Attachment 872366 Details for Bug 1217492

A test program

test_libusb_get_active_config_desc.c (text/x-csrc), 2.28 KB, created by Lin Ma on 2024-02-01 09:37:12 UTC

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Filename:

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Creator: Lin Ma

Created: 2024-02-01 09:37:12 UTC

Size: 2.28 KB

patch

obsolete

>#include <stdio.h>
>#include <libusb-1.0/libusb.h>
>
>#define VENDOR_ID   0x1cf1
>#define PRODUCT_ID  0x0030
>
>int main() {
>    libusb_context *context = NULL;
>    libusb_device_handle *dev_handle = NULL;
>    int rc;
>    // Set debugging output to stderr
>    int loglevel = 3;
>
>    // Initialize libusb
>    if (libusb_init(&context) < 0) {
>        fprintf(stderr, "Error initializing libusb\n");
>        return 1;
>    }
>
>    libusb_set_option(context, LIBUSB_OPTION_LOG_LEVEL, loglevel);
>
>    dev_handle = libusb_open_device_with_vid_pid(context, VENDOR_ID, PRODUCT_ID);
>    if (dev_handle == NULL) {
>        fprintf(stderr, "Error opening USB device\n");
>        libusb_exit(context);
>        return 1;
>    }
>
>    printf("LIBUSB_SUCCESS             =   0\n");
>    printf("LIBUSB_ERROR_IO            =  -1\n");
>    printf("LIBUSB_ERROR_INVALID_PARAM =  -2\n");
>    printf("LIBUSB_ERROR_ACCESS        =  -3\n");
>    printf("LIBUSB_ERROR_NO_DEVICE     =  -4\n");
>    printf("LIBUSB_ERROR_NOT_FOUND     =  -5\n");
>    printf("LIBUSB_ERROR_BUSY          =  -6\n");
>    printf("LIBUSB_ERROR_TIMEOUT       =  -7\n");
>    printf("LIBUSB_ERROR_OVERFLOW      =  -8\n");
>    printf("LIBUSB_ERROR_PIPE          =  -9\n");
>    printf("LIBUSB_ERROR_INTERRUPTED   = -10\n");
>    printf("LIBUSB_ERROR_NO_MEM        = -11\n");
>    printf("LIBUSB_ERROR_NOT_SUPPORTED = -12\n");
>    printf("LIBUSB_ERROR_OTHER         = -99\n");
>    // Get the active configuration descriptor
>    struct libusb_config_descriptor *config;
>    rc = libusb_get_active_config_descriptor(libusb_get_device(dev_handle), &config);
>    printf("rc = %d\n", rc);
>    if (libusb_get_active_config_descriptor(libusb_get_device(dev_handle), &config) < 0) {
>        fprintf(stderr, "Error getting active configuration descriptor\n");
>        libusb_close(dev_handle);
>        libusb_exit(context);
>        return 1;
>    }
>
>    // Display information about the active configuration
>    printf("Active Configuration:\n");
>    printf("  Configuration Value: %d\n", config->bConfigurationValue);
>    printf("  Number of Interfaces: %d\n", config->bNumInterfaces);
>
>    // iterate through interfaces and endpoints if needed
>    // ...
>
>    // Free the configuration descriptor
>    libusb_free_config_descriptor(config);
>
>    libusb_close(dev_handle);
>
>    libusb_exit(context);
>
>    return 0;
>}
>

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Attachments on bug 1217492: 872228 | 872230 | 872240 | 872322 | 872323 | 872366 | 872500 | 873363 | 873372 | 873373