Idea about how to detect controller unplugged

[Anonymous]

Dear Bill,

I’m starting to play with your library, and first thing I did was creating a loop to wait for controller to be plugged, keeping on calling “config_gamepad” until it returns with no errors – that was easy.

After that I was trying to detect when the user unplugs the controller, so that the previous loop could be entered again, but didn’t find a way. Finally, I’ve changed the “read_gamepad” function to return a boolean: based on the assumption that a plugged-in controller, following a 0x42 command, will properly answer with 0x5A in the third byte, I’ve put a “return PS2data[2]==0x5A;” statement just before the closing bracket.

Now, whenever I call “read_gamepad” I check the return value: false means controller unplugged. I’ve tested it with the only controller I own, so I’m unsure if this will always work or not: what do you think about it?

Bye,

Carlo

[Anonymous]

Could you post your code for that? I’ll try to give it a shot.

I don’t quite understand the 0x42 commands and what you are doing there, but then again I’m new and haven’t tried to figure it out. I have been learning this stuff mostly by reverse engineering other people’s code and figuring out what it does.

So, if you feel like sharing, I’ll play around a little bit and see if I can get it to work. I’d like something like this, because I have two dualshock II controllers, but one is in a little better shape than the other. However, the worst one always plugs in and is recognized, and the better one sometimes takes a few tries and cycling of the analog button. If this works, it would just make my life much easier!

 

[Bill]

Hadn’t considered the need to return if the controller is still responding. I’ll add this feature in the next release.

[Anonymous]

I use the ACK wire to detect when the controller has been disconnected/connected. I moved the configuration code from the setup method to a configure_ps2 method. The loop method calls the configure_ps2 method when the controller has been reconnected. The code could be moved to the read_gamepad method if you are ok with using the ACK wire.

#include <PS2X_lib.h> //for v1.6

PS2X ps2x; // create PS2 Controller Class

//set ACK_PIN to your ACK line to enable hot pluggable controllers.
//set ACK_PIN to 0 to disable it and then
//you must always either restart your Arduino after you conect the controller,
//or call config_gamepad(pins) again after connecting the controller.
int error = 0;
byte type = 0;
byte vibrate = 0;
byte disconnected = 1;

// data, command, clk, atn
// 13, 12, 11, 10
/* These are AVR PORTB pins, +8 to convert to Arduino pins */
#define CLK_PIN 12
#define CMD_PIN 11
#define ATT_PIN 13
#define DAT_PIN 10
#define ACK_PIN 9

void configure_ps2()
{
error = ps2x.config_gamepad(CLK_PIN,CMD_PIN,ATT_PIN,DAT_PIN, true, true); //setup pins and settings: GamePad(clock, command, attention, data, Pressures?, Rumble?) check for error

if(error == 0){
Serial.println(“Found Controller, configured successful”);
Serial.println(“Try out all the buttons, X will vibrate the controller, faster as you press harder;”);
Serial.println(“holding L1 or R1 will print out the analog stick values.”);
Serial.println(“Go to http://www.billporter.info for updates and to report bugs.”);
}

else if(error == 1)
{
Serial.println(“No controller found, check wiring, see readme.txt to enable debug. visit http://www.billporter.info for troubleshooting tips”);
}
else if(error == 2)
{
Serial.println(“Controller found but not accepting commands. see readme.txt to enable debug. Visit http://www.billporter.info for troubleshooting tips”);
}
else if(error == 3)
{
Serial.println(“Controller refusing to enter Pressures mode, may not support it. “);
}
//Serial.print(ps2x.Analog(1), HEX);

type = ps2x.readType();
switch(type) {
case 0:
Serial.println(“Unknown Controller type”);
break;
case 1:
Serial.println(“DualShock Controller Found”);
break;
case 2:
Serial.println(“GuitarHero Controller Found”);
break;
}
}

void setup(){
Serial.begin(57600);

//CHANGES for v1.6 HERE!!! **************PAY ATTENTION*************
if (ACK_PIN &gt 0)
{
pinMode(ACK_PIN, INPUT);
}
else
{
configure_ps2();
}
}

void loop(){
/* You must Read Gamepad to get new values
Read GamePad and set vibration values
ps2x.read_gamepad(small motor on/off, larger motor strenght from 0-255)
if you don’t enable the rumble, use ps2x.read_gamepad(); with no values

you should call this at least once a second
*/
if (ACK_PIN &gt 0)
{
boolean isConnected = digitalRead(ACK_PIN);
if (isConnected == 1)
{
if (disconnected == 0)
{
Serial.println(“Controller Not Connected”);
}
disconnected = 1;
delay(500);
return;
}
else if (disconnected == 1)
{
Serial.println(“Controller Connected”);
delay(500);
configure_ps2();
disconnected = 0;
}
}

if(error == 1) //skip loop if no controller found
return;

if(type == 2){ //Guitar Hero Controller

ps2x.read_gamepad(); //read controller

if(ps2x.ButtonPressed(GREEN_FRET))
Serial.println(“Green Fret Pressed”);
if(ps2x.ButtonPressed(RED_FRET))
Serial.println(“Red Fret Pressed”);
if(ps2x.ButtonPressed(YELLOW_FRET))
Serial.println(“Yellow Fret Pressed”);
if(ps2x.ButtonPressed(BLUE_FRET))
Serial.println(“Blue Fret Pressed”);
if(ps2x.ButtonPressed(ORANGE_FRET))
Serial.println(“Orange Fret Pressed”);

if(ps2x.ButtonPressed(STAR_POWER))
Serial.println(“Star Power Command”);

if(ps2x.Button(UP_STRUM)) //will be TRUE as long as button is pressed
Serial.println(“Up Strum”);
if(ps2x.Button(DOWN_STRUM))
Serial.println(“DOWN Strum”);

if(ps2x.Button(PSB_START)) //will be TRUE as long as button is pressed
Serial.println(“Start is being held”);
if(ps2x.Button(PSB_SELECT))
Serial.println(“Select is being held”);

if(ps2x.Button(ORANGE_FRET)) // print stick value IF TRUE
{
Serial.print(“Wammy Bar Position:”);
Serial.println(ps2x.Analog(WHAMMY_BAR), DEC);
}
}

else { //DualShock Controller

ps2x.read_gamepad(false, vibrate); //read controller and set large motor to spin at ‘vibrate’ speed

if(ps2x.Button(PSB_START)) //will be TRUE as long as button is pressed
Serial.println(“Start is being held”);
if(ps2x.Button(PSB_SELECT))
Serial.println(“Select is being held”);

if(ps2x.Button(PSB_PAD_UP)) { //will be TRUE as long as button is pressed
Serial.print(“Up held this hard: “);
Serial.println(ps2x.Analog(PSAB_PAD_UP), DEC);
}
if(ps2x.Button(PSB_PAD_RIGHT)){
Serial.print(“Right held this hard: “);
Serial.println(ps2x.Analog(PSAB_PAD_RIGHT), DEC);
}
if(ps2x.Button(PSB_PAD_LEFT)){
Serial.print(“LEFT held this hard: “);
Serial.println(ps2x.Analog(PSAB_PAD_LEFT), DEC);
}
if(ps2x.Button(PSB_PAD_DOWN)){
Serial.print(“DOWN held this hard: “);
Serial.println(ps2x.Analog(PSAB_PAD_DOWN), DEC);
}

vibrate = ps2x.Analog(PSAB_BLUE); //this will set the large motor vibrate speed based on
//how hard you press the blue (X) button

if (ps2x.NewButtonState()) //will be TRUE if any button changes state (on to off, or off to on)
{

if(ps2x.Button(PSB_L3))
Serial.println(“L3 pressed”);
if(ps2x.Button(PSB_R3))
Serial.println(“R3 pressed”);
if(ps2x.Button(PSB_L2))
Serial.println(“L2 pressed”);
if(ps2x.Button(PSB_R2))
Serial.println(“R2 pressed”);
if(ps2x.Button(PSB_GREEN))
Serial.println(“Triangle pressed”);

}

if(ps2x.ButtonPressed(PSB_RED)) //will be TRUE if button was JUST pressed
Serial.println(“Circle just pressed”);

if(ps2x.ButtonReleased(PSB_PINK)) //will be TRUE if button was JUST released
Serial.println(“Square just released”);

if(ps2x.NewButtonState(PSB_BLUE)) //will be TRUE if button was JUST pressed OR released
Serial.println(“X just changed”);

if(ps2x.Button(PSB_L1) || ps2x.Button(PSB_R1)) // print stick values if either is TRUE
{
Serial.print(“Stick Values:”);
Serial.print(ps2x.Analog(PSS_LY), DEC); //Left stick, Y axis. Other options: LX, RY, RX
Serial.print(“,”);
Serial.print(ps2x.Analog(PSS_LX), DEC);
Serial.print(“,”);
Serial.print(ps2x.Analog(PSS_RY), DEC);
Serial.print(“,”);
Serial.println(ps2x.Analog(PSS_RX), DEC);
}

}

delay(50);

}

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