ROS Serial library for Mbed platforms for ROS Kinetic Kame. Check http://wiki.ros.org/rosserial_mbed/ for more information.
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(); } }
Diff: diagnostic_msgs/DiagnosticArray.h
- Revision:
- 0:9e9b7db60fd5
diff -r 000000000000 -r 9e9b7db60fd5 diagnostic_msgs/DiagnosticArray.h --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/diagnostic_msgs/DiagnosticArray.h Sat Dec 31 00:48:34 2016 +0000 @@ -0,0 +1,70 @@ +#ifndef _ROS_diagnostic_msgs_DiagnosticArray_h +#define _ROS_diagnostic_msgs_DiagnosticArray_h + +#include <stdint.h> +#include <string.h> +#include <stdlib.h> +#include "ros/msg.h" +#include "std_msgs/Header.h" +#include "diagnostic_msgs/DiagnosticStatus.h" + +namespace diagnostic_msgs +{ + + class DiagnosticArray : public ros::Msg + { + public: + typedef std_msgs::Header _header_type; + _header_type header; + uint32_t status_length; + typedef diagnostic_msgs::DiagnosticStatus _status_type; + _status_type st_status; + _status_type * status; + + DiagnosticArray(): + header(), + status_length(0), status(NULL) + { + } + + virtual int serialize(unsigned char *outbuffer) const + { + int offset = 0; + offset += this->header.serialize(outbuffer + offset); + *(outbuffer + offset + 0) = (this->status_length >> (8 * 0)) & 0xFF; + *(outbuffer + offset + 1) = (this->status_length >> (8 * 1)) & 0xFF; + *(outbuffer + offset + 2) = (this->status_length >> (8 * 2)) & 0xFF; + *(outbuffer + offset + 3) = (this->status_length >> (8 * 3)) & 0xFF; + offset += sizeof(this->status_length); + for( uint32_t i = 0; i < status_length; i++){ + offset += this->status[i].serialize(outbuffer + offset); + } + return offset; + } + + virtual int deserialize(unsigned char *inbuffer) + { + int offset = 0; + offset += this->header.deserialize(inbuffer + offset); + uint32_t status_lengthT = ((uint32_t) (*(inbuffer + offset))); + status_lengthT |= ((uint32_t) (*(inbuffer + offset + 1))) << (8 * 1); + status_lengthT |= ((uint32_t) (*(inbuffer + offset + 2))) << (8 * 2); + status_lengthT |= ((uint32_t) (*(inbuffer + offset + 3))) << (8 * 3); + offset += sizeof(this->status_length); + if(status_lengthT > status_length) + this->status = (diagnostic_msgs::DiagnosticStatus*)realloc(this->status, status_lengthT * sizeof(diagnostic_msgs::DiagnosticStatus)); + status_length = status_lengthT; + for( uint32_t i = 0; i < status_length; i++){ + offset += this->st_status.deserialize(inbuffer + offset); + memcpy( &(this->status[i]), &(this->st_status), sizeof(diagnostic_msgs::DiagnosticStatus)); + } + return offset; + } + + const char * getType(){ return "diagnostic_msgs/DiagnosticArray"; }; + const char * getMD5(){ return "60810da900de1dd6ddd437c3503511da"; }; + + }; + +} +#endif \ No newline at end of file