On Sat, Dec 30, 2000 at 07:06:54PM -0500, rm wrote:
> i've done some hacking around with it, and it is indeed LM9832 based. the
I started looking at the Mustek Bearpaw 1200, which has a LM9831.
You know http://www.geocities.com/SiliconValley/Mouse/5403/ ?
If you have questions, you can try to ask the chip developers directly.
Maybe you can get the development software this way.
> usb format isn't described in the datasheet (it says it's in the dev
> software, but i couldn't find this), but it seems pretty simple from
> looking at the usb snoop output.
> the msg format is a bulkmsg send of 4 bytes in the shortest
> nWrite (0 or 1), register address, ???, # of bytes
> the 2nd byte is possibly the high byte of the number of bytes to be
That's right. This is the information for the 9831:
Byte 0: read (1) or write (0). Use incremental write/read: add 2.
Byte 1: register number
Byte 2: bytes to write/read MSB
Byte 3: bytes to write/read LSB
> if it's a read, you follow up by reading the blk endpoint, or if it's a
> write you just put the rest of it in the blkmsg.
> the scanner dependent stuff is in the .ini file that is distributed with
> the scanner. and the lm983x bits should be similar to the hp backend.
> anyway, just thought i'd let you all know the results in case anyone was
I'm interested. Do you want to write a backend? Otherwise I will start
to write one for the Mustek Bearpaw soon.
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