Astan Chee <astan.c...@al.com.au> wrote: > >Im trying to write a program for my USB device and I'm thinking of using >python to do this. The USB device is of my own making and it is >activated when one of the two data pins of the USB is given about 5V (or >similar to whatever the power pin is getting). Now I'm confused to if >the software to activate this can actually be written and how do I do >it? Any examples? I've seen pyUSB but it doesn't give me control over >the hardware and how much power is going through the data pins.
Sorry, but you have NOT created a USB device, and I sincerely hope you do not try to plug it in to a real USB port. Despite the "serial" in the name, USB is much more than just a pair of wires, like RS-232. USB is a standard protocol-based bus, like Ethernet, and anything that is plugged into it must follow the protocol. You don't get a "voltage", you get a 480 MHz differential digital signal train. The wires are controlled by a USB host controller. You cannot override its behavior. You might be able to achieve your goal by using a parallel port, or by using a USB-to-serial port adapter, or by using one of the many simple and affordable USB experimenter's kits in the world. -- Tim Roberts, t...@probo.com Providenza & Boekelheide, Inc. -- http://mail.python.org/mailman/listinfo/python-list
