gmane.comp.lib.libhid.general

libhid gcc Werror patch

Vlatko Kosturjak — 2012-08-26T09:00:01

Hello,

This is patch for libhid so gcc doesn't stop on error if Werror is used:

Problem:
======
gcc -DHAVE_CONFIG_H -I. -I..   -DNDEBUG -I../include -I../hidparser -O2
-Wall -W -Werror -MT lshid.o -MD -MP -MF .deps/lshid.Tpo -c -o lshid.o
lshid.c
lshid.c: In function <E2><80><98>device_iterator<E2><80><99>:
lshid.c:32:87: error: parameter <E2><80><98>len<E2><80><99> set but not
used [-Werror=unused-but-set-parameter]
cc1: all warnings being treated as errors

Patch:
=====
--- lshid.c 2012-08-26 10:54:29.671277650 +0200
+++ lshid.c.mod 2012-08-26 10:54:18.007988938 +0200
< at >< at > -29,6 +29,9 < at >< at >

 struct usb_dev_handle;

+/* unused parameter - don't give error on that warning */
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wunused-parameter"
 bool device_iterator (struct usb_dev_handle const* usbdev, void* custom,
unsigned int len)
 {
   bool ret = false;
< at >< at > -36,10 +39,6 < at >< at >
   char current_dev_path[10];
   const struct usb_device *device = usb_device((struct usb_dev_handle
*)usbdev);

-  /* only

Compiling on Raspbian / Debian Wheezy

Florian Rittmeier — 2012-08-25T10:27:32

Hello,

I just wanted to share, that I had troubles compiling libhid 0.2.16 from 
the tarball on a RaspberryPi running Raspbian (Debian Wheezy).

The trouble was caused by a warning issued from compiling test/lshid.c 
during "make". The warning, which was treated as error, was caused by 
the parameter len which was detected as not beeing used. This seems to 
be known as there is some workaround in the device_iterator function in 
test/lshid.c which tries pretend that len is used.

I don`t know why this is a problem now and was not before. Perhaps the 
gcc is getting wiser. ;-) As a solution I added to following line right 
below the existing workaround:
if(len){}

The compiler accepted this, the warning does not get issued anymore and 
libhid was successfully build.

Regards,
Florian

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Re: libhid examples

Peter Stuge — 2012-08-07T01:29:44

For generic HID class device access I suggest looking at HIDAPI.


//Peter

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libhid examples

Andy Gair — 2012-08-06T18:51:22

I am looking for some examples on how to use "libhid" on windows 7 64bit. I
have the source compiled and running, looking for examples on how to
read/write a usb device, for testing I am trying to read my joystick.

 

Thanks

 

 

 

Andy Gair

Engineering Development Leader

2448 Destiny Way

Odessa

Florida 33556 USA

(727) 375-2520 x 105

 

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Need help installing on Debian 6 (Squeeze)

Michael Sandford — 2012-07-18T19:14:13

Hi Folks,

I am trying to install libhid on debian 6 and running into some problems.

1.  Dependency on swig and libhid-dev not well outlined, but solved.
2.  Installs to /usr/local/lib/python2.6/site-packages which isn't on 
pythonpath, but also solved.
3.  When trying to use library, get one of two errors:

sandford< at >debian-test:~/item_entry/src$ python
Python 2.6.6 (r266:84292, Dec 27 2010, 00:02:40)
[GCC 4.4.5] on linux2
Type "help", "copyright", "credits" or "license" for more information.
 >>> import hid
Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
ImportError: No module named hid
 >>>

So then I do this:
sandford< at >debian-test:~/item_entry/src$ export 
PYTHONPATH="$PYTHONPATH:/usr/local/lib/python2.6/site-packages/"
sandford< at >debian-test:~/item_entry/src$ python
Python 2.6.6 (r266:84292, Dec 27 2010, 00:02:40)
[GCC 4.4.5] on linux2
Type "help", "copyright", "credits" or "license" for more information.
 >>> import hid
Traceback (most recent call last):
   File "<stdin>", line 1

Re: Configuration issue on SuSE 11.4 - SOLUTION

Robert Warner — 2012-05-10T15:00:51

Hi All,

I am wrong, python was not needed and the method of 'disabling' python is non-obvious. It needs to be disabled by disabling 'swig', which is also non-obvious as --help does not list --disable-swig as an option.

./configure --disable-swig &&
su
make install

appears to works just fine.




________________________________
 From: Charles Lepple <clepple< at >ghz.cc>
To: Robert Warner <rwarner1< at >yahoo.com> 
Cc: "libhid-discuss< at >lists.alioth.debian.org" <libhid-discuss< at >lists.alioth.debian.org> 
Sent: Thursday, May 10, 2012 5:20 AM
Subject: Re: [libhid-discuss] Configuration issue on SuSE 11.3
 
On May 9, 2012, at 5:39 PM, Robert Warner wrote:


If you installed Python via RPM, is python-devel installed?

Or, as Peter suggested, you should be able to disable Python support by passing the appropriate flags to ./configure._______________________________________________
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Re: Configuration issue on SuSE 11.3

Robert Warner — 2012-05-10T14:41:25

Tried -disable-python, -disable-Python and -disable-PYTHON.  None worked.  Not sure why python is being used in this libhid, must be some sort of setup issue with the compile processing, no idea.  Looks like python is necessary for the build process to function correctly.  


Seems there has never been a definitive answer to the problem in the past either, looking through previous archives on the web.  Unless i missed the solution somewhere, which is possible.




________________________________
 From: Charles Lepple <clepple< at >ghz.cc>
To: Robert Warner <rwarner1< at >yahoo.com> 
Cc: "libhid-discuss< at >lists.alioth.debian.org" <libhid-discuss< at >lists.alioth.debian.org> 
Sent: Thursday, May 10, 2012 5:20 AM
Subject: Re: [libhid-discuss] Configuration issue on SuSE 11.3
 
On May 9, 2012, at 5:39 PM, Robert Warner wrote:


If you installed Python via RPM, is python-devel installed?

Or, as Peter suggested, you should be able to disable Python support by passing the appropriate flags to ./configure.___________________

Re: Configuration issue on SuSE 11.3

Charles Lepple — 2012-05-10T12:20:42


If you installed Python via RPM, is python-devel installed?

Or, as Peter suggested, you should be able to disable Python support by passing the appropriate flags to ./configure.
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http://libhid.alioth.debian.org/

Re: Configuration issue on SuSE 11.3

Peter Stuge — 2012-05-10T12:10:24

Unclear. Possibly you can disable python support in libhid as a
workaround. Look for suitable options in output from configure --help


//Peter

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Configuration issue on SuSE 11.3

Robert Warner — 2012-05-09T21:39:17

Hi,

How do I solve this issue?

Thanks in advance

checking for Python library path... /usr/lib64/python2.7/config/libpython2.7.so
checking for Python site-packages path... /usr/lib/python2.7/site-packages
checking python extra libraries...  -lpthread -ldl  -lutil
checking python extra linking flags... -Xlinker -export-dynamic
checking consistency of all components of python development environment... no
configure: error: 
  Could not link test program to Python. Maybe the main Python library has been
  installed in some non-standard library path. If so, pass it to configure,
  via the LDFLAGS environment variable.
  Example: ./configure LDFLAGS="-L/usr/non-standard-path/python/lib"
  ============================================================================
   ERROR!
   You probably have to install the development version of the Python package
   for your distribution.  The exact name of this package varies among them.
  =====================================================================

New library for LUA: lualibhid

Nelson Lombado — 2012-04-23T05:31:41

Hi,
I'm Nelson from Argentina. In these days I'm working around a library 
for access to libhid in native way from LUA (script language). In this 
moment I can write the lshid example in a LUA script. This library is 
part of a bigger proyect that is developing. I want to thank for share 
your work.
Best regards.
-
Nelson

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Re: USB libhid is writing to PIC but errors out reading from it.

Xiaofan Chen — 2011-11-16T11:49:56

Hmm, it seems you need to read the ABCs of USB before embarking
on this project.
http://www.usbmadesimple.co.uk/

As for your issue, you may want to check if your hardware and
firmware are correct or not. If possible, get a known-good hardware
(eg: the dev kits from Microchip) and then use the known-good
Microchip USB firmware framework to get familiar with the
stack first.

Re: USB libhid is writing to PIC but errors outreading from it.

Daniel Yount — 2011-11-15T15:19:36

Well I had tried out the bootloader and I get the same problem. It writes to it as it says Querying Chip.
but then it gets disconnected when trying to write from the chip. No difference in the problem of either program.

I was told that D+ was the write to chip line and D- was the Read from chip line. 
checked out the connections they seemed to be good, but will debug the lines later
have to go somewhere. Wondering what could be the deal on this chip and bootloader if it has a not
read option or should it be readable from the get go?




________________________________
From: Daniel Yount <factorf2< at >yahoo.com>
To: Xiaofan Chen <xiaofanc< at >gmail.com>
Cc: "libhid-discuss< at >lists.alioth.debian.org" <libhid-discuss< at >lists.alioth.debian.org>
Sent: Tuesday, November 15, 2011 8:44 AM
Subject: Re: [libhid-discuss] USB libhid is writing to PIC but errors out reading from it.


I was in the wrong on this one, I was using the Bootloader firmware form the Generic HID Bootloader.
I installed the accompanying HID Bootloader fo

Re: USB libhid is writing to PIC but errors outreading from it.

Daniel Yount — 2011-11-15T14:44:13

I was in the wrong on this one, I was using the Bootloader firmware form the Generic HID Bootloader.
I installed the accompanying HID Bootloader for the HIDBootloader and it all worked. or at least found
it will now test the uploading.

Thanks for your help.



________________________________
From: Daniel Yount <factorf2< at >yahoo.com>
To: Xiaofan Chen <xiaofanc< at >gmail.com>
Cc: "libhid-discuss< at >lists.alioth.debian.org" <libhid-discuss< at >lists.alioth.debian.org>
Sent: Tuesday, November 15, 2011 3:28 AM
Subject: Re: [libhid-discuss] USB libhid is writing to PIC but errors out reading from it.


I tried to get the Microchip HIDAPI Bootloader to find my 18f2455 chip 

and it would not. Just says disconnected at the bottom and give me no
options other than to kill the window.  The chip is in boot loader mode
i.e RB4 to ground and 10k to 5v usb + bus. It also shows up in the dmesg & lsusb list. 



________________________________
From: Daniel Yount <factorf2< at >yahoo.com>
To: Xiaofan Chen <xiaofanc< at >gmail.com>
Cc: "libhid-

Re: USB libhid is writing to PIC but errors outreading from it.

Daniel Yount — 2011-11-15T09:28:53

I tried to get the Microchip HIDAPI Bootloader to find my 18f2455 chip 

and it would not. Just says disconnected at the bottom and give me no
options other than to kill the window.  The chip is in boot loader mode
i.e RB4 to ground and 10k to 5v usb + bus. It also shows up in the dmesg & lsusb list. 



________________________________
From: Daniel Yount <factorf2< at >yahoo.com>
To: Xiaofan Chen <xiaofanc< at >gmail.com>
Cc: "libhid-discuss< at >lists.alioth.debian.org" <libhid-discuss< at >lists.alioth.debian.org>
Sent: Tuesday, November 15, 2011 2:08 AM
Subject: Re: [libhid-discuss] USB libhid is writing to PIC but errors out reading from it.


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Re: USB libhid is writing to PIC but errors outreading from it.

Daniel Yount — 2011-11-15T08:08:14

Ok could not compile Qt4.7 packages because of the  Debian 6.0 stable distro,
it seems compiling for the Microchip HIDAPI needed some newer libuuid functions
.so I changed my /etc/apt/sources.list distro setting for source downloads to testing instead of stable

deb-src http://ftp.us.debian.org/debian/ testing main contrib non-free

updated my apt repo :

apt-get update 


downloaded the source for util-linux which contains the libuuid

apt-get source util-linux

uncompressed the tarball ,recompiled and installed and qtcreator compiled fine..
http://qt.nokia.com/downloads


Next will be to see if the compiled bootloader actually works now. Thanks for the help.



________________________________
From: Xiaofan Chen <xiaofanc< at >gmail.com>
To: Daniel Yount <factorf2< at >yahoo.com>
Cc: "libhid-discuss< at >lists.alioth.debian.org" <libhid-discuss< at >lists.alioth.debian.org>
Sent: Monday, November 14, 2011 6:50 AM
Subject: Re: [libhid-discuss] USB libhid is writing to PIC but errors out reading from it.

On Mon, Nov 14, 2011

Re: USB libhid is writing to PIC but errors out reading from it.

Xiaofan Chen — 2011-11-14T12:50:43

If you download the latest Microchip USB stack, there is an HIDAPI
based cross-platform HID bootloader, you may want to try that one,
it works for me whereas mphidflash did not seem to work for me
(PIC18F87J50 USB PIM) last time I tried it.

USB libhid is writing to PIC but errors outreading from it.

Daniel Yount — 2011-11-14T10:46:12

Using Linux 3.x kernel and debian 6.0 stable distro.


USB flash program 1.3

http://code.google.com/p/mphidflash/


libhid 0.2.16


I have installed a Generic HID bootloader  and a basic p18F2455 circuit setup for reading and writing USB data.
20mhz crystal no LEDs one jumper for bootloader mode and a switch for reset., nothing special. 

When I plug it in and use the "dmesg" commandline program I get.

[19195.480407] usb 1-1.2: reset full speed USB device number 6 using ehci_hcd
[19238.616399] usb 1-1.4: new full speed USB device number 50 using ehci_hcd
[19238.711891] usb 1-1.4: New USB device found, idVendor=2233, idProduct=7001
[19238.711900] usb 1-1.4: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[19238.711907] usb 1-1.4: Product: Generic HID
[19238.711912] usb 1-1.4: Manufacturer: Test
[19238.714576] generic-usb 0003:2233:7001.000F: hiddev0,hidraw3: USB HID v1.11 Device [Test Generic HID] on usb-0000:00:13.5-1.4/input0


I type "lsusb -v" and get.


Bus 001 Device 050: ID 2233:7001 Radio

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Re: libhid with python: help appreciated

JamesPK — 2011-09-12T12:00:16

Thanks for your help. I'll try out your suggestions.

James

On 10/09/11 00:08, Charles Lepple wrote:


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Re: libhid with python: help appreciated

Charles Lepple — 2011-09-09T23:08:56


Again, with several endpoints possible, the destination of the message  
matters. (Windows apparently masks this difference when reading or  
writing to HID interfaces - it uses an interrupt endpoint if  
available, otherwise it issues a request on EP0.)

 From below, you only have "EP 1 IN" (plus the always-present EP0 IN/ 
OUT).

You probably want to use hid_set_output_report():

    http://libhid.alioth.debian.org/doc/hid__exchange_8c.html#7eb62286840ff33db4f68d58682bc4ad

And the path is going to look like { 0xFF000001, 0xFF000002 } (depth 2  
since there are two elements). See the comments in the example source  
code (or the archives of this list) for the derivation.

An alternate way of approaching this is to use one of the tools which  
converts USBSnoop (or similar) log files to sequences of direct libusb  
calls. Since your HID device is simply using the HID transport layer  
to pass 8-byte messages around, you might find it easier to just use  
libusb directly.

Look under "USB sniff log parser"