268 lines
7.8 KiB
ReStructuredText
268 lines
7.8 KiB
ReStructuredText
主机协议栈
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=========================
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关于主机协议栈中结构体的命名、分类、成员组成，参考下面这两张图：
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.. figure:: img/api_host1.png
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.. figure:: img/api_host2.png
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CORE
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-----------------
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CLASS 驱动信息结构体
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""""""""""""""""""""""""""""""""""""
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.. code-block:: C
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struct usbh_class_info {
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uint8_t match_flags; /* Used for product specific matches; range is inclusive */
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uint8_t bInterfaceClass; /* Base device class code */
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uint8_t bInterfaceSubClass; /* Sub-class, depends on base class. Eg. */
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uint8_t bInterfaceProtocol; /* Protocol, depends on base class. Eg. */
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const uint16_t (*id_table)[2]; /* List of Vendor/Product ID pairs */
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const struct usbh_class_driver *class_driver;
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};
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端点结构体
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""""""""""""""""""""""""""""""""""""
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.. code-block:: C
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struct usbh_endpoint {
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struct usb_endpoint_descriptor ep_desc;
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};
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接口备用结构体
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""""""""""""""""""""""""""""""""""""
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.. code-block:: C
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struct usbh_interface_altsetting {
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struct usb_interface_descriptor intf_desc;
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struct usbh_endpoint ep[CONFIG_USBHOST_MAX_ENDPOINTS];
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};
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接口结构体
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""""""""""""""""""""""""""""""""""""
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.. code-block:: C
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struct usbh_interface {
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char devname[CONFIG_USBHOST_DEV_NAMELEN];
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struct usbh_class_driver *class_driver;
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void *priv;
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struct usbh_interface_altsetting altsetting[CONFIG_USBHOST_MAX_INTF_ALTSETTINGS];
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uint8_t altsetting_num;
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};
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配置结构体
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""""""""""""""""""""""""""""""""""""
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.. code-block:: C
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struct usbh_configuration {
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struct usb_configuration_descriptor config_desc;
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struct usbh_interface intf[CONFIG_USBHOST_MAX_INTERFACES];
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};
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hubport 结构体
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""""""""""""""""""""""""""""""""""""
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.. code-block:: C
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struct usbh_hubport {
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bool connected; /* True: device connected; false: disconnected */
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uint8_t port; /* Hub port index */
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uint8_t dev_addr; /* device address */
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uint8_t speed; /* device speed */
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uint8_t depth; /* distance from root hub */
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uint8_t route; /* route string */
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uint8_t slot_id; /* slot id */
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struct usb_device_descriptor device_desc;
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struct usbh_configuration config;
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const char *iManufacturer;
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const char *iProduct;
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const char *iSerialNumber;
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uint8_t *raw_config_desc;
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struct usb_setup_packet *setup;
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struct usbh_hub *parent;
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struct usbh_hub *self; /* if this hubport is a hub */
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struct usbh_bus *bus;
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struct usb_endpoint_descriptor ep0;
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struct usbh_urb ep0_urb;
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usb_osal_mutex_t mutex;
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};
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hub 结构体
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""""""""""""""""""""""""""""""""""""
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.. code-block:: C
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struct usbh_hub {
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bool connected;
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bool is_roothub;
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uint8_t index;
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uint8_t hub_addr;
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uint8_t speed;
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uint8_t nports;
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uint8_t powerdelay;
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uint8_t tt_think;
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bool ismtt;
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struct usb_hub_descriptor hub_desc; /* USB 2.0 only */
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struct usb_hub_ss_descriptor hub_ss_desc; /* USB 3.0 only */
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struct usbh_hubport child[CONFIG_USBHOST_MAX_EHPORTS];
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struct usbh_hubport *parent;
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struct usbh_bus *bus;
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struct usb_endpoint_descriptor *intin;
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struct usbh_urb intin_urb;
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uint8_t *int_buffer;
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struct usb_osal_timer *int_timer;
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};
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usbh_initialize
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""""""""""""""""""""""""""""""""""""
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``usbh_initialize`` 用来初始化 usb 主机协议栈，包括：初始化 usb 主机控制器，创建 roothub 设备，创建 hub 检测线程。
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.. code-block:: C
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int usbh_initialize(uint8_t busid, uint32_t reg_base, usbh_event_handler_t event_handler);
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- **busid** bus id，从 0开始，不能超过 `CONFIG_USBHOST_MAX_BUS`
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- **reg_base** hcd 寄存器基地址
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- **event_handler** host 事件回调函数，可以为NULL
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- **return** 0 表示正常其他表示错误
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usbh_find_class_instance
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""""""""""""""""""""""""""""""""""""
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``usbh_find_class_instance`` 根据注册的 class 名称查找对应的 class 结构体句柄。
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.. code-block:: C
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void *usbh_find_class_instance(const char *devname);
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- **devname** class 名称
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- **return** class 结构体句柄
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lsusb
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""""""""""""""""""""""""""""""""""""
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``lsusb`` 用来查看和操作 hub 上的设备信息。需要借助 shell 插件使用。
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.. code-block:: C
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int lsusb(int argc, char **argv);
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SERIAL
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-----------------
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usbh_serial_open
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""""""""""""""""""""""""""""""""""""
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``usbh_serial_open`` 根据路径打开一个串口设备。
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.. code-block:: C
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struct usbh_serial *usbh_serial_open(const char *devname, uint32_t open_flags);
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- **devname** 串口路径
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- **open_flags** 打开标志，参考 `USBH_SERIAL_OFLAG_*` 定义
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- **return** serial 结构体句柄
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usbh_serial_close
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""""""""""""""""""""""""""""""""""""
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``usbh_serial_close`` 关闭串口设备。
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.. code-block:: C
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void usbh_serial_close(struct usbh_serial *serial);
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- **serial** serial 结构体句柄
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usbh_serial_control
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""""""""""""""""""""""""""""""""""""
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``usbh_serial_control`` 对串口进行配置。
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.. code-block:: C
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int usbh_serial_control(struct usbh_serial *serial, int cmd, void *arg);
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- **serial** serial 结构体句柄
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- **cmd** 控制命令，参考 `USBH_SERIAL_CMD_*` 定义
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- **arg** 控制参数指针
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- **return** 0 表示正常其他表示错误
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usbh_serial_write
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""""""""""""""""""""""""""""""""""""
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``usbh_serial_write`` 向串口写数据。
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.. code-block:: C
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int usbh_serial_write(struct usbh_serial *serial, const void *buffer, uint32_t buflen);
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- **serial** serial 结构体句柄
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- **buffer** 数据缓冲区指针
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- **buflen** 要写入的数据长度，如果是 USB2TTL 设备，一次最高 wMaxPacketSize
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- **return** 实际写入的数据长度或者错误码
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.. note:: 有无设置波特率都可以使用该 API，当未设置波特率时，长度无限制，如果设置了波特率则为 wMaxPacketSize。
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usbh_serial_read
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""""""""""""""""""""""""""""""""""""
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``usbh_serial_read`` 从串口读数据。 **如果没有设置波特率，不允许使用该 API，设置波特率后，内部会开启 rx 接收并将数据写入 ringbuf **。
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.. code-block:: C
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int usbh_serial_read(struct usbh_serial *serial, void *buffer, uint32_t buflen);
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- **serial** serial 结构体句柄
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- **buffer** 数据缓冲区指针
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- **buflen** 要读取的最大数据长度
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- **return** 实际读取的数据长度或者错误码
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usbh_serial_cdc_write_async
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""""""""""""""""""""""""""""""""""""
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``usbh_serial_cdc_write_async`` 异步从串口读数据。 **如果设置了波特率，不允许使用该 API**。
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.. code-block:: C
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int usbh_serial_cdc_write_async(struct usbh_serial *serial, uint8_t *buffer, uint32_t buflen, usbh_complete_callback_t complete, void *arg);
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- **serial** serial 结构体句柄
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- **buffer** 数据缓冲区指针
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- **buflen** 要发送的数据长度
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- **complete** 读数据完成回调函数
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- **arg** 回调函数参数
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- **return** 0 表示正常其他表示错误
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usbh_serial_cdc_read_async
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""""""""""""""""""""""""""""""""""""
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``usbh_serial_cdc_read_async`` 异步从串口读数据。 **如果设置了波特率，不允许使用该 API，设置波特率后，内部会开启 rx 接收并将数据写入 ringbuf **。
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.. code-block:: C
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int usbh_serial_cdc_read_async(struct usbh_serial *serial, uint8_t *buffer, uint32_t buflen, usbh_complete_callback_t complete, void *arg);
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- **serial** serial 结构体句柄
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- **buffer** 数据缓冲区指针
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- **buflen** 要读取的最大数据长度，一次最高 16K。并且需要是 wMaxPacketSize 的整数倍
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- **complete** 读数据完成回调函数
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- **arg** 回调函数参数
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- **return** 0 表示正常其他表示错误
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HID
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-----------------
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MSC
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-----------------
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NETWORK
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----------------- |