>Could you please also post your code? What if you comment out
>the usb_set_configuration() call?
OK guys, here is my relevant code:
bool MLibUsb_Comm::Open(t_ActualValue *p_actual_value)
{
# ifdef OS_WIN32
const struct usb_version *version = usb_get_version();
if(version) {
MTrace_AddToLevel5("DLL version:\t%d.%d.%d.%d\r\n",
version->dll.major, version->dll.minor,
version->dll.micro, version->dll.nano);
MTrace_AddToLevel5("Driver version:\t%d.%d.%d.%d\r\n\r\n",
version->driver.major, version->driver.minor,
version->driver.micro, version->driver.nano);
}
# endif
usb_set_debug(4);
usb_init(); /* Initialize the library */
usb_find_busses(); /* Find all busses */
usb_find_devices(); /* Find all connected devices */
if(!(m_comm_hdls.m_p_usb_dev = open_dev())) { // see function below
MErrTrace_Add("error: device not found!. %s", usb_strerror());
return false;
}
if(usb_set_configuration(m_comm_hdls.m_p_usb_dev, 1) < 0) {
MErrTrace_Add("error: setting config 1 failed. %s", usb_strerror());
usb_close(m_comm_hdls.m_p_usb_dev);
return false;
}
if(usb_claim_interface(m_comm_hdls.m_p_usb_dev, 0) < 0) {
MErrTrace_Add("error: claiming interface 0 failed. %s", usb_strerror());
usb_set_configuration(m_comm_hdls.m_p_usb_dev, 0);
usb_close(m_comm_hdls.m_p_usb_dev);
return false;
}
// Some other initialisation
.
.
.
// Start reading in thread... looks like:
while(1){
int ret = usb_interrupt_read(p_comm_hdls->m_p_usb_dev,
ENDPOINT_ADDRESS_FOR_READ,
(char *) p_buf,
USB_FIFO_PACKET_SIZE, READ_TIMEOUT);
// Do something with data
}
// Open() done
return true;
}
static usb_dev_handle *open_dev(void)
{
struct usb_bus *bus;
struct usb_device *dev;
for(bus = usb_get_busses(); bus; bus = bus->next) {
for(dev = bus->devices; dev; dev = dev->next) {
if( dev->descriptor.idVendor == USB_VENDOR_ID
&& dev->descriptor.idProduct == USB_PRODUCT_ID) {
for (int i = 0; i < dev->descriptor.bNumConfigurations; i++)
print_configuration(&dev->config[i]);
return usb_open(dev);
}
}
}
return NULL;
}
>Yes DebugView will have much more information. You need to
>use the debug version of libusb-win32.
>
http://sourceforge.net/projects/libusb-win32/files/libusb-win32-releases/1.2.5.0/>libusb-win32-bin-debug-1.2.5.0.zip
Xiaofan, is DebugView some application that i have to install with the libusb-win32-devel-filter-debug-1.2.5.0.exe?
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