0){
       uint8_t press = find_switch(i,col);
       display(press);
    }
  }

}