POP-XT and JOY PSX Reading

// Code for Wireless Joystick kit
// http://goo.gl/6HNoEA
#include <popxt.h>
#include <PS2X_lib.h>
#define PS2_DAT 20
#define PS2_CMD 21
#define PS2_SEL 22
#define PS2_CLK 23

PS2X ps2x;

void setup(){
  delay(1000);
  glcdClear();
  glcdMode(1);
  setTextSize(2);
  glcd(0,0,"Connecting...");
  while(1){
    int error=ps2x.config_gamepad(PS2_CLK,PS2_CMD,PS2_SEL,PS2_DAT,false,false);
    if(error=0){
      glcd(0,0,"Connected!!!");
      delay(1000);
      glcdClear();
      break;
    }
    delay(500);
  }
}

void loop(){
  ps2x.read_gamepad(false,false);
  if(ps2x.Button(PSB_CIRCLE))
    glcd(1,1,"Circle ");
  else if(ps2x.Button(PSB_CROSS))
    glcd(1,1,"Cross ");
  else if(ps2x.Button(PSB_SQUARE))
    glcd(1,1,"Square ");
  else if(ps2x.Button(PSB_TRIANGLE))
    glcd(1,1,"Triangle ");
  else if(ps2x.Button(PSB_L1))
    glcd(1,1,"L1 ");
  else if(ps2x.Button(PSB_L2))
    glcd(1,1,"L2 ");
  else if(ps2x.Button(PSB_L3))
    glcd(1,1,"L3 ");
  else if(ps2x.Button(PSB_R1))
    glcd(1,1,"R1 ");
  else if(ps2x.Button(PSB_R2))
    glcd(1,1,"R2 ");
  else if(ps2x.Button(PSB_R3))
    glcd(1,1,"R3 ");
  else if(ps2x.Button(PSB_START))
    glcd(1,1,"Start ");
  else if(ps2x.Button(PSB_SELECT))
    glcd(1,1,"Select ");
  else if(ps2x.Button(PSB_PAD_UP))
    glcd(1,1,"Up ");
  else if(ps2x.Button(PSB_PAD_DOWN))
    glcd(1,1,"Down ");
  else if(ps2x.Button(PSB_PAD_LEFT))
    glcd(1,1,"Left ");
  else if(ps2x.Button(PSB_PAD_RIGHT))
    glcd(1,1,"Right ");
  else
    glcd(1,1," ");
  delay(50);
}