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Flash (0x0 ~ 0 xfff), which can be used for loading applications and for "application programming" (IAP) of user programs, that is, remote firmware upgrade, it can be configured through bl_config.h as a remote upgrade communication mode through serial port, IIC, SSI, Ethernet and USB. In the ser2enet folder, the main code for serial
requires 7 data lines, one times less than Mii, so the switch can access more than one data port. Like Mii, the RMII supports the bus interface speed of 10Mbps and 100Mbps.Smii is a media interface proposed by Cisco, which has less than rmii number of signal lines, s is the meaning of serial. Because it transmits data with only one signal line, a signal line transmits the data, so in order to meet the demand of 100Mbps bus interface speed, It has a c
bit (CTRL. SLU) to make the Mac and PHY connect, so the Mac is not packet-wrapped. This control bit will be set to 0 when reset. The PHY can be powered and powered down by the software, and the power-off state will not receive data except for receiving administrative commands. In addition, the PHY can also work in smart Power down mode, link down into the power-saving state; Some multi-port network car
The underlying application of Ti cortex m3 serial port to Ethernet routine is LWIP and the version is v1.3.2. For LWIP, a stranger can check it online. It is an open-source TCP/IP protocol written by Adam in Switzerland. Since the serial port to Ethernet routine is based on LWIP, let's see how LWIP is transplanted to T
cp2102. The price is 9 yuan. Comments by netizens: \ rThe biggest drawback of ft232bm is that it cannot work properly on some USB Hub without buffering (most of the USB with a bandwidth of 10 yuan), and the data volume will soon die, at the same time, all devices connected to the hub must be reset once before they can work normally. At the same time, if other USB
Recompile kernel (2.6.29)2.6.29 kernelDevice Drivers---> USB support---> USB Gadget Support--->where USB peripheral controller selected S3C2410 USB Device controllerThen choose a Gadget driver from the kernel to do the demo, here is the Ethernet Gadget (with CDC
Switch Ethernet port typeEthernet port type of the switch: Access, Trunk, and Hybrid Untag common ethernet packets. The NIC of a common PC can identify such packets for communication; the structure of the tag packet is changed after the source mac address and the target mac address, with 4-bytes vlan information added,
What are the advantages of a small pluggable (SFP) port for a Gigabit Ethernet switch? How do I connect the four SFP ports of a d-link DGS 1248 t smart switch? I think the main advantage of the SFP port is the flexibility to connect to the network. The SFP
End Port Type 1 Access User mode 2 Trunk Link Mode 3 hybrid mode (similar to trunk but higher than trunk) Two ports Introduction 2.1 Access Type port: Allow only the default VLAN Ethernet frames, that is, only one vlan,access port after receiving the Ethernet frame to the VL
The Ethernet port has three link types: AccessHybrid and Trunk. An Access port can belong to only one VLAN and is generally used to connect to a computer. A Trunk port can belong to multiple VLANs and receive and send packets from multiple VLANs, ports used for connection be
Background:At present, there is a JZ2440 board, before there is a complete set of development environment, due to the virtual machine failure needs to build a new server side, so this record building stepsEnvironment:Ubuntu16.4VMWare 12Advance Condition:Install the Ubuntu virtual machine in accordance with the custom steps, then follow the steps below to set up the VMware Ubuntu pc.1.VMWare part1.1 from edit, open the Virtual network editor as follows: VMnet0 Use bridge mode, this network
, which greatly saves the occupied address space and makes it possible to integrate other special peripherals. 4. Implementation of the CDC Class Based on AT89C5131 A btype USB socket is used for the hardware connection of the USB interface. According to the USB specification, the USB socket of the btype is used for
Intel motherboard USB 3.0 XHCI controller port configuration, 3.0 xhci Generally, Intel has two EHCI and one XHCI on the motherboard that supports USB 3.0 host controllers. This type of motherboard generally has 14 ports, and port 0-3 is shared by EHCI and XHCI, that is, port
, but now have USB to serial port device. But new problems have arisen, for example, the minicom under the PC and target computer communication or there are some configuration problems, the following is the Linux USB to the serial port configuration and problems:Note: By default, Ubuntu has a
problems:Note: By default, Ubuntu has a USB to serial port driver (pl2303) installed.1, # Lsmod | grep usbserialIf there is usbserial, the system supports USB to serial port.2, plug in the USB to the serial port, in the terminal
Technical Background: With the increasing number of USB port Devices, most devices can access data and perform various operations through computer connections. The number of USB port Devices increases and the number of USB ports increases, to
in the USB to the serial port, in the terminal input command #dmesg | grep ttyUSB0, if a connection success message appears, the Ubuntu system has identified the device.Note: Ubuntu in the virtual machine environment is not automatically recognized by default, you need to click "Prolific Usb-serial Controller" in the bottom right corner of the virtual machine wi
and load the driver:The newer Linux system already includes a USB-to-serial-port driver that can automatically identify the device. The new version of fedroa17 is also included by default, after plugging in, you can see the USB to serial port device in the dev directory. The specific output is as follows:
operation of the main purpose is to host the serial port and PCI extension of the difference between the serial port. The difference is that 4 of the content shown in the UART: Unknown unknow. However, if you detect this step when the UART is 16550A instead of unknow, prove that your system has known the expansion of the serial port, do not need further setup, j
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