如何在Linux上使用libusb进行设备通信

? Linux ??? libusb ??????,????????:

1. ?? libusb ?:

   ??,??????????? libusb ??????,????????(? apt?yum ? pacman)???????,??? Debian ????,??????????:

   sudo apt-get update
   sudo apt-get install libusb-1.0-0-dev
   

2. ????:

   ?????? usb_example.c ???,???????:

   #include
   #include 
   #include 
   
   int main() {
       libusb_context *ctx = NULL;
       libusb_device **devs = NULL;
       ssize_t cnt;
       int r, i;
   
       r = libusb_init(&ctx);
       if (r < 0) {
           fprintf(stderr, "Failed to initialize libusb\n");
           exit(1);
       }
   
       cnt = libusb_get_device_list(ctx, &devs);
       if (cnt < 0) {
           fprintf(stderr, "Failed to get device list\n");
           libusb_exit(ctx);
           exit(1);
       }
   
       printf("Found %ld devices\n", cnt);
       for (i = 0; i < cnt; i++) {
           struct libusb_device_descriptor desc;
           r = libusb_get_device_descriptor(devs[i], &desc);
           if (r < 0) {
               fprintf(stderr, "Failed to get device descriptor\n");
               continue;
           }
   
           printf("Device %d: ID x:x\n", i, desc.idVendor, desc.idProduct);
       }
   
       libusb_free_device_list(devs, 1);
       libusb_exit(ctx);
   
       return 0;
   }
   

   ???????????????? USB ?????????? ID?

3. ????:

   ??????????:

   gcc -o usb_example usb_example.c -lusb-1.0
   

4. ????:

   ??????????:

   ./usb_example
   

   ?????????????? USB ?????????? ID?

5. ?????:

   ????????,?????????????? ID???,????? libusb ?????(? libusb_open()?libusb_claim_interface()?libusb_bulk_transfer() ?)????????????????????????

??:??? libusb ???????,????????????????????????? plugdev ???????:

sudo usermod -a -G plugdev $USER

??,??????????????