Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
I am trying to write to a PS3 controller using the following line (dev has been set properly).
dev.ctrl_transfer(0x40, CTRL_LOOPBACK_WRITE, 0, 0, msg)
I get an error that CTRL_LOOPBACK_WRITE is undefined. So, where is it defined? Or can I just get the value of it?
Thanks
I guess you found this control transfer example on the pyusb tutorial at http://pyusb.sourceforge.net/docs/1.0/tutorial.html. However, this is a rather hypothetical example, as the text explains: “In this example, it is assumed that our device implements two custom control requests that act as a loopback pipe”. So this is not a standard control request, and probably not a request supported by your PS3. In that case it would be up to the PS3 controller’s USB stack to define what the numeric value of CTRL_LOOPBACK_WRITE should be.
You can find an overview of the standard requests at http://www.beyondlogic.org/usbnutshell/usb6.shtml#StandardRequests, in addition there are class-specific standard requests.