linux usb通信编程

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

#define VENDOR_ID  0x1234
#define PRODUCT_ID 0x5678

int main() {
    libusb_context *context = NULL;
    libusb_device_handle *handle = NULL;

    // 初始化libusb
    if (libusb_init(&context) < 0) {
        fprintf(stderr, "Failed to initialize libusb\n");
        return 1;
    }

    // 打开设备
    handle = libusb_open_device_with_vid_pid(context, VENDOR_ID, PRODUCT_ID);
    if (handle == NULL) {
        fprintf(stderr, "Failed to open USB device\n");
        libusb_exit(context);
        return 1;
    }

    // 设置配置
    if (libusb_set_configuration(handle, 1) < 0) {
        fprintf(stderr, "Failed to set configuration\n");
        libusb_close(handle);
        libusb_exit(context);
        return 1;
    }

    // 声明端点
    unsigned char data[64];
    int transferred;

    // 读取数据
    if (libusb_bulk_transfer(handle, 0x81, data, sizeof(data), &transferred, 1000) < 0) {
        fprintf(stderr, "Failed to read data\n");
    } else {
        printf("Read %d bytes: ", transferred);
        for (int i = 0; i < transferred; i++) {
            printf("%02x ", data[i]);
        }
        printf("\n");
    }

    // 关闭设备并退出
    libusb_close(handle);
    libusb_exit(context);
    return 0;
}