WirelessX RX Channel Programmer

#include <ATX2.h>

void setup()
{
  XIOinit();
  glcdClear();
  glcdMode(1);
  setTextSize(2);
  setTextColor(GLCD_ORANGE);
  glcd(2,0,"Disconnect   ");
  glcd(3,0,"Receiver     ");
  glcd(4,0,"from (3) TxD1");
  glcd(5,0,"and push (OK)");
}

void loop()
{
  int RF_Channel;
  while(1)
  {
    RF_Channel=knob(197);
    if (RF_Channel<5)
      RF_Channel=5;
    if (RF_Channel>197)
      RF_Channel=197;

    setTextSize(3);
    setTextColor(GLCD_DOLLAR);
    glcd(0,0,"RF:");
    setTextColor(GLCD_YELLOW);
    glcd(0,3,"%d  ",RF_Channel);
    setTextSize(1);
    setTextColor(GLCD_WHITE);
    glcd(3,10,"^-- Turn KNOB");
    delay(100);
    setTextSize(2);
    if (sw_OK())
    {
      pinMode(3,OUTPUT);
      digitalWrite(3,LOW);
      beep();
      setTextColor(GLCD_GREEN);
      glcd(2,0,"CONNECT...   ");
      glcd(3,0,"Receiver to 3");
      glcd(4,0,"and push (OK)");
      glcd(5,0,"within 3 sec.");
      while(!sw_OK());
      digitalWrite(3,HIGH);
      delay(200);
      Serial1.begin(9600);
      delay(2000);
      Serial1.write('C');
      Serial1.write('H');
      Serial1.write(RF_Channel);
      Serial1.flush();
      setTextColor(GLCD_PINK);
      glcd(2,0,"             ");
      glcd(3,0,"             ");
      glcd(4,0,"Programmed OK.");
      glcd(5,0,"             ");
      Serial1.end();
      delay(1000);
      setTextColor(GLCD_ORANGE);
      glcd(2,0,"Disconnect   ");
      glcd(3,0," Receiver    ");
      glcd(4,0,"from TxD1 pin");
      glcd(5,0,"and push (OK)");
    }
  }
}