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前言
本文利用PS2手柄和Arduino开发板制作了一个简易的遥控小车，利用蓝牙进行通信，可以实现前后左右的移动。（原理掌握之后可以自己拓展相关功能）
一、零件
1.Arduino UNO开发板：
ArduinoUNO是ArduinoUSB接口系列的最新版本，作为Arduino平台的参考标准模板。UNO的处理器核心是ATmega328，同时具有14路数字输入/输出口（其中6路可作为PWM输出），6路模拟输入，一个16MHz晶体振荡器，一个USB口，一个电源插座，一个ICSPheader和一个复位按钮。 
2.PS2手柄与接收器：
PS2 手柄由手柄与接收器两部分组成，手柄主要负责发送按键信息；接收器与单片机相连，用于接收手柄发来的信息，并传递给单片机，单片机也可通过接收器，向手柄发送命令，配置手柄的发送模式。  接收器的引脚功能如下图所示：  特别需要提醒的是：按下遥控器的 MODE 键，手柄可配置成“红灯模式”或者“绿灯模式”，当遥控器侧面的 “MODE LED”亮为红灯模式，反之为绿灯模式，“红灯模式”和“绿灯模式”的主要区别是摇杆模拟值得输出。
3.L298N驱动模块：
L298N，是一款接受高电压的电机驱动器，直流电机和步进电机都可以驱动。一片驱动芯片可同时控制两个直流减速电机做不同动作，在6V到46V的电压范围内，提供2安培的电流，并且具有过热自断和反馈检测功能。L298N可对电机进行直接控制，通过主控芯片的I/O输入对其控制电平进行设定，就可为电机进行正转反转驱动，操作简单、稳定性好，可以满足直流电机的大电流驱动条件。
4.面包板
面包板是由于板子上有很多小插孔，专为电子电路的无焊接实验设计制造的。由于各种电子元器件可根据需要随意插入或拔出，免去了焊接，节省了电路的组装时间，而且元件可以重复使用，所以非常适合电子电路的组装、调试和训练。
5.小车
由亚克力板、直流电机、小轮胎、电池盒、电池等搭建的小车。 
二、代码
#include //for v1.6
#define PS2_DAT 13 //14
#define PS2_CMD 11 //15
#define PS2_SEL 10 //16
#define PS2_CLK 12 //17
int input1 = 5; //PIN 5(PWM)
int input2 = 6; //PIN 6(PWM)
int input3 = 9; //PIN 9(PWM)
int input4 = 3; //PIN 3(PWM)
#define pressures true
#define rumble true
PS2X ps2x; // create PS2 Controller Class
int error = 0;
byte type = 0;
byte vibrate = 0;
// Reset func
void (* resetFunc) (void) = 0;
void setup(){
Serial.begin(9600);
delay(500); //added delay to give wireless ps2 module some time to startup, before configuring it
error = ps2x.config_gamepad(PS2_CLK, PS2_CMD, PS2_SEL, PS2_DAT, pressures, rumble);
if(error == 0){
Serial.print("Found Controller, configured successful ");
Serial.print("pressures = ");
if (pressures)
Serial.println("true ");
else
Serial.println("false");
Serial.print("rumble = ");
if (rumble)
Serial.println("true)");
else
Serial.println("false");
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("Note: Go to 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 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 www.billporter.info for troubleshooting tips");
else if(error == 3)
Serial.println("Controller refusing to enter Pressures mode, may not support it. ");
type = ps2x.readType();
switch(type) {
case 0:
Serial.println("Unknown Controller type found ");
break;
case 1:
Serial.println("DualShock Controller found ");
break;
case 2:
Serial.println("GuitarHero Controller found ");
break;
case 3:
Serial.println("Wireless Sony DualShock Controller found ");
break;
}
pinMode(input1,OUTPUT);
pinMode(input2,OUTPUT);
pinMode(input3,OUTPUT);
pinMode(input4,OUTPUT);
}
void STOP(){
digitalWrite(input1,LOW);
digitalWrite(input2,LOW);
digitalWrite(input3,LOW);
digitalWrite(input4,LOW);
}//停止函数
void RUN(){
digitalWrite(input1,HIGH);
digitalWrite(input2,LOW);
digitalWrite(input3,LOW);
digitalWrite(input4,HIGH);
analogWrite(input1,250);
analogWrite(input4,250);
}//可调速的前进函数
void LEFT(){
digitalWrite(input1,HIGH);
digitalWrite(input2,LOW);
digitalWrite(input3,HIGH);
digitalWrite(input4,LOW);
analogWrite(input1,200);
analogWrite(input3,200);
}//可调速的左转函数
void RIGHT(){
digitalWrite(input1,LOW);
digitalWrite(input2,HIGH);
digitalWrite(input3,LOW);
digitalWrite(input4,HIGH);
analogWrite(input2,200);
analogWrite(input4,200);
}//可调速的右转函数
void BACK(){
digitalWrite(input1,LOW);
digitalWrite(input2,HIGH);
digitalWrite(input3,HIGH);
digitalWrite(input4,LOW);
analogWrite(input2,250);
analogWrite(input3,250);
}//可调速的后退函数
void loop() {
if(error == 1){ //skip loop if no controller found
resetFunc();
}
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: ");
RUN();
Serial.println(ps2x.Analog(PSAB_PAD_UP), DEC);
}
if(ps2x.Button(PSB_PAD_RIGHT)){
Serial.print("Right held this hard: ");
LEFT();
Serial.println(ps2x.Analog(PSAB_PAD_RIGHT), DEC);
}
if(ps2x.Button(PSB_PAD_LEFT)){
Serial.print("LEFT held this hard: ");
RIGHT();
Serial.println(ps2x.Analog(PSAB_PAD_LEFT), DEC);
}
if(ps2x.Button(PSB_PAD_DOWN)){
Serial.print("DOWN held this hard: ");
BACK();
Serial.println(ps2x.Analog(PSAB_PAD_DOWN), DEC);
}
vibrate = ps2x.Analog(PSAB_CROSS); //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_TRIANGLE))
Serial.println("Triangle pressed");
STOP();
}
if(ps2x.ButtonPressed(PSB_CIRCLE)) //will be TRUE if button was JUST pressed
Serial.println("Circle just pressed");
if(ps2x.NewButtonState(PSB_CROSS)) //will be TRUE if button was JUST pressed OR released
Serial.println("X just changed");
if(ps2x.ButtonReleased(PSB_SQUARE)) //will be TRUE if button was JUST released
Serial.println("Square just released");
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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