ROS Serial library for Mbed platforms for ROS Indigo Igloo. Check http://wiki.ros.org/rosserial_mbed/ for more information
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
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(); } }
gazebo_msgs/ModelStates.h
- Committer:
- garyservin
- Date:
- 2016-03-31
- Revision:
- 0:fd24f7ca9688
File content as of revision 0:fd24f7ca9688:
#ifndef _ROS_gazebo_msgs_ModelStates_h #define _ROS_gazebo_msgs_ModelStates_h #include <stdint.h> #include <string.h> #include <stdlib.h> #include "ros/msg.h" #include "geometry_msgs/Pose.h" #include "geometry_msgs/Twist.h" namespace gazebo_msgs { class ModelStates : public ros::Msg { public: uint8_t name_length; char* st_name; char* * name; uint8_t pose_length; geometry_msgs::Pose st_pose; geometry_msgs::Pose * pose; uint8_t twist_length; geometry_msgs::Twist st_twist; geometry_msgs::Twist * twist; ModelStates(): name_length(0), name(NULL), pose_length(0), pose(NULL), twist_length(0), twist(NULL) { } virtual int serialize(unsigned char *outbuffer) const { int offset = 0; *(outbuffer + offset++) = name_length; *(outbuffer + offset++) = 0; *(outbuffer + offset++) = 0; *(outbuffer + offset++) = 0; for( uint8_t i = 0; i < name_length; i++){ uint32_t length_namei = strlen(this->name[i]); memcpy(outbuffer + offset, &length_namei, sizeof(uint32_t)); offset += 4; memcpy(outbuffer + offset, this->name[i], length_namei); offset += length_namei; } *(outbuffer + offset++) = pose_length; *(outbuffer + offset++) = 0; *(outbuffer + offset++) = 0; *(outbuffer + offset++) = 0; for( uint8_t i = 0; i < pose_length; i++){ offset += this->pose[i].serialize(outbuffer + offset); } *(outbuffer + offset++) = twist_length; *(outbuffer + offset++) = 0; *(outbuffer + offset++) = 0; *(outbuffer + offset++) = 0; for( uint8_t i = 0; i < twist_length; i++){ offset += this->twist[i].serialize(outbuffer + offset); } return offset; } virtual int deserialize(unsigned char *inbuffer) { int offset = 0; uint8_t name_lengthT = *(inbuffer + offset++); if(name_lengthT > name_length) this->name = (char**)realloc(this->name, name_lengthT * sizeof(char*)); offset += 3; name_length = name_lengthT; for( uint8_t i = 0; i < name_length; i++){ uint32_t length_st_name; memcpy(&length_st_name, (inbuffer + offset), sizeof(uint32_t)); offset += 4; for(unsigned int k= offset; k< offset+length_st_name; ++k){ inbuffer[k-1]=inbuffer[k]; } inbuffer[offset+length_st_name-1]=0; this->st_name = (char *)(inbuffer + offset-1); offset += length_st_name; memcpy( &(this->name[i]), &(this->st_name), sizeof(char*)); } uint8_t pose_lengthT = *(inbuffer + offset++); if(pose_lengthT > pose_length) this->pose = (geometry_msgs::Pose*)realloc(this->pose, pose_lengthT * sizeof(geometry_msgs::Pose)); offset += 3; pose_length = pose_lengthT; for( uint8_t i = 0; i < pose_length; i++){ offset += this->st_pose.deserialize(inbuffer + offset); memcpy( &(this->pose[i]), &(this->st_pose), sizeof(geometry_msgs::Pose)); } uint8_t twist_lengthT = *(inbuffer + offset++); if(twist_lengthT > twist_length) this->twist = (geometry_msgs::Twist*)realloc(this->twist, twist_lengthT * sizeof(geometry_msgs::Twist)); offset += 3; twist_length = twist_lengthT; for( uint8_t i = 0; i < twist_length; i++){ offset += this->st_twist.deserialize(inbuffer + offset); memcpy( &(this->twist[i]), &(this->st_twist), sizeof(geometry_msgs::Twist)); } return offset; } const char * getType(){ return "gazebo_msgs/ModelStates"; }; const char * getMD5(){ return "48c080191eb15c41858319b4d8a609c2"; }; }; } #endif