CDC-ACM是最简单的,endpoint里面拿到的就是原始数据,不用转换。而像CDC-ECM这种,里面的数据则是要经过IP TCP(UDP)等协议转换之后才能给到应用层处理。 下面针对开发步骤进行说明。 1、模板使用的是GD的工程里面单USB CDC-ACM的。新建一个源文件,比如叫做dual\\_cdc\\_acm.c,将cdc\\_acm\\_core.c里面的内...
USB 虚拟串口简介 1. USB虚拟串口简介 2.usb gadget 串口(serial)的配置和使用 3.USB中CDC-ECM的了解和配置 1. USB虚拟串口简介 USB虚拟串口属于USB通信设备类。在物理层通过USB总线,采用虚拟串口的方式为主机提供一个物理串口。在系统内部,USB控制器提供了一个批量传输IN端点和一个批量传输的OUT端点,用于数据的...
android的USBMTP &&USBCDC/USBnet(ECM, NCM,ACM) &&USBgardget MTP的全称是Media Transfer Protocol(媒体传输协议),它是微软公司提出的一套媒体文件传输协议。早在智能手机普及前,数码相机和MP3播放器等都使用了MTP的前身PTP(Picture Transfer Protocol)进行 ...
The ECM (Ethernet Networking Control Model) protocol is used for exchanging Ethernet-framed data between the device and host. A CDC ECM compliant device exposes itself as a virtual NIC to the host operating system. The NIC is assigned with a MAC and an IP address. A general use case of a...
定长度传输等。CDC-ACM是最简单的，endpoint里面拿到的就是原始数据，不用转换。而像CDC-ECM这种，里面...
The ECM (Ethernet Networking Control Model) protocol is used for exchanging Ethernet-framed data between the device and host. A CDC ECM compliant device exposes itself as a virtual NIC to the host operating system. The NIC is assigned with a MAC and an IP address. ...
The ECM (Ethernet Networking Control Model) protocol is used for exchanging Ethernet-framed data between the device and host. A CDC ECM compliant device exposes itself as a virtual NIC to the host operating system. The NIC is assigned with a MAC and an IP address. ...
A general use case of a CDC ECM device is a point-to-point Ethernet adapter to a LAN/WLAN. (3)CDC-NCM (Network Control Model).The NCM (Network Control Model) protocol is used for exchanging High Speed Ethernet-framed data between the device and host. A CDC NCM compliant device exposes...
硬件特性 USB2.0四线:5V,D-,D+,GND。 USB3.0一般十线:5V,D-,D+,GND,SSTX+,SSTX-,SSRX+,SSRX-,P1_Drain,P2_Drain 3. 电流 USB3.0标准要求USB3.0接口供电能力为... yuxi_o 0 3957 QUARTUS15.0版本usb-blaster驱动蓝屏 2019-12-09 15:53 − 刚开始学fpga 在计数器板级验证的时候,插上usb ...