Am 20.03.2011 23:53, schrieb Bo Berglund:
On Sun, 20 Mar 2011 19:47:28 +0000, Henry Vermaak
<henry.verm...@gmail.com> wrote:
On 20 March 2011 16:35, 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....
What you seen hidapi?
http://www.signal11.us/oss/hidapi/
You will probably have to translate the headers.
Thanks, interesting read. I looked over what I thought would be the
valid items and also tested the included enumeration test project,
which found my keyboard, mouse and Microchip PicKit3 programmer.
So far so good....
But it looks like this is C or C++ stuff.... :-(
Is there any FPC translation anywhere?
I don't believe I can translate the C stuff properly myself to FPC.
You can try to use h2pas, a tool which is distributed together with FPC.
It reads a C header file and outputs a Pascal file that contains the
bindings for the C library.
For the manual see here:
http://www.freepascal.org/tools/h2pas.var
For a little how to see here:
http://wiki.lazarus.freepascal.org/Creating_bindings_for_C_libraries
If it reports errors you should report back here as not every C
construct is understood by the tool.
Regards,
Sven
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