BPI-Nano robot board

Overview

arduino Nano robot board

　BPI-Nano arduino Nano

　BPI-Nano arduino Nano

　with BPI-NANO arduino NANO board

This robot board is design for Arduino Nano and Nano compatible boards. It is designed by Harsh Dethe and made by BPI factory.

BPI-Nano robot boards motor drive expansion plate available in the bpi-nano controller supports dual-circuit motor control, with single maximum current up to 1A.

Arduino standard pin design interface, also can be used with Arduino Nano.It can be applied to the development of small mobile robot.

Hardware

Technical specifications

• Driver chip: L293B
• Logical working voltage: 5V DC
• Motor drive voltage: 7-12v DC
• Maximum driving current: 1A (per circuit)
• Pin for motor drive: pin4/5/6/7 (Arduino controller)
• Size: 56x57mm

Hardware interface

PIN define

BPI-Nano aruino Nano robort GPIO pin define
Pin	Function
Digital 2、4	Motor2 Steering control, 2 high level, 4 low level positive turn;Whereas inversion
Digital 3	Motor 2 Enable interface, high level enable
Digital 5	Motor 1 Enable interface, high level enable
Digital 7、8	Motor 1 Steering control, 7 high level, 8 low level positive turn;Whereas inversion

Software

Sample code

//This motor shield use Pin 2,3,4,5,6,7,8 to control the motor
// Just plug the nano into the shield
// Simply connect your motors to M1 ,M2
// Upload the code to BPI-NANO/arduino
// Through serial monitor, type 'a','s', 'w','d','x' to control the motor
// http://www.banana-pi.org/
//  http://www.banana-pi.org/
// Last modified on 20/09/2019
int EN1 = 5;  //Motor 1 Enable
int EN2 = 3;  //Motor 2 Enable
int IN1 = 7;
int IN2 = 8; //Motor 1 
int IN3 = 2;
int IN4 = 4; //Motor 2

void Motor1(int ENA, boolean reverse)
       {
         digitalWrite(ENA,HIGH);
        if(reverse)
        { 
         digitalWrite(IN1,HIGH);   
         digitalWrite(IN2,LOW);    
        }
       else
       {
         digitalWrite(IN1,LOW);  
         digitalWrite(IN1,HIGH);    
        }
       }  
       
void Motor2(int ENB, boolean reverse)
       {
         digitalWrite(ENB,HIGH);
        if(reverse)
        { 
         digitalWrite(IN3,HIGH);   
         digitalWrite(IN4,LOW);  
        }
       else
       {
         digitalWrite(IN3,LOW);   
         digitalWrite(IN4,HIGH);   
        }
       }  
      
void setup() 
{ 
   int i;

   for(i=2;i<=8;i++)  //For BPI-NANO Motor Shield
   pinMode(i, OUTPUT);  //set pin 2,3,4,5,6,78 to output mode

   Serial.begin(9600);   
} 

void loop() 
{ 
 int x,delay_en;
 char val;
 while(1)
 {
   val = Serial.read();
   if(val!=-1)
      {
         switch(val)
          {
            case 'w'://Move ahead
                       Motor1(100,true);  
                       Motor2(100,true);                  
                        break;
            case 's'://move back
                       Motor1(100,false);
                       Motor2(100,false);
                        break;
            case 'a'://turn left
                       Motor1(100,true);
                       Motor2(100,false);
                        break;       
            case 'd'://turn right
                       Motor1(100,false);
                       Motor2(100,true);
                       break;   
              case 'x'://stop
                       digitalWrite(ENA,LOW);
                       digitalWrite(ENB,LOW);
                        break;                                  
          }             
      }
  }                           
}