GSM modem设备,其关键驱动文件为STM32MP157\drivers\usb\serial\option.c,该驱动会通过下述代码,向usb core注册一个usb-serial module。 static struct usb_serial_driver * const serial_drivers[] = { &option_1port_device, NULL }; module_usb_serial_driver(serial_drivers, option_ids); 查看module_usb_...
In addition, UWP applications can now use the APIs provided by theWindows.Devices.SerialCommunicationnamespace that allow apps to talk to these devices. Usbser.sys installation Load the Microsoft-provided in-box driver (Usbser.sys) for your communications and CDC control device. ...
C-Configuration,I-Interface,E-Endpoint。 可以看到该设备只有一个Configuarion,该Configuration由3个Interface组成。每个Interface都有两个Endpoint(一个IN,一个OUT)。 其中Interface 0的驱动为cdc_eem,为USB CDC设备,即USB以太网网卡,Interface 1、2为USB serial设备,分别用于执行AT command和跟踪设备Trace log。 3...
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从进入usb_serial_probe()开始,usb-serial驱动才真正进入到驱动内部。 一、usb_serial_probe()---接口与驱动的精确匹配 1、查找匹配的驱动,此时匹配的驱动就是pl2303。 type=search_serial_device(interface); // 遍历usb_serial_driver_list链表,搜索与该interface匹配的驱动,此时type为drv 2、创建...
3) Double clickUniversal Serial Bus controllers(or any other categories that your USB C device belongs to), then right click on yourUSB-C device, and clickUpdate driver. 4) You’ll be presented with two options: Search automatically for updated driver software: choose this option is you want...
generic.c 通用的用户驱动,用户如果写自己的驱动只需拿自己的实现代替generic.c的函数,一般这个驱动已经能适应大部分设备了 现在我们来看usb_serial模块的初始化过程 staticint __init usb_serial_init(void) { int i; int result; usb_serial_tty_driver = alloc_tty_driver(SERIAL_TTY_MINORS); ...
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从Windows 10 开始,Windows 应用可以使用Windows.Devices.SerialCommunication命名空间向Usbser.sys发送请求。 它定义了 Windows 运行时类,这些类可用于通过串行端口或某个串行端口抽象与 USB CDC 设备通信。 这些类提供了发现此类串行设备、读写数据和控制流控制的串行特定属性(如设置波特率、信号状态)的功能。
1.手机是否处于开机状态。若手机连接电脑时屏幕已锁屏，建议先将屏幕解锁。2.下滑手机屏幕顶帘，查看通知栏是否有提示“已连接为媒体设备”或“已连接进行充电”-勾选“媒体设备MTP”。3.关闭USB调试尝试。4.检查电脑中Windows Media Player是否安装，检查该软件版本是否在11以上，若版本较低，建议更新或...