输入/输出切换模块的实现代码如下: --申明所使用的包library IEEE;use IEEE.STD_LOGIC_1164.all;-- 申明实体entity IOSwitch isport(data : inout STD_LOGIC_VECTOR(7 downto 0); -- 8 位双向数据总线,和 PDIUSBD12 相连din : in STD_LOGIC_VECTOR(7 downto 0); -- 8 位输入数据总线,仅用于输入do...
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AI代码解释 staticinttest_probe(struct usb_interface*intf,conststruct usb_device_id*id)//资源探索函数{/*获取端点描述符*/struct usb_endpoint_descriptor*endpoint=&interface->endpoint[0].desc;switch(endpoint->bmAttributes){case0:printk("设备支持控制传输.\n");break;case1:printk("设备支持同步传输.\...
使用从 StartSyncBackgroundTaskAsync 返回的 DeviceTriggerResults 对象来确定后台任务是否已成功启动。 switch 语句用于检查 DeviceTriggerResults 的结果。 实现专用 OnSyncWithDeviceProgress 事件处理程序,该事件处理程序将使用后台任务的进度更新应用 UI。 实现专用 OnSyncWithDeviceCompleted 事件处理程序,以便在后台任务...
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irp = IoAllocateIrp (DeviceContext->TopOfStackDeviceObject->StackSize, FALSE); nextStack = IoGetNextIrpStackLocation (irp); nextStack->MajorFunction = IRP_MJ_INTERNAL_DEVICE_CONTROL; nextStack->Parameters.DeviceIoControl.IoControlCode = IOCTL_INTERNAL_USB_SUBMIT_IDLE_NOTIFICATION; nextStack->Paramete...
{//Idle IRP completes with error.switch(ntStatus) {caseSTATUS_INVALID_DEVICE_REQUEST://Invalid request.break;caseSTATUS_CANCELLED://1. The device driver canceled the IRP.//2. A system power state change is required.break;caseSTATUS_POWER_STATE_INVALID:// Device driver requested a D3 power ...
drivers/usb/core/hub.c:4424:#defineusb_sndaddr0pipe() (PIPE_CONTROL << 30) // 采用控制传输方式、设备地址为0、端点号为0、传输方向主机->设备 调用usb_new_device函数: 先是调用usb_enumerate_device获取usb设备配置描述信息(这里枚举获取的pid、vid等用于设备驱动匹配的id使用): ...
而如果RC收到了beacon,则RC的这个port会进DETECT;还有就是RC的port被software要求从L2进DETECT,这是RC主动要求退出的情况。 这里展开解释下,一个最下游的device要退出低功耗L2,就往上游发送beacon信号,对接的switch相对应的port也被带着退出;直到连RC下游口都接收到了beacon,这期间从device一路到了RC的Downstream口...
Introducing the USB4™ Switch As part of the MUTT (Microsoft USB Test Tool) family and a follow-on to the USB Type-C Connection Exerciser, we are excited to introduce the USB4 Switch: a USB Type-C 1:2 programmable switch, compati... Philip FroeseMicrosoft USB BlogSep 18, 2019 21KVi...