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(); } }
trajectory_msgs/JointTrajectoryPoint.h
- Committer:
- garyservin
- Date:
- 2016-03-31
- Revision:
- 0:fd24f7ca9688
File content as of revision 0:fd24f7ca9688:
#ifndef _ROS_trajectory_msgs_JointTrajectoryPoint_h #define _ROS_trajectory_msgs_JointTrajectoryPoint_h #include <stdint.h> #include <string.h> #include <stdlib.h> #include "ros/msg.h" #include "ros/duration.h" namespace trajectory_msgs { class JointTrajectoryPoint : public ros::Msg { public: uint8_t positions_length; double st_positions; double * positions; uint8_t velocities_length; double st_velocities; double * velocities; uint8_t accelerations_length; double st_accelerations; double * accelerations; uint8_t effort_length; double st_effort; double * effort; ros::Duration time_from_start; JointTrajectoryPoint(): positions_length(0), positions(NULL), velocities_length(0), velocities(NULL), accelerations_length(0), accelerations(NULL), effort_length(0), effort(NULL), time_from_start() { } virtual int serialize(unsigned char *outbuffer) const { int offset = 0; *(outbuffer + offset++) = positions_length; *(outbuffer + offset++) = 0; *(outbuffer + offset++) = 0; *(outbuffer + offset++) = 0; for( uint8_t i = 0; i < positions_length; i++){ union { double real; uint64_t base; } u_positionsi; u_positionsi.real = this->positions[i]; *(outbuffer + offset + 0) = (u_positionsi.base >> (8 * 0)) & 0xFF; *(outbuffer + offset + 1) = (u_positionsi.base >> (8 * 1)) & 0xFF; *(outbuffer + offset + 2) = (u_positionsi.base >> (8 * 2)) & 0xFF; *(outbuffer + offset + 3) = (u_positionsi.base >> (8 * 3)) & 0xFF; *(outbuffer + offset + 4) = (u_positionsi.base >> (8 * 4)) & 0xFF; *(outbuffer + offset + 5) = (u_positionsi.base >> (8 * 5)) & 0xFF; *(outbuffer + offset + 6) = (u_positionsi.base >> (8 * 6)) & 0xFF; *(outbuffer + offset + 7) = (u_positionsi.base >> (8 * 7)) & 0xFF; offset += sizeof(this->positions[i]); } *(outbuffer + offset++) = velocities_length; *(outbuffer + offset++) = 0; *(outbuffer + offset++) = 0; *(outbuffer + offset++) = 0; for( uint8_t i = 0; i < velocities_length; i++){ union { double real; uint64_t base; } u_velocitiesi; u_velocitiesi.real = this->velocities[i]; *(outbuffer + offset + 0) = (u_velocitiesi.base >> (8 * 0)) & 0xFF; *(outbuffer + offset + 1) = (u_velocitiesi.base >> (8 * 1)) & 0xFF; *(outbuffer + offset + 2) = (u_velocitiesi.base >> (8 * 2)) & 0xFF; *(outbuffer + offset + 3) = (u_velocitiesi.base >> (8 * 3)) & 0xFF; *(outbuffer + offset + 4) = (u_velocitiesi.base >> (8 * 4)) & 0xFF; *(outbuffer + offset + 5) = (u_velocitiesi.base >> (8 * 5)) & 0xFF; *(outbuffer + offset + 6) = (u_velocitiesi.base >> (8 * 6)) & 0xFF; *(outbuffer + offset + 7) = (u_velocitiesi.base >> (8 * 7)) & 0xFF; offset += sizeof(this->velocities[i]); } *(outbuffer + offset++) = accelerations_length; *(outbuffer + offset++) = 0; *(outbuffer + offset++) = 0; *(outbuffer + offset++) = 0; for( uint8_t i = 0; i < accelerations_length; i++){ union { double real; uint64_t base; } u_accelerationsi; u_accelerationsi.real = this->accelerations[i]; *(outbuffer + offset + 0) = (u_accelerationsi.base >> (8 * 0)) & 0xFF; *(outbuffer + offset + 1) = (u_accelerationsi.base >> (8 * 1)) & 0xFF; *(outbuffer + offset + 2) = (u_accelerationsi.base >> (8 * 2)) & 0xFF; *(outbuffer + offset + 3) = (u_accelerationsi.base >> (8 * 3)) & 0xFF; *(outbuffer + offset + 4) = (u_accelerationsi.base >> (8 * 4)) & 0xFF; *(outbuffer + offset + 5) = (u_accelerationsi.base >> (8 * 5)) & 0xFF; *(outbuffer + offset + 6) = (u_accelerationsi.base >> (8 * 6)) & 0xFF; *(outbuffer + offset + 7) = (u_accelerationsi.base >> (8 * 7)) & 0xFF; offset += sizeof(this->accelerations[i]); } *(outbuffer + offset++) = effort_length; *(outbuffer + offset++) = 0; *(outbuffer + offset++) = 0; *(outbuffer + offset++) = 0; for( uint8_t i = 0; i < effort_length; i++){ union { double real; uint64_t base; } u_efforti; u_efforti.real = this->effort[i]; *(outbuffer + offset + 0) = (u_efforti.base >> (8 * 0)) & 0xFF; *(outbuffer + offset + 1) = (u_efforti.base >> (8 * 1)) & 0xFF; *(outbuffer + offset + 2) = (u_efforti.base >> (8 * 2)) & 0xFF; *(outbuffer + offset + 3) = (u_efforti.base >> (8 * 3)) & 0xFF; *(outbuffer + offset + 4) = (u_efforti.base >> (8 * 4)) & 0xFF; *(outbuffer + offset + 5) = (u_efforti.base >> (8 * 5)) & 0xFF; *(outbuffer + offset + 6) = (u_efforti.base >> (8 * 6)) & 0xFF; *(outbuffer + offset + 7) = (u_efforti.base >> (8 * 7)) & 0xFF; offset += sizeof(this->effort[i]); } *(outbuffer + offset + 0) = (this->time_from_start.sec >> (8 * 0)) & 0xFF; *(outbuffer + offset + 1) = (this->time_from_start.sec >> (8 * 1)) & 0xFF; *(outbuffer + offset + 2) = (this->time_from_start.sec >> (8 * 2)) & 0xFF; *(outbuffer + offset + 3) = (this->time_from_start.sec >> (8 * 3)) & 0xFF; offset += sizeof(this->time_from_start.sec); *(outbuffer + offset + 0) = (this->time_from_start.nsec >> (8 * 0)) & 0xFF; *(outbuffer + offset + 1) = (this->time_from_start.nsec >> (8 * 1)) & 0xFF; *(outbuffer + offset + 2) = (this->time_from_start.nsec >> (8 * 2)) & 0xFF; *(outbuffer + offset + 3) = (this->time_from_start.nsec >> (8 * 3)) & 0xFF; offset += sizeof(this->time_from_start.nsec); return offset; } virtual int deserialize(unsigned char *inbuffer) { int offset = 0; uint8_t positions_lengthT = *(inbuffer + offset++); if(positions_lengthT > positions_length) this->positions = (double*)realloc(this->positions, positions_lengthT * sizeof(double)); offset += 3; positions_length = positions_lengthT; for( uint8_t i = 0; i < positions_length; i++){ union { double real; uint64_t base; } u_st_positions; u_st_positions.base = 0; u_st_positions.base |= ((uint64_t) (*(inbuffer + offset + 0))) << (8 * 0); u_st_positions.base |= ((uint64_t) (*(inbuffer + offset + 1))) << (8 * 1); u_st_positions.base |= ((uint64_t) (*(inbuffer + offset + 2))) << (8 * 2); u_st_positions.base |= ((uint64_t) (*(inbuffer + offset + 3))) << (8 * 3); u_st_positions.base |= ((uint64_t) (*(inbuffer + offset + 4))) << (8 * 4); u_st_positions.base |= ((uint64_t) (*(inbuffer + offset + 5))) << (8 * 5); u_st_positions.base |= ((uint64_t) (*(inbuffer + offset + 6))) << (8 * 6); u_st_positions.base |= ((uint64_t) (*(inbuffer + offset + 7))) << (8 * 7); this->st_positions = u_st_positions.real; offset += sizeof(this->st_positions); memcpy( &(this->positions[i]), &(this->st_positions), sizeof(double)); } uint8_t velocities_lengthT = *(inbuffer + offset++); if(velocities_lengthT > velocities_length) this->velocities = (double*)realloc(this->velocities, velocities_lengthT * sizeof(double)); offset += 3; velocities_length = velocities_lengthT; for( uint8_t i = 0; i < velocities_length; i++){ union { double real; uint64_t base; } u_st_velocities; u_st_velocities.base = 0; u_st_velocities.base |= ((uint64_t) (*(inbuffer + offset + 0))) << (8 * 0); u_st_velocities.base |= ((uint64_t) (*(inbuffer + offset + 1))) << (8 * 1); u_st_velocities.base |= ((uint64_t) (*(inbuffer + offset + 2))) << (8 * 2); u_st_velocities.base |= ((uint64_t) (*(inbuffer + offset + 3))) << (8 * 3); u_st_velocities.base |= ((uint64_t) (*(inbuffer + offset + 4))) << (8 * 4); u_st_velocities.base |= ((uint64_t) (*(inbuffer + offset + 5))) << (8 * 5); u_st_velocities.base |= ((uint64_t) (*(inbuffer + offset + 6))) << (8 * 6); u_st_velocities.base |= ((uint64_t) (*(inbuffer + offset + 7))) << (8 * 7); this->st_velocities = u_st_velocities.real; offset += sizeof(this->st_velocities); memcpy( &(this->velocities[i]), &(this->st_velocities), sizeof(double)); } uint8_t accelerations_lengthT = *(inbuffer + offset++); if(accelerations_lengthT > accelerations_length) this->accelerations = (double*)realloc(this->accelerations, accelerations_lengthT * sizeof(double)); offset += 3; accelerations_length = accelerations_lengthT; for( uint8_t i = 0; i < accelerations_length; i++){ union { double real; uint64_t base; } u_st_accelerations; u_st_accelerations.base = 0; u_st_accelerations.base |= ((uint64_t) (*(inbuffer + offset + 0))) << (8 * 0); u_st_accelerations.base |= ((uint64_t) (*(inbuffer + offset + 1))) << (8 * 1); u_st_accelerations.base |= ((uint64_t) (*(inbuffer + offset + 2))) << (8 * 2); u_st_accelerations.base |= ((uint64_t) (*(inbuffer + offset + 3))) << (8 * 3); u_st_accelerations.base |= ((uint64_t) (*(inbuffer + offset + 4))) << (8 * 4); u_st_accelerations.base |= ((uint64_t) (*(inbuffer + offset + 5))) << (8 * 5); u_st_accelerations.base |= ((uint64_t) (*(inbuffer + offset + 6))) << (8 * 6); u_st_accelerations.base |= ((uint64_t) (*(inbuffer + offset + 7))) << (8 * 7); this->st_accelerations = u_st_accelerations.real; offset += sizeof(this->st_accelerations); memcpy( &(this->accelerations[i]), &(this->st_accelerations), sizeof(double)); } uint8_t effort_lengthT = *(inbuffer + offset++); if(effort_lengthT > effort_length) this->effort = (double*)realloc(this->effort, effort_lengthT * sizeof(double)); offset += 3; effort_length = effort_lengthT; for( uint8_t i = 0; i < effort_length; i++){ union { double real; uint64_t base; } u_st_effort; u_st_effort.base = 0; u_st_effort.base |= ((uint64_t) (*(inbuffer + offset + 0))) << (8 * 0); u_st_effort.base |= ((uint64_t) (*(inbuffer + offset + 1))) << (8 * 1); u_st_effort.base |= ((uint64_t) (*(inbuffer + offset + 2))) << (8 * 2); u_st_effort.base |= ((uint64_t) (*(inbuffer + offset + 3))) << (8 * 3); u_st_effort.base |= ((uint64_t) (*(inbuffer + offset + 4))) << (8 * 4); u_st_effort.base |= ((uint64_t) (*(inbuffer + offset + 5))) << (8 * 5); u_st_effort.base |= ((uint64_t) (*(inbuffer + offset + 6))) << (8 * 6); u_st_effort.base |= ((uint64_t) (*(inbuffer + offset + 7))) << (8 * 7); this->st_effort = u_st_effort.real; offset += sizeof(this->st_effort); memcpy( &(this->effort[i]), &(this->st_effort), sizeof(double)); } this->time_from_start.sec = ((uint32_t) (*(inbuffer + offset))); this->time_from_start.sec |= ((uint32_t) (*(inbuffer + offset + 1))) << (8 * 1); this->time_from_start.sec |= ((uint32_t) (*(inbuffer + offset + 2))) << (8 * 2); this->time_from_start.sec |= ((uint32_t) (*(inbuffer + offset + 3))) << (8 * 3); offset += sizeof(this->time_from_start.sec); this->time_from_start.nsec = ((uint32_t) (*(inbuffer + offset))); this->time_from_start.nsec |= ((uint32_t) (*(inbuffer + offset + 1))) << (8 * 1); this->time_from_start.nsec |= ((uint32_t) (*(inbuffer + offset + 2))) << (8 * 2); this->time_from_start.nsec |= ((uint32_t) (*(inbuffer + offset + 3))) << (8 * 3); offset += sizeof(this->time_from_start.nsec); return offset; } const char * getType(){ return "trajectory_msgs/JointTrajectoryPoint"; }; const char * getMD5(){ return "f3cd1e1c4d320c79d6985c904ae5dcd3"; }; }; } #endif