Objective Development Forums

The catch is to understand USB. I have begun to understand USB, but I have not finished yet. There are likely many device classes which you could get this going under, but the one you choose should probably be one that you will use for future projects. Then you will move more cleanly. 'Cleanly' here...

As I go along researching and learning about usb, I see that the logger with its HID keyboard interface is pretty limited. Still, the behavior could be very practical in terms of debugging an end-user product, whereby system tracing via debug statements could remain in code for some pilot projects, ...

Thanks very much Volker. I did use your usbconfig.h lines verbatim and it worked on my first try. The trick was getting some sense out of the HID keyboard code. Now that I understand it I see it is fairly simple. I'm printing one character per second now, which in itself has debug possibilities. I s...

This is an extension of the poorly titled thread http://forums.obdev.at/viewtopic.php?f=8&t=5724#p19549 Volker writes: Pls. note that Pin B2 is also the Int0 input pin. V-USB seems to use this interrupt. So if you connect the USB D+ data line to another pin, you have to figure out which interrup...

I'm interested in doing this too, but I haven't tried it yet. I've only just gotten the EasyLogger going. I'm not sure that there will be room in the timing to run the SPI port while performing the USB functionality. Still, maybe with some error correcting software it is possible. To me, this could ...

When you say that your crystal is 12 MHz on the dot, this may be true as it is written on the face of the crystal, but the capacitors that must be ganged to the crystal are specified by the manufacturer to reach that frequency on the dot, and even then true on the dot requires calibration of those c...