ROS Serial library for Mbed platforms for ROS Melodic Morenia. Check http://wiki.ros.org/rosserial_mbed/ for more information.
Dependents: rosserial_mbed_hello_world_publisher_melodic Motortest Nucleo_vr_servo_project NucleoFM ... more
ROSSerial_mbed for Melodic 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_melodic
rosserial_mbed Hello World example for Melodic Morenia 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(); } }
Diff: sensor_msgs/PointCloud2.h
- Revision:
- 0:04ac6be8229a
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/sensor_msgs/PointCloud2.h Fri Nov 08 14:38:09 2019 -0300 @@ -0,0 +1,185 @@ +#ifndef _ROS_sensor_msgs_PointCloud2_h +#define _ROS_sensor_msgs_PointCloud2_h + +#include <stdint.h> +#include <string.h> +#include <stdlib.h> +#include "ros/msg.h" +#include "std_msgs/Header.h" +#include "sensor_msgs/PointField.h" + +namespace sensor_msgs +{ + + class PointCloud2 : public ros::Msg + { + public: + typedef std_msgs::Header _header_type; + _header_type header; + typedef uint32_t _height_type; + _height_type height; + typedef uint32_t _width_type; + _width_type width; + uint32_t fields_length; + typedef sensor_msgs::PointField _fields_type; + _fields_type st_fields; + _fields_type * fields; + typedef bool _is_bigendian_type; + _is_bigendian_type is_bigendian; + typedef uint32_t _point_step_type; + _point_step_type point_step; + typedef uint32_t _row_step_type; + _row_step_type row_step; + uint32_t data_length; + typedef uint8_t _data_type; + _data_type st_data; + _data_type * data; + typedef bool _is_dense_type; + _is_dense_type is_dense; + + PointCloud2(): + header(), + height(0), + width(0), + fields_length(0), fields(NULL), + is_bigendian(0), + point_step(0), + row_step(0), + data_length(0), data(NULL), + is_dense(0) + { + } + + virtual int serialize(unsigned char *outbuffer) const + { + int offset = 0; + offset += this->header.serialize(outbuffer + offset); + *(outbuffer + offset + 0) = (this->height >> (8 * 0)) & 0xFF; + *(outbuffer + offset + 1) = (this->height >> (8 * 1)) & 0xFF; + *(outbuffer + offset + 2) = (this->height >> (8 * 2)) & 0xFF; + *(outbuffer + offset + 3) = (this->height >> (8 * 3)) & 0xFF; + offset += sizeof(this->height); + *(outbuffer + offset + 0) = (this->width >> (8 * 0)) & 0xFF; + *(outbuffer + offset + 1) = (this->width >> (8 * 1)) & 0xFF; + *(outbuffer + offset + 2) = (this->width >> (8 * 2)) & 0xFF; + *(outbuffer + offset + 3) = (this->width >> (8 * 3)) & 0xFF; + offset += sizeof(this->width); + *(outbuffer + offset + 0) = (this->fields_length >> (8 * 0)) & 0xFF; + *(outbuffer + offset + 1) = (this->fields_length >> (8 * 1)) & 0xFF; + *(outbuffer + offset + 2) = (this->fields_length >> (8 * 2)) & 0xFF; + *(outbuffer + offset + 3) = (this->fields_length >> (8 * 3)) & 0xFF; + offset += sizeof(this->fields_length); + for( uint32_t i = 0; i < fields_length; i++){ + offset += this->fields[i].serialize(outbuffer + offset); + } + union { + bool real; + uint8_t base; + } u_is_bigendian; + u_is_bigendian.real = this->is_bigendian; + *(outbuffer + offset + 0) = (u_is_bigendian.base >> (8 * 0)) & 0xFF; + offset += sizeof(this->is_bigendian); + *(outbuffer + offset + 0) = (this->point_step >> (8 * 0)) & 0xFF; + *(outbuffer + offset + 1) = (this->point_step >> (8 * 1)) & 0xFF; + *(outbuffer + offset + 2) = (this->point_step >> (8 * 2)) & 0xFF; + *(outbuffer + offset + 3) = (this->point_step >> (8 * 3)) & 0xFF; + offset += sizeof(this->point_step); + *(outbuffer + offset + 0) = (this->row_step >> (8 * 0)) & 0xFF; + *(outbuffer + offset + 1) = (this->row_step >> (8 * 1)) & 0xFF; + *(outbuffer + offset + 2) = (this->row_step >> (8 * 2)) & 0xFF; + *(outbuffer + offset + 3) = (this->row_step >> (8 * 3)) & 0xFF; + offset += sizeof(this->row_step); + *(outbuffer + offset + 0) = (this->data_length >> (8 * 0)) & 0xFF; + *(outbuffer + offset + 1) = (this->data_length >> (8 * 1)) & 0xFF; + *(outbuffer + offset + 2) = (this->data_length >> (8 * 2)) & 0xFF; + *(outbuffer + offset + 3) = (this->data_length >> (8 * 3)) & 0xFF; + offset += sizeof(this->data_length); + for( uint32_t i = 0; i < data_length; i++){ + *(outbuffer + offset + 0) = (this->data[i] >> (8 * 0)) & 0xFF; + offset += sizeof(this->data[i]); + } + union { + bool real; + uint8_t base; + } u_is_dense; + u_is_dense.real = this->is_dense; + *(outbuffer + offset + 0) = (u_is_dense.base >> (8 * 0)) & 0xFF; + offset += sizeof(this->is_dense); + return offset; + } + + virtual int deserialize(unsigned char *inbuffer) + { + int offset = 0; + offset += this->header.deserialize(inbuffer + offset); + this->height = ((uint32_t) (*(inbuffer + offset))); + this->height |= ((uint32_t) (*(inbuffer + offset + 1))) << (8 * 1); + this->height |= ((uint32_t) (*(inbuffer + offset + 2))) << (8 * 2); + this->height |= ((uint32_t) (*(inbuffer + offset + 3))) << (8 * 3); + offset += sizeof(this->height); + this->width = ((uint32_t) (*(inbuffer + offset))); + this->width |= ((uint32_t) (*(inbuffer + offset + 1))) << (8 * 1); + this->width |= ((uint32_t) (*(inbuffer + offset + 2))) << (8 * 2); + this->width |= ((uint32_t) (*(inbuffer + offset + 3))) << (8 * 3); + offset += sizeof(this->width); + uint32_t fields_lengthT = ((uint32_t) (*(inbuffer + offset))); + fields_lengthT |= ((uint32_t) (*(inbuffer + offset + 1))) << (8 * 1); + fields_lengthT |= ((uint32_t) (*(inbuffer + offset + 2))) << (8 * 2); + fields_lengthT |= ((uint32_t) (*(inbuffer + offset + 3))) << (8 * 3); + offset += sizeof(this->fields_length); + if(fields_lengthT > fields_length) + this->fields = (sensor_msgs::PointField*)realloc(this->fields, fields_lengthT * sizeof(sensor_msgs::PointField)); + fields_length = fields_lengthT; + for( uint32_t i = 0; i < fields_length; i++){ + offset += this->st_fields.deserialize(inbuffer + offset); + memcpy( &(this->fields[i]), &(this->st_fields), sizeof(sensor_msgs::PointField)); + } + union { + bool real; + uint8_t base; + } u_is_bigendian; + u_is_bigendian.base = 0; + u_is_bigendian.base |= ((uint8_t) (*(inbuffer + offset + 0))) << (8 * 0); + this->is_bigendian = u_is_bigendian.real; + offset += sizeof(this->is_bigendian); + this->point_step = ((uint32_t) (*(inbuffer + offset))); + this->point_step |= ((uint32_t) (*(inbuffer + offset + 1))) << (8 * 1); + this->point_step |= ((uint32_t) (*(inbuffer + offset + 2))) << (8 * 2); + this->point_step |= ((uint32_t) (*(inbuffer + offset + 3))) << (8 * 3); + offset += sizeof(this->point_step); + this->row_step = ((uint32_t) (*(inbuffer + offset))); + this->row_step |= ((uint32_t) (*(inbuffer + offset + 1))) << (8 * 1); + this->row_step |= ((uint32_t) (*(inbuffer + offset + 2))) << (8 * 2); + this->row_step |= ((uint32_t) (*(inbuffer + offset + 3))) << (8 * 3); + offset += sizeof(this->row_step); + uint32_t data_lengthT = ((uint32_t) (*(inbuffer + offset))); + data_lengthT |= ((uint32_t) (*(inbuffer + offset + 1))) << (8 * 1); + data_lengthT |= ((uint32_t) (*(inbuffer + offset + 2))) << (8 * 2); + data_lengthT |= ((uint32_t) (*(inbuffer + offset + 3))) << (8 * 3); + offset += sizeof(this->data_length); + if(data_lengthT > data_length) + this->data = (uint8_t*)realloc(this->data, data_lengthT * sizeof(uint8_t)); + data_length = data_lengthT; + for( uint32_t i = 0; i < data_length; i++){ + this->st_data = ((uint8_t) (*(inbuffer + offset))); + offset += sizeof(this->st_data); + memcpy( &(this->data[i]), &(this->st_data), sizeof(uint8_t)); + } + union { + bool real; + uint8_t base; + } u_is_dense; + u_is_dense.base = 0; + u_is_dense.base |= ((uint8_t) (*(inbuffer + offset + 0))) << (8 * 0); + this->is_dense = u_is_dense.real; + offset += sizeof(this->is_dense); + return offset; + } + + const char * getType(){ return "sensor_msgs/PointCloud2"; }; + const char * getMD5(){ return "1158d486dd51d683ce2f1be655c3c181"; }; + + }; + +} +#endif