libusb 接口已声明
我正在使用 libusb 为 USB 设备编写设备驱动程序。当我尝试认领该设备时，我收到错误代码 LIBUSB_ERROR_BUSY (-6)。根据文档，这意味着该设备已被认领（链接 ）。
我如何找出哪个驱动程序/程序已声明该设备，更重要的是，我自己如何在设备声明后声明该设备。
代码片段：
r = libusb_claim_interface(handle[0], 0);
if (r < 0) {
fprintf(stderr, "libusb_claim_interface error %d\n", r);
goto out_release;
}
printf("claimed interface\n");
输出：
libusb_claim_interface error -6
I'm writing a device driver for a usb device using libusb. When I attempt to claim the device I get the error code LIBUSB_ERROR_BUSY (-6). According to the documentation that means that the device has already been claimed (link).
How do I find out which driver/program has claimed the device and more importantly, how can I, myself, claim the device once it's claimed.
Code snippet:
r = libusb_claim_interface(handle[0], 0);
if (r < 0) {
fprintf(stderr, "libusb_claim_interface error %d\n", r);
goto out_release;
}
printf("claimed interface\n");
Output:
libusb_claim_interface error -6
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评论（3）
您是否在
libusb_claim_interface()之前调用libusb_detach_kernel_driver()？这可能是必要的。Do you call
libusb_detach_kernel_driver()beforelibusb_claim_interface()? This may be necessary.该问题很可能是另一个 Linux 驱动程序声明了该接口。调用 libusb_detach_kernel_driver() 并指定接口号，然后您应该能够连接它。
The issue is most likely that interface is claimed by another Linux driver. call
libusb_detach_kernel_driver()and specify the interface number and then you should be able to connect it.您是否在
libusb_claim_interface()之前调用了libusb_set_configuration()？即使描述符中只有一种配置，也必须调用此函数。
Did you call
libusb_set_configuration()beforelibusb_claim_interface()?This must be called even if there is only one configuration in the descriptor.