#include <stdio.h>
#include <stdlib.h>
#include <libusb-1.0/libusb.h>

#define VENDOR_ID  0x1a86   // 替换为你的设备 VID
#define PRODUCT_ID 0x55de   // 替换为你的设备 PID
#define BULK_EP_OUT 0x06    // OUT端点地址（低位为0表示OUT）
#define INTERFACE_NUMBER 4  // USB接口编号

int main(void) {
    libusb_device_handle *handle = NULL;
    int r;
    int transferred;
    unsigned char send_data[] = {0x01, 0x02, 0x03, 0x04, 0x05}; // 要发送的数据

    // 初始化libusb
    r = libusb_init(NULL);
    if (r < 0) {
        fprintf(stderr, "Failed to init libusb: %s\n", libusb_error_name(r));
        return EXIT_FAILURE;
    }

    // 打开设备
    handle = libusb_open_device_with_vid_pid(NULL, VENDOR_ID, PRODUCT_ID);
    if (!handle) {
        fprintf(stderr, "Failed to open device\n");
        libusb_exit(NULL);
        return EXIT_FAILURE;
    }

    // 获取接口权限（可选，部分系统如Linux必须）
    if (libusb_kernel_driver_active(handle, INTERFACE_NUMBER)) {
        libusb_detach_kernel_driver(handle, INTERFACE_NUMBER);
    }

    r = libusb_claim_interface(handle, INTERFACE_NUMBER);
    if (r < 0) {
        fprintf(stderr, "Failed to claim interface: %s\n", libusb_error_name(r));
        libusb_close(handle);
        libusb_exit(NULL);
        return EXIT_FAILURE;
    }

    // 发送数据（Bulk OUT）
    r = libusb_bulk_transfer(handle, BULK_EP_OUT, send_data, sizeof(send_data), &transferred, 1000);
    if (r == 0) {
        printf("Sent %d\n", transferred);
        if (transferred != sizeof(send_data)) {
            fprintf(stderr, "Warning: Only %d of %zu bytes sent\n", transferred, sizeof(send_data));
        }
    } else {
        fprintf(stderr, "Failed to send data: %s\n", libusb_error_name(r));
    }

    // 释放接口 & 关闭
    libusb_release_interface(handle, INTERFACE_NUMBER);
    libusb_close(handle);
    libusb_exit(NULL);

    return EXIT_SUCCESS;
}