使用Arduino mega 2560读取PS2无线手柄信号并控制小车运动

要使用Arduino Mega 2560读取PS2无线手柄信号并控制小车运动，首先需要连接PS2无线手柄接收器到Arduino，并使用PS2X库来简化手柄信号的读取。然后，将小车的电机连接到Arduino的数字引脚上，通过控制电机的旋转方向和速度来控制小车的运动。

以下是一个示例代码，通过读取PS2无线手柄的左摇杆来控制小车的前进和后退，通过右摇杆来控制小车的转向：

#include <PS2X_lib.h>

#define PS2_DAT 53
#define PS2_CMD 51
#define PS2_SEL 49
#define PS2_CLK 47

#define MOTOR_A_EN 9
#define MOTOR_A_IN1 6
#define MOTOR_A_IN2 7
#define MOTOR_B_EN 10
#define MOTOR_B_IN1 4
#define MOTOR_B_IN2 5

PS2X ps2x;

void setup() {
pinMode(MOTOR_A_EN, OUTPUT);
pinMode(MOTOR_A_IN1, OUTPUT);
pinMode(MOTOR_A_IN2, OUTPUT);
pinMode(MOTOR_B_EN, OUTPUT);
pinMode(MOTOR_B_IN1, OUTPUT);
pinMode(MOTOR_B_IN2, OUTPUT);

ps2x.config_gamepad(PS2_CLK, PS2_CMD, PS2_SEL, PS2_DAT, true, true);

Serial.begin(9600);
}

void loop() {
ps2x.read_gamepad();

int leftStickY = ps2x.Analog(PSS_LY);
int rightStickX = ps2x.Analog(PSS_RX);

// 控制左电机
if (leftStickY < 127) {
digitalWrite(MOTOR_A_IN1, HIGH);
digitalWrite(MOTOR_A_IN2, LOW);
analogWrite(MOTOR_A_EN, map(leftStickY, 0, 127, 0, 255));
} else if (leftStickY > 127) {
digitalWrite(MOTOR_A_IN1, LOW);
digitalWrite(MOTOR_A_IN2, HIGH);
analogWrite(MOTOR_A_EN, map(leftStickY, 128, 255, 0, 255));
} else {
digitalWrite(MOTOR_A_IN1, LOW);
digitalWrite(MOTOR_A_IN2, LOW);
analogWrite(MOTOR_A_EN, 0);
}

// 控制右电机
if (rightStickX < 127) {
digitalWrite(MOTOR_B_IN1, HIGH);
digitalWrite(MOTOR_B_IN2, LOW);
analogWrite(MOTOR_B_EN, map(rightStickX, 0, 127, 0, 255));
} else if (rightStickX > 127) {
digitalWrite(MOTOR_B_IN1, LOW);
digitalWrite(MOTOR_B_IN2, HIGH);
analogWrite(MOTOR_B_EN, map(rightStickX, 128, 255, 0, 255));
} else {
digitalWrite(MOTOR_B_IN1, LOW);
digitalWrite(MOTOR_B_IN2, LOW);
analogWrite(MOTOR_B_EN, 0);
}
}
请注意，以上代码仅为示例，实际使用时需要根据你的电机连接和手柄信号适配进行修改。