Quad DC Motor Driver Shield for Arduino (แท้จาก DFRobot)

/*!
* @file QuadMotorDriverShield.ino
* @brief QuadMotorDriverShield.ino Motor control program
*
* Every 2 seconds to control motor positive inversion
*
* @author linfeng(490289303@qq.com)
* @version V1.0
* @date 2016-4-5
*/
const int E1 = 3; ///<Motor1 Speed
const int E2 = 11;///<Motor2 Speed
const int E3 = 5; ///<Motor3 Speed
const int E4 = 6; ///<Motor4 Speed

const int M1 = 4; ///<Motor1 Direction
const int M2 = 12;///<Motor2 Direction
const int M3 = 8; ///<Motor3 Direction
const int M4 = 7; ///<Motor4 Direction


void M1_advance(char Speed) ///<Motor1 Advance
{
digitalWrite(M1,LOW);
analogWrite(E1,Speed);
}
void M2_advance(char Speed) ///<Motor2 Advance
{
digitalWrite(M2,HIGH);
analogWrite(E2,Speed);
}
void M3_advance(char Speed) ///<Motor3 Advance
{
digitalWrite(M3,LOW);
analogWrite(E3,Speed);
}
void M4_advance(char Speed) ///<Motor4 Advance
{
digitalWrite(M4,HIGH);
analogWrite(E4,Speed);
}

void M1_back(char Speed) ///<Motor1 Back off
{
digitalWrite(M1,HIGH);
analogWrite(E1,Speed);
}
void M2_back(char Speed) ///<Motor2 Back off
{
digitalWrite(M2,LOW);
analogWrite(E2,Speed);
}
void M3_back(char Speed) ///<Motor3 Back off
{
digitalWrite(M3,HIGH);
analogWrite(E3,Speed);
}
void M4_back(char Speed) ///<Motor4 Back off
{
digitalWrite(M4,LOW);
analogWrite(E4,Speed);
}



void setup() {
for(int i=3;i<9;i++)
pinMode(i,OUTPUT);
for(int i=11;i<13;i++)
pinMode(i,OUTPUT);
}

void loop() {
M1_advance(100);
M2_advance(100);
M3_advance(100);
M4_advance(100);
delay(2000); ///<Delay 2S
M1_back(100);
M2_back(100);
M3_back(100);
M4_back(100);
delay(2000); ///<Delay 2S
}