usb转串口驱动程序源代码

#include <usb.h>

static struct usb_interface_descriptor interface_desc = {
    .bLength = sizeof(struct usb_interface_descriptor),
    .bDescriptorType = USB_DT_INTERFACE,
    .bInterfaceNumber = 0,
    .bAlternateSetting = 0,
    .bNumEndpoints = 2,
    .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
    .bInterfaceSubClass = USB_CDC_SUBCLASS_ACM,
    .bInterfaceProtocol = USB_CDC_PROTOCOL_AT,
    .iInterface = 0,
};

static struct usb_endpoint_descriptor endpoint_desc[] = {
    {
        .bLength = sizeof(struct usb_endpoint_descriptor),
        .bDescriptorType = USB_DT_ENDPOINT,
        .bEndpointAddress = USB_DIR_IN | USB_ENDPOINT_1,
        .bmAttributes = USB_ENDPOINT_XFER_BULK,
        .wMaxPacketSize = 64,
        .bInterval = 1,
    },
    {
        .bLength = sizeof(struct usb_endpoint_descriptor),
        .bDescriptorType = USB_DT_ENDPOINT,
        .bEndpointAddress = USB_DIR_OUT | USB_ENDPOINT_1,
        .bmAttributes = USB_ENDPOINT_XFER_BULK,
        .wMaxPacketSize = 64,
        .bInterval = 1,
    },
};

static struct usb_interface interfaces[] = {
    {
        .cur_altsetting = &interface_desc,
        .altsetting = {
            &interface_desc,
        },
        .endpoints = endpoint_desc,
        .num_endpoints = ARRAY_SIZE(endpoint_desc),
    },
};

struct usb_device_descriptor device_desc = {
    .bLength = sizeof(struct usb_device_descriptor),
    .bDescriptorType = USB_DT_DEVICE,
    [...]
};

struct usb_device usb_dev = {
    .descriptor = &device_desc,
    .config = {
        .interface = interfaces,
        .bNumInterfaces = ARRAY_SIZE(interfaces),
    },
    [...]
};