Bo Berglund wrote:
I posted this on the lazarus list but they suggested to send it to the
FPC list instead in order to possibly get better answers...
On Sun, 20 Mar 2011 10:04:28 -0500, Bo Berglund
<bo.bergl...@gmail.com> wrote:
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?
I'm accessing a Velleman K8055, which I think fits your description,
using libusb etc. I used Uwe Zimmerman's port of libusb
http://wiki.lazarus.freepascal.org/Hardware_Access#USB with very minor
changes, I used some C sources as examples but can't remember which-
possibly http://libk8055.sourceforge.net/
--
Mark Morgan Lloyd
markMLl .AT. telemetry.co .DOT. uk
[Opinions above are the author's, not those of his employers or colleagues]
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