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 00:48:34 2016 +0000
Revision:
0:9e9b7db60fd5
Initial commit, generated based on a clean kinetic-desktop-full

Who changed what in which revision?

UserRevisionLine numberNew contents of line
garyservin 0:9e9b7db60fd5 1 #ifndef _ROS_gazebo_msgs_WorldState_h
garyservin 0:9e9b7db60fd5 2 #define _ROS_gazebo_msgs_WorldState_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 "geometry_msgs/Pose.h"
garyservin 0:9e9b7db60fd5 10 #include "geometry_msgs/Twist.h"
garyservin 0:9e9b7db60fd5 11 #include "geometry_msgs/Wrench.h"
garyservin 0:9e9b7db60fd5 12
garyservin 0:9e9b7db60fd5 13 namespace gazebo_msgs
garyservin 0:9e9b7db60fd5 14 {
garyservin 0:9e9b7db60fd5 15
garyservin 0:9e9b7db60fd5 16 class WorldState : public ros::Msg
garyservin 0:9e9b7db60fd5 17 {
garyservin 0:9e9b7db60fd5 18 public:
garyservin 0:9e9b7db60fd5 19 typedef std_msgs::Header _header_type;
garyservin 0:9e9b7db60fd5 20 _header_type header;
garyservin 0:9e9b7db60fd5 21 uint32_t name_length;
garyservin 0:9e9b7db60fd5 22 typedef char* _name_type;
garyservin 0:9e9b7db60fd5 23 _name_type st_name;
garyservin 0:9e9b7db60fd5 24 _name_type * name;
garyservin 0:9e9b7db60fd5 25 uint32_t pose_length;
garyservin 0:9e9b7db60fd5 26 typedef geometry_msgs::Pose _pose_type;
garyservin 0:9e9b7db60fd5 27 _pose_type st_pose;
garyservin 0:9e9b7db60fd5 28 _pose_type * pose;
garyservin 0:9e9b7db60fd5 29 uint32_t twist_length;
garyservin 0:9e9b7db60fd5 30 typedef geometry_msgs::Twist _twist_type;
garyservin 0:9e9b7db60fd5 31 _twist_type st_twist;
garyservin 0:9e9b7db60fd5 32 _twist_type * twist;
garyservin 0:9e9b7db60fd5 33 uint32_t wrench_length;
garyservin 0:9e9b7db60fd5 34 typedef geometry_msgs::Wrench _wrench_type;
garyservin 0:9e9b7db60fd5 35 _wrench_type st_wrench;
garyservin 0:9e9b7db60fd5 36 _wrench_type * wrench;
garyservin 0:9e9b7db60fd5 37
garyservin 0:9e9b7db60fd5 38 WorldState():
garyservin 0:9e9b7db60fd5 39 header(),
garyservin 0:9e9b7db60fd5 40 name_length(0), name(NULL),
garyservin 0:9e9b7db60fd5 41 pose_length(0), pose(NULL),
garyservin 0:9e9b7db60fd5 42 twist_length(0), twist(NULL),
garyservin 0:9e9b7db60fd5 43 wrench_length(0), wrench(NULL)
garyservin 0:9e9b7db60fd5 44 {
garyservin 0:9e9b7db60fd5 45 }
garyservin 0:9e9b7db60fd5 46
garyservin 0:9e9b7db60fd5 47 virtual int serialize(unsigned char *outbuffer) const
garyservin 0:9e9b7db60fd5 48 {
garyservin 0:9e9b7db60fd5 49 int offset = 0;
garyservin 0:9e9b7db60fd5 50 offset += this->header.serialize(outbuffer + offset);
garyservin 0:9e9b7db60fd5 51 *(outbuffer + offset + 0) = (this->name_length >> (8 * 0)) & 0xFF;
garyservin 0:9e9b7db60fd5 52 *(outbuffer + offset + 1) = (this->name_length >> (8 * 1)) & 0xFF;
garyservin 0:9e9b7db60fd5 53 *(outbuffer + offset + 2) = (this->name_length >> (8 * 2)) & 0xFF;
garyservin 0:9e9b7db60fd5 54 *(outbuffer + offset + 3) = (this->name_length >> (8 * 3)) & 0xFF;
garyservin 0:9e9b7db60fd5 55 offset += sizeof(this->name_length);
garyservin 0:9e9b7db60fd5 56 for( uint32_t i = 0; i < name_length; i++){
garyservin 0:9e9b7db60fd5 57 uint32_t length_namei = strlen(this->name[i]);
garyservin 0:9e9b7db60fd5 58 varToArr(outbuffer + offset, length_namei);
garyservin 0:9e9b7db60fd5 59 offset += 4;
garyservin 0:9e9b7db60fd5 60 memcpy(outbuffer + offset, this->name[i], length_namei);
garyservin 0:9e9b7db60fd5 61 offset += length_namei;
garyservin 0:9e9b7db60fd5 62 }
garyservin 0:9e9b7db60fd5 63 *(outbuffer + offset + 0) = (this->pose_length >> (8 * 0)) & 0xFF;
garyservin 0:9e9b7db60fd5 64 *(outbuffer + offset + 1) = (this->pose_length >> (8 * 1)) & 0xFF;
garyservin 0:9e9b7db60fd5 65 *(outbuffer + offset + 2) = (this->pose_length >> (8 * 2)) & 0xFF;
garyservin 0:9e9b7db60fd5 66 *(outbuffer + offset + 3) = (this->pose_length >> (8 * 3)) & 0xFF;
garyservin 0:9e9b7db60fd5 67 offset += sizeof(this->pose_length);
garyservin 0:9e9b7db60fd5 68 for( uint32_t i = 0; i < pose_length; i++){
garyservin 0:9e9b7db60fd5 69 offset += this->pose[i].serialize(outbuffer + offset);
garyservin 0:9e9b7db60fd5 70 }
garyservin 0:9e9b7db60fd5 71 *(outbuffer + offset + 0) = (this->twist_length >> (8 * 0)) & 0xFF;
garyservin 0:9e9b7db60fd5 72 *(outbuffer + offset + 1) = (this->twist_length >> (8 * 1)) & 0xFF;
garyservin 0:9e9b7db60fd5 73 *(outbuffer + offset + 2) = (this->twist_length >> (8 * 2)) & 0xFF;
garyservin 0:9e9b7db60fd5 74 *(outbuffer + offset + 3) = (this->twist_length >> (8 * 3)) & 0xFF;
garyservin 0:9e9b7db60fd5 75 offset += sizeof(this->twist_length);
garyservin 0:9e9b7db60fd5 76 for( uint32_t i = 0; i < twist_length; i++){
garyservin 0:9e9b7db60fd5 77 offset += this->twist[i].serialize(outbuffer + offset);
garyservin 0:9e9b7db60fd5 78 }
garyservin 0:9e9b7db60fd5 79 *(outbuffer + offset + 0) = (this->wrench_length >> (8 * 0)) & 0xFF;
garyservin 0:9e9b7db60fd5 80 *(outbuffer + offset + 1) = (this->wrench_length >> (8 * 1)) & 0xFF;
garyservin 0:9e9b7db60fd5 81 *(outbuffer + offset + 2) = (this->wrench_length >> (8 * 2)) & 0xFF;
garyservin 0:9e9b7db60fd5 82 *(outbuffer + offset + 3) = (this->wrench_length >> (8 * 3)) & 0xFF;
garyservin 0:9e9b7db60fd5 83 offset += sizeof(this->wrench_length);
garyservin 0:9e9b7db60fd5 84 for( uint32_t i = 0; i < wrench_length; i++){
garyservin 0:9e9b7db60fd5 85 offset += this->wrench[i].serialize(outbuffer + offset);
garyservin 0:9e9b7db60fd5 86 }
garyservin 0:9e9b7db60fd5 87 return offset;
garyservin 0:9e9b7db60fd5 88 }
garyservin 0:9e9b7db60fd5 89
garyservin 0:9e9b7db60fd5 90 virtual int deserialize(unsigned char *inbuffer)
garyservin 0:9e9b7db60fd5 91 {
garyservin 0:9e9b7db60fd5 92 int offset = 0;
garyservin 0:9e9b7db60fd5 93 offset += this->header.deserialize(inbuffer + offset);
garyservin 0:9e9b7db60fd5 94 uint32_t name_lengthT = ((uint32_t) (*(inbuffer + offset)));
garyservin 0:9e9b7db60fd5 95 name_lengthT |= ((uint32_t) (*(inbuffer + offset + 1))) << (8 * 1);
garyservin 0:9e9b7db60fd5 96 name_lengthT |= ((uint32_t) (*(inbuffer + offset + 2))) << (8 * 2);
garyservin 0:9e9b7db60fd5 97 name_lengthT |= ((uint32_t) (*(inbuffer + offset + 3))) << (8 * 3);
garyservin 0:9e9b7db60fd5 98 offset += sizeof(this->name_length);
garyservin 0:9e9b7db60fd5 99 if(name_lengthT > name_length)
garyservin 0:9e9b7db60fd5 100 this->name = (char**)realloc(this->name, name_lengthT * sizeof(char*));
garyservin 0:9e9b7db60fd5 101 name_length = name_lengthT;
garyservin 0:9e9b7db60fd5 102 for( uint32_t i = 0; i < name_length; i++){
garyservin 0:9e9b7db60fd5 103 uint32_t length_st_name;
garyservin 0:9e9b7db60fd5 104 arrToVar(length_st_name, (inbuffer + offset));
garyservin 0:9e9b7db60fd5 105 offset += 4;
garyservin 0:9e9b7db60fd5 106 for(unsigned int k= offset; k< offset+length_st_name; ++k){
garyservin 0:9e9b7db60fd5 107 inbuffer[k-1]=inbuffer[k];
garyservin 0:9e9b7db60fd5 108 }
garyservin 0:9e9b7db60fd5 109 inbuffer[offset+length_st_name-1]=0;
garyservin 0:9e9b7db60fd5 110 this->st_name = (char *)(inbuffer + offset-1);
garyservin 0:9e9b7db60fd5 111 offset += length_st_name;
garyservin 0:9e9b7db60fd5 112 memcpy( &(this->name[i]), &(this->st_name), sizeof(char*));
garyservin 0:9e9b7db60fd5 113 }
garyservin 0:9e9b7db60fd5 114 uint32_t pose_lengthT = ((uint32_t) (*(inbuffer + offset)));
garyservin 0:9e9b7db60fd5 115 pose_lengthT |= ((uint32_t) (*(inbuffer + offset + 1))) << (8 * 1);
garyservin 0:9e9b7db60fd5 116 pose_lengthT |= ((uint32_t) (*(inbuffer + offset + 2))) << (8 * 2);
garyservin 0:9e9b7db60fd5 117 pose_lengthT |= ((uint32_t) (*(inbuffer + offset + 3))) << (8 * 3);
garyservin 0:9e9b7db60fd5 118 offset += sizeof(this->pose_length);
garyservin 0:9e9b7db60fd5 119 if(pose_lengthT > pose_length)
garyservin 0:9e9b7db60fd5 120 this->pose = (geometry_msgs::Pose*)realloc(this->pose, pose_lengthT * sizeof(geometry_msgs::Pose));
garyservin 0:9e9b7db60fd5 121 pose_length = pose_lengthT;
garyservin 0:9e9b7db60fd5 122 for( uint32_t i = 0; i < pose_length; i++){
garyservin 0:9e9b7db60fd5 123 offset += this->st_pose.deserialize(inbuffer + offset);
garyservin 0:9e9b7db60fd5 124 memcpy( &(this->pose[i]), &(this->st_pose), sizeof(geometry_msgs::Pose));
garyservin 0:9e9b7db60fd5 125 }
garyservin 0:9e9b7db60fd5 126 uint32_t twist_lengthT = ((uint32_t) (*(inbuffer + offset)));
garyservin 0:9e9b7db60fd5 127 twist_lengthT |= ((uint32_t) (*(inbuffer + offset + 1))) << (8 * 1);
garyservin 0:9e9b7db60fd5 128 twist_lengthT |= ((uint32_t) (*(inbuffer + offset + 2))) << (8 * 2);
garyservin 0:9e9b7db60fd5 129 twist_lengthT |= ((uint32_t) (*(inbuffer + offset + 3))) << (8 * 3);
garyservin 0:9e9b7db60fd5 130 offset += sizeof(this->twist_length);
garyservin 0:9e9b7db60fd5 131 if(twist_lengthT > twist_length)
garyservin 0:9e9b7db60fd5 132 this->twist = (geometry_msgs::Twist*)realloc(this->twist, twist_lengthT * sizeof(geometry_msgs::Twist));
garyservin 0:9e9b7db60fd5 133 twist_length = twist_lengthT;
garyservin 0:9e9b7db60fd5 134 for( uint32_t i = 0; i < twist_length; i++){
garyservin 0:9e9b7db60fd5 135 offset += this->st_twist.deserialize(inbuffer + offset);
garyservin 0:9e9b7db60fd5 136 memcpy( &(this->twist[i]), &(this->st_twist), sizeof(geometry_msgs::Twist));
garyservin 0:9e9b7db60fd5 137 }
garyservin 0:9e9b7db60fd5 138 uint32_t wrench_lengthT = ((uint32_t) (*(inbuffer + offset)));
garyservin 0:9e9b7db60fd5 139 wrench_lengthT |= ((uint32_t) (*(inbuffer + offset + 1))) << (8 * 1);
garyservin 0:9e9b7db60fd5 140 wrench_lengthT |= ((uint32_t) (*(inbuffer + offset + 2))) << (8 * 2);
garyservin 0:9e9b7db60fd5 141 wrench_lengthT |= ((uint32_t) (*(inbuffer + offset + 3))) << (8 * 3);
garyservin 0:9e9b7db60fd5 142 offset += sizeof(this->wrench_length);
garyservin 0:9e9b7db60fd5 143 if(wrench_lengthT > wrench_length)
garyservin 0:9e9b7db60fd5 144 this->wrench = (geometry_msgs::Wrench*)realloc(this->wrench, wrench_lengthT * sizeof(geometry_msgs::Wrench));
garyservin 0:9e9b7db60fd5 145 wrench_length = wrench_lengthT;
garyservin 0:9e9b7db60fd5 146 for( uint32_t i = 0; i < wrench_length; i++){
garyservin 0:9e9b7db60fd5 147 offset += this->st_wrench.deserialize(inbuffer + offset);
garyservin 0:9e9b7db60fd5 148 memcpy( &(this->wrench[i]), &(this->st_wrench), sizeof(geometry_msgs::Wrench));
garyservin 0:9e9b7db60fd5 149 }
garyservin 0:9e9b7db60fd5 150 return offset;
garyservin 0:9e9b7db60fd5 151 }
garyservin 0:9e9b7db60fd5 152
garyservin 0:9e9b7db60fd5 153 const char * getType(){ return "gazebo_msgs/WorldState"; };
garyservin 0:9e9b7db60fd5 154 const char * getMD5(){ return "de1a9de3ab7ba97ac0e9ec01a4eb481e"; };
garyservin 0:9e9b7db60fd5 155
garyservin 0:9e9b7db60fd5 156 };
garyservin 0:9e9b7db60fd5 157
garyservin 0:9e9b7db60fd5 158 }
garyservin 0:9e9b7db60fd5 159 #endif