Hi all, I've written a C/C++ program for controlling a robot with a USB joystick under linux. For this I'm using the joydev module. Some of our robots are quite large and fast, and a safety concern is with the joystick being unplugged, then the robot should stop. As it stands, when the joystick is disconnected the "read" call blocks as though there is no new data. I could open the joystick port as non-blocking, but then "read" just returns like there's no new data. What I really need to be able to do is determine whether the joystick is still attached, and I figure somewhere along the chain (kernel->usb->input->joystick) someone knows whether it's there, and my best guess would be the linux usb driver. So anyway, I'm essentially looking for a point in the right direction as to how I might test to see if the joystick is connected from my C/C++ program?
If it helps I'm using Debian Sarge with Linux kernel 2.4.26 on an i686 system. Thanks a lot, Tim -- UTS CRICOS Provider Code: 00099F DISCLAIMER: This email message and any accompanying attachments may contain confidential information. If you are not the intended recipient, do not read, use, disseminate, distribute or copy this message or attachments. If you have received this message in error, please notify the sender immediately and delete this message. Any views expressed in this message are those of the individual sender, except where the sender expressly, and with authority, states them to be the views the University of Technology, Sydney. Before opening any attachments, please check them for viruses and defects. ------------------------------------------------------- This SF.Net email is sponsored by: InterSystems CACHE FREE OODBMS DOWNLOAD - A multidimensional database that combines robust object and relational technologies, making it a perfect match for Java, C++,COM, XML, ODBC and JDBC. www.intersystems.com/match8 _______________________________________________ [EMAIL PROTECTED] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-users
