libusb compiler error, Help!!!
i test a .c file as follows:
#include <usb.h> #include <stdio.h> #define VENDOR_ID 0xE461 #define PRODUCT_ID 0x0007 usb_dev_handle *open_dev(void) { struct usb_bus *busses; struct usb_bus *bus; struct usb_device *dev; /* Find the device */ usb_init(); usb_find_busses(); usb_find_devices(); busses = usb_get_busses(); for (bus=busses; bus; bus=bus->next) { for (dev=bus->devices; dev; dev=dev->next) { if (dev->descriptor.idVendor == VENDOR_ID && dev->descriptor.idProduct == PRODUCT_ID) { return usb_open(dev); } } } printf("No device found\n"); return NULL; } int main(int argc, char **argv) { usb_dev_handle *d; int i; if (!(d = open_dev())) { printf("Error opening device\n"); return 1; } else { printf("VendorID = %04X; ProductID = %04X\n", d->device->descriptor.idVendor, d->device->descriptor.idProduct); } ... return (0); } when i compile it, i have a error: dereferencing pointer to incomplete type I don't know where is the mistake. |
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