libusb在Linux下的使用教程

LibUSB????????,?????USB?????

1. ??LibUSB?:

?Debian?Ubuntu???,??????????LibUSB?:

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

?Fedora?Red Hat???,??????????LibUSB?:

sudo yum install libusb-devel

2. ???????LibUSB??:

??????list_devices.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;
}

3. ????:

????,?????list_devices.c?????,????????:

gcc -o list_devices list_devices.c -lusb-1.0

?????????????list_devices???????

4. ????:

?????,??root??,????USB???????????????:

sudo ./list_devices

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

??????????,LibUSB????????,????????????????????????LibUSB???,???????:http://libusb.info/