Re: [Libusb-win32-devel] runtime error as memory could not be read when using libusb..win32

[Stephan M. <Ste...@ia...>]

http://www.google.com/search?hl=de&q=%22Loaded+*+no+matching+symbolic+information+found%22&lr=


> 
> i've written pgm in vc++,windows 2000...
> 
> my pgm code is
> #include <stdio.h>
> #include <string.h>
> #include <usb.h>
> 
> void readwrite();
> struct usb_endpoint_descriptor *endpoint;
> 
> int verbose = 0;
> usb_dev_handle *udev;
> char buf[40]="MEASUrement:IMMed:TYpe PK2PK?";
> char buf1[25];
> int size,i;
> 
> void print_endpoint(struct usb_endpoint_descriptor *endpoint)
> {
>   printf("bEndpointAddress: %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)
> {
> 
> 
>   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)
> {
>     for (i = 0; i < interface->num_altsetting; i++)
>     print_altsetting(&interface->altsetting[i]);
> }
> 
> void print_configuration(struct usb_config_descriptor *config)
> {
>   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)
> {
>   //char description[256];
>   //char string[256];
>   //int ret;
> 
> 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 main()//int argc, char *argv[])
> {
>   struct usb_bus *bus;
>  // if (argc > 1 && !strcmp(argv[1], "-v"))
>   verbose = 1;
> 
>   usb_init();
>   usb_find_busses();
>   usb_find_devices();
> 
>   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);
>     }
>   }
> readwrite();
>   return 0;
> }
> void readwrite()
> {
> size=strlen(buf);
> usb_bulk_write(udev,endpoint->bEndpointAddress,buf,size,100);
> usb_bulk_read(udev,endpoint->bEndpointAddress,buf1,size,100);
> 
> for(i=0;i<size;i++)
> {
>    printf("%d",buf1[i]);
> }
> 
> }
> i'm getting error as 
> C:\WINNT\system32\ntdll.dll', no matching symbolic information found.
> Loaded 'C:\WINNT\system32\KERNEL32.DLL', no matching symbolic 
> information found.
> 
> please give me a solution...
> thanks n advance...
> 
> 
> 
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