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

Dependencies:   BufferedSerial

Dependents:   rosserial_mbed_hello_world_publisher_kinetic s-rov-firmware ROS_HCSR04 DISCO-F469NI_LCDTS_demo ... more

ROSSerial_mbed for Kinetic 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_kinetic

rosserial_mbed Hello World example for Kinetic Kame distribution

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();
    }
}
Committer:
garyservin
Date:
Sat Dec 31 00:59:58 2016 +0000
Revision:
1:a849bf78d77f
Parent:
0:9e9b7db60fd5
Add missing round() method

Who changed what in which revision?

UserRevisionLine numberNew contents of line
garyservin 0:9e9b7db60fd5 1 #ifndef _ROS_actionlib_tutorials_FibonacciActionFeedback_h
garyservin 0:9e9b7db60fd5 2 #define _ROS_actionlib_tutorials_FibonacciActionFeedback_h
garyservin 0:9e9b7db60fd5 3
garyservin 0:9e9b7db60fd5 4 #include <stdint.h>
garyservin 0:9e9b7db60fd5 5 #include <string.h>
garyservin 0:9e9b7db60fd5 6 #include <stdlib.h>
garyservin 0:9e9b7db60fd5 7 #include "ros/msg.h"
garyservin 0:9e9b7db60fd5 8 #include "std_msgs/Header.h"
garyservin 0:9e9b7db60fd5 9 #include "actionlib_msgs/GoalStatus.h"
garyservin 0:9e9b7db60fd5 10 #include "actionlib_tutorials/FibonacciFeedback.h"
garyservin 0:9e9b7db60fd5 11
garyservin 0:9e9b7db60fd5 12 namespace actionlib_tutorials
garyservin 0:9e9b7db60fd5 13 {
garyservin 0:9e9b7db60fd5 14
garyservin 0:9e9b7db60fd5 15 class FibonacciActionFeedback : public ros::Msg
garyservin 0:9e9b7db60fd5 16 {
garyservin 0:9e9b7db60fd5 17 public:
garyservin 0:9e9b7db60fd5 18 typedef std_msgs::Header _header_type;
garyservin 0:9e9b7db60fd5 19 _header_type header;
garyservin 0:9e9b7db60fd5 20 typedef actionlib_msgs::GoalStatus _status_type;
garyservin 0:9e9b7db60fd5 21 _status_type status;
garyservin 0:9e9b7db60fd5 22 typedef actionlib_tutorials::FibonacciFeedback _feedback_type;
garyservin 0:9e9b7db60fd5 23 _feedback_type feedback;
garyservin 0:9e9b7db60fd5 24
garyservin 0:9e9b7db60fd5 25 FibonacciActionFeedback():
garyservin 0:9e9b7db60fd5 26 header(),
garyservin 0:9e9b7db60fd5 27 status(),
garyservin 0:9e9b7db60fd5 28 feedback()
garyservin 0:9e9b7db60fd5 29 {
garyservin 0:9e9b7db60fd5 30 }
garyservin 0:9e9b7db60fd5 31
garyservin 0:9e9b7db60fd5 32 virtual int serialize(unsigned char *outbuffer) const
garyservin 0:9e9b7db60fd5 33 {
garyservin 0:9e9b7db60fd5 34 int offset = 0;
garyservin 0:9e9b7db60fd5 35 offset += this->header.serialize(outbuffer + offset);
garyservin 0:9e9b7db60fd5 36 offset += this->status.serialize(outbuffer + offset);
garyservin 0:9e9b7db60fd5 37 offset += this->feedback.serialize(outbuffer + offset);
garyservin 0:9e9b7db60fd5 38 return offset;
garyservin 0:9e9b7db60fd5 39 }
garyservin 0:9e9b7db60fd5 40
garyservin 0:9e9b7db60fd5 41 virtual int deserialize(unsigned char *inbuffer)
garyservin 0:9e9b7db60fd5 42 {
garyservin 0:9e9b7db60fd5 43 int offset = 0;
garyservin 0:9e9b7db60fd5 44 offset += this->header.deserialize(inbuffer + offset);
garyservin 0:9e9b7db60fd5 45 offset += this->status.deserialize(inbuffer + offset);
garyservin 0:9e9b7db60fd5 46 offset += this->feedback.deserialize(inbuffer + offset);
garyservin 0:9e9b7db60fd5 47 return offset;
garyservin 0:9e9b7db60fd5 48 }
garyservin 0:9e9b7db60fd5 49
garyservin 0:9e9b7db60fd5 50 const char * getType(){ return "actionlib_tutorials/FibonacciActionFeedback"; };
garyservin 0:9e9b7db60fd5 51 const char * getMD5(){ return "73b8497a9f629a31c0020900e4148f07"; };
garyservin 0:9e9b7db60fd5 52
garyservin 0:9e9b7db60fd5 53 };
garyservin 0:9e9b7db60fd5 54
garyservin 0:9e9b7db60fd5 55 }
garyservin 0:9e9b7db60fd5 56 #endif