We are currently using this capacitive trackpad with the Arduino to control a motorized wheelchair. We currently have the code working and are looking to interface with the motorcontroller. However, we are trying to use the two "mouse" buttons for other things such as stopping the wheelchair or activating another aspect of it. I know that since this is sold as a trackpad that both of those buttons are considered mouse buttons but how could we go about programming them to do something different?
Below we have the current code allowing us to control two servo motors with just the touchpad portion, what part of this would we need to modify to use the two mouse buttons as something else?
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#include <Adafruit_PS2_Trackpad.h>
/***************************************************
This is an example for the Adafruit Capacitive Trackpad
Designed specifically to work with the Adafruit Capacitive Trackpad
----> Capacitive Trackpad/Touchpad - Microcontroller-Friendly PS/2 : ID 837 : $27.50 : Adafruit Industries, Unique & fun DIY electronics and kits
These devices use PS/2 to communicate, 2 pins are required to
interface
Adafruit invests time and resources providing this open source code,
please support Adafruit and open-source hardware by purchasing
products from Adafruit!
Written by Limor Fried/Ladyada for Adafruit Industries.
BSD license, all text above must be included in any redistribution
****************************************************/
/*
We suggest using a PS/2 breakout adapter such as this
for easy wiring!
PS/2 pin #1 (Brown) - Data
PS/2 pin #2 (White) - N/C
PS/2 pin #3 (Black) - Ground
PS/2 pin #4 (Green) - 5V
PS/2 pin #5 (Yellow) - Clock
PS/2 pin #6 (Red) - N/C
*/
// PS2 uses two digital pins
#define PS2_DATA 2
#define PS2_CLK 3
//int FPin = 13;
//int RPin = 12;
//int BPin = 11;
//int LPin = 10;
//int FRPin = 9;
//int FLPin = 8;
//int BLPin = 7;
//int BRPin = 6;
//Adafruit_PS2 ps2(PS2_CLK, PS2_DATA);
// Use thid declaration when you want the trackpad to act like a 'mouse'
// with relative positioning
//Adafruit_PS2_Mouse ps2(PS2_CLK, PS2_DATA);
// Use this declaration when you want 'absolute' tablet mode
Adafruit_PS2_Trackpad ps2(PS2_CLK, PS2_DATA);
void setup() {
// pinMode(FPin, OUTPUT);
//pinMode(RPin, OUTPUT);
// pinMode(BPin, OUTPUT);
// pinMode(LPin, OUTPUT);
//pinMode(FRPin, OUTPUT);
//pinMode(BRPin, OUTPUT);
//pinMode(FLPin, OUTPUT);
//pinMode(BLPin, OUTPUT);
Serial.begin(9600);
delay(2000);
Serial.println("Hello");
delay(2000);
if (ps2.begin())
Serial.println("Successfully found PS2 mouse device");
else
Serial.println("Did not find PS2 mouse device");
Serial.print("PS/2 Mouse with ID 0x");
Serial.println(ps2.readID(), HEX);
}
//int ForwardBack_Pin = A3;
//int LeftRight_Pin = A2;
int Tx_pin = 5; // Sabertooth Input Pin NEED TO CHANGE
int Rx_pin = 6; // Sabertooth Input Pin NEED TO CHANGE
float ForwardBack_Input ;
float LeftRight_Input ;
int Forward_Limit = 80; // High Range of Touchpad
int Back_Limit = 730; // Low Range of Touchpad
int Right_Limit = 1010; // High limit of Touchpad RIGHT
int Left_Limit = 85; //Low limit of Touchpad LEFT
int ForwardBack_power = 0; // -127 for full reverse, 0 for stop, +127 for full forward.
int LeftRight_power = 0; // -127 for full CounterClockwise, 0 for stop, +127 for full Clockwise
void loop()
{
if (! ps2.readData()) return;
//Joystick values
ForwardBack_Input = ps2.y ;
LeftRight_Input = ps2.x ;
// Convert to Sabertooth Values
ForwardBack_power=map(ForwardBack_Input,Forward_Limit, Back_Limit, 127,-127); // Translate and scale joystick values to Sabertooth values
LeftRight_power=map(LeftRight_Input,Left_Limit, Right_Limit, 127,-127); // Translate and scale joystick values to Sabertooth values
// Command the Sabertooth to drive the motors.
// ST.drive(ForwardReverse_power); //Command the Sabertooth translational motion
//ST.turn(LeftRight_power); //Command the Sabertooth rotational motion
// Create debug information
Serial.print(ForwardBack_power);
Serial.print("\t");
Serial.println(LeftRight_power); //Debug
delay(25);
}