CN108647166B - Microblaze-based conversion method for USB interface data and CAN interface data - Google Patents
Microblaze-based conversion method for USB interface data and CAN interface data Download PDFInfo
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- CN108647166B CN108647166B CN201810375746.9A CN201810375746A CN108647166B CN 108647166 B CN108647166 B CN 108647166B CN 201810375746 A CN201810375746 A CN 201810375746A CN 108647166 B CN108647166 B CN 108647166B
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 210000001503 joint Anatomy 0.000 claims description 3
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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
- G06F13/382—Information transfer, e.g. on bus using universal interface adapter
- G06F13/385—Information transfer, e.g. on bus using universal interface adapter for adaptation of a particular data processing system to different peripheral devices
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2213/00—Indexing scheme relating to interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F2213/38—Universal adapter
- G06F2213/3812—USB port controller
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2213/00—Indexing scheme relating to interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F2213/38—Universal adapter
- G06F2213/3852—Converter between protocols
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Abstract
The invention discloses a method for converting USB interface data and CAN interface data based on Microblaze, relating to the field of data communication; the USB interface data exchange system is characterized in that a Microblaze core in the FPGA is used for driving plug-in equipment and configuring a mounted CAN IP core according to the configuration parameters of an application software CAN interface of an upper computer, a USB asynchronous control module reads and sends data through an FIFO of an interface chip to communicate with the upper computer, the conversion function of the USB interface data and the CAN interface data CAN be realized by utilizing the recombined FPGA, corresponding additional settings are reduced, and the USB interface data exchange system is more favorably applied to an information control center, a call center, a securities/financial transaction system, a bank data center, an industrial control environment, a teaching environment, a test center, automobile electronics and other environments needing data exchange of a USB-to-CAN interface.
Description
Technical Field
The invention discloses a data conversion method, relates to the field of data communication, and particularly relates to a method for converting USB interface data and CAN interface data based on Microblaze.
Background
In the prior art, CAN data exchange is realized by a single chip microcomputer and SJA1000, data analysis is carried out by simulating a CAN controller through an IO port of the single chip microcomputer, and an upper computer CAN communicate with a CAN interface after data conversion is carried out on the single chip microcomputer after a USB is converted into a serial port, so that the CAN data exchange is very inconvenient in practical application. The invention provides a conversion method of USB interface data and CAN interface data based on Microblaze, wherein a Microblaze core in FPGA is used for realizing the drive of plug-in equipment and configuring a mounted CAN IP core according to the configuration parameters of an application software CAN interface of an upper computer, a USB asynchronous control module reads and sends data through FIFO of an interface chip to communicate with the upper computer, the conversion function of the USB interface data and the CAN interface data CAN be realized by utilizing the recombined FPGA, and the conversion method reduces corresponding extra settings, and is more favorable for being applied to information control centers, call centers, securities/financial transaction systems, bank data centers, industrial control environments, teaching environments, test centers, automotive electronics and other environments needing data exchange of a USB-to-CAN interface.
Disclosure of Invention
The invention provides a method for converting USB interface data and CAN interface data based on Microblaze, aiming at the problems in the prior art.
The specific scheme provided by the invention is as follows:
a method for converting USB interface data and CAN interface data based on Microblaze comprises mounting a CAN module and a USB asynchronous control module by using a Microblaze core embedded in FPGA, connecting the USB asynchronous control module to an upper computer via an interface chip,
microblaze verifies the drive of the mounting equipment, configures the CAN module according to the CAN interface configuration parameters of the upper computer, sends data, acquires data from the CAN module according to the data request command sent by the upper computer, and exchanges data with the upper computer through the interface chip, so that the conversion between USB interface data and CAN interface data is realized.
The method comprises the following specific steps:
an FPGA is built, a CAN module and a USB asynchronous control module are mounted by utilizing a Microblaze core embedded in the FPGA, the USB asynchronous control module is connected with an interface chip,
the interface chip is connected with an upper computer, the CAN module is in butt joint with the CAN interface host,
the upper computer opens application software, configures CAN working mode parameters, transmits the CAN working mode parameters and data to be transmitted to the CAN interface host computer through the interface chip, the USB asynchronous control module, the Microblaze core and the CAN module in sequence, and the CAN interface host computer transmits the data back to the upper computer, so that conversion of the USB interface data and the CAN interface data is realized.
A conversion system of USB interface data and CAN interface data based on Microblaze comprises an FPGA of an embedded Microblaze core, wherein the FPGA of the embedded Microblaze core is used for mounting a CAN module and a USB asynchronous control module, the USB asynchronous control module is connected with an upper computer through an interface chip,
microblaze verifies the drive of the mounting equipment, configures the CAN module according to the CAN interface configuration parameters of the upper computer, sends data, acquires data from the CAN module according to the data request command sent by the upper computer, and exchanges data with the upper computer through the interface chip, so that the conversion between USB interface data and CAN interface data is realized.
The CAN module in the system comprises a CAN IP core and a CAN PHY IOBS, and the CAN IP core is directly mounted on the Microblaze core.
The USB asynchronous communication control module in the system comprises 4 controllers which are respectively a control register, a state register, a sending register and a receiving register.
The system also comprises a FLASH controller, and a firmware program is stored in the peripheral equipment for controlling.
The system also comprises a DDR3 controller which is used for data buffering and inputting of a program after power-on.
The invention has the advantages that:
the invention provides a conversion method of USB interface data and CAN interface data based on Microblaze, wherein a Microblaze core in FPGA is used for realizing the drive of plug-in equipment and configuring a mounted CAN IP core according to the configuration parameters of an application software CAN interface of an upper computer, a USB asynchronous control module reads and sends data through FIFO of an interface chip to communicate with the upper computer, the conversion function of the USB interface data and the CAN interface data CAN be realized by utilizing the recombined FPGA, and the method reduces corresponding additional settings, and is more favorable for being applied to information control centers, call centers, securities/financial transaction systems, bank data centers, industrial control environments, teaching environments, test centers, automotive electronics and other environments needing data exchange of a USB-to-CAN interface.
Drawings
FIG. 1 is a block diagram of the system of the present invention.
FIG. 2 is a schematic flow diagram of the process of the present invention.
Detailed Description
The invention provides a method for converting USB interface data and CAN interface data based on Microblaze, which utilizes a Microblaze core embedded in FPGA to mount a CAN module and a USB asynchronous control module, wherein the USB asynchronous control module is connected with an upper computer through an interface chip,
microblaze verifies the drive of the mounting equipment, configures the CAN module according to the CAN interface configuration parameters of the upper computer, sends data, acquires data from the CAN module according to the data request command sent by the upper computer, and exchanges data with the upper computer through the interface chip, so that the conversion between USB interface data and CAN interface data is realized.
Meanwhile, a conversion system of USB interface data and CAN interface data based on Microblaze corresponding to the method is provided, which comprises an FPGA of an embedded Microblaze core, wherein the Microblaze core embedded in the FPGA is used for mounting a CAN module and a USB asynchronous control module, the USB asynchronous control module is connected with an upper computer through an interface chip,
microblaze verifies the drive of the mounting equipment, configures the CAN module according to the CAN interface configuration parameters of the upper computer, sends data, acquires data from the CAN module according to the data request command sent by the upper computer, and exchanges data with the upper computer through the interface chip, so that the conversion between USB interface data and CAN interface data is realized.
The invention is further described with reference to the accompanying drawings and specific embodiments.
In the system of the invention, a Microblaze core embedded in the FPGA carries a CAN module and a USB asynchronous control module through an AXI bus, the USB asynchronous control module is connected with an upper computer through an interface chip,
wherein the CAN module comprises a CAN IP core and a CAN PHY IOBS, the CAN IP core is directly mounted on the Microblaze core, the CAN PHY IOBS is a physical layer component of the CAN module and is connected with a CAN host,
the USB asynchronous control module mainly comprises 4 controllers: a control register, a status register, a sending register, a receiving register,
the control register is used for controlling and determining the operation mode of the USB asynchronous control module and the characteristics of the current execution task, the status register is used for storing various status information of the current instruction execution result and storing control information, the sending register and the receiving register are used for storing the address of data,
the USB asynchronous control module is connected with a host computer through an interface chip, taking a CY7C68013A chip of an EZ-USB FX2LP series of Cypress company as an example, in a firmware program of the CY7C68013, FIFOs of EP2 and EP4 are configured to be used as data output, data are transmitted from the host computer to the system, FIFOs of EP6 and EP8 are configured to be used as data input, data are transmitted from the system to the host computer, the size of each port FIFO is 1 Kbyte,
the Microblaze core of the FPGA is also provided with a FLASH controller and a DDR3 controller, the FLASH controller is used for controlling peripheral equipment to store a firmware program, the DDR3 controller is connected with DDR3 particles and is used for carrying out data caching and inputting a program after power-on,
microblaze verifies the drive of the mounting equipment, configures the CAN module according to the CAN interface configuration parameters of the upper computer, sends data, acquires data from the CAN module according to the data request command sent by the upper computer, and exchanges data with the upper computer through the interface chip, so that the conversion between USB interface data and CAN interface data is realized.
According to the system, the method provided by the invention comprises the following specific steps:
an FPGA is built, a CAN IP core and a USB asynchronous control module of a CAN module are mounted by utilizing a Microblaze core embedded in the FPGA through an AXI bus, the USB asynchronous control module is connected with a CY7C68013A chip,
the CY7C68013A chip is connected with an upper computer, the CAN PHY IOBS of the CAN module is butted with a CAN interface host,
the upper computer opens application software, configures CAN working mode parameters, transmits the CAN working mode parameters and data to be transmitted to the CAN interface host computer through the CY7C68013A chip, the USB asynchronous control module, the Microblaze core and the CAN module in sequence, and the CAN interface host computer transmits data back to the upper computer to realize conversion of the USB interface data and the CAN interface data.
The data CAN be read on the upper computer and then is consistent with the CAN interface.
The method and the system are suitable for data exchange environments needing USB type data conversion CAN interface data, such as an information control center, a call center, a security/financial transaction system, a bank data center, an industrial control environment, a teaching environment, a test center, automotive electronics and the like.
Claims (6)
1. A method for converting USB interface data and CAN interface data based on Microblaze is characterized in that a CAN module and a USB asynchronous control module are mounted by utilizing a Microblaze core embedded in an FPGA, the USB asynchronous control module is connected with an upper computer through an interface chip,
the Microblaze checks the drive of the mounted equipment, configures the CAN module according to CAN interface configuration parameters of the upper computer and sends data, acquires data from the CAN module according to a data request command sent by the upper computer and exchanges the data with the upper computer through the interface chip, wherein the CAN module is in butt joint with the CAN interface host, application software is opened on the upper computer, CAN working mode parameters are configured, the CAN working mode parameters and the data to be sent are transmitted to the CAN interface host through the interface chip, the USB asynchronous control module, the Microblaze core and the CAN module in sequence, and the CAN interface host transmits the data back to the upper computer, so that the conversion between the USB interface data and the CAN interface data is realized.
2. A conversion system of USB interface data and CAN interface data based on Microblaze is characterized by comprising an FPGA of an embedded Microblaze core, wherein the FPGA of the embedded Microblaze core is used for mounting a CAN module and a USB asynchronous control module, the USB asynchronous control module is connected with an upper computer through an interface chip,
the Microblaze checks the drive of the mounted equipment, configures the CAN module according to CAN interface configuration parameters of the upper computer and sends data, acquires data from the CAN module according to a data request command sent by the upper computer and exchanges the data with the upper computer through the interface chip, wherein the CAN module is in butt joint with the CAN interface host, application software is opened on the upper computer, CAN working mode parameters are configured, the CAN working mode parameters and the data to be sent are transmitted to the CAN interface host through the interface chip, the USB asynchronous control module, the Microblaze core and the CAN module in sequence, and the CAN interface host transmits the data back to the upper computer, so that the conversion between the USB interface data and the CAN interface data is realized.
3. The system of claim 2, wherein the CAN module comprises a CAN IP core and a CAN PHY IOBS, the CAN IP core being mounted directly on the Microblaze core.
4. The system as claimed in claim 2 or 3, wherein the USB asynchronous communication control module comprises 4 kinds of controllers, which are a control register, a status register, a transmission register, and a reception register.
5. The system of claim 4, further comprising a FLASH controller for controlling the peripheral device to store the firmware program.
6. The system of any of claims 2, 3 or 5, further comprising a DDR3 controller for data buffering and input of a power-up procedure.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201075248Y (en) * | 2007-08-27 | 2008-06-18 | 中国石油天然气集团公司 | USB interface real-time data acquisition controller |
| CN103092800A (en) * | 2013-01-18 | 2013-05-08 | 西安电子科技大学 | Data conversion experimental platform |
| CN205864441U (en) * | 2016-08-08 | 2017-01-04 | 浪潮集团有限公司 | Ethernet-to-CAN (controller area network) module based on Microblaze verification |
| CN107819705A (en) * | 2017-11-28 | 2018-03-20 | 济南浪潮高新科技投资发展有限公司 | A kind of implementation method of the data exchange based on Microblaze cores |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0818239D0 (en) * | 2008-10-06 | 2008-11-12 | Omiino Ltd | System for internally monitoring an intergrated circuit |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201075248Y (en) * | 2007-08-27 | 2008-06-18 | 中国石油天然气集团公司 | USB interface real-time data acquisition controller |
| CN103092800A (en) * | 2013-01-18 | 2013-05-08 | 西安电子科技大学 | Data conversion experimental platform |
| CN205864441U (en) * | 2016-08-08 | 2017-01-04 | 浪潮集团有限公司 | Ethernet-to-CAN (controller area network) module based on Microblaze verification |
| CN107819705A (en) * | 2017-11-28 | 2018-03-20 | 济南浪潮高新科技投资发展有限公司 | A kind of implementation method of the data exchange based on Microblaze cores |
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