arduino教学：红外遥控车

参考：

https://create.arduino.cc/projecthub/ryanchan/how-to-use-the-l298n-motor-driver-b124c5
https://howtomechatronics.com/tutorials/arduino/arduino-dc-motor-control-tutorial-l298n-pwm-h-bridge/

#include "IRremote.h"
#define IRRECV_1 0xFFA25D
#define IRRECV_2 0xFF629D
#define IRRECV_3 0xFFE21D
#define IRRECV_4 0xFF22DD
#define IRRECV_5 0xFF02FD
#define IRRECV_6 0xFFC23D
#define IRRECV_7 0xFFA25D
#define IRRECV_8 0xFFE01F
#define IRRECV_9 0xFF906F
#define IRRECV_0 0xFF9867
#define IRRECV_Hashtag 0xFFB04F    // #号
#define IRRECV_Asterisk 0xFF6897   //  *号
#define IRRECV_OK    0xFF38C7
#define IRRECV_UP    0xFF18E7
#define IRRECV_LEFT  0xFF10EF
#define IRRECV_RIGHT 0xFF5AA5
#define IRRECV_DOWN  0xFF4AB5#define BAUD 115200    //串口波特率
#define BOARDLEDPIN 13 //板载led接口#define L298ENA 9
#define L298ENB 10
#define L298IN1 7
#define L298IN2 8
#define L298IN3 5
#define L298IN4 6#define highSPEED 90
#define lowSPEED 70
#define RECV_PIN 11IRrecv irrecv(RECV_PIN);
decode_results IRResults;
unsigned int lastIRKey = 0;
bool running = false;void alertBlink(unsigned int t, unsigned long deltms);
void (*resetFunc)(void) = 0; //控制主控板自动重启
void setup()
{Serial.begin(BAUD);irrecv.enableIRIn();pinMode(BOARDLEDPIN,INPUT);// wait for Leonardo enumeration, others continue immediatelywhile (!Serial);motorStop();alertBlink(10, 500);
}void loop()
{if (irrecv.decode(&IRResults)){Serial.println(IRResults.value,HEX);switch (IRResults.value){case IRRECV_OK:lastIRKey = 20;running = !running;break;case IRRECV_LEFT:lastIRKey = 21;break;case IRRECV_UP:lastIRKey = 22;break;case IRRECV_RIGHT:lastIRKey = 23;break;case IRRECV_DOWN:lastIRKey = 24;break;default:break;}irrecv.resume();    // Receive the next value}Serial.println(String("lastIRKey is :")+lastIRKey);motorMotion(lastIRKey);
}/*** 功能：让板载led以一定的时间间隔闪烁* t：闪烁次数，当t=0时，不闪烁，一直亮。* deltms：闪烁间隔的毫秒数。*/
void alertBlink(unsigned int t, unsigned long deltms)
{if (t == 0){digitalWrite(BOARDLEDPIN, HIGH);}for (int i = 0; i < t; i++){digitalWrite(BOARDLEDPIN, HIGH);delay(deltms);digitalWrite(BOARDLEDPIN, LOW);delay(deltms);}
}
void motorMotion(unsigned int lastIRKey)
{switch (lastIRKey){case 20:if (running){motorForward();}else{motorStop();}break;case 21:if (running)motorTurnLeft();break;case 22:if (running)motorForward();break;case 23:if (running)motorTurnRight();break;case 24:if (running)motorBack();break;default:break;}
}
void motorForward()
{analogWrite(L298ENA, highSPEED);digitalWrite(L298IN1, HIGH);digitalWrite(L298IN2, LOW);analogWrite(L298ENB, highSPEED);digitalWrite(L298IN3, HIGH);digitalWrite(L298IN4, LOW);
}void motorBack()
{analogWrite(L298ENA, highSPEED);digitalWrite(L298IN1, LOW);digitalWrite(L298IN2, HIGH);analogWrite(L298ENB, highSPEED);digitalWrite(L298IN3, LOW);digitalWrite(L298IN4, HIGH);
}void motorTurnLeft()
{analogWrite(L298ENA, highSPEED);digitalWrite(L298IN1, HIGH);digitalWrite(L298IN2, LOW);analogWrite(L298ENB, lowSPEED);digitalWrite(L298IN3, HIGH);digitalWrite(L298IN4, LOW);}void motorTurnRight()
{analogWrite(L298ENA, lowSPEED);digitalWrite(L298IN1, HIGH);digitalWrite(L298IN2, LOW);analogWrite(L298ENB, highSPEED);digitalWrite(L298IN3, HIGH);digitalWrite(L298IN4, LOW);
}void motorStop()
{analogWrite(L298ENA, 0);analogWrite(L298ENB, 0);
}

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