USB虚拟成CDC设备问题

发布于 2020-08-27 22:19:10 浏览：1789 订阅该版

目前我是用的USB控制器是DWC，然后把usb2.0虚拟成cdc，当usb接到电脑上的时候，可以在设备管理其上看到com口。但是当我使用串口调试助手去链接这个com口的时候，发现无法打开。一时找不到答案，我的usb如下配置：
#define RT_USING_USB_DEVICE
#define RT_USBD_THREAD_STACK_SZ 4096
#define USB_VENDOR_ID 0x0FFE
#define USB_PRODUCT_ID 0x0001
#define RT_USB_DEVICE_COMPOSITE
#define RT_USB_DEVICE_CDC
#define RT_USB_DEVICE_NONE
#define RT_VCOM_TASK_STK_SIZE 512
#define RT_CDC_RX_BUFSIZE 128
#define RT_VCOM_SERNO "32021919830108"
#define RT_VCOM_SER_LEN 14
#define RT_VCOM_TX_TIMEOUT 1000

static struct ep_id __ep_pool[] =
{
    {0x00, USB_EP_ATTR_CONTROL,     USB_DIR_INOUT,  64, ID_ASSIGNED},
#if DWC_FORCE_SPEED_FULL
    {0x01, USB_EP_ATTR_INT,         USB_DIR_IN,     64, ID_UNASSIGNED},
    {0x02, USB_EP_ATTR_BULK,        USB_DIR_OUT,    64, ID_UNASSIGNED},
    {0x02, USB_EP_ATTR_BULK,        USB_DIR_IN,     64, ID_UNASSIGNED},
    {0x04, USB_EP_ATTR_BULK,        USB_DIR_OUT,    64, ID_UNASSIGNED},
    {0x04, USB_EP_ATTR_BULK,        USB_DIR_IN,     64, ID_UNASSIGNED},
#else
    {0x01, USB_EP_ATTR_INT,         USB_DIR_IN,    512, ID_UNASSIGNED},
    {0x01, USB_EP_ATTR_INT,         USB_DIR_OUT,   512, ID_UNASSIGNED},

{0x02, USB_EP_ATTR_BULK,        USB_DIR_OUT,   512, ID_UNASSIGNED},
    {0x02, USB_EP_ATTR_BULK,        USB_DIR_IN,    512, ID_UNASSIGNED},

{0x04, USB_EP_ATTR_BULK,        USB_DIR_OUT,   512, ID_UNASSIGNED},
    {0x04, USB_EP_ATTR_BULK,        USB_DIR_IN,    512, ID_UNASSIGNED},

{0x06, USB_EP_ATTR_BULK,        USB_DIR_OUT,   512, ID_UNASSIGNED},
    {0x06, USB_EP_ATTR_BULK,        USB_DIR_IN,    512, ID_UNASSIGNED},
#endif
    {0xFF, USB_EP_ATTR_TYPE_MASK,   USB_DIR_MASK,   0,  ID_ASSIGNED}
};