- struct vsfusbd_iface_t
- {
- // public
- struct vsfusbd_class_protocol_t *class_protocol;
- void *protocol_param;
- // private
- ......
- };
- struct vsfusbd_config_t
- {
- // public
- vsf_err_t (*init)(struct vsfusbd_device_t *device);
- vsf_err_t (*fini)(struct vsfusbd_device_t *device);
- uint8_t num_of_ifaces;
- struct vsfusbd_iface_t *iface;
- // private
- ......
- };
- struct vsfusbd_device_t
- {
- // public
- uint8_t num_of_configuration;
- struct vsfusbd_config_t *config;
- struct vsfusbd_desc_filter_t *desc_filter;
- uint8_t device_class_iface;
- struct vsfhal_usbd_t *drv;
- int32_t int_priority;
- void (*on_EVENT)(struct vsfusbd_device_t *device,
- enum vsfusbd_usr_evt_t evt, void *param);
- // private
- ......
- };
其中，最主要的就是定义vsfusbd_device_t结构，表明是实现什么USB设备，以及相应的设备参数。
struct vsfusbd_device_t：
1. uint8_t num_of_configuration：USB设备的配置数量，一般为1
2. struct vsfusbd_config_t *config：USB设备的配置数组指针
3. struct vsfusbd_desc_filter_t *desc_filter：设备的描述符列表
4. uint8_t device_class_iface：设备默认的设备类型对应的接口
5. struct vsfhal_usbd_t *drv和int32_t int_priority：底层USB驱动接口和中断优先级
6. void (*on_EVENT)(......)：事件回调接口，一般设置为NULL
栗子：
- .usbd.device.num_of_configuration = dimof(usrapp.usbd.config),
- .usbd.device.config = usrapp.usbd.config,
- .usbd.device.desc_filter = (struct vsfusbd_desc_filter_t *)usrapp_param.usbd.StdDesc,
- .usbd.device.device_class_iface = 0,
- .usbd.device.drv = (struct vsfhal_usbd_t *)&vsfhal_usbd,
- .usbd.device.int_priority = 0xFF,
struct vsfusbd_config_t：
1. init和fini：配置初始化和终止化接口，一般设置为NULL
2. uint8_t num_of_ifaces：接口数量
3. struct vsfusbd_iface_t *iface：接口数组指针
栗子：
- .usbd.config[0].num_of_ifaces = dimof(usrapp.usbd.ifaces),
- .usbd.config[0].iface = usrapp.usbd.ifaces,
struct vsfusbd_iface_t：
1. struct vsfusbd_class_protocol_t *class_protocol：接口类驱动
2. void *protocol_param：接口类参数
栗子：
- .usbd.ifaces[0].class_protocol = (struct vsfusbd_class_protocol_t *)&vsfusbd_CDCACMControl_class,
- .usbd.ifaces[0].protocol_param = &usrapp.usbd.cdc.param,
- .usbd.ifaces[1].class_protocol = (struct vsfusbd_class_protocol_t *)&vsfusbd_CDCACMData_class,
- .usbd.ifaces[1].protocol_param = &usrapp.usbd.cdc.param,
描述符列表栗子：
- .usbd.StdDesc =
- {
- VSFUSBD_DESC_DEVICE(0, usrapp_param.usbd.DeviceDescriptor, sizeof(usrapp_param.usbd.DeviceDescriptor)),
- VSFUSBD_DESC_CONFIG(0, 0, usrapp_param.usbd.ConfigDescriptor, sizeof(usrapp_param.usbd.ConfigDescriptor)),
- VSFUSBD_DESC_STRING(0, 0, usrapp_param.usbd.StringLangID, sizeof(usrapp_param.usbd.StringLangID)),
- VSFUSBD_DESC_STRING(0x0409, 1, usrapp_param.usbd.StringVendor, sizeof(usrapp_param.usbd.StringVendor)),
- VSFUSBD_DESC_STRING(0x0409, 2, usrapp_param.usbd.StringProduct, sizeof(usrapp_param.usbd.StringProduct)),
- VSFUSBD_DESC_STRING(0x0409, 4, usrapp_param.usbd.StringFunc_CDC, sizeof(usrapp_param.usbd.StringFunc_CDC)),
- VSFUSBD_DESC_NULL,
- },
这些数据结构如果定义OK之后，要启动USB就非常简单了：
- vsfusbd_device_init(&app->usbd.device);
- vsfusbd_connect(&app->usbd.device);
- static void usrapp_usbd_conn(void *p)
- {
- struct usrapp_t *app = (struct usrapp_t *)p;
- vsfusbd_device_init(&app->usbd.device);
- vsfusbd_connect(&app->usbd.device);
- if (app_hwcfg.usbd.pullup.port != VSFHAL_DUMMY_PORT)
- vsfhal_gpio_set(app_hwcfg.usbd.pullup.port, 1 << app_hwcfg.usbd.pullup.pin);
- }
- void usrapp_srt_init(struct usrapp_t *app)
- {
- STREAM_INIT(&app->usbd.cdc.stream_rx);
- STREAM_INIT(&app->usbd.cdc.stream_tx);
- vsfshell_init(&app->shell);
- if (app_hwcfg.usbd.pullup.port != VSFHAL_DUMMY_PORT)
- {
- vsfhal_gpio_init(app_hwcfg.usbd.pullup.port);
- vsfhal_gpio_clear(app_hwcfg.usbd.pullup.port, 1 << app_hwcfg.usbd.pullup.pin);
- vsfhal_gpio_config(app_hwcfg.usbd.pullup.port, app_hwcfg.usbd.pullup.pin, VSFHAL_GPIO_OUTPP);
- }
- vsfusbd_disconnect(&app->usbd.device);
- vsftimer_create_cb(200, 1, usrapp_usbd_conn, app);
- }
需要用到的API：
1. vsfusbd_device_init：初始化USB设备
2. vsfusbd_connect：连接USB设备
3. vsfusbd_disconnect：断开USB设备
4. vsfusbd_wakeup：远程唤醒USB主机
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