RK3568识别USB2.0U盘代码

您好！对于RK3568芯片来说，识别USB2.0 U盘的代码可以参考以下示例：

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <linux/usbdevice_fs.h>

int main() {
    int fd = open("/dev/bus/usb/001/001", O_RDWR);  // 替换为您的设备路径

    if (fd < 0) {
        perror("Failed to open USB device");
        return -1;
    }

    struct usbdevfs_ctrltransfer ctrl;
    ctrl.bRequestType = USB_DIR_IN | USB_TYPE_STANDARD | USB_RECIP_DEVICE;
    ctrl.bRequest = USB_REQ_GET_DESCRIPTOR;
    ctrl.wValue = (USB_DT_DEVICE << 8) | 0;
    ctrl.wIndex = 0;
    ctrl.wLength = 18;
    ctrl.data = (void*)malloc(ctrl.wLength);

    if (ioctl(fd, USBDEVFS_CONTROL, &ctrl) < 0) {
        perror("Failed to send control request");
        close(fd);
        return -1;
    }

    unsigned char* data = (unsigned char*)ctrl.data;
    printf("USB version: %u.%u\n", data[2], data[3]);

    free(ctrl.data);
    close(fd);

    return 0;
}

请注意，上述代码中的`"/dev/bus/usb/001/001"`是一个示例USB设备路径，您需要根据您的系统中实际的设备路径进行替换。您可以使用`lsusb`命令来查看已连接的USB设备以