CN106506714B - Configuration method for USB-to-Ethernet network card and network equipment - Google Patents
Configuration method for USB-to-Ethernet network card and network equipment Download PDFInfo
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- CN106506714B CN106506714B CN201610878991.2A CN201610878991A CN106506714B CN 106506714 B CN106506714 B CN 106506714B CN 201610878991 A CN201610878991 A CN 201610878991A CN 106506714 B CN106506714 B CN 106506714B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L2101/00—Indexing scheme associated with group H04L61/00
- H04L2101/60—Types of network addresses
- H04L2101/618—Details of network addresses
- H04L2101/622—Layer-2 addresses, e.g. medium access control [MAC] addresses
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/42—Bus transfer protocol, e.g. handshake; Synchronisation
- G06F13/4282—Bus transfer protocol, e.g. handshake; Synchronisation on a serial bus, e.g. I2C bus, SPI bus
Abstract
The invention relates to a configuration method for converting USB to Ethernet network card, wherein the USB to Ethernet network card comprises a USB to Ethernet chip; the method comprises the following steps: setting an MAC address storage area on the USB-to-Ethernet chip; generating a static MAC address; the static MAC address is different from the inherent MAC address of the USB-to-Ethernet chip; and storing the static MAC address in the MAC address storage area and the MAC address register of the USB-to-Ethernet chip as the MAC address of the USB-to-Ethernet network card. By adopting the configuration method, the MAC address of the USB-to-Ethernet network card is configured without configuration equipment such as an external EEPROM chip and the like, thereby being beneficial to saving the product cost. The invention also provides network equipment.
Description
Technical Field
the invention relates to the technical field of communication, in particular to a configuration method for converting a USB (universal serial bus) into an Ethernet network card and network equipment.
Background
the USB-to-Ethernet network card is used for realizing the conversion between the Ethernet interface technology and the USB parallel bus interface technology, so that equipment without a network interface can be networked through the USB interface. The traditional USB to ethernet network card needs an external EEPROM (Electrically Erasable Programmable Read-Only Memory) chip to configure the product, which increases the product cost.
Disclosure of Invention
Therefore, it is necessary to provide a low-cost configuration method for converting USB to ethernet network cards, and also provide a network device.
A configuration method for converting USB to Ethernet network card, the said USB to Ethernet network card includes USB to Ethernet chip; the method comprises the following steps: setting an MAC address storage area on the USB-to-Ethernet chip; generating a static MAC address; the static MAC address is different from the inherent MAC address of the USB-to-Ethernet chip; and storing the static MAC address in the MAC address storage area and the MAC address register of the USB-to-Ethernet chip as the MAC address of the USB-to-Ethernet network card.
In one embodiment, the step of setting the MAC address storage area on the USB to ethernet chip specifically includes: and when the USB-to-Ethernet chip is not provided with the MAC address storage area, setting the MAC address storage area on the USB-to-Ethernet chip.
In one embodiment, the step of generating the static MAC address includes: acquiring an operation authority; and randomly generating a random value different from the inherent MAC address of the USB-to-Ethernet chip as the static MAC address.
in one embodiment, the step of storing the static MAC address in the MAC address storage area further includes, after the step of storing the static MAC address in the MAC address storage area: and setting the access authority of the MAC address storage area to be read-only.
In one embodiment, after the step of generating the static MAC address and before the step of storing the static MAC address in the MAC address storage area and the MAC address register of the USB-to-ethernet chip, the method further includes the steps of: zeroing the highest order bits of the static MAC address.
a network device comprises a main control chip and a USB-to-Ethernet network card; the USB-to-Ethernet network card comprises a USB-to-Ethernet chip; the main control chip is used for setting an MAC address storage area on the USB-to-Ethernet chip and generating a static MAC address; the static MAC address is different from the inherent MAC address of the USB-to-Ethernet chip; the main control chip is further configured to store the static MAC address in the MAC address storage area and the MAC address register of the USB to ethernet chip as the MAC address of the USB to ethernet network card.
in one embodiment, the master control chip further needs to acquire the operation permission of the USB-to-ethernet chip when generating the static MAC address; and the main control chip randomly generates a random value different from the inherent MAC address of the USB-to-Ethernet chip as the static MAC address after acquiring the operation authority.
In one embodiment, the main control chip is further configured to zero a highest bit of the static MAC address.
In one embodiment, the USB to ethernet network card further includes a USB interface module, an ethernet interface module, and a voltage transformation module; the USB interface module is connected with the USB-to-Ethernet chip; the USB interface module is used for being connected with USB interface equipment; the Ethernet interface module is used for being connected with an Ethernet transmission line; the voltage transformation module is connected between the USB-to-Ethernet chip and the Ethernet interface; the voltage transformation module is used for isolating external interference signals and providing bias voltage required by data transmission.
in one embodiment, a voltage conversion module is arranged in the USB-to-ethernet chip; the voltage conversion module is used for converting the input voltage of the USB-to-Ethernet chip into a target voltage, outputting the target voltage through an output pin and supplying power to the target pin on the USB-to-Ethernet chip.
According to the configuration method of the USB-to-Ethernet network card, the MAC address storage area is arranged on the USB-to-Ethernet chip, the static MAC address different from the inherent MAC address of the USB-to-Ethernet chip is generated, and then the static MAC address is stored in the MAC address storage area and the MAC address register of the USB-to-Ethernet chip and serves as the MAC address of the USB-to-Ethernet network card, and MAC address configuration of the USB-to-Ethernet network card is completed. Therefore, after the configuration method is adopted, the MAC address of the USB-to-Ethernet network card is configured without configuration equipment such as an external EEPROM chip and the like, so that the product cost is saved.
Drawings
FIG. 1 is a flowchart illustrating a configuration method for a USB-to-Ethernet network card according to an embodiment;
FIG. 2 is a block diagram of a network device in one embodiment;
FIG. 3 is a block diagram illustrating an embodiment of a USB-to-Ethernet network card;
FIG. 4 is a schematic circuit diagram of the USB-to-Ethernet chip and its surrounding circuitry shown in FIG. 3;
FIG. 5 is a schematic circuit diagram of the USB interface module of FIG. 3;
FIG. 6 is a schematic circuit diagram of the Ethernet interface module and the transformer module of FIG. 3;
FIG. 7 is a circuit schematic of the EEPROM configuration chip of FIG. 3;
fig. 8 and 9 are circuit schematic diagrams of the filter circuit in fig. 3.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Fig. 1 is a flowchart of a configuration method for a USB to ethernet network card in an embodiment. The USB-to-Ethernet network card comprises a USB-to-Ethernet chip and is used for completing the main functions of the USB-to-Ethernet network card. The configuration method comprises the following steps:
s110, setting a MAC address storage area on the USB-to-Ethernet chip.
In this embodiment, S110 is only executed when the USB to ethernet chip is not provided with the MAC address storage area. That is, the configuration method needs to be executed only when the MAC address of the USB to ethernet network card is read for the first time. Whether the reading is the first reading can be determined by determining whether the result of reading the MAC address of the USB to ethernet network card is empty, that is, the MAC address of the USB to ethernet network card is read first before S110 is executed, and S110 is executed if the reading result is empty. And establishing a MAC address storage file for storing the MAC address at a preset position. The set MAC address storage file is not eliminated after power failure.
And S120, generating a static MAC address.
the static MAC address generated should be different from the native MAC address of the USB to ethernet chip. Because the USB to ethernet chips are produced in batch, the inherent MAC addresses of the produced USB to ethernet chips are also the same, so that the inherent MAC addresses cannot be directly used as the MAC addresses of the USB to ethernet network cards. In one embodiment, before S120 is executed, the operation authority needs to be acquired. The static MAC address generated in the configuration process is used as a fixed MAC address of the USB-to-Ethernet network card, so that only a system or equipment with operation authority is allowed to operate the static MAC address, and the safety of the product is improved. After the operation authority is obtained, a random value different from the inherent MAC address of the USB-to-Ethernet chip is randomly generated to serve as the static MAC address.
S130, the static MAC address is stored in the MAC address storage area and the MAC address register of the USB-to-Ethernet chip and used as the MAC address of the USB-to-Ethernet network card.
after the static MAC address is stored in the MAC address storage area, the access authority of the MAC address storage area can be set to be read only, so that the MAC address of the USB-to-Ethernet network card is fixed after being generated. When the static MAC address is stored in the MAC address storage area, the static MAC address also needs to be stored in the MAC address register of the USB-to-ethernet chip. Therefore, whether the data is normally transmitted can be judged by judging whether the MAC address in the data packet is matched with the address of the MAC address register, such as whether the data is sent to a correct network device or whether the data is the target receiving data.
in one embodiment, after executing S120, the following step is executed before S130, and the highest position of the generated static MAC address is set to zero. The USB-to-Ethernet network card can be ensured to have better compatibility by zeroing the highest position of the static MAC address. After configuring the MAC address of the USB-to-ethernet network card, the network device may read the MAC address and establish a network connection with the MAC address.
According to the configuration method of the USB-to-Ethernet network card, the MAC address storage area is arranged on the USB-to-Ethernet chip, the static MAC address different from the inherent MAC address of the USB-to-Ethernet chip is generated, and then the static MAC address is stored in the MAC address storage area and the MAC address register of the USB-to-Ethernet chip and serves as the MAC address of the USB-to-Ethernet network card, and MAC address configuration of the USB-to-Ethernet network card is completed. The traditional USB-to-Ethernet network card needs an external EEPROM chip, and the EEPROM chip is directly configured with the MAC address, so that the MAC address on the EEPROM can be read as the MAC address of the USB-to-Ethernet network card when network connection is carried out. Obviously, after the configuration method is adopted, configuration equipment such as an external EEPROM chip and the like is not needed to configure the MAC address of the USB-to-Ethernet network card, so that the product cost is saved.
The invention also provides a network device which can be networked by utilizing the Ethernet network. A block diagram of the network device is shown in fig. 2. The network device includes a main control chip 210 and a USB to ethernet card 220. The USB to ethernet network card 220 includes a USB to ethernet chip for implementing the main functions of the USB to ethernet network card. The main control chip 210 is configured to execute the configuration method mentioned in the foregoing embodiment, so as to configure the MAC address of the USB to ethernet network card 220.
The main control chip 210 is used to set a MAC address storage area on the USB to ethernet chip. The main control chip 210 sets the MAC address storage area on the USB to ethernet chip only when the USB to ethernet chip is not set with the MAC address storage area. The main control chip 210 may determine whether the reading is the first reading by determining whether a result of reading the MAC address of the USB to ethernet network card is null, that is, the MAC address of the USB to ethernet network card is read first, and if the reading result is null, an MAC address storage area is set on the USB to ethernet network chip. The main control chip 210 may also establish a MAC address storage file for storing a MAC address at a preset location.
The main control chip 210 is further configured to generate a static MAC address after setting the MAC address storage area. The static MAC address generated should be different from the native MAC address of the USB to ethernet chip. Because the USB to ethernet chips are produced in batch, the inherent MAC addresses of the produced USB to ethernet chips are also the same, so that the inherent MAC addresses cannot be directly used as the MAC addresses of the USB to ethernet network cards. In an embodiment, the main control chip 210 further needs to obtain the operation right before generating the static MAC address. The static MAC address generated in the configuration process is used as a fixed MAC address of the USB-to-Ethernet network card, so that only a system or equipment with operation authority is allowed to operate the static MAC address, and the safety of the product is improved. After obtaining the operation authority, the main control chip 210 randomly generates a random value different from the inherent MAC address of the USB to ethernet chip as the static MAC address.
The main control chip 210 is further configured to store the generated static address in the MAC address storage area and the MAC address register of the USB to ethernet chip, as the MAC address of the USB to ethernet network card. After the static MAC address is stored in the MAC address storage area, the access authority of the MAC address storage area can be set to be read only, so that the MAC address of the USB-to-Ethernet network card is fixed after being generated. When the static MAC address is stored in the MAC address storage area, the static MAC address also needs to be stored in the MAC address register of the USB-to-ethernet chip. Therefore, whether the data is normally transmitted can be judged by judging whether the MAC address in the data packet is matched with the address of the MAC address register, such as whether the data is sent to a correct network device or whether the data is the target receiving data. In an embodiment, the master chip 210 may further zero the highest bit of the generated static MAC address and store the highest bit. The USB-to-Ethernet network card can be ensured to have better compatibility by zeroing the highest position of the static MAC address. Therefore, in the networking process, the configured MAC address of the USB-to-ethernet network card is used as the identification identifier of the network device, so that other network devices can identify the MAC address and establish network connection.
In the network device, the main control chip 210 sets an MAC address storage area on the USB-to-ethernet chip, generates a static MAC address different from the USB-to-ethernet chip, and then stores the static MAC address in the MAC address storage area and the MAC address register of the USB-to-ethernet chip, which is used as the MAC address of the USB-to-ethernet network card, thereby completing the MAC address configuration of the USB-to-ethernet network card. Therefore, the network equipment does not need configuration equipment such as an external EEPROM chip and the like to configure the MAC address of the USB-to-Ethernet network card, and the product cost is saved.
fig. 3 is a block diagram of an embodiment of a USB to ethernet network card 220. The USB to ethernet network card 220 includes a USB to ethernet chip 310, a USB interface module 320, an ethernet interface module 330, and a voltage transformation module 340.
the USB to ethernet chip 310 is used to implement the main functions of the USB to ethernet network card 220. The circuit schematic of the USB to ethernet chip 310 and its surrounding circuits is shown in fig. 4. The USB to ethernet chip 310 employs a USB2.0 ethernet chip SR6895U1 with high performance and low power consumption. The USB2.0 Ethernet chip SR6895U1 has the following technical characteristics:
1) compatible with USB1.1 and USB2.0 protocols;
2) A USB transceiver circuit and an SIE serial port control engine are integrated in the chip to support a USB HOST controller;
3) Supporting 480Mbps high-speed transmission; the compatible support of 12Mbps full-speed transmission;
4) the method supports the operations of suspension and remote awakening;
5) The power driving capability supports bus power supply and self-power supply modes;
6) Support 4 USB bus endpoints (control, interrupt, block transfer input, block transfer output endpoints);
7) A self-separation power saving mode is supported to obtain lower power consumption;
8) The network communication protocols such as IEEE802.3, IEEE802.3u, IEEE802.3x and the like are compatible;
9) The packet verification and automatic generation of IPv4TCP/IP/UDP/ICMP/IGMP, IPv6TCP/UDP/ICMPv6 and the like are supported;
10) Supporting half-duplex conflict pressure rollback flow control;
11) 10/100Mbps fast Ethernet PHY is built in;
12) A built-in TX/RX receiving and transmitting buffer;
13) VLAN ID filtering is supported;
14) the remote network awakening function is supported, and remote awakening is carried out through events such as network link state change, magic packet, Microsoft awakening packet and external awakening pin state change;
15) the network can be selected to have low power consumption or the PHY power supply can be switched off in the sleep mode;
16) and supporting functions of an external EEPROM configuration chip and an LED lamp are supported.
since the USB2.0 ethernet chip SR6895U1 has the characteristics of high performance and low power consumption, the entire USB to ethernet network card 220 also has the characteristics of high performance and low power consumption.
In this embodiment, the USB2.0 Ethernet chip SR6895U1 requires the support of an external 25MHz crystal oscillator Y1. The USB2.0 Ethernet chip SR6895U1 is integrated with a voltage conversion module. The voltage conversion module is used for converting the input voltage (3.3V) of the USB2.0 Ethernet chip SR6895U1 into a target voltage (1.8V), outputting the target voltage through the output pin and supplying power to the target pin of the USB2.0 Ethernet chip SR6895U1, so that a 3.3V1.8 LDO device (Low Dropout Regulator) does not need to be arranged outside the USB2.0 Ethernet chip SR6895U 1. Referring to fig. 4, PIN3, PIN9 of USB2.0 ethernet chip SR6895U1 require analog or digital 3.3V input, PIN17, PIN22, PIN27 require digital 3.3V input; the PIN23 PIN is an internally converted 1.8V output, so that the 1.8V can be directly output to the PINs 19, 31 and 25 of the chip, and a 3.3V1.8 LDO device can be saved in product design. Of course, for some on-board circuits, if the layout is far away, the 1.8V power supply can be provided directly from the outside to ensure the normal operation of the chip.
The USB interface module 320 is used to connect with a USB interface device. The USB interface module 320 is also connected to the USB to ethernet chip 310. Fig. 5 is a schematic circuit diagram of the USB interface module 320 according to an embodiment. The USB interface module 320 includes a USB interface P1 and a DCDC chip U3. The D +/D-pin of the USB interface P1 is connected with the USB2.0 Ethernet chip SR6895U 1. The USB interface P1 is externally connected with a reference resistor of 300 ohms and is used as a reference resistor of the USB PHY. The DCDC chip U3 adopts SY8088 chip. Compared with the traditional LDO chip, the SY8088 chip has higher efficiency. The efficiency of the SY8088 chip is about 95%, and the efficiency of LDO (such as LM1117) is about 70-80%. Because SY8088 has higher efficiency, the temperature of the whole network card can be reduced. After DCDC conversion, the voltage output by the SY8088 chip is 0.6 × 3.33V (1+150K/33K), which is the main power supply of SR6895U 1.
the ethernet interface module 330 is used to connect with an ethernet transmission line. The ethernet interface module 330 is connected to SR6895U1 through the voltage transformation module 340, see fig. 6. Ethernet interface module 330 includes RJ45 interface CON 1. RX +/RX-of the RJ45 interface CON1 is used for receiving externally transmitted data, and TX +/TX-is used for transmitting data to the network side. The ethernet interface module 330 mainly implements external network data transmission. The transformation module 340 includes a transformer U5. The transformer U5 is used for isolating external interference signals, so that the chip can be prevented from being damaged by lightning strike, surge and the like. Meanwhile, the transformer U5 can eliminate the adverse burr effect of some analog power supplies. Moreover, the transformer U5 can also provide a bias voltage (3.3V) required for data transmission, thereby providing transmission power to meet the requirement of external information integrity.
in an embodiment, the USB to ethernet network card 220 may further include an EEPROM configuration chip 350 and a filter circuit 360. The circuit principle of the EEPROM configuration chip 350 is shown in fig. 7 (U2 in fig. 7), which is used to connect with an external EEPROM chip, so as to configure the MAC address of the USB to ethernet card 220 through the external EEPROM chip. Specifically, EECS, EESK and EEDIO are used to connect external lines, EECS is used to select chip and select external EEPROM chip. EESK is EEPROM control protocol clock signal, EEDIO is data transmission port for data input and output. Therefore, the EEPROM configuration chip U2 can be used for MAC address configuration through the EEPROM chip, so that various MAC address configuration modes can be provided for users to select. The filter circuit 360 is used for filtering as shown in fig. 8 and 9.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
the above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A configuration method for converting USB to Ethernet network card, the said USB to Ethernet network card includes USB to Ethernet chip; characterized in that the method comprises:
Setting an MAC address storage area on the USB-to-Ethernet chip;
Acquiring operation authority, and generating a static MAC address, wherein the static MAC address is different from an inherent MAC address of the USB-to-Ethernet chip; and
And storing the static MAC address in the MAC address storage area and the MAC address register of the USB-to-Ethernet chip as the MAC address of the USB-to-Ethernet network card.
2. the method according to claim 1, wherein the step of setting the MAC address storage area on the USB to ethernet chip specifically comprises: and when the USB-to-Ethernet chip is not provided with the MAC address storage area, setting the MAC address storage area on the USB-to-Ethernet chip.
3. The method of claim 1, wherein the step of generating the static MAC address comprises:
And randomly generating a random value different from the inherent MAC address of the USB-to-Ethernet chip as the static MAC address.
4. The method of claim 1, wherein the step of storing the static MAC address in the MAC address storage area and a MAC address register of the USB to ethernet chip is further followed by:
And setting the access authority of the MAC address storage area to be read-only.
5. the method of claim 1, wherein after the step of generating the static MAC address and before the step of storing the static MAC address in the MAC address storage area and the MAC address register of the USB to ethernet chip, further comprising the steps of: zeroing the highest order bits of the static MAC address.
6. A network device comprises a main control chip and a USB-to-Ethernet network card; the USB-to-Ethernet network card comprises a USB-to-Ethernet chip; the main control chip is used for setting an MAC address storage area on the USB-to-Ethernet chip, acquiring operation authority and generating a static MAC address, wherein the static MAC address is different from an inherent MAC address of the USB-to-Ethernet chip; the main control chip is further configured to store the static MAC address in the MAC address storage area and the MAC address register of the USB to ethernet chip as the MAC address of the USB to ethernet network card.
7. The network device of claim 6, wherein the master chip randomly generates a random value different from the inherent MAC address of the USB to ethernet chip as the static MAC address after obtaining the operation authority.
8. The network device of claim 6, wherein the host chip is further configured to zero a highest bit of the static MAC address.
9. The network device of claim 6, wherein the USB to ethernet network card further comprises a USB interface module, an ethernet interface module, and a voltage transformation module; the USB interface module is connected with the USB-to-Ethernet chip; the USB interface module is used for being connected with USB interface equipment; the Ethernet interface module is used for being connected with an Ethernet transmission line; the voltage transformation module is connected between the USB-to-Ethernet chip and the Ethernet interface; the voltage transformation module is used for isolating external interference signals and providing bias voltage required by data transmission.
10. The network device according to claim 6, wherein a voltage conversion module is disposed in the USB-to-ethernet chip; the voltage conversion module is used for converting the input voltage of the USB-to-Ethernet chip into a target voltage, outputting the target voltage through an output pin and supplying power to the target pin on the USB-to-Ethernet chip.
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