4. Problem including libusb doesn't recognize the functions or variables of libusb

Problem including libusb doesn't recognize the functions or variables of libusb


  • I am tried to compile a file with the header a his source file, both of them have the line to include the libusb library on GNU/Linux OS with this line

    #include <libusb-1.0/libusb.h>

    cyusb.c

    /*******************************************************************************\
 * Program Name		:	libcyusb.c					*
 * Author		:	V. Radhakrishnan ( rk@atr-labs.com )		*
 * License		:	GPL Ver 2.0					*
 * Copyright		:	Cypress Semiconductors Inc. / ATR-LABS		*
 * Date written		:	March 12, 2012					*
 * Modification Notes	:							*
 * 										*
 * This program is the main library for all cyusb applications to use.		*
 * This is a thin wrapper around libusb						*
\*******************************************************************************/

#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>

#include <libusb-1.0/libusb.h>
#include "cyusb.h"

/* Maximum length of a string read from the Configuration file (/etc/cyusb.conf) for the library. */
#define MAX_CFG_LINE_LENGTH                     (120)

static struct cydev cydev[MAXDEVICES];
static int nid;		/* Number of Interesting Devices	*/

struct VPD {
    unsigned short	vid;
    unsigned short	pid;
    char		desc[MAX_STR_LEN];
};

static struct VPD vpd[MAX_ID_PAIRS];

static int maxdevices;
static int numdev;
static libusb_device **list;
static unsigned int checksum = 0;

char pidfile[256];
char logfile[256];
int logfd;
int pidfd;

static int isempty(char *buf, int L)
{
    int flag = 1;
    int i;

    if ( L == 0 ) return 1;

    for (i = 0; i < L; ++i ) {
        if ( (buf[i] == ' ') || ( buf[i] == '\t' ) )
         continue;
        else {
         flag = 0;
         break;
        }
    }
    return flag;
}

static void parse_configfile(void)
{
    FILE *inp;
    char buf[MAX_CFG_LINE_LENGTH];
    char *cp1, *cp2, *cp3;
    int i;

    inp = fopen("/etc/cyusb.conf", "r");
        if (inp == NULL)
            return;

    memset(buf,'\0',MAX_CFG_LINE_LENGTH);
    while ( fgets(buf,MAX_CFG_LINE_LENGTH,inp) ) {
        if ( buf[0] == '#' ) 			/* Any line starting with a # is a comment 	*/
           continue;
        if ( buf[0] == '\n' )
           continue;
        if ( isempty(buf,strlen(buf)) )		/* Any blank line is also ignored		*/
           continue;

        cp1 = strtok(buf," =\t\n");
        if ( !strcmp(cp1,"LogFile") ) {
           cp2 = strtok(NULL," \t\n");
           strcpy(logfile,cp2);
        }
        else if ( !strcmp(cp1,"PIDFile") ) {
            cp2 = strtok(NULL," \t\n");
            strcpy(pidfile,cp2);
        }
        else if ( !strcmp(cp1,"<VPD>") ) {
            while ( fgets(buf,MAX_CFG_LINE_LENGTH,inp) ) {
                if ( buf[0] == '#' ) 		/* Any line starting with a # is a comment 	*/
                   continue;
                if ( buf[0] == '\n' )
                   continue;
                if ( isempty(buf,strlen(buf)) )	/* Any blank line is also ignored		*/
                   continue;
                if ( maxdevices == (MAX_ID_PAIRS - 1) )
                   continue;
                cp1 = strtok(buf," \t\n");
                if ( !strcmp(cp1,"</VPD>") )
                   break;
                cp2 = strtok(NULL, " \t");
                cp3 = strtok(NULL, " \t\n");

                vpd[maxdevices].vid = strtol(cp1,NULL,16);
                vpd[maxdevices].pid = strtol(cp2,NULL,16);
                strncpy(vpd[maxdevices].desc,cp3,MAX_STR_LEN);
                                vpd[maxdevices].desc[MAX_STR_LEN - 1] = '\0';   /* Make sure of NULL-termination. */

                ++maxdevices;
            }
        }
        else {
             printf("Error in config file /etc/cyusb.conf: %s \n",buf);
             exit(1);
        }
    }

    fclose(inp);
}

static int device_is_of_interest(cyusb_device *d)
{
    int i;
    int found = 0;
    struct libusb_device_descriptor desc;
    int vid;
    int pid;

    libusb_get_device_descriptor(d, &desc);
    vid = desc.idProduct;
    pid = desc.idProduct;

    for ( i = 0; i < maxdevices; ++i ) {
        if ( (vpd[i].vid == desc.idVendor) && (vpd[i].pid == desc.idProduct) ) {
            found = 1;
        break;
        }
    }
    return found;
}

unsigned short cyusb_getvendor(cyusb_handle *h)
{
    struct libusb_device_descriptor d;
    cyusb_get_device_descriptor(h, &d);
    return d.idVendor;
}

unsigned short cyusb_getproduct(cyusb_handle *h)
{
    struct libusb_device_descriptor d;
    cyusb_get_device_descriptor(h, &d);
    return d.idProduct;
}

static int renumerate(void)
{
    cyusb_device *dev = NULL;
    cyusb_handle *handle = NULL;
    int found = 0;
    int i;
    int r;

    numdev = libusb_get_device_list(NULL, &list);
    if ( numdev < 0 ) {
       printf("Library: Error in enumerating devices...\n");
       return -4;
    }

    nid = 0;

    for ( i = 0; i < numdev; ++i ) {
        cyusb_device *tdev = list[i];
        if ( device_is_of_interest(tdev) ) {
           cydev[nid].dev = tdev;
           r = libusb_open(tdev, &cydev[nid].handle);
           if ( r ) {
              printf("Error in opening device\n");
              return -5;
           }
           else handle = cydev[nid].handle;
           cydev[nid].vid     = cyusb_getvendor(handle);
           cydev[nid].pid     = cyusb_getproduct(handle);
           cydev[nid].is_open = 1;
           cydev[nid].busnum  = cyusb_get_busnumber(handle);
           cydev[nid].devaddr = cyusb_get_devaddr(handle);
           ++nid;
        }
    }
    return nid;
}

int cyusb_open(unsigned short vid, unsigned short pid)
{
    int r;
    cyusb_handle *h = NULL;

    r = libusb_init(NULL);
    if (r) {
          printf("Error in initializing libusb library...\n");
          return -1;
    }
    h = libusb_open_device_with_vid_pid(NULL, vid, pid);
    if ( !h ) {
       printf("Device not found\n");
       return -2;
    }
    cydev[0].dev     = libusb_get_device(h);
    cydev[0].handle  = h;
    cydev[nid].vid     = cyusb_getvendor(h);
    cydev[nid].pid     = cyusb_getproduct(h);
    cydev[nid].is_open = 1;
    cydev[nid].busnum  = cyusb_get_busnumber(h);
    cydev[nid].devaddr = cyusb_get_devaddr(h);
    nid = 1;
    return 1;
}

void cyusb_error(int err)
{	if ( err == -1 )
       fprintf(stderr, "Input/output error\n");
    else if ( err == -2 )
        fprintf(stderr, "Invalid parameter\n");
    else if ( err == -3 )
        fprintf(stderr, "Access denied (insufficient permissions)\n");
    else if ( err == -4 )
        fprintf(stderr, "No such device. Disconnected...?\n");
    else if ( err == -5 )
        fprintf(stderr, "Entity not found\n");
    else if ( err == -6 )
        fprintf(stderr, "Resource busy\n");
    else if ( err == -7 )
        fprintf(stderr, "Operation timed out\n");
    else if ( err == -8 )
        fprintf(stderr, "Overflow\n");
    else if ( err == -9 )
        fprintf(stderr, "Pipe error\n");
    else if ( err == -10 )
        fprintf(stderr, "System call interrupted, ( due to signal ? )\n");
    else if ( err == -11 )
        fprintf(stderr, "Insufficient memory\n");
    else if ( err == 12 )
        fprintf(stderr, "Operation not supported/implemented\n");
    else fprintf(stderr, "Unknown internal error\n");
}


cyusb_handle * cyusb_gethandle(int index)
{
    return cydev[index].handle;
}

void cyusb_close(void)
{
    int i;

    for ( i = 0; i < nid; ++i ) {
        libusb_close(cydev[i].handle);
    }
    libusb_free_device_list(list, 1);
    libusb_exit(NULL);
}

int cyusb_get_busnumber(cyusb_handle *h)
{
    cyusb_device *tdev = libusb_get_device(h);
    return libusb_get_bus_number( tdev );
}

int cyusb_get_devaddr(cyusb_handle *h)
{
    cyusb_device *tdev = libusb_get_device(h);
    return libusb_get_device_address( tdev );
}

int cyusb_get_max_packet_size(cyusb_handle *h, unsigned char endpoint)
{
    cyusb_device *tdev = libusb_get_device(h);
    return ( libusb_get_max_packet_size(tdev, endpoint) );
}

int cyusb_get_max_iso_packet_size(cyusb_handle *h, unsigned char endpoint)
{
    cyusb_device *tdev = libusb_get_device(h);
    return ( libusb_get_max_iso_packet_size(tdev, endpoint) );
}

int cyusb_get_configuration(cyusb_handle *h, int *config)
{
    return ( libusb_get_configuration(h, config) );
}

int cyusb_set_configuration(cyusb_handle *h, int config)
{
    return ( libusb_set_configuration(h, config) );
}

int cyusb_claim_interface(cyusb_handle *h, int interface)
{
    return ( libusb_claim_interface(h, interface) );
}

int cyusb_release_interface(cyusb_handle *h, int interface)
{
    return ( libusb_release_interface(h, interface) );
}

int cyusb_set_interface_alt_setting(cyusb_handle *h, int interface, int altsetting)
{
    return ( libusb_set_interface_alt_setting(h, interface, altsetting) );
}

int cyusb_clear_halt(cyusb_handle *h, unsigned char endpoint)
{
    return ( libusb_clear_halt(h, endpoint) );
}

int cyusb_reset_device(cyusb_handle *h)
{
    return ( libusb_reset_device(h) );
}

int cyusb_kernel_driver_active(cyusb_handle *h, int interface)
{
    return ( libusb_kernel_driver_active(h, interface) );
}

int cyusb_detach_kernel_driver(cyusb_handle *h, int interface)
{
    return ( libusb_detach_kernel_driver(h, interface) );
}

int cyusb_attach_kernel_driver(cyusb_handle *h, int interface)
{
    return ( libusb_attach_kernel_driver(h, interface) );
}

int cyusb_get_device_descriptor(cyusb_handle *h, struct libusb_device_descriptor *desc)
{
    cyusb_device *tdev = libusb_get_device(h);
    return ( libusb_get_device_descriptor(tdev, desc ) );
}

int cyusb_get_active_config_descriptor(cyusb_handle *h, struct libusb_config_descriptor **config)
{
    cyusb_device *tdev = libusb_get_device(h);
    return ( libusb_get_active_config_descriptor(tdev, config) );
}

int cyusb_get_config_descriptor(cyusb_handle *h, unsigned char config_index, struct libusb_config_descriptor **config)
{
    cyusb_device *tdev = libusb_get_device(h);
    return ( libusb_get_config_descriptor(tdev, config_index, config) );
}

int cyusb_get_config_descriptor_by_value(cyusb_handle *h, unsigned char bConfigurationValue,
                                    struct usb_config_descriptor **config)
{
    cyusb_device *tdev = libusb_get_device(h);
    return ( libusb_get_config_descriptor_by_value(tdev, bConfigurationValue,
                    (struct libusb_config_descriptor **)config) );
}

void cyusb_free_config_descriptor(struct libusb_config_descriptor *config)
{
    libusb_free_config_descriptor( (libusb_config_descriptor *)config );
}

int cyusb_get_string_descriptor_ascii(cyusb_handle *h, unsigned char index, unsigned char *data,  int length)
{
    cyusb_device *tdev = libusb_get_device(h);
    return ( libusb_get_string_descriptor_ascii(h, index, data, length) );
}

int cyusb_get_descriptor(cyusb_handle *h, unsigned char desc_type, unsigned char desc_index, unsigned char *data,
        int len)
{
    return ( libusb_get_descriptor(h, desc_type, desc_index, data, len) );
}

int cyusb_get_string_descriptor(cyusb_handle *h, unsigned char desc_index, unsigned short langid,
                                unsigned char *data, int len)
{
    return ( libusb_get_string_descriptor(h, desc_index, langid, data, len) );
}

int cyusb_control_transfer(cyusb_handle *h, unsigned char bmRequestType, unsigned char bRequest,
        unsigned short wValue, unsigned short wIndex, unsigned char *data, unsigned short wLength,
        unsigned int timeout)
{
    return ( libusb_control_transfer(h, bmRequestType, bRequest, wValue, wIndex, data, wLength, timeout) );
}

int cyusb_control_read (cyusb_handle *h, unsigned char bmRequestType, unsigned char bRequest,
        unsigned short wValue, unsigned short wIndex, unsigned char *data, unsigned short wLength,
        unsigned int timeout)
{
    /* Set the direction bit to indicate a read transfer. */
    return ( libusb_control_transfer(h, bmRequestType | 0x80, bRequest, wValue, wIndex, data, wLength, timeout) );
}

int cyusb_control_write (cyusb_handle *h, unsigned char bmRequestType, unsigned char bRequest,
        unsigned short wValue, unsigned short wIndex, unsigned char *data, unsigned short wLength,
        unsigned int timeout)
{
    /* Clear the direction bit to indicate a write transfer. */
    return ( libusb_control_transfer(h, bmRequestType & 0x7F, bRequest, wValue, wIndex, data, wLength, timeout) );
}

int cyusb_bulk_transfer(cyusb_handle *h, unsigned char endpoint, unsigned char *data, int length,
                int *transferred, int timeout)
{
    return ( libusb_bulk_transfer(h, endpoint, data, length, transferred, timeout) );
}

int cyusb_interrupt_transfer(cyusb_handle *h, unsigned char endpoint, unsigned char *data, int length,
                int *transferred, unsigned int timeout)
{
    return ( libusb_interrupt_transfer(h, endpoint, data, length, transferred, timeout) );
}


static void control_transfer(cyusb_handle *h, unsigned int address, unsigned char *dbuf, int len)
{
    int j;
    int r;
    int b;
    unsigned int *pint;
    int index;

    int balance = len;
    pint = (unsigned int *)dbuf;

    index = 0;
    while ( balance > 0 ) {
          if ( balance > 4096 )
         b = 4096;
          else b = balance;
          r = cyusb_control_transfer(h, 0x40, 0xA0, ( address & 0x0000ffff ), address >> 16, &dbuf[index], b, 1000);
          if ( r != b ) {
           printf("Error in control_transfer\n");
          }
          address += b ;
          balance -= b;
          index += b;
    }
    for ( j = 0; j < len/4; ++j )
        checksum += pint[j];
}

    I am getting this error

    /home/pasante/Escritorio/simple-player/src/cyusb.c:372: error: ‘libusb_config_descriptor’ undeclared (first use in this function)
    libusb_free_config_descriptor( (libusb_config_descriptor *)config );
    ^~~~~~~~~~~~~~~~~~~~~~~~
    libusb_config_descriptor is not declared

    if i eliminate the function where that variable appears, any variable or function of libusb are recognized

    0
  • Qt Champions 2016

    Hi
    Can you show your .pro file ?

    Its unclear how you LINK to the actual lib.

    http://doc.qt.io/qtcreator/creator-project-qmake-libraries.html

    Once your problem is solved please do:
    Use the Topic Tools button to mark as Solved and
    Upvote the answer(s) that helped you to solve the issue
    postimage.org can be used for screenshots.
    Get on the inside track at https://www.qtworldsummit.com/

    0 1 Replies

  • Looks like this question is nothing to do with Qt. But still where is the structure libusb_config_descriptor defined ? This structure may not be available in your library. Please check it.

    Dheerendra
    @Community Service
    Certified Qt Specialist
    http://www.pthinks.com

    3

  • @mrjj said in Problem including libusb doesn't recognize the functions or variables of libusb:

    Hi
    Can you show your .pro file ?

    Its unclear how you LINK to the actual lib.

    http://doc.qt.io/qtcreator/creator-project-qmake-libraries.html

    .pro

    #
# VLC-Qt Simple Player
# Copyright (C) 2015 Tadej Novak <tadej@tano.si>
#

TARGET      = simple-player
TEMPLATE    = app
CONFIG 	   += c++11

QT         += widgets

SOURCES    += main.cpp \
    SimplePlayer.cpp \
    EqualizerDialog.cpp \
    connection.cpp \
    cyusb.c

HEADERS    += SimplePlayer.h \
    EqualizerDialog.h \
    connection.h \
    cyusb.h

FORMS      += SimplePlayer.ui \
    EqualizerDialog.ui

LIBS       += -lVLCQtCore -lVLCQtWidgets 


# Edit below for custom library location
LIBS       += -L/Users/tadej/workspace/tanoprojects/install/vlc-qt/lib -lVLCQtCore -lVLCQtWidgets 
INCLUDEPATH += /Users/tadej/workspace/tanoprojects/install/vlc-qt/include 

RESOURCES += \
    icons.qrc

    I am doing some search about added the path to the .pro file, here it's where libusb are located in my computer, but i am not sure how to added to the .pro i was only able to find the header here /usr/include/libusb-1.0/libusb.h and not the lib

    pasante@pasante-MN-50:~$ locate libusb
/lib/firmware/carl9170fw/extra/libusb-zeropacket.diff
/lib/x86_64-linux-gnu/libusb-1.0.so.0
/lib/x86_64-linux-gnu/libusb-1.0.so.0.1.0
/opt/Qt5.8.0/5.8/Src/coin/provisioning/qtci-linux-RHEL-6.6-x86_64/libusb.sh
/opt/Qt5.8.0/5.8/Src/coin/provisioning/qtci-linux-Ubuntu-14.04-x86_64/libusb.sh
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/build/linux/unbundle/libusb.gyp
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/BUILD.gn
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/OWNERS
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/README.chromium
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/assign-endpoints-checks.patch
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/composite-hid-close.patch
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/darwin-sigfpe.patch
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/libusb.gyp
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/linux-udev.patch
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/open-fd.patch
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/upstream-tick147.patch
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/windows-build.patch
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/AUTHORS
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/COPYING
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/config.h
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/msvc
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb/core.c
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb/descriptor.c
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb/hotplug.c
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb/hotplug.h
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb/interrupt.c
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb/interrupt.h
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb/io.c
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb/libusb.h
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb/libusbi.h
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb/os
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb/strerror.c
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb/sync.c
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb/version.h
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb/version_nano.h
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb/os/DEPS
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb/os/darwin_usb.c
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb/os/darwin_usb.h
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb/os/linux_netlink.c
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb/os/linux_udev.cc
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb/os/linux_usbfs.c
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb/os/linux_usbfs.h
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb/os/openbsd_usb.c
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb/os/poll_posix.c
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb/os/poll_posix.h
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb/os/poll_windows.c
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb/os/poll_windows.h
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb/os/threads_posix.c
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb/os/threads_posix.h
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb/os/threads_windows.c
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb/os/threads_windows.h
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb/os/wince_usb.c
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb/os/wince_usb.h
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb/os/windows_common.h
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb/os/windows_usb.c
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb/os/windows_usb.h
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/msvc/config.h
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/msvc/errno.h
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/msvc/inttypes.h
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/msvc/missing.c
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/msvc/missing.h
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/msvc/stdint.h
/opt/Qt5.8.0/Docs/Qt-5.8/qtwebengine/qtwebengine-3rdparty-libusbx.html
/usr/include/libusb-1.0
/usr/include/libusb-1.0/libusb.h
/usr/lib/x86_64-linux-gnu/libusb-1.0.a
/usr/lib/x86_64-linux-gnu/libusb-1.0.so
/usr/lib/x86_64-linux-gnu/libusbmuxd.so.4
/usr/lib/x86_64-linux-gnu/libusbmuxd.so.4.0.0
/usr/lib/x86_64-linux-gnu/pkgconfig/libusb-1.0.pc
/usr/share/doc/libusb-1.0-0
/usr/share/doc/libusb-1.0-0-dbg
/usr/share/doc/libusb-1.0-0-dev
/usr/share/doc/libusb-1.0-doc
/usr/share/doc/libusbmuxd4
/usr/share/doc/libusb-1.0-0/README
/usr/share/doc/libusb-1.0-0/changelog.Debian.gz
/usr/share/doc/libusb-1.0-0/copyright
/usr/share/doc/libusb-1.0-0-dbg/changelog.Debian.gz
/usr/share/doc/libusb-1.0-0-dbg/copyright
/usr/share/doc/libusb-1.0-0-dev/README
/usr/share/doc/libusb-1.0-0-dev/changelog.Debian.gz
/usr/share/doc/libusb-1.0-0-dev/copyright
/usr/share/doc/libusb-1.0-doc/PORTING
/usr/share/doc/libusb-1.0-doc/README
/usr/share/doc/libusb-1.0-doc/changelog.Debian.gz
/usr/share/doc/libusb-1.0-doc/copyright
/usr/share/doc/libusb-1.0-doc/html
/usr/share/doc/libusb-1.0-doc/html/annotated.html
/usr/share/doc/libusb-1.0-doc/html/api.html
/usr/share/doc/libusb-1.0-doc/html/arrowdown.png
/usr/share/doc/libusb-1.0-doc/html/arrowright.png
/usr/share/doc/libusb-1.0-doc/html/bc_s.png
/usr/share/doc/libusb-1.0-doc/html/bdwn.png
/usr/share/doc/libusb-1.0-doc/html/caveats.html
/usr/share/doc/libusb-1.0-doc/html/classes.html
/usr/share/doc/libusb-1.0-doc/html/closed.png
/usr/share/doc/libusb-1.0-doc/html/contexts.html
/usr/share/doc/libusb-1.0-doc/html/dir_6560186179ae86ab3fbed805e7cb86e4.html
/usr/share/doc/libusb-1.0-doc/html/doc.png
/usr/share/doc/libusb-1.0-doc/html/doxygen.css
/usr/share/doc/libusb-1.0-doc/html/doxygen.png
/usr/share/doc/libusb-1.0-doc/html/files.html
/usr/share/doc/libusb-1.0-doc/html/folderclosed.png
/usr/share/doc/libusb-1.0-doc/html/folderopen.png
/usr/share/doc/libusb-1.0-doc/html/functions.html
/usr/share/doc/libusb-1.0-doc/html/functions_vars.html
/usr/share/doc/libusb-1.0-doc/html/group__asyncio.html
/usr/share/doc/libusb-1.0-doc/html/group__desc.html
/usr/share/doc/libusb-1.0-doc/html/group__dev.html
/usr/share/doc/libusb-1.0-doc/html/group__hotplug.html
/usr/share/doc/libusb-1.0-doc/html/group__lib.html
/usr/share/doc/libusb-1.0-doc/html/group__misc.html
/usr/share/doc/libusb-1.0-doc/html/group__poll.html
/usr/share/doc/libusb-1.0-doc/html/group__syncio.html
/usr/share/doc/libusb-1.0-doc/html/hotplug.html
/usr/share/doc/libusb-1.0-doc/html/index.html
/usr/share/doc/libusb-1.0-doc/html/io.html
/usr/share/doc/libusb-1.0-doc/html/jquery.js
/usr/share/doc/libusb-1.0-doc/html/libusb_8h_source.html
/usr/share/doc/libusb-1.0-doc/html/modules.html
/usr/share/doc/libusb-1.0-doc/html/mtasync.html
/usr/share/doc/libusb-1.0-doc/html/nav_f.png
/usr/share/doc/libusb-1.0-doc/html/nav_g.png
/usr/share/doc/libusb-1.0-doc/html/nav_h.png
/usr/share/doc/libusb-1.0-doc/html/open.png
/usr/share/doc/libusb-1.0-doc/html/packetoverflow.html
/usr/share/doc/libusb-1.0-doc/html/pages.html
/usr/share/doc/libusb-1.0-doc/html/splitbar.png
/usr/share/doc/libusb-1.0-doc/html/structlibusb__bos__descriptor.html
/usr/share/doc/libusb-1.0-doc/html/structlibusb__bos__dev__capability__descriptor.html
/usr/share/doc/libusb-1.0-doc/html/structlibusb__config__descriptor.html
/usr/share/doc/libusb-1.0-doc/html/structlibusb__container__id__descriptor.html
/usr/share/doc/libusb-1.0-doc/html/structlibusb__control__setup.html
/usr/share/doc/libusb-1.0-doc/html/structlibusb__device__descriptor.html
/usr/share/doc/libusb-1.0-doc/html/structlibusb__endpoint__descriptor.html
/usr/share/doc/libusb-1.0-doc/html/structlibusb__interface.html
/usr/share/doc/libusb-1.0-doc/html/structlibusb__interface__descriptor.html
/usr/share/doc/libusb-1.0-doc/html/structlibusb__iso__packet__descriptor.html
/usr/share/doc/libusb-1.0-doc/html/structlibusb__pollfd.html
/usr/share/doc/libusb-1.0-doc/html/structlibusb__ss__endpoint__companion__descriptor.html
/usr/share/doc/libusb-1.0-doc/html/structlibusb__ss__usb__device__capability__descriptor.html
/usr/share/doc/libusb-1.0-doc/html/structlibusb__transfer.html
/usr/share/doc/libusb-1.0-doc/html/structlibusb__usb__2__0__extension__descriptor.html
/usr/share/doc/libusb-1.0-doc/html/structlibusb__version.html
/usr/share/doc/libusb-1.0-doc/html/sync_off.png
/usr/share/doc/libusb-1.0-doc/html/sync_on.png
/usr/share/doc/libusb-1.0-doc/html/tab_a.png
/usr/share/doc/libusb-1.0-doc/html/tab_b.png
/usr/share/doc/libusb-1.0-doc/html/tab_h.png
/usr/share/doc/libusb-1.0-doc/html/tab_s.png
/usr/share/doc/libusb-1.0-doc/html/tabs.css
/usr/share/doc/libusb-1.0-doc/html/version_8h_source.html
/usr/share/doc/libusb-1.0-doc/html/version__nano_8h_source.html
/usr/share/doc/libusbmuxd4/changelog.Debian.gz
/usr/share/doc/libusbmuxd4/copyright
/usr/share/doc-base/libusb-1.0-doc
/usr/share/lintian/overrides/libusbmuxd4
/var/cache/apt/archives/libusb-1.0-0-dbg_2%3a1.0.20-1_amd64.deb
/var/cache/apt/archives/libusb-1.0-0-dev_2%3a1.0.20-1_amd64.deb
/var/cache/apt/archives/libusb-1.0-doc_2%3a1.0.20-1_all.deb
/var/lib/dpkg/info/libusb-1.0-0-dbg:amd64.list
/var/lib/dpkg/info/libusb-1.0-0-dbg:amd64.md5sums
/var/lib/dpkg/info/libusb-1.0-0-dev:amd64.list
/var/lib/dpkg/info/libusb-1.0-0-dev:amd64.md5sums
/var/lib/dpkg/info/libusb-1.0-0:amd64.list
/var/lib/dpkg/info/libusb-1.0-0:amd64.md5sums
/var/lib/dpkg/info/libusb-1.0-0:amd64.shlibs
/var/lib/dpkg/info/libusb-1.0-0:amd64.symbols
/var/lib/dpkg/info/libusb-1.0-0:amd64.triggers
/var/lib/dpkg/info/libusb-1.0-doc.list
/var/lib/dpkg/info/libusb-1.0-doc.md5sums
/var/lib/dpkg/info/libusbmuxd4:amd64.list
/var/lib/dpkg/info/libusbmuxd4:amd64.md5sums
/var/lib/dpkg/info/libusbmuxd4:amd64.shlibs
/var/lib/dpkg/info/libusbmuxd4:amd64.symbols
/var/lib/dpkg/info/libusbmuxd4:amd64.triggers

    Can help my to fill this

    LIBS += -L[LOCATION_OF_THE_libusb_LIBRARY_ON_THE_SYSTEM]
    INCLUDEPATH += [LOCATION_OF_libusb_HEADER_FILE]
    DEPENDPATH += [LOCATION_OF_libusb_HEADER_FILE]
    PRE_TARGETDEPS += [LOCATION_OF_libusb.a_ARCHIVE_FILE_OF_THE_LIBRARY]

    I couldn't find the lib any clue?

    this is what i have

    LIBS += -L
    INCLUDEPATH += /usr/include/libusb-1.0/
    DEPENDPATH += /usr/include/libusb-1.0/libusb.h
    PRE_TARGETDEPS += /usr/lib/x86_64-linux-gnu/

    0

  • /lib/x86_64-linux-gnu/libusb-1.0.so.0 is present under the directory /lib/x86_64-linux-gnu/

    LIBS += -L/lib/x86_64-linux-gnu -llibusb
    INCLUDE PATH +=/usr/include/libusb-1.0/

    Dheerendra
    @Community Service
    Certified Qt Specialist
    http://www.pthinks.com

    3
  • Qt Champions 2016

    Did you do
    sudo apt-get install libusb-1.0-0-dev

    or was it already installed ?
    mine is in
    /lib/i386-linux-gnu/libusb-1.0.so.0
    (Mint 64)

    Once your problem is solved please do:
    Use the Topic Tools button to mark as Solved and
    Upvote the answer(s) that helped you to solve the issue
    postimage.org can be used for screenshots.
    Get on the inside track at https://www.qtworldsummit.com/

    0

  • I am making easy this way a simple program to display the information from USB.

    I made the .pro getting information from the command in console locate libusb

    pasante@pasante-MN-50:~$ locate libusb
/lib/firmware/carl9170fw/extra/libusb-zeropacket.diff
/lib/x86_64-linux-gnu/libusb-1.0.so.0
/lib/x86_64-linux-gnu/libusb-1.0.so.0.1.0
/opt/Qt5.8.0/5.8/Src/coin/provisioning/qtci-linux-RHEL-6.6-x86_64/libusb.sh
/opt/Qt5.8.0/5.8/Src/coin/provisioning/qtci-linux-Ubuntu-14.04-x86_64/libusb.sh
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/build/linux/unbundle/libusb.gyp
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/BUILD.gn
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/OWNERS
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/README.chromium
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/assign-endpoints-checks.patch
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/composite-hid-close.patch
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/darwin-sigfpe.patch
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/libusb.gyp
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/linux-udev.patch
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/open-fd.patch
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/upstream-tick147.patch
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/windows-build.patch
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/AUTHORS
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/COPYING
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/config.h
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/msvc
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb/core.c
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb/descriptor.c
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb/hotplug.c
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb/hotplug.h
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb/interrupt.c
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb/interrupt.h
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb/io.c
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb/libusb.h
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb/libusbi.h
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb/os
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb/strerror.c
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb/sync.c
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb/version.h
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb/version_nano.h
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb/os/DEPS
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb/os/darwin_usb.c
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb/os/darwin_usb.h
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb/os/linux_netlink.c
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb/os/linux_udev.cc
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb/os/linux_usbfs.c
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb/os/linux_usbfs.h
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb/os/openbsd_usb.c
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb/os/poll_posix.c
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb/os/poll_posix.h
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb/os/poll_windows.c
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb/os/poll_windows.h
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb/os/threads_posix.c
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb/os/threads_posix.h
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb/os/threads_windows.c
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb/os/threads_windows.h
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb/os/wince_usb.c
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb/os/wince_usb.h
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb/os/windows_common.h
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb/os/windows_usb.c
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/libusb/os/windows_usb.h
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/msvc/config.h
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/msvc/errno.h
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/msvc/inttypes.h
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/msvc/missing.c
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/msvc/missing.h
/opt/Qt5.8.0/5.8/Src/qtwebengine/src/3rdparty/chromium/third_party/libusb/src/msvc/stdint.h
/opt/Qt5.8.0/Docs/Qt-5.8/qtwebengine/qtwebengine-3rdparty-libusbx.html
/usr/include/libusb-1.0
/usr/include/libusb-1.0/libusb.h
/usr/lib/x86_64-linux-gnu/libusb-1.0.a
/usr/lib/x86_64-linux-gnu/libusb-1.0.so
/usr/lib/x86_64-linux-gnu/libusbmuxd.so.4
/usr/lib/x86_64-linux-gnu/libusbmuxd.so.4.0.0
/usr/lib/x86_64-linux-gnu/pkgconfig/libusb-1.0.pc
/usr/share/doc/libusb-1.0-0
/usr/share/doc/libusb-1.0-0-dbg
/usr/share/doc/libusb-1.0-0-dev
/usr/share/doc/libusb-1.0-doc
/usr/share/doc/libusbmuxd4
/usr/share/doc/libusb-1.0-0/README
/usr/share/doc/libusb-1.0-0/changelog.Debian.gz
/usr/share/doc/libusb-1.0-0/copyright
/usr/share/doc/libusb-1.0-0-dbg/changelog.Debian.gz
/usr/share/doc/libusb-1.0-0-dbg/copyright
/usr/share/doc/libusb-1.0-0-dev/README
/usr/share/doc/libusb-1.0-0-dev/changelog.Debian.gz
/usr/share/doc/libusb-1.0-0-dev/copyright
/usr/share/doc/libusb-1.0-doc/PORTING
/usr/share/doc/libusb-1.0-doc/README
/usr/share/doc/libusb-1.0-doc/changelog.Debian.gz
/usr/share/doc/libusb-1.0-doc/copyright
/usr/share/doc/libusb-1.0-doc/html
/usr/share/doc/libusb-1.0-doc/html/annotated.html
/usr/share/doc/libusb-1.0-doc/html/api.html
/usr/share/doc/libusb-1.0-doc/html/arrowdown.png
/usr/share/doc/libusb-1.0-doc/html/arrowright.png
/usr/share/doc/libusb-1.0-doc/html/bc_s.png
/usr/share/doc/libusb-1.0-doc/html/bdwn.png
/usr/share/doc/libusb-1.0-doc/html/caveats.html
/usr/share/doc/libusb-1.0-doc/html/classes.html
/usr/share/doc/libusb-1.0-doc/html/closed.png
/usr/share/doc/libusb-1.0-doc/html/contexts.html
/usr/share/doc/libusb-1.0-doc/html/dir_6560186179ae86ab3fbed805e7cb86e4.html
/usr/share/doc/libusb-1.0-doc/html/doc.png
/usr/share/doc/libusb-1.0-doc/html/doxygen.css
/usr/share/doc/libusb-1.0-doc/html/doxygen.png
/usr/share/doc/libusb-1.0-doc/html/files.html
/usr/share/doc/libusb-1.0-doc/html/folderclosed.png
/usr/share/doc/libusb-1.0-doc/html/folderopen.png
/usr/share/doc/libusb-1.0-doc/html/functions.html
/usr/share/doc/libusb-1.0-doc/html/functions_vars.html
/usr/share/doc/libusb-1.0-doc/html/group__asyncio.html
/usr/share/doc/libusb-1.0-doc/html/group__desc.html
/usr/share/doc/libusb-1.0-doc/html/group__dev.html
/usr/share/doc/libusb-1.0-doc/html/group__hotplug.html
/usr/share/doc/libusb-1.0-doc/html/group__lib.html
/usr/share/doc/libusb-1.0-doc/html/group__misc.html
/usr/share/doc/libusb-1.0-doc/html/group__poll.html
/usr/share/doc/libusb-1.0-doc/html/group__syncio.html
/usr/share/doc/libusb-1.0-doc/html/hotplug.html
/usr/share/doc/libusb-1.0-doc/html/index.html
/usr/share/doc/libusb-1.0-doc/html/io.html
/usr/share/doc/libusb-1.0-doc/html/jquery.js
/usr/share/doc/libusb-1.0-doc/html/libusb_8h_source.html
/usr/share/doc/libusb-1.0-doc/html/modules.html
/usr/share/doc/libusb-1.0-doc/html/mtasync.html
/usr/share/doc/libusb-1.0-doc/html/nav_f.png
/usr/share/doc/libusb-1.0-doc/html/nav_g.png
/usr/share/doc/libusb-1.0-doc/html/nav_h.png
/usr/share/doc/libusb-1.0-doc/html/open.png
/usr/share/doc/libusb-1.0-doc/html/packetoverflow.html
/usr/share/doc/libusb-1.0-doc/html/pages.html
/usr/share/doc/libusb-1.0-doc/html/splitbar.png
/usr/share/doc/libusb-1.0-doc/html/structlibusb__bos__descriptor.html
/usr/share/doc/libusb-1.0-doc/html/structlibusb__bos__dev__capability__descriptor.html
/usr/share/doc/libusb-1.0-doc/html/structlibusb__config__descriptor.html
/usr/share/doc/libusb-1.0-doc/html/structlibusb__container__id__descriptor.html
/usr/share/doc/libusb-1.0-doc/html/structlibusb__control__setup.html
/usr/share/doc/libusb-1.0-doc/html/structlibusb__device__descriptor.html
/usr/share/doc/libusb-1.0-doc/html/structlibusb__endpoint__descriptor.html
/usr/share/doc/libusb-1.0-doc/html/structlibusb__interface.html
/usr/share/doc/libusb-1.0-doc/html/structlibusb__interface__descriptor.html
/usr/share/doc/libusb-1.0-doc/html/structlibusb__iso__packet__descriptor.html
/usr/share/doc/libusb-1.0-doc/html/structlibusb__pollfd.html
/usr/share/doc/libusb-1.0-doc/html/structlibusb__ss__endpoint__companion__descriptor.html
/usr/share/doc/libusb-1.0-doc/html/structlibusb__ss__usb__device__capability__descriptor.html
/usr/share/doc/libusb-1.0-doc/html/structlibusb__transfer.html
/usr/share/doc/libusb-1.0-doc/html/structlibusb__usb__2__0__extension__descriptor.html
/usr/share/doc/libusb-1.0-doc/html/structlibusb__version.html
/usr/share/doc/libusb-1.0-doc/html/sync_off.png
/usr/share/doc/libusb-1.0-doc/html/sync_on.png
/usr/share/doc/libusb-1.0-doc/html/tab_a.png
/usr/share/doc/libusb-1.0-doc/html/tab_b.png
/usr/share/doc/libusb-1.0-doc/html/tab_h.png
/usr/share/doc/libusb-1.0-doc/html/tab_s.png
/usr/share/doc/libusb-1.0-doc/html/tabs.css
/usr/share/doc/libusb-1.0-doc/html/version_8h_source.html
/usr/share/doc/libusb-1.0-doc/html/version__nano_8h_source.html
/usr/share/doc/libusbmuxd4/changelog.Debian.gz
/usr/share/doc/libusbmuxd4/copyright
/usr/share/doc-base/libusb-1.0-doc
/usr/share/lintian/overrides/libusbmuxd4
/var/cache/apt/archives/libusb-1.0-0-dbg_2%3a1.0.20-1_amd64.deb
/var/cache/apt/archives/libusb-1.0-0-dev_2%3a1.0.20-1_amd64.deb
/var/cache/apt/archives/libusb-1.0-doc_2%3a1.0.20-1_all.deb
/var/lib/dpkg/info/libusb-1.0-0-dbg:amd64.list
/var/lib/dpkg/info/libusb-1.0-0-dbg:amd64.md5sums
/var/lib/dpkg/info/libusb-1.0-0-dev:amd64.list
/var/lib/dpkg/info/libusb-1.0-0-dev:amd64.md5sums
/var/lib/dpkg/info/libusb-1.0-0:amd64.list
/var/lib/dpkg/info/libusb-1.0-0:amd64.md5sums
/var/lib/dpkg/info/libusb-1.0-0:amd64.shlibs
/var/lib/dpkg/info/libusb-1.0-0:amd64.symbols
/var/lib/dpkg/info/libusb-1.0-0:amd64.triggers
/var/lib/dpkg/info/libusb-1.0-doc.list
/var/lib/dpkg/info/libusb-1.0-doc.md5sums
/var/lib/dpkg/info/libusbmuxd4:amd64.list
/var/lib/dpkg/info/libusbmuxd4:amd64.md5sums
/var/lib/dpkg/info/libusbmuxd4:amd64.shlibs
/var/lib/dpkg/info/libusbmuxd4:amd64.symbols
/var/lib/dpkg/info/libusbmuxd4:amd64.triggers

    the .pro file look like this

    #-------------------------------------------------
#
# Project created by QtCreator 2017-01-31T11:51:20
#
#-------------------------------------------------

QT       += core gui

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

TARGET = usb_test
TEMPLATE = app

# The following define makes your compiler emit warnings if you use
# any feature of Qt which as been marked as deprecated (the exact warnings
# depend on your compiler). Please consult the documentation of the
# deprecated API in order to know how to port your code away from it.
DEFINES += QT_DEPRECATED_WARNINGS

# You can also make your code fail to compile if you use deprecated APIs.
# In order to do so, uncomment the following line.
# You can also select to disable deprecated APIs only up to a certain version of Qt.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0


SOURCES += main.cpp\
        mainwindow.cpp

HEADERS  += mainwindow.h

FORMS    += mainwindow.ui

LIBS += -L/usr/lib/x86_64-linux-gnu/
INCLUDEPATH += /usr/include/libusb-1.0/
DEPENDPATH += /usr/include/libusb-1.0/
PRE_TARGETDEPS += /usr/lib/x86_64-linux-gnu/

    The mainwindows cpp is just a button who launch then function of the library libusb to get the devices, the tried to put it in a listwidget, i haven't move element to the listwidget because only in the function to get devices it doesn't compile

    #include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QStringListModel>
#include <QStringList>
#include <QString>
#include <libusb-1.0/libusb.h>

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);

}

MainWindow::~MainWindow()
{
    delete ui;
}

void MainWindow::on_pushButton_clicked()
{
    libusb_device **list=NULL; //pointer to the pointer of the devices
    libusb_context *ctx=NULL;  //the context

    int notification = libusb_get_device_list(ctx,&list); //get a list of device fill dev[] struct
    
    QString casa="hello";
    ui->listWidget->addItem(casa);
}

    when compile i get the error
    /home/pasante/Escritorio/build-usb_test-Desktop_Qt_5_8_0_GCC_64bit-Debug/mainwindow.o:-1: error:In function MainWindow::on_pushButton_clicked()': /home/pasante/Escritorio/usb_test/mainwindow.cpp:29: reference tolibusb_get_device_list' without define

    Its the same problem in the program before, this one i more simple, i don't know why is not deference the function of libusb

    0

  • I found the solution, in the .pro you only need this to link libusb

    LIBS +=  -lusb-1.0

    Here a simple program with tow list widgets one for look the id product an other for the vendor in a decimal way

    #include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QStringListModel>
#include <QStringList>
#include <QString>
#include <libusb-1.0/libusb.h>
#include <iostream>

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);

}

MainWindow::~MainWindow()
{
    delete ui;
}

void MainWindow::on_pushButton_clicked()
{
    libusb_device **list=NULL; //pointer to the pointer od the device
    libusb_context *ctx=NULL;  //the context

    int r; //for return values
    ssize_t number_of_devices; //holding number of devices in list
    r = libusb_init(&ctx); //initialize a library session
    if(r < 0)
    {
        QString one_error="Error library inicialization";
        ui->listWidget->addItem(one_error);

    }

    libusb_set_debug(ctx, 3); //set verbosity level to 3, as suggested in the documentation

    number_of_devices = libusb_get_device_list(ctx,&list); //get a list of device fil dev[] struct

    if(number_of_devices < 0)
    {
        QString two_error="Any device found";
        ui->listWidget->addItem(two_error);
    }

    unsigned int i=0;  //Iteration the number of drivers founded

    libusb_device_descriptor descriptor; //Store the decriptions of the USB devices there were founded

    for (i=0;i<number_of_devices;i++)
    {
        int status = libusb_get_device_descriptor(list[i],&descriptor);

        if(status < 0)
        {
            QString three_error="Error on getting description";
            ui->listWidget->addItem(three_error);
        }

        QString idProduct= QString::number((int)descriptor.idProduct);
        QString idVendor= QString::number((int)descriptor.idVendor);

        ui->listWidget->addItem(idProduct);
        ui->listWidget_2->addItem(idVendor);
    }

}

    You will ablel to see the different usb devices of your computer. I hope some one will find this and solve his problems with libusb qt and linux. It's necessary documentation about this point for other users, i lost a lot of time in this.

    Cheers guys, any more doubts i will write it in the forum.

    1
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