[Lazarus] FW: Accessing USB HID from Lazarus programs?

[Peter Williams]

Hi Bo,

I found these 2 links with google. They discuss the unit libusb which seems to work (I have NOT tried it myself).
http://laurensdelangeelectronics.blogspot.com/2011/01/interfacing-with-usb-parallel-port.html
It appears from the article that it only works as a linux superuser. I suggest that it would probably work in Windows.
http://www.mail-archive.com/lazarus@lazarus.freepascal.org/msg08338.html

PEW
> To: lazarus at lists.lazarus.freepascal.org
> From: bo.berglund at gmail.com
> Date: Sun, 20 Mar 2011 10:04:28 -0500
> Subject: [Lazarus] Accessing USB HID from Lazarus programs?
> 
> I need to create a program using Lazarus/FPC to access a data
> collection device built using a PIC24F series microprocessor with
> built-in USB support. The firmware makes the PIC processor register as
> a Human Interface Device (HID) class USB device.
> 
> I understand that for the HID class one does not have to provide a USB
> driver, there is already a generic one on Windows and possibly also on
> Linux.
> And the HID interface is not limited to mice and such, for example the
> PicKit3 PIC programmer and ICE uses the HID driver and it can both
> program code into PIC:s and execute PIC code with breakpoints from
> within MPLAB (the PIC develeopment IDE).
> 
> My objective is to read the data from the data collection device using
> the USB interface and display the data on screen and also save to the
> PC disk.
> My FPC program should be able to run on Windows and preferably also on
> Linux.
> 
> But I can't find any good examples on how to access the USB HID
> device....
> 
> Can someone here please provide some help, links to code examples or
> similar?
> 
> Or is this OT for this list since it is basically a hardware access
> question?
> 
> 
> -- 
> Bo Berglund
> Developer in Sweden
> 
> 
> --
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