Adding "scan "switch to a existing project binary encoder

I have this binary switch (10 pos) based on a encoder which works fine for its purpose

(selecting bcd input to a ham radio transceivers PLL(phase lock loop BCD weighted lines) for selecting correct frequencies )
it out puts the channel number to a tm1637 display (1-10 in decimal) .

what I want to do is add a scan feature so it steps up the "channels" one by one then cycle around back to channel 1 and back on up to ch 10 and so on till A5 goes high (will receive a high from the radios squelch line when the squelch is open receives a signal via a gate buffer in the radio)

So what I am asking is anyone got a snippet of code i can insert into my existing code to start increment of channels when a switch is activated on A6 (used as a digital pin with pullup) until detects a HIGH on A5 (the squelch gate line) and stops at that "channel"

I am fairly new to arduino coding and this below is one of my first real attempts at atmega

digital pins d2-d12 are used for pll bcd weighting (portB and D) encoding

pins A0-A4 are used for the display and encoder

the reset pin sends the radio back to ch 5 when encoder button is pressed (home channel) ..of course when powered up the radio starts up on ch5

please forgive for my rubbish coding in advance !


#include <RotaryEncoder.h>
#include <Arduino.h>
#include <TM1637Display.h>


#define Steps 1
#define Min 1
#define Max 10
// Module connection pins (Digital Pins)
#define CLK A0          //TM1637
#define DIO A1          //TM1637

// The amount of time (in milliseconds) between tests
int lastPos = -1;

RotaryEncoder encoder(A2, A3);  //(A2= CLK,A3 = DT)
TM1637Display display(CLK, DIO);

void setup() {

  Serial.begin(9600);

  Serial.println("Encoder Position");
  encoder.setPosition(5 / Steps);            // start with the value of 5

}

void loop() {

  int k;
  uint8_t data[] = { 0xff, 0xff, 0xff, 0xff };
  uint8_t blank[] = { 0x00, 0x00, 0x00, 0x00 };
  display.setBrightness(0x05);


  encoder.tick();

  // get the current physical position and calc the logical position
  int newPos = encoder.getPosition() * Steps;

  if (newPos < Min) {

    encoder.setPosition(Max / Steps);
    newPos = Max;

  } else if (newPos > Max) {
    encoder.setPosition(Min / Steps);
    newPos = Min;

  }

  if (lastPos != newPos) {
    Serial.print(newPos);
    Serial.println();
    lastPos = newPos;
  }
  //send data to pins

  switch (newPos) {

    case 1:
      //PLL OUTPUTS
      PORTD = B10000100;
      PORTB = B000010;
      // displayed number
      display.showNumberDec(1); // Expect: ___1
      break;

    case 2:
      //PLL OUTPUTS
      PORTD = B10001000;
      PORTB = B000010;
      // displayed number
      display.showNumberDec(2);  // Expect: ___2
      break;

    case 3:
      //PLL OUTPUTS
      PORTD = B10001100;
      PORTB = B000010;
      // displayed number
      display.showNumberDec(3); // Expect: ___3
      break;

    case 4:
      //PLL OUTPUTS
      PORTD = B10010100;
      PORTB = B000010;
      // displayed number
      display.showNumberDec(4); // Expect: ___4
      break;

    case 5:
      //PLL OUTPUTS
      PORTD = B10011000;
      PORTB = B000010;
      // displayed number
      display.showNumberDec(5); // Expect: ___5
      break;

    case 6:
      //PLL OUTPUTS
      PORTD = B10011100;
      PORTB = B000010;
      // displayed number
      display.showNumberDec(6); // Expect: ___6
      break;

    case 7:
      //PLL OUTPUTS
      PORTD = B11100000;
      PORTB = B000010;
      // displayed number
      display.showNumberDec(7); // Expect: ___7
      break;

    case 8:
      //PLL OUTPUTS
      PORTD = B00000000;
      PORTB = B000100;
      // displayed number
      display.showNumberDec(8); // Expect: ___8
      break;

    case 9:
      //PLL OUTPUTS
      PORTD = B00000100;
      PORTB = B000100;
      // displayed number
      display.showNumberDec(9); // Expect: ___9
      break;

    case 10:
      //PLL OUTPUTS
      PORTD = B00001000;
      PORTB = B000100;
      // displayed number
      display.showNumberDec(10); // Expect: ___10
      break;

  }

}