MCP23008 I2C JoyPad TEST

joypadtest.ino

#include <Wire.h>
#include "Adafruit_MCP23008.h"

// https://github.com/adafruit/Adafruit-MCP23008-library

Adafruit_MCP23008 mcp;

void setup() {
  Serial.begin(9600);
  mcp.begin(7); // I2C address ***7
  mcp.pinMode(0,INPUT); mcp.pullUp(0,HIGH);
  mcp.pinMode(1,INPUT); mcp.pullUp(1,HIGH);
  mcp.pinMode(2,INPUT); mcp.pullUp(2,HIGH);
  mcp.pinMode(3,INPUT); mcp.pullUp(3,HIGH);
  mcp.pinMode(4,INPUT); mcp.pullUp(4,HIGH);
  mcp.pinMode(5,INPUT); mcp.pullUp(5,HIGH);

  mcp.pinMode(6,INPUT); mcp.pullUp(6,HIGH);
  mcp.pinMode(7,INPUT); mcp.pullUp(7,HIGH); 

  pinMode(13,OUTPUT); // onboard LED

  while(!Serial); // wait for Serial ready (Leonardo)
}

int U,L,D,R,A,B;
int T=0;

void loop() {
  digitalWrite(13,T); T=T?0:1;
  U=mcp.digitalRead(0);
  L=mcp.digitalRead(1);
  D=mcp.digitalRead(2);
  R=mcp.digitalRead(3);
  A=mcp.digitalRead(4);
  B=mcp.digitalRead(5);

  if (!U) Serial.print("U");
  if (!L) Serial.print("L");
  if (!D) Serial.print("D");
  if (!R) Serial.print("R");
  if (!A) Serial.print("A");
  if (!B) Serial.print("B");

  Serial.print(" ");
  
  delay(300);
}