use a Joystick in CCPotentiometer mode，when ccvalue not change,hold the last ccvalue

[fareign]

for example I use a Joystick ，when ccvalue not changed in 500ms ,lock ccvalue at this memont.

 if (z >=0 ) {
    zzvalue = 117;
    zmap = map(abs(z),80,512,65,127);
 }else{
    zzvalue = 117;
    zmap = map(abs(z),80,512,65,0);
 }

if(zmap != cz && abs(z) >= 80 ) {
startime = stoptime = millis();

}else{
    stoptime = millis();

}
long holdtime = stoptime - startime;


  if (abs(z) >= 80 && holdtime < 500 ) {
      Control_Surface.sendCC({zzvalue, channel}, zmap);
  } else{
      delay(300);
 }
  cz= zmap;

I use holdtime ,when I release Joystick, holdtime can hold. but it still send centervalue