Gary Servin / ros_lib_indigo

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

Dependencies:   BufferedSerial

Dependents:   rosserial_mbed_hello_world_publisher rtos_base_control rosserial_mbed_F64MA ROS-RTOS ... more

ROSSerial_mbed for Indigo 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

rosserial_mbed Hello World

Last commit 19 Apr 2016 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();
    }
}

Diff: dynamic_reconfigure/Config.h

Revision:
0:fd24f7ca9688
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dynamic_reconfigure/Config.h	Thu Mar 31 14:22:59 2016 +0000
@@ -0,0 +1,143 @@
+#ifndef _ROS_dynamic_reconfigure_Config_h
+#define _ROS_dynamic_reconfigure_Config_h
+
+#include <stdint.h>
+#include <string.h>
+#include <stdlib.h>
+#include "ros/msg.h"
+#include "dynamic_reconfigure/BoolParameter.h"
+#include "dynamic_reconfigure/IntParameter.h"
+#include "dynamic_reconfigure/StrParameter.h"
+#include "dynamic_reconfigure/DoubleParameter.h"
+#include "dynamic_reconfigure/GroupState.h"
+
+namespace dynamic_reconfigure
+{
+
+  class Config : public ros::Msg
+  {
+    public:
+      uint8_t bools_length;
+      dynamic_reconfigure::BoolParameter st_bools;
+      dynamic_reconfigure::BoolParameter * bools;
+      uint8_t ints_length;
+      dynamic_reconfigure::IntParameter st_ints;
+      dynamic_reconfigure::IntParameter * ints;
+      uint8_t strs_length;
+      dynamic_reconfigure::StrParameter st_strs;
+      dynamic_reconfigure::StrParameter * strs;
+      uint8_t doubles_length;
+      dynamic_reconfigure::DoubleParameter st_doubles;
+      dynamic_reconfigure::DoubleParameter * doubles;
+      uint8_t groups_length;
+      dynamic_reconfigure::GroupState st_groups;
+      dynamic_reconfigure::GroupState * groups;
+
+    Config():
+      bools_length(0), bools(NULL),
+      ints_length(0), ints(NULL),
+      strs_length(0), strs(NULL),
+      doubles_length(0), doubles(NULL),
+      groups_length(0), groups(NULL)
+    {
+    }
+
+    virtual int serialize(unsigned char *outbuffer) const
+    {
+      int offset = 0;
+      *(outbuffer + offset++) = bools_length;
+      *(outbuffer + offset++) = 0;
+      *(outbuffer + offset++) = 0;
+      *(outbuffer + offset++) = 0;
+      for( uint8_t i = 0; i < bools_length; i++){
+      offset += this->bools[i].serialize(outbuffer + offset);
+      }
+      *(outbuffer + offset++) = ints_length;
+      *(outbuffer + offset++) = 0;
+      *(outbuffer + offset++) = 0;
+      *(outbuffer + offset++) = 0;
+      for( uint8_t i = 0; i < ints_length; i++){
+      offset += this->ints[i].serialize(outbuffer + offset);
+      }
+      *(outbuffer + offset++) = strs_length;
+      *(outbuffer + offset++) = 0;
+      *(outbuffer + offset++) = 0;
+      *(outbuffer + offset++) = 0;
+      for( uint8_t i = 0; i < strs_length; i++){
+      offset += this->strs[i].serialize(outbuffer + offset);
+      }
+      *(outbuffer + offset++) = doubles_length;
+      *(outbuffer + offset++) = 0;
+      *(outbuffer + offset++) = 0;
+      *(outbuffer + offset++) = 0;
+      for( uint8_t i = 0; i < doubles_length; i++){
+      offset += this->doubles[i].serialize(outbuffer + offset);
+      }
+      *(outbuffer + offset++) = groups_length;
+      *(outbuffer + offset++) = 0;
+      *(outbuffer + offset++) = 0;
+      *(outbuffer + offset++) = 0;
+      for( uint8_t i = 0; i < groups_length; i++){
+      offset += this->groups[i].serialize(outbuffer + offset);
+      }
+      return offset;
+    }
+
+    virtual int deserialize(unsigned char *inbuffer)
+    {
+      int offset = 0;
+      uint8_t bools_lengthT = *(inbuffer + offset++);
+      if(bools_lengthT > bools_length)
+        this->bools = (dynamic_reconfigure::BoolParameter*)realloc(this->bools, bools_lengthT * sizeof(dynamic_reconfigure::BoolParameter));
+      offset += 3;
+      bools_length = bools_lengthT;
+      for( uint8_t i = 0; i < bools_length; i++){
+      offset += this->st_bools.deserialize(inbuffer + offset);
+        memcpy( &(this->bools[i]), &(this->st_bools), sizeof(dynamic_reconfigure::BoolParameter));
+      }
+      uint8_t ints_lengthT = *(inbuffer + offset++);
+      if(ints_lengthT > ints_length)
+        this->ints = (dynamic_reconfigure::IntParameter*)realloc(this->ints, ints_lengthT * sizeof(dynamic_reconfigure::IntParameter));
+      offset += 3;
+      ints_length = ints_lengthT;
+      for( uint8_t i = 0; i < ints_length; i++){
+      offset += this->st_ints.deserialize(inbuffer + offset);
+        memcpy( &(this->ints[i]), &(this->st_ints), sizeof(dynamic_reconfigure::IntParameter));
+      }
+      uint8_t strs_lengthT = *(inbuffer + offset++);
+      if(strs_lengthT > strs_length)
+        this->strs = (dynamic_reconfigure::StrParameter*)realloc(this->strs, strs_lengthT * sizeof(dynamic_reconfigure::StrParameter));
+      offset += 3;
+      strs_length = strs_lengthT;
+      for( uint8_t i = 0; i < strs_length; i++){
+      offset += this->st_strs.deserialize(inbuffer + offset);
+        memcpy( &(this->strs[i]), &(this->st_strs), sizeof(dynamic_reconfigure::StrParameter));
+      }
+      uint8_t doubles_lengthT = *(inbuffer + offset++);
+      if(doubles_lengthT > doubles_length)
+        this->doubles = (dynamic_reconfigure::DoubleParameter*)realloc(this->doubles, doubles_lengthT * sizeof(dynamic_reconfigure::DoubleParameter));
+      offset += 3;
+      doubles_length = doubles_lengthT;
+      for( uint8_t i = 0; i < doubles_length; i++){
+      offset += this->st_doubles.deserialize(inbuffer + offset);
+        memcpy( &(this->doubles[i]), &(this->st_doubles), sizeof(dynamic_reconfigure::DoubleParameter));
+      }
+      uint8_t groups_lengthT = *(inbuffer + offset++);
+      if(groups_lengthT > groups_length)
+        this->groups = (dynamic_reconfigure::GroupState*)realloc(this->groups, groups_lengthT * sizeof(dynamic_reconfigure::GroupState));
+      offset += 3;
+      groups_length = groups_lengthT;
+      for( uint8_t i = 0; i < groups_length; i++){
+      offset += this->st_groups.deserialize(inbuffer + offset);
+        memcpy( &(this->groups[i]), &(this->st_groups), sizeof(dynamic_reconfigure::GroupState));
+      }
+     return offset;
+    }
+
+    const char * getType(){ return "dynamic_reconfigure/Config"; };
+    const char * getMD5(){ return "958f16a05573709014982821e6822580"; };
+
+  };
+
+}
+#endif
\ No newline at end of file