Gary Servin / ros_lib_melodic

ROS Serial library for Mbed platforms for ROS Melodic Morenia. Check http://wiki.ros.org/rosserial_mbed/ for more information.

Dependencies:   BufferedSerial

Dependents:   rosserial_mbed_hello_world_publisher_melodic Motortest Nucleo_vr_servo_project NucleoFM ... more

ROSSerial_mbed for Melodic Distribution

The Robot Operating System (ROS) is a flexible framework for writing robot software. It is a collection of tools, libraries, and conventions that aim to simplify the task of creating complex and robust robot behavior across a wide variety of robotic platforms.

The rosserial_mbed package allows to write ROS nodes on any mbed enabled devices and have them connected to a running ROS system on your computer using the serial port.

Hello World (example publisher)

Import programrosserial_mbed_hello_world_publisher_melodic

rosserial_mbed Hello World example for Melodic Morenia distribution

Last commit 08 Nov 2019 by Gary Servin

Running the Code

Now, launch the roscore in a new terminal window:

Quote:

$ roscore

Next, run the rosserial client application that forwards your MBED messages to the rest of ROS. Make sure to use the correct serial port:

Quote:

$ rosrun rosserial_python serial_node.py /dev/ttyACM0

Finally, watch the greetings come in from your MBED by launching a new terminal window and entering :

Quote:

$ rostopic echo chatter

See Also

More examples

Blink

/*
 * rosserial Subscriber Example
 * Blinks an LED on callback
 */
#include "mbed.h"
#include <ros.h>
#include <std_msgs/Empty.h>

ros::NodeHandle nh;
DigitalOut myled(LED1);

void messageCb(const std_msgs::Empty& toggle_msg){
    myled = !myled;   // blink the led
}

ros::Subscriber<std_msgs::Empty> sub("toggle_led", &messageCb);

int main() {
    nh.initNode();
    nh.subscribe(sub);

    while (1) {
        nh.spinOnce();
        wait_ms(1);
    }
}

Push

/*
 * Button Example for Rosserial
 */

#include "mbed.h"
#include <ros.h>
#include <std_msgs/Bool.h>

PinName button = p20;

ros::NodeHandle nh;

std_msgs::Bool pushed_msg;
ros::Publisher pub_button("pushed", &pushed_msg);

DigitalIn button_pin(button);
DigitalOut led_pin(LED1);

bool last_reading;
long last_debounce_time=0;
long debounce_delay=50;
bool published = true;

Timer t;
int main() {
    t.start();
    nh.initNode();
    nh.advertise(pub_button);

    //Enable the pullup resistor on the button
    button_pin.mode(PullUp);

    //The button is a normally button
    last_reading = ! button_pin;

    while (1) {
        bool reading = ! button_pin;

        if (last_reading!= reading) {
            last_debounce_time = t.read_ms();
            published = false;
        }

        //if the button value has not changed for the debounce delay, we know its stable
        if ( !published && (t.read_ms() - last_debounce_time)  > debounce_delay) {
            led_pin = reading;
            pushed_msg.data = reading;
            pub_button.publish(&pushed_msg);
            published = true;
        }

        last_reading = reading;

        nh.spinOnce();
    }
}

geometry_msgs/Inertia.h

Committer:
Gary Servin
Date:
2019-11-08
Revision:
1:da82487f547e
Parent:
0:04ac6be8229a

File content as of revision 1:da82487f547e:

#ifndef _ROS_geometry_msgs_Inertia_h
#define _ROS_geometry_msgs_Inertia_h

#include <stdint.h>
#include <string.h>
#include <stdlib.h>
#include "ros/msg.h"
#include "geometry_msgs/Vector3.h"

namespace geometry_msgs
{

  class Inertia : public ros::Msg
  {
    public:
      typedef double _m_type;
      _m_type m;
      typedef geometry_msgs::Vector3 _com_type;
      _com_type com;
      typedef double _ixx_type;
      _ixx_type ixx;
      typedef double _ixy_type;
      _ixy_type ixy;
      typedef double _ixz_type;
      _ixz_type ixz;
      typedef double _iyy_type;
      _iyy_type iyy;
      typedef double _iyz_type;
      _iyz_type iyz;
      typedef double _izz_type;
      _izz_type izz;

    Inertia():
      m(0),
      com(),
      ixx(0),
      ixy(0),
      ixz(0),
      iyy(0),
      iyz(0),
      izz(0)
    {
    }

    virtual int serialize(unsigned char *outbuffer) const
    {
      int offset = 0;
      union {
        double real;
        uint64_t base;
      } u_m;
      u_m.real = this->m;
      *(outbuffer + offset + 0) = (u_m.base >> (8 * 0)) & 0xFF;
      *(outbuffer + offset + 1) = (u_m.base >> (8 * 1)) & 0xFF;
      *(outbuffer + offset + 2) = (u_m.base >> (8 * 2)) & 0xFF;
      *(outbuffer + offset + 3) = (u_m.base >> (8 * 3)) & 0xFF;
      *(outbuffer + offset + 4) = (u_m.base >> (8 * 4)) & 0xFF;
      *(outbuffer + offset + 5) = (u_m.base >> (8 * 5)) & 0xFF;
      *(outbuffer + offset + 6) = (u_m.base >> (8 * 6)) & 0xFF;
      *(outbuffer + offset + 7) = (u_m.base >> (8 * 7)) & 0xFF;
      offset += sizeof(this->m);
      offset += this->com.serialize(outbuffer + offset);
      union {
        double real;
        uint64_t base;
      } u_ixx;
      u_ixx.real = this->ixx;
      *(outbuffer + offset + 0) = (u_ixx.base >> (8 * 0)) & 0xFF;
      *(outbuffer + offset + 1) = (u_ixx.base >> (8 * 1)) & 0xFF;
      *(outbuffer + offset + 2) = (u_ixx.base >> (8 * 2)) & 0xFF;
      *(outbuffer + offset + 3) = (u_ixx.base >> (8 * 3)) & 0xFF;
      *(outbuffer + offset + 4) = (u_ixx.base >> (8 * 4)) & 0xFF;
      *(outbuffer + offset + 5) = (u_ixx.base >> (8 * 5)) & 0xFF;
      *(outbuffer + offset + 6) = (u_ixx.base >> (8 * 6)) & 0xFF;
      *(outbuffer + offset + 7) = (u_ixx.base >> (8 * 7)) & 0xFF;
      offset += sizeof(this->ixx);
      union {
        double real;
        uint64_t base;
      } u_ixy;
      u_ixy.real = this->ixy;
      *(outbuffer + offset + 0) = (u_ixy.base >> (8 * 0)) & 0xFF;
      *(outbuffer + offset + 1) = (u_ixy.base >> (8 * 1)) & 0xFF;
      *(outbuffer + offset + 2) = (u_ixy.base >> (8 * 2)) & 0xFF;
      *(outbuffer + offset + 3) = (u_ixy.base >> (8 * 3)) & 0xFF;
      *(outbuffer + offset + 4) = (u_ixy.base >> (8 * 4)) & 0xFF;
      *(outbuffer + offset + 5) = (u_ixy.base >> (8 * 5)) & 0xFF;
      *(outbuffer + offset + 6) = (u_ixy.base >> (8 * 6)) & 0xFF;
      *(outbuffer + offset + 7) = (u_ixy.base >> (8 * 7)) & 0xFF;
      offset += sizeof(this->ixy);
      union {
        double real;
        uint64_t base;
      } u_ixz;
      u_ixz.real = this->ixz;
      *(outbuffer + offset + 0) = (u_ixz.base >> (8 * 0)) & 0xFF;
      *(outbuffer + offset + 1) = (u_ixz.base >> (8 * 1)) & 0xFF;
      *(outbuffer + offset + 2) = (u_ixz.base >> (8 * 2)) & 0xFF;
      *(outbuffer + offset + 3) = (u_ixz.base >> (8 * 3)) & 0xFF;
      *(outbuffer + offset + 4) = (u_ixz.base >> (8 * 4)) & 0xFF;
      *(outbuffer + offset + 5) = (u_ixz.base >> (8 * 5)) & 0xFF;
      *(outbuffer + offset + 6) = (u_ixz.base >> (8 * 6)) & 0xFF;
      *(outbuffer + offset + 7) = (u_ixz.base >> (8 * 7)) & 0xFF;
      offset += sizeof(this->ixz);
      union {
        double real;
        uint64_t base;
      } u_iyy;
      u_iyy.real = this->iyy;
      *(outbuffer + offset + 0) = (u_iyy.base >> (8 * 0)) & 0xFF;
      *(outbuffer + offset + 1) = (u_iyy.base >> (8 * 1)) & 0xFF;
      *(outbuffer + offset + 2) = (u_iyy.base >> (8 * 2)) & 0xFF;
      *(outbuffer + offset + 3) = (u_iyy.base >> (8 * 3)) & 0xFF;
      *(outbuffer + offset + 4) = (u_iyy.base >> (8 * 4)) & 0xFF;
      *(outbuffer + offset + 5) = (u_iyy.base >> (8 * 5)) & 0xFF;
      *(outbuffer + offset + 6) = (u_iyy.base >> (8 * 6)) & 0xFF;
      *(outbuffer + offset + 7) = (u_iyy.base >> (8 * 7)) & 0xFF;
      offset += sizeof(this->iyy);
      union {
        double real;
        uint64_t base;
      } u_iyz;
      u_iyz.real = this->iyz;
      *(outbuffer + offset + 0) = (u_iyz.base >> (8 * 0)) & 0xFF;
      *(outbuffer + offset + 1) = (u_iyz.base >> (8 * 1)) & 0xFF;
      *(outbuffer + offset + 2) = (u_iyz.base >> (8 * 2)) & 0xFF;
      *(outbuffer + offset + 3) = (u_iyz.base >> (8 * 3)) & 0xFF;
      *(outbuffer + offset + 4) = (u_iyz.base >> (8 * 4)) & 0xFF;
      *(outbuffer + offset + 5) = (u_iyz.base >> (8 * 5)) & 0xFF;
      *(outbuffer + offset + 6) = (u_iyz.base >> (8 * 6)) & 0xFF;
      *(outbuffer + offset + 7) = (u_iyz.base >> (8 * 7)) & 0xFF;
      offset += sizeof(this->iyz);
      union {
        double real;
        uint64_t base;
      } u_izz;
      u_izz.real = this->izz;
      *(outbuffer + offset + 0) = (u_izz.base >> (8 * 0)) & 0xFF;
      *(outbuffer + offset + 1) = (u_izz.base >> (8 * 1)) & 0xFF;
      *(outbuffer + offset + 2) = (u_izz.base >> (8 * 2)) & 0xFF;
      *(outbuffer + offset + 3) = (u_izz.base >> (8 * 3)) & 0xFF;
      *(outbuffer + offset + 4) = (u_izz.base >> (8 * 4)) & 0xFF;
      *(outbuffer + offset + 5) = (u_izz.base >> (8 * 5)) & 0xFF;
      *(outbuffer + offset + 6) = (u_izz.base >> (8 * 6)) & 0xFF;
      *(outbuffer + offset + 7) = (u_izz.base >> (8 * 7)) & 0xFF;
      offset += sizeof(this->izz);
      return offset;
    }

    virtual int deserialize(unsigned char *inbuffer)
    {
      int offset = 0;
      union {
        double real;
        uint64_t base;
      } u_m;
      u_m.base = 0;
      u_m.base |= ((uint64_t) (*(inbuffer + offset + 0))) << (8 * 0);
      u_m.base |= ((uint64_t) (*(inbuffer + offset + 1))) << (8 * 1);
      u_m.base |= ((uint64_t) (*(inbuffer + offset + 2))) << (8 * 2);
      u_m.base |= ((uint64_t) (*(inbuffer + offset + 3))) << (8 * 3);
      u_m.base |= ((uint64_t) (*(inbuffer + offset + 4))) << (8 * 4);
      u_m.base |= ((uint64_t) (*(inbuffer + offset + 5))) << (8 * 5);
      u_m.base |= ((uint64_t) (*(inbuffer + offset + 6))) << (8 * 6);
      u_m.base |= ((uint64_t) (*(inbuffer + offset + 7))) << (8 * 7);
      this->m = u_m.real;
      offset += sizeof(this->m);
      offset += this->com.deserialize(inbuffer + offset);
      union {
        double real;
        uint64_t base;
      } u_ixx;
      u_ixx.base = 0;
      u_ixx.base |= ((uint64_t) (*(inbuffer + offset + 0))) << (8 * 0);
      u_ixx.base |= ((uint64_t) (*(inbuffer + offset + 1))) << (8 * 1);
      u_ixx.base |= ((uint64_t) (*(inbuffer + offset + 2))) << (8 * 2);
      u_ixx.base |= ((uint64_t) (*(inbuffer + offset + 3))) << (8 * 3);
      u_ixx.base |= ((uint64_t) (*(inbuffer + offset + 4))) << (8 * 4);
      u_ixx.base |= ((uint64_t) (*(inbuffer + offset + 5))) << (8 * 5);
      u_ixx.base |= ((uint64_t) (*(inbuffer + offset + 6))) << (8 * 6);
      u_ixx.base |= ((uint64_t) (*(inbuffer + offset + 7))) << (8 * 7);
      this->ixx = u_ixx.real;
      offset += sizeof(this->ixx);
      union {
        double real;
        uint64_t base;
      } u_ixy;
      u_ixy.base = 0;
      u_ixy.base |= ((uint64_t) (*(inbuffer + offset + 0))) << (8 * 0);
      u_ixy.base |= ((uint64_t) (*(inbuffer + offset + 1))) << (8 * 1);
      u_ixy.base |= ((uint64_t) (*(inbuffer + offset + 2))) << (8 * 2);
      u_ixy.base |= ((uint64_t) (*(inbuffer + offset + 3))) << (8 * 3);
      u_ixy.base |= ((uint64_t) (*(inbuffer + offset + 4))) << (8 * 4);
      u_ixy.base |= ((uint64_t) (*(inbuffer + offset + 5))) << (8 * 5);
      u_ixy.base |= ((uint64_t) (*(inbuffer + offset + 6))) << (8 * 6);
      u_ixy.base |= ((uint64_t) (*(inbuffer + offset + 7))) << (8 * 7);
      this->ixy = u_ixy.real;
      offset += sizeof(this->ixy);
      union {
        double real;
        uint64_t base;
      } u_ixz;
      u_ixz.base = 0;
      u_ixz.base |= ((uint64_t) (*(inbuffer + offset + 0))) << (8 * 0);
      u_ixz.base |= ((uint64_t) (*(inbuffer + offset + 1))) << (8 * 1);
      u_ixz.base |= ((uint64_t) (*(inbuffer + offset + 2))) << (8 * 2);
      u_ixz.base |= ((uint64_t) (*(inbuffer + offset + 3))) << (8 * 3);
      u_ixz.base |= ((uint64_t) (*(inbuffer + offset + 4))) << (8 * 4);
      u_ixz.base |= ((uint64_t) (*(inbuffer + offset + 5))) << (8 * 5);
      u_ixz.base |= ((uint64_t) (*(inbuffer + offset + 6))) << (8 * 6);
      u_ixz.base |= ((uint64_t) (*(inbuffer + offset + 7))) << (8 * 7);
      this->ixz = u_ixz.real;
      offset += sizeof(this->ixz);
      union {
        double real;
        uint64_t base;
      } u_iyy;
      u_iyy.base = 0;
      u_iyy.base |= ((uint64_t) (*(inbuffer + offset + 0))) << (8 * 0);
      u_iyy.base |= ((uint64_t) (*(inbuffer + offset + 1))) << (8 * 1);
      u_iyy.base |= ((uint64_t) (*(inbuffer + offset + 2))) << (8 * 2);
      u_iyy.base |= ((uint64_t) (*(inbuffer + offset + 3))) << (8 * 3);
      u_iyy.base |= ((uint64_t) (*(inbuffer + offset + 4))) << (8 * 4);
      u_iyy.base |= ((uint64_t) (*(inbuffer + offset + 5))) << (8 * 5);
      u_iyy.base |= ((uint64_t) (*(inbuffer + offset + 6))) << (8 * 6);
      u_iyy.base |= ((uint64_t) (*(inbuffer + offset + 7))) << (8 * 7);
      this->iyy = u_iyy.real;
      offset += sizeof(this->iyy);
      union {
        double real;
        uint64_t base;
      } u_iyz;
      u_iyz.base = 0;
      u_iyz.base |= ((uint64_t) (*(inbuffer + offset + 0))) << (8 * 0);
      u_iyz.base |= ((uint64_t) (*(inbuffer + offset + 1))) << (8 * 1);
      u_iyz.base |= ((uint64_t) (*(inbuffer + offset + 2))) << (8 * 2);
      u_iyz.base |= ((uint64_t) (*(inbuffer + offset + 3))) << (8 * 3);
      u_iyz.base |= ((uint64_t) (*(inbuffer + offset + 4))) << (8 * 4);
      u_iyz.base |= ((uint64_t) (*(inbuffer + offset + 5))) << (8 * 5);
      u_iyz.base |= ((uint64_t) (*(inbuffer + offset + 6))) << (8 * 6);
      u_iyz.base |= ((uint64_t) (*(inbuffer + offset + 7))) << (8 * 7);
      this->iyz = u_iyz.real;
      offset += sizeof(this->iyz);
      union {
        double real;
        uint64_t base;
      } u_izz;
      u_izz.base = 0;
      u_izz.base |= ((uint64_t) (*(inbuffer + offset + 0))) << (8 * 0);
      u_izz.base |= ((uint64_t) (*(inbuffer + offset + 1))) << (8 * 1);
      u_izz.base |= ((uint64_t) (*(inbuffer + offset + 2))) << (8 * 2);
      u_izz.base |= ((uint64_t) (*(inbuffer + offset + 3))) << (8 * 3);
      u_izz.base |= ((uint64_t) (*(inbuffer + offset + 4))) << (8 * 4);
      u_izz.base |= ((uint64_t) (*(inbuffer + offset + 5))) << (8 * 5);
      u_izz.base |= ((uint64_t) (*(inbuffer + offset + 6))) << (8 * 6);
      u_izz.base |= ((uint64_t) (*(inbuffer + offset + 7))) << (8 * 7);
      this->izz = u_izz.real;
      offset += sizeof(this->izz);
     return offset;
    }

    const char * getType(){ return "geometry_msgs/Inertia"; };
    const char * getMD5(){ return "1d26e4bb6c83ff141c5cf0d883c2b0fe"; };

  };

}
#endif