Can Bus with 5 Devices

[alfamanager]

Hello everyone. Im stuying about arduino Can Bus project but i have some problem with it.

First of all the project has 1 arduino mega and 4 pro mini(they have servo motors), all of them will communicate with can bus module. In this project Arduino mega send the order all of the pro minis and pro minis -if they have work to do- start their works. But they are not starting. Modules couldnt do their jobs.

Can you help me please thank you

Also when i start modules i get only Can Bus OK message i cant get the feedback

[sherzaad]

alfamanager:
Hello everyone. Im stuying about arduino Can Bus project but i have some problem with it.

First of all the project has 1 arduino mega and 4 pro mini(they have servo motors), all of them will communicate with can bus module. In this project Arduino mega send the order all of the pro minis and pro minis -if they have work to do- start their works. But they are not starting. Modules couldnt do their jobs.

Can you help me please thank you

Also when i start modules i get only Can Bus OK message i cant get the feedback

oh yes sure we can help... the problem is so obvious!

oh wait... sorry we can't help solving your problem without your code or a schematic our you CAN network... or should we try a crystal ball??

[alfamanager]

#include <Adafruit_NeoPixel.h>
#ifdef AVR
#include <avr/power.h>
#endif
#include <SPI.h> //SPI is used to talk to the CAN Controller
#include <mcp_can.h>

MCP_CAN CAN(10);

/// Motor 1
const byte M1CWPin = 8; // INA: Clockwise input
const byte M1CCWPin = 7; // INB: Counter-clockwise input
const byte M1PWMPin = 5; // PWM input
const byte M1CurrentSensePin = A2; // CS: Current sense ANALOG input
const byte M1EnablePin = A0; // EN: Status of switches output (Analog pin)
byte varlik;
byte level;
byte gecti;
byte val;
byte sayac = 0;
byte sayac1 = 0;

unsigned char stmp1[1];
unsigned char stmp2[3];

unsigned char len = 0;
unsigned char buf[1];
unsigned int canID;

int Led = 13 ;// define LED Interface
int Pin2 = 9;
int Pin3 = 15;
int Pin4 = 4;
int Pin5 = 3;

int Name ;

byte hitObject = false;

int Item = 4;

long previousMillis = 0; // will store last time LED was updated
long interval = 1000; // interval at which to blink (milliseconds)

#define PIN 6
Adafruit_NeoPixel pixels = Adafruit_NeoPixel(1, PIN, NEO_GRB + NEO_KHZ800);

void setup() {

Serial.begin(115200); // Initiates the serial to do the monitoring
Serial.println("module");
Serial.println(); //Print function list for user selection
stmp1 [0]= char (Item);
for (int i = 1 ; i <= 1; i++)
{
stmp1 = 0;

• }*

• stmp1 [1] |= (1 << 0);*

• stmp1 [1] |= (1 << 1);*

• stmp1 [1] |= (1 << 2);*

• stmp2 [2] |= (1 << 0);*

• stmp2 [2] |= (1 << 1);*

• stmp2 [2] |= (1 << 2);*
  START_INIT:

• if (CAN_OK == CAN.begin(CAN_250KBPS)) *

• {*

• Serial.println("CAN BUS Shield init ok!");*

• }*

• else*

• {*

• Serial.println("CAN BUS Shield init fail");*

• Serial.println("Init CAN BUS Shield again");*

• _delay_us(100);*

• goto START_INIT;*

• }*

• pixels.begin(); // This initializes the NeoPixel library.*

• pinMode (Led, OUTPUT) ;// define LED as output interface*

• pinMode (Pin2, INPUT) ;// define the obstacle avoidance sensor output interface*

• pinMode (Pin3, INPUT) ;// define the obstacle avoidance sensor output interface*

• pinMode (Pin4, INPUT) ;// define the obstacle avoidance sensor output interface*

• pinMode (Pin5, INPUT) ;// define the obstacle avoidance sensor output interface*

• pinMode (M1CWPin, OUTPUT);*

• pinMode (M1CCWPin, OUTPUT);*

• digitalWrite(M1CWPin, LOW);*

• digitalWrite(M1CCWPin, LOW);*

}
void loop ()
{

• if (CAN_MSGAVAIL == CAN.checkReceive()) //check if data coming*

• {*

• CAN.readMsgBuf(&len, buf); //read data, len: data length, buf: data buffer*

• canID = CAN.getCanId(); //getting the ID of the incoming message*

• if (canID == 0xA0) //reading only our beloved 0x01 message*

• {*

• Paksay = buf[0];*

• while ((sayac <= Item) && (digitalRead (Pin2) == LOW))*

• {*

• stmp2 [2] |= (1 << 0);*

• seviye = digitalRead (Pin3) ;*

• if (level== LOW)*

• {*

• green ();*

• Serial.println("OK! ");*

• stmp2 [1] |= (1 << 0);*

• }*

• else*

• {*

• blue ();*

• Serial.println ("Not OK!" ) ;*

• stmp2 [1] &= ~(1 << 0);*

• }*

• throw ();*

• }*

• for (int i = 0 ; i <= 7; i++)*

• {*

• int y = (buf [1] >> i ) & 1;*

• Serial.print(" ");*

• Serial.print(y);*

• }*

• Serial.println();*
  _ Serial.println("\n\t*************");_

• }*

• }*

• stop ();*

}
void throw () {

• const byte say = sayac;*

• motor ();*

• digitalWrite(Led, LOW);*

• // delay (300);*

• while ((say == sayac) && (digitalRead (UrunVarPin) == LOW))*

• {*

• int val = digitalRead(Pin4);*

• if ( (val == 0) && (hitObject == false))*

• {*

• hitObject = true;*

• sayac ++;*

• Serial.println(" ... ATTIM ");*

• digitalWrite(Led, HIGH);*

• gone();*

• stmp2 [3] |= (1 << 0);*

• }*

• else if ( (val == 1) && (hitObject == true))*

• {*

• hitObject = false;*

• stmp2 [1] &= ~(1 << 0);*

• }*

• }*

• if (digitalRead (Pin2) == HIGH)*

• {*

• stop ();*

• Serial.println("Out of item");*

• stmp2 [2] &= ~(1 << 0);*

• }*
  }
  void gone () {

• const byte say = sayac1;*

• while ((say == sayac1) && (digitalRead (UrunVarPin) == LOW ))*

• {*

• int val = digitalRead(Pin5);*

• if ( (val == 0) && (hitObject == false))*

• {*

• hitObject = true;*

• sayac1 ++;*

• Serial.println("Gone ");*

• digitalWrite(Led, HIGH);*

• stmp1 [1] |= (1 << 0);*

• }*

• else if ( (val == 1) && (hitObject == true))*

• {*

• delay (2000);*

• hitObject = false;*

• Serial.println ("stuck");*

• stop();*

• stmp1 [1] &= ~(1 << 0);*

• }*

• }*
  _ /* if (digitalRead (Pin5) == HIGH)_

• {*

• stop ();*

• Serial.println("stayed ");*
  _ }*/_

• if (hitObject == false)*

• {*

• Serial.println("stayed ");*

• dur ();*

• stmp1 [1] &= ~(1 << 0);*

• }*

• CAN.sendMsgBuf(0x10, 0, 2, stmp1,stmp2);*
  }
  void motor() {

• /////////////////////////////*

• // Motor 1 ClockWise*

• digitalWrite(M1CWPin, HIGH);*

• // Motor full speed*

• analogWrite(M1PWMPin, 255);*
  }
  void stop()
  {

• red ();*

• digitalWrite(M1CWPin, LOW);*
  }
  void red ()
  {

• pixels.setPixelColor(0, pixels.Color(10, 0, 0)); // Moderately bright red color.*

• pixels.show(); // This sends the updated pixel color to the hardware.*
  }
  void green ()
  {

• pixels.setPixelColor(0, pixels.Color(0, 10, 0)); // Moderately bright green color.*

• pixels.show(); // This sends the updated pixel color to the hardware.*
  }
  void blue ()
  {

• pixels.setPixelColor(0, pixels.Color(0, 0, 10)); // Moderately bright blue color.*

• pixels.show(); // This sends the updated pixel color to the hardware.*
  }
  this is reciever code. it also has to send data to mega

[noiasca]

first: please read the how to use this forum and learn how to post code. If you know how to post code - edit your post.

second: tell us: which canbus library you are using. post a LINK (clickable!) to your library

third: tell us: have you successfully tried the can_send and can_receive example - which are coming with most of the libraries, and were these examples sucessfull with your hardware?

[alfamanager]

I've got library from github (the guy i totally cant remember his name).

Now can you help me for this situation?