Guidance UART ROS

[TreLosOyk]

Hello,
I'm able to setup guidance to work with ROS over USB, but I'm not able or even sure whether it is compatibe with ROS over UART

[tangketan]

The UART example should also work with ROS with little modification, although we don't recommend this approach, since the UART interface is designed for very simple MCU's.

[ym19920319]

hello.
I used Guidance -SDK-ROS to work ,but there are several errors
for example ：/home/exbot/catkin_ws/src/Guidance-SDK-ROS/src/GuidanceNode.cpp: In function ‘int my_callback(int, int, char*)’:
/home/exbot/catkin_ws/src/Guidance-SDK-ROS/src/GuidanceNode.cpp:85:42: error: ‘imshow’ was not declared in this scope
imshow("left", g_greyscale_image_left);
^
/home/exbot/catkin_ws/src/Guidance-SDK-ROS/src/GuidanceNode.cpp:96:43: error: ‘imshow’ was not declared in this scope
imshow("right", g_greyscale_image_right);
I tried to all ways what I could to cope it ,but failed to it .Could you help me with it ,thanks!

[tangketan]

@ym19920319 imshow is an OpenCV function. You are supposed to have OpenCV installed.

[ym19920319]

I have opencv installed ,but now,there still several errors :
processing catkin package: 'guidance'
-- ==> add_subdirectory(Guidance-SDK-ROS)
CMake Error at /opt/ros/indigo/share/cv_bridge/cmake/cv_bridgeConfig.cmake:106 (message):
Project 'cv_bridge' specifies '/usr/include/opencv' as an include dir,
which is not found. It does neither exist as an absolute directory nor in
'/opt/ros/indigo//usr/include/opencv'. Ask the maintainer 'Vincent Rabaud
vincent.rabaud@gmail.com' to fix it.
Call Stack (most recent call first):
/opt/ros/indigo/share/catkin/cmake/catkinConfig.cmake:75 (find_package)
Guidance-SDK-ROS/CMakeLists.txt:4 (find_package)
-- Configuring incomplete, errors occurred!
See also "/home/exbot/catkin_ws/build/CMakeFiles/CMakeOutput.log".
See also "/home/exbot/catkin_ws/build/CMakeFiles/CMakeError.log".
Invoking "cmake" failed
I know it is a problem of path and I tried to cope with it ,but failed to it ,could you help me with it? thank you1

[lanyusea]

Hi @ym19920319

CMake Error at /opt/ros/indigo/share/cv_bridge/cmake/cv_bridgeConfig.cmake:106 (message):
Project 'cv_bridge' specifies '/usr/include/opencv' as an include dir,
which is not found. It does neither exist as an absolute directory nor in
'/opt/ros/indigo//usr/include/opencv'.

It seems that you have installed opencv into other location, therefore the cv_bridge cannot find the opencv header file.

There are many similar issues here: https://www.google.com.hk/search?q=It+does+neither+exist+as+an+absolute+directory+nor+in+%27%2Fopt%2Fros%2Findigo%2F%2Fusr%2Finclude%2Fopencv%27.+Ask+the+maintainer+%27Vincent+Rabaud&oq=It+does+neither+exist+as+an+absolute+directory+nor+in+%27%2Fopt%2Fros%2Findigo%2F%2Fusr%2Finclude%2Fopencv%27.+Ask+the+maintainer+%27Vincent+Rabaud&aqs=chrome..69i57j69i64&sourceid=chrome&ie=UTF-8

[ym19920319]

thank you !Because cv bridge only support for opencv 2.4.8,then I updated the cv bridge and succeeded .but I continued to do that:
cd ~/catkin_ws
catkin_make
rosrun guidance guidanceNode
rosrun guidance guidanceNodeTest

The third and fourth step appeared followed errors:
exbot@ubuntu:~/catkin_ws$ rosrun guidance guidanceNode
[rospack] Error: package 'guidance' not found
Why!

[lanyusea]

did you source this workspace in your bashrc?

[ym19920319]

I have sourced and succeed !Thank you!

[ym19920319]

Did you operate guidance-sdk-ros on vware10?I can't link it to usb of vware.

[lanyusea]

@ym19920319
well, I suggest that you should use a real Linux

[ym19920319]

Ok! I will try to do it .thank you!

[jimcha21]

Hey @TreLosOyk I've uploaded a ROS node for UART connection, here SenseLabTUC/guidance_uart.

It has the same topics morphology as this Guidance-SDK-ROS USB based repository, excepting the image raw data. No image data can be transfered by the UART connection, because of the small bandwidth.