18 years ago: Bought a USB graphics tablet, spent the next three days REing the protocol and writing the driver (see wacom.c in older Linux kernels). This week: Again bought a USB graphics tablet, plugged it in, just works. Using Linux became boring. I think boring is good.
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Would you mind talking a bit on how you approached REing the protocol?
Put a lot of printk in the USB stack, moved around the stylus and looked at the USB traffic. Learning how the USB stack works was the hardest part. Nowadays the Linux Kernel has infrastructure for logging USB traffic. You can simply look at it in something like Wireshark.
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Succinct, but informative. Thanks!
Thanks. Twitter will use this to make your timeline better. UndoUndo
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