libusb finding devices problem

[airodrim]

Hi, I've just started to use USB devices and I founded that the libusb library could be the solution for my multiplataform programs. I used it in windows with good results but I am a bit newbie in Linux so I found some configuration problems. I use Fedora Core 5 and a Kernel version 2.6.15, I've compiled the libusb succesfully, now I want to run a java example which show the usb devices connected, I get the usb buses but no devices. When I type lsusb in the Terminal I get my devices info so Linux recognize them. I don't received any error and no info appear in system logs so I'm not sure what could it be the problem.

[airodrim]

It's me again, as I didn't find a solution to my problem I tried to execute the following test.

/*
* testlibusb.c
*
* Test suite program
*/

#include <stdio.h>
#include <string.h>
#include "usb.h"

#define snprintf printf

#define ID_PRODUCT 0x0200
#define ID_VENDOR 0x8235

#define CONFIGURATION 1
#define INTERFACE_ 0
#define ALTINTERFACE 0
#define TIMEOUT 5000

#define OUT_ENDPOINT 0x01
#define IN_ENDPOINT 0x82

// #define SET_ALTINTERFACE_ONCE

int verbose = 0;
unsigned char first = true;

void print_endpoint(struct usb_endpoint_descriptor *endpoint)
{
printf(" bEndpointAddress: &#37;02xh\n", endpoint->bEndpointAddress);
printf(" bmAttributes: %02xh\n", endpoint->bmAttributes);
printf(" wMaxPacketSize: %d\n", endpoint->wMaxPacketSize);
printf(" bInterval: %d\n", endpoint->bInterval);
printf(" bRefresh: %d\n", endpoint->bRefresh);
printf(" bSynchAddress: %d\n", endpoint->bSynchAddress);
}

void print_altsetting(struct usb_interface_descriptor *interface)
{
int i;

printf(" bInterfaceNumber: %d\n", interface->bInterfaceNumber);
printf(" bAlternateSetting: %d\n", interface->bAlternateSetting);
printf(" bNumEndpoints: %d\n", interface->bNumEndpoints);
printf(" bInterfaceClass: %d\n", interface->bInterfaceClass);
printf(" bInterfaceSubClass: %d\n", interface->bInterfaceSubClass);
printf(" bInterfaceProtocol: %d\n", interface->bInterfaceProtocol);
printf(" iInterface: %d\n", interface->iInterface);

for (i = 0; i < interface->bNumEndpoints; i++)
print_endpoint(&interface->endpoint[i]);
}

void print_interface(struct usb_interface *interface)
{
int i;

for (i = 0; i < interface->num_altsetting; i++)
print_altsetting(&interface->altsetting[i]);
}

void print_configuration(struct usb_config_descriptor *config)
{
int i;

printf(" wTotalLength: %d\n", config->wTotalLength);
printf(" bNumInterfaces: %d\n", config->bNumInterfaces);
printf(" bConfigurationValue: %d\n", config->bConfigurationValue);
printf(" iConfiguration: %d\n", config->iConfiguration);
printf(" bmAttributes: %02xh\n", config->bmAttributes);
printf(" MaxPower: %d\n", config->MaxPower);

for (i = 0; i < config->bNumInterfaces; i++)
print_interface(&config->interface[i]);
}

int print_device(struct usb_device *dev, int level)
{
usb_dev_handle *udev;
char description[256];
char string[256];
int ret, i;

udev = usb_open(dev);
if (udev) {
if (dev->descriptor.iManufacturer) {
ret = usb_get_string_simple(udev, dev->descriptor.iManufacturer, string, sizeof(string));
if (ret > 0)
snprintf(description, sizeof(description), "%s - ", string);
else
snprintf(description, sizeof(description), "%04X - ",
dev->descriptor.idVendor);
} else
snprintf(description, sizeof(description), "%04X - ",
dev->descriptor.idVendor);

if (dev->descriptor.iProduct) {
ret = usb_get_string_simple(udev, dev->descriptor.iProduct, string, sizeof(string));
if (ret > 0)
snprintf(description + strlen(description), sizeof(description) -
strlen(description), "%s", string);
else
snprintf(description + strlen(description), sizeof(description) -
strlen(description), "%04X", dev->descriptor.idProduct);
} else
snprintf(description + strlen(description), sizeof(description) -
strlen(description), "%04X", dev->descriptor.idProduct);

} else
snprintf(description, sizeof(description), "%04X - %04X",
dev->descriptor.idVendor, dev->descriptor.idProduct);

printf("%.*sDev #%d: %s\n", level * 2, " ", dev->devnum,
description);

if (udev && verbose) {
if (dev->descriptor.iSerialNumber) {
ret = usb_get_string_simple(udev, dev->descriptor.iSerialNumber, string, sizeof(string));
if (ret > 0)
printf("%.*s - Serial Number: %s\n", level * 2,
" ", string);
}
}

if (udev)
usb_close(udev);

if (verbose) {
if (!dev->config) {
printf(" Couldn't retrieve descriptors\n");
return 0;
}

for (i = 0; i < dev->descriptor.bNumConfigurations; i++)
print_configuration(&dev->config[i]);
} else {
for (i = 0; i < dev->num_children; i++)
print_device(dev->children[i], level + 1);
}

return 0;
}

int read(struct usb_dev_handle *handle)
{
if (usb_claim_interface(handle, INTERFACE_) < 0) {
printf("error on usb_claim_interface: %s\n", usb_strerror());
return -1;
}
printf("usb_claim_interface successful\n");
#ifdef SET_ALTINTERFACE_ONCE
if (first) {
first = false;
#endif
if (usb_set_altinterface(handle, ALTINTERFACE) < 0){
printf("usb_set_altinterface failed: %s\n", usb_strerror());
}
#ifdef SET_ALTINTERFACE_ONCE
}
#endif

int size = 512, res;
char *data = (char *) malloc(size*sizeof(char));
res = usb_bulk_read(handle, IN_ENDPOINT, data, size, TIMEOUT);
if (res < 0){
printf("usb_bulk_read failed: %s\n", usb_strerror());
}
printf("usb_bulk_read: %d bytes read: ", res);
for (int i = 0; i < res; ++i) {
printf("%3x ", data[i]);
}
printf("\n");

usb_release_interface(handle, INTERFACE_);
free(data);
}

int write(struct usb_dev_handle *handle)
{
int size = 12;
char *data = (char *) malloc(size*sizeof(char));
data[0] = 0x33;
data[1] = 0x5B;
data[2] = 0x02;
data[3] = 0x01;
data[4] = 0x00;
data[5] = 0x05;
data[6] = 0x01;
data[7] = 0x03;
data[8] = 0x07;
data[9] = 0x0F;
data[10] = 0x7F;
data[11] = 0x1F;
// data = {0x33, 0x5B, 0x02, 0x01, 0x00, 0x05, 0x01, 0x03, 0x07, 0x0F, 0x7F, 0x1F};

if (usb_claim_interface(handle, INTERFACE_) < 0) {
printf("error on usb_claim_interface: %s\n", usb_strerror());
return -1;
}
printf("usb_claim_interface successful\n");
#ifdef SET_ALTINTERFACE_ONCE
if (first) {
first = false;
#endif
if (usb_set_altinterface(handle, ALTINTERFACE) < 0){
printf("usb_set_altinterface failed: %s\n", usb_strerror());
}
#ifdef SET_ALTINTERFACE_ONCE
}
#endif

printf("usb_bulk_write: writing %d bytes: ", size);
for (int i = 0; i < size; ++i) {
printf("%3x ", data[i]);
}
printf("\n");

int res = usb_bulk_write(handle, OUT_ENDPOINT, data, size, TIMEOUT);
if (res < 0){
printf("usb_bulk_write failed: %s\n", usb_strerror());
return -1;
}

printf("usb_bulk_write: %d bytes written\n", res);

usb_release_interface(handle, INTERFACE_);
free(data);
}

int readWrite(struct usb_dev_handle *handle)
{

int size = 512;
char *data = (char *) malloc(size*sizeof(char));

printf("type a string...\n");
scanf("%s", data); // Get a string

if (usb_claim_interface(handle, INTERFACE_) < 0) {
printf("error on usb_claim_interface: %s\n", usb_strerror());
system("PAUSE");
return -1;
}
printf("usb_claim_interface successful\n");
#ifdef SET_ALTINTERFACE_ONCE
if (first) {
first = false;
#endif
if (usb_set_altinterface(handle, ALTINTERFACE) < 0){
printf("usb_set_altinterface failed: %s\n", usb_strerror());
}
#ifdef SET_ALTINTERFACE_ONCE
}
#endif

if (usb_bulk_write(handle, OUT_ENDPOINT, data, strlen(data), 3000) < 0){
printf("usb_bulk_write failed: %s\n", usb_strerror());
system("PAUSE");
return -1;
}

strcpy(data, "12345678901234567890");
printf("%s\n", "read data");
if (usb_bulk_read(handle, IN_ENDPOINT, data, size, 3000) < 0){
printf("usb_bulk_read failed: %s\n", usb_strerror());
}
printf("output %d, %s\n", size, data);
// for (int i = 0; i < size; ++i) {
// printf("%4x ", data[i]);
// }

usb_release_interface(handle, INTERFACE_);
free(data);
}

int readWriteLoop(struct usb_dev_handle *handle)
{
int NOF_LOOPS = 20;
int size = 12;
char *data = (char *) malloc(size*sizeof(char));
data[0] = 0x33;
data[1] = 0x5B;
data[2] = 0x02;
data[3] = 0x01;
data[4] = 0x00;
data[5] = 0x05;
data[6] = 0x01;
data[7] = 0x03;
data[8] = 0x07;
data[9] = 0x0F;
data[10] = 0x7F;
data[11] = 0x1F;
// data = {0x33, 0x5B, 0x02, 0x01, 0x00, 0x05, 0x01, 0x03, 0x07, 0x0F, 0x7F, 0x1F};

if (usb_claim_interface(handle, INTERFACE_) < 0) {
printf("error on usb_claim_interface: %s\n", usb_strerror());
return -1;
}
printf("usb_claim_interface successful\n");
#ifdef SET_ALTINTERFACE_ONCE
if (first) {
first = false;
#endif
if (usb_set_altinterface(handle, ALTINTERFACE) < 0){
printf("usb_set_altinterface failed: %s\n", usb_strerror());
}
#ifdef SET_ALTINTERFACE_ONCE
}
#endif

printf("usb_bulk_write: writing %d bytes: ", size);
for (int i = 0; i < size; ++i) {
printf("%3x ", data[i]);
}
printf("\n------------------------\n");

for (int var = 0; var < NOF_LOOPS; ++var) {

int res = usb_bulk_write(handle, OUT_ENDPOINT, data, size, TIMEOUT);
if (res < 0){
printf("usb_bulk_write failed: %s\n", usb_strerror());
return -1;
}

printf("usb_bulk_write: %d bytes written\n", res);

int size = 64;
char *data = (char *) malloc(size*sizeof(char));
res = usb_bulk_read(handle, IN_ENDPOINT, data, size, TIMEOUT);
if (res < 0){
printf("usb_bulk_read failed: %s\n", usb_strerror());
}
printf("usb_bulk_read: %d bytes read: ", res);
for (int i = 0; i < res; ++i) {
printf("%3x ", data[i]);
}
printf("\n");
}

usb_release_interface(handle, INTERFACE_);
free(data);
}

void logDevices()
{
struct usb_bus *bus;

printf("log devices...\n");
for (bus = usb_get_busses(); bus; bus = bus->next) {
if (bus->root_dev && !verbose)
print_device(bus->root_dev, 0);
else {
struct usb_device *dev;

for (dev = bus->devices; dev; dev = dev->next)
print_device(dev, 0);
}
}
}

int main(int argc, char *argv[])
{
struct usb_bus *bus;
struct usb_device *dev;
struct usb_dev_handle *handle;

bool run = true;

if (argc > 1 && !strcmp(argv[1], "-v"))
verbose = 1;

usb_set_debug(255);

printf("initialize libraray, find busses and devices\n");
usb_init();

usb_find_busses();
usb_find_devices();

if (verbose)
logDevices();

int size = 512;
char *data = (char *) malloc(size*sizeof(char));

printf("Search for device with idVendor 0x%x and idProduct 0x%x\n", ID_VENDOR, ID_PRODUCT);
for (bus = usb_get_busses(); bus; bus = bus->next) {
if (verbose)
printf("Found bus %s\n", bus->dirname);
for (dev = bus->devices; dev; dev = dev->next) {
if (verbose)
printf("Found device with idVendor 0x%x and idProduct 0x%x\n", dev->descriptor.idVendor, dev->descriptor.idProduct);
if ((dev->descriptor.idProduct == ID_PRODUCT) && (dev->descriptor.idVendor == ID_VENDOR)){
printf("Device found -> open\n");
handle = usb_open(dev);
if (!handle) {
printf("invalid handle: %s\n", usb_strerror());
system("PAUSE");
return -1;
}
printf("Set configuration\n");
if (usb_set_configuration(handle, CONFIGURATION) < 0) {
printf("error on usb_set_configuration: %s\n", usb_strerror());
system("PAUSE");
return -1;
}

printf("Set altinterface (must failed)\n");
#ifdef SET_ALTINTERFACE_ONCE
if (first) {
first = false;
#endif
if (usb_set_altinterface(handle, ALTINTERFACE) < 0){
printf("usb_set_altinterface failed: %s\n", usb_strerror());
}
#ifdef SET_ALTINTERFACE_ONCE
}
#endif

printf("w=write, r=read, x=exit, t=write+read, u=write+read(2), l=r/w loop, z=reset and open\n");

while (run) {
scanf("%s", data);

switch (data[0]) {
case 'w': // write
write(handle);
break;
case 'r': // read
read(handle);
break;
case 'x': // exit
run = false;
break;
case 't': // write + read
if (write(handle)) {
read(handle);
}
break;
case 'u': // write + read
readWrite(handle);
break;
case 'l': // loop
readWriteLoop(handle);
break;
case 's': // reset first flag (set_altinterface())
first = true;
break;
case 'z': // reset and open
usb_reset(handle);
handle = usb_open(dev);
break;
default:
break;
}
}
printf("\ndone\n");
}
}
}
free(data);
system("PAUSE");

return 1;
}

the rerult I obtein is this

usb_set_debug: Setting debugging level to 255 (on)
initialize libraray, find busses and devices
usb_os_init: Found USB VFS at /dev/bus/usb
usb_os_find_busses: Found 005
usb_os_find_busses: Found 004
usb_os_find_busses: Found 003
usb_os_find_busses: Found 002
usb_os_find_busses: Found 001
usb_os_find_busses: Skipping non bus directory devices
usb_os_find_devices: Found 004 on 005
skipped 1 class/vendor specific interface descriptors
usb_os_find_devices: Found 001 on 005
error obtaining child information: Inappropriate ioctl for device
usb_os_find_devices: Found 001 on 004
usb_os_find_devices: Found 001 on 003
usb_os_find_devices: Found 002 on 002
skipped 1 class/vendor specific interface descriptors
usb_os_find_devices: Found 001 on 002
error obtaining child information: Inappropriate ioctl for device
usb_os_find_devices: Found 001 on 001
log devices...
Search for device with idVendor 0x8235 and idProduct 0x200
Found bus 005
Found bus 004
Found bus 003
Found bus 002
Found bus 001
sh: PAUSE: command not found

it can be seen that the buses have been faound correctly, but there is an error in the devices finding. Any idea about it? could it be a kernel problem?