[libhid-discuss] problems with libhid and Oregon Scientific weather station WMRS203 (interrupt read)

[Jordi Puigsegur]

Where can I find information on the hidraw API and how to use it?

Thanks,
Jordi.

2009/7/31 Jordi Puigsegur <jordi.puigsegur at gmail.com>

> My plans are to add support for this type of weather station to an existing
> open source weather server, wview. The software runs on a variety of *nix
> operating systems and I would like to take an approach that is most standard
> and more likely to work on many *nix systems. The sofware also runs on SBC
> computers like NLSU, Sheeva plug, etc.
>
> Therefore my goal should be to take the aproach that will be more likely to
> work on any *nix system. So far I see that there are several options:
>
> * user space solution: libusb + libhid
>
> * hidraw driver API
> I suppose that most *nix have this driver loaded on the kernel. What I
> don't understand is what you suggest about the possibility of writting a
> backend for libhid using hidraw driver.
>
> * usbserial
> I don't know much about this option and I don't know if this specific
> device can run using this driver. Data is received through an interrupt but
> it seems that the reset command is transfered using control_data, not a
> write interrupt.
>
>
> Thanks,
> Jordi.
>
> 2009/7/30 Peter Stuge <peter at stuge.se>
>
> Jordi Puigsegur wrote:
>> > [   78.544058] usb 4-1: new low speed USB device using uhci_hcd and
>> address 3
>> > [   78.718640] usb 4-1: configuration #1 chosen from 1 choice
>> > [   78.735138] generic-usb 0003:0FDE:CA01.0002: hiddev96,hidraw1: USB
>> HID v1.10 Device [Universal Bridge] on usb-0000:00:1d.0-1/input0
>> >
>> > The last three lines appear when the weather station is plugged in
>> > the computer. Someone has pointed me out that in Ubuntu Jaunty the
>> > usbserial is built-in in the kernel, however I don't see it in
>> > dmesg. I suppose that is not the problem.
>>
>> If I were you I would just program the hidraw API directly to begin
>> with. Then maybe look into making a hidraw backend for libhid.
>>
>> Is portability across many operating systems important for you?
>>
>>
>> //Peter
>>
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>
>
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