CN103607286B - Multi-functional communication interface machine device based on PowerPC embedded systems - Google Patents
Multi-functional communication interface machine device based on PowerPC embedded systems Download PDFInfo
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- CN103607286B CN103607286B CN201310614291.9A CN201310614291A CN103607286B CN 103607286 B CN103607286 B CN 103607286B CN 201310614291 A CN201310614291 A CN 201310614291A CN 103607286 B CN103607286 B CN 103607286B
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Abstract
The present invention relates to a kind of multi-functional communication interface machine device.A kind of multi-functional communication interface machine device based on PowerPC embedded systems, including CPU core core, motherboard, interface board and power module, wherein CPU core core carry PowerPC embedded systems processing device；Mainboard of the motherboard as the device, mainly including CPLD circuit, extended serial port circuit, bus level change-over circuit, RTC clock circuit and CAN interface circuit and 422/485 interface circuit；Interface board includes CAN interface plate, 422/485 interface board；The CPU core core is connected with bus level change-over circuit on motherboard, is connected after level conversion with CPLD circuit, extended serial port circuit and RTC clock circuit, and CPLD circuit is connected by the bus of address and data time division multiplexing mode with CAN interface circuit；Extended serial port circuit uses 4 passage asynchronism transceiver STC16C554 chips, and the extension serial line interface of 4 tunnel 232 connects 422/485 interface circuit；The CAN interface plate, 422/485 interface board are connected with CAN interface circuit on motherboard and 422/485 interface circuit respectively.
Description
Technical field
The present invention relates to a kind of multi-functional communication interface machine device, and the embedded systems of PowerPC are based on more particularly, to one kind
The multi-functional communication interface machine equipment of system, for realizing that the data between Ethernet and CAN-bus, Ethernet and serial communication turn
Change.
Background technology
With the fast development of railway traffic, Railway Security seems more prominent.And various signal detection apparatus and
The input of monitor and control facility, higher requirement even more is proposed to the communication capacity of railway signal microcomputer detecting system.Due to signal
CAN interface number of devices is connected in centralized monitoring system to be stepped up, and uses the CAN expansion cards of ISA and PC104 types at present
Expansion slot position deficiency on industrial computer is limited to, in addition as the increase of Contents for Monitoring, amount of communication data increase severely, machine of standing is to number in real time
It is many according to the burden increase of collection.In order to solve the above problems, active demand is a kind of based on more CAN mouths, Multi-serial port to Ethernet
The communication interface machine equipment of interface.
The content of the invention
The problem of being proposed for background technology, the present invention propose a kind of based on the multi-functional of PowerPC embedded systems
Communication interface machine device, CAN-bus networks, serial communication and the interconnection and interflow of EtherNet networks can be easily accomplished, expanded
The scope of CAN-bus networks and serial communication network.
To achieve these goals, the technical solution adopted in the present invention is：
A kind of multi-functional communication interface machine device based on PowerPC embedded systems, including CPU core core, motherboard, connect
Oralia and power module, wherein CPU core core carry PowerPC embedded systems processing device and network interface circuit；Motherboard
As the mainboard of the device, mainly include CPLD circuit part, extended serial port circuit part, bus level conversion circuit part,
RTC clock circuit part and CAN interface circuit part and 422/485 interface circuitry portions；The interface board includes CAN interface
Plate, 422/485 interface board and indicator lamp interface board, to complete the extension of interface and safeguard function；The CPU core core and mother
Bus level conversion circuit part connects on plate, electric with CPLD circuit, extended serial port circuit and RTC clock after level conversion
Road is connected, and address bus and the general line system of data/address bus independent mode are that address and data are time-multiplexed by CPLD circuit part
It is connected after the bus of mode with CAN interface circuit, extended serial port circuit uses 4 passage asynchronism transceiver STC16C554 chips, expands
Open up the serial line interface of 4 tunnel 232 and connect 422/485 interface circuit；The CAN interface plate is connected with CAN interface circuit on motherboard；It is described
422/485 interface circuit of 422/485 interface board and motherboard connects；Power module is designed using 5V Switching Power Supplies, is that system is each
Module provides working power.
The described multi-functional communication interface machine device based on PowerPC embedded systems, CAN interface plate are controlled including CAN
Device chip SJA1000 processed and general CAN isolated transceivers CTM8251T, the CAN controller chip isolate transmitting-receiving with general CAN
Device connects；General CAN isolated transceivers controlled connection integrates 2 CAN in the CAN interface circuit on motherboard, every block of CAN interface plate
Passage.
The described multi-functional communication interface machine device based on PowerPC embedded systems, sets in each CAN Channel front ends
There are the anti-lightning strike protection of gas-discharge tube, the protection of transient suppressor Anti-surging and CAN common-mode filters suppression common mode interference three-level
Protection circuit.
The described multi-functional communication interface machine device based on PowerPC embedded systems, 422/485 interface board are selected
ADM2587EBRWZ chips, the 485/422 chip ADM2587EBRWZ controlled connections are in the 422/485 interface electricity on motherboard
Road；Every piece of 422/485 interface board integrates 2 serial ports passages.ADM2587/2E is the height that ADI companies release after ADM2483
The performance single supply completely isolated chip of type 485/422, built-in chip type DC-DC power source, Magnetic isolation passage, full duplex RS485
Transceiver.
The described multi-functional communication interface machine device based on PowerPC embedded systems, in each serial ports Channel front end
Provided with the anti-lightning strike protection of gas-discharge tube, transient suppressor Anti-surging two-stage protection circuit.
The described multi-functional communication interface machine device based on PowerPC embedded systems, the network on CPU core core connect
Mouth circuit is made up of 2 network extended chip RTL8201CP and its peripheral circuit, to realize the net of CPU core core and computer
Network is connected, and the network extended chip RTL8201CP is connected with CPU core core, and the network extended chip RTL8201CP passes through
Hardware configuration lever selection when peripheral circuit realizes electric on network chip.
The beneficial good effect of invention：
1st, the multi-functional communication interface machine device of the invention based on PowerPC embedded systems, there is provided one kind is based on
Ethernet and CAN-bus, Ethernet and serial communication data conversion equipment are realized on PowerPC embedded system platforms, is realized
Ethernet and CAN-bus, Ethernet and serial communication data translation function.Using high performance embedded microcontroller, mark
Quasi- kind of interface is more, not converted, can be communicated with the device of variety classes interface；CAN, serial ports and ether Netcom are merged
Letter, conventional communication loop extension bottleneck is eliminated, there is good application prospect.
2nd, the multi-functional communication interface machine device based on PowerPC embedded systems of the invention, it is simple that external circuit sets juice,
Working frequency is high, and the speed of service is fast；CAN interface, 422/485 interface baud rate are arbitrarily set by software programmable, have compared with
Strong flexibility；CAN, 422/485 data and the two-way transparent transmission mode of Ethernet data, the need of different user can be met
Will.
3rd, the multi-functional communication interface machine device of the invention based on PowerPC embedded systems, it is embedded by PowerPC
The high-speed interrupt handling ability and data group package processing capability of system, row buffering and pre- is entered to upstream data and downgoing control signal
Processing, can preferably solve abnormal problem that communicates, improve the flexibility of system, also reduce centralized monitoring system station machine pair
The burden of real-time data acquisition.
4th, the multi-functional communication interface machine device of the invention based on PowerPC embedded systems, in CAN interface, 422/485
Interface front end increases three-level protection circuit：Gas-discharge tube carries out lightning Protection；Transient suppressor carries out carrying out surge protection；Common mode is filtered
Ripple device suppression common mode is disturbed；Pass through three-level protection circuit, it can be ensured that the safety of channel unit.
Brief description of the drawings
Fig. 1 is the schematic block circuit diagram of the present invention.
Fig. 2 is CAN interface circuit part schematic diagram in the present invention.
Fig. 3 is serial interface circuit part schematic diagram in the present invention.
Embodiment
Below by embodiment, technical scheme is described in further detail.
Embodiment 1
Referring to Fig. 1, the multi-functional communication interface machine device of the invention based on PowerPC embedded systems, including core cpu
Plate, motherboard, interface board and power module, wherein CPU core core carry PowerPC embedded systems processing device and network interface
Circuit；Mainboard of the motherboard as the device, mainly include CPLD circuit part, extended serial port circuit part, bus level conversion
Circuit part, RTC clock circuit part and CAN interface circuit part and 422/485 interface circuitry portions；The interface board bag
CAN interface plate, 422/485 interface board and indicator lamp interface board are included, to complete the extension of interface and safeguard function；The CPU
Core board is connected with bus level change-over circuit on motherboard, after level conversion with CPLD circuit, extended serial port circuit and RTC
Clock circuit connects, when address bus and the general line system of data/address bus independent mode are address and data by CPLD circuit part
It is connected after dividing the bus of multiplex mode with CAN interface circuit, extended serial port circuit uses 4 passage asynchronism transceiver STC16C554
Chip, the extension serial line interface of 4 tunnel 232 connect 422/485 interface circuit；The CAN interface plate connects with CAN interface circuit on motherboard
Connect；The 422/485 interface circuit connection of 422/485 interface board and motherboard；Power module is designed using 5V Switching Power Supplies, is
Each module of system provides working power.
As shown in figure 1, multi-functional communication interface machine device of the present embodiment based on PowerPC embedded systems, inside collection
Into 6 road CAN-bus interfaces, 9 road serial communication interfaces and two-way EtherNet interfaces and ICP/IP protocol stack, Yong Huli
CAN-bus networks, serial communication and the interconnection and interflow of EtherNet networks can be easily accomplished with it, has further expanded CAN-
The scope of bus networks and serial communication network.Meanwhile the high-speed interrupt handling energy that the equipment passes through PowerPC embedded systems
Power and data group package processing capability, row buffering and pretreatment are entered to upstream data and downgoing control signal, can preferably solve to lead to
Believe abnormal problem, improve the flexibility of system, also reduce burden of the centralized monitoring system station machine to real-time data acquisition.
Embodiment 2
Referring to Fig. 1, Fig. 2.The multi-functional communication interface machine device based on PowerPC embedded systems of the present embodiment, with
The difference of embodiment 1 is：CAN interface plate uses interface circuit as shown in Figure 2, including CAN controller chip
SJA1000 and general CAN isolated transceivers CTM8251T, the CAN controller chip are connected with general CAN isolated transceivers；
For general CAN isolated transceivers controlled connection in the CAN interface circuit on motherboard, every block of CAN interface plate integrates 2 CAN passages, complete
Into safeguard function, isolation features, protocol conversion function etc..
When it is implemented, being needed for equipment safety, it is anti-lightning strike gas-discharge tube can be provided with each CAN Channel front ends
Protection, the protection of transient suppressor Anti-surging and CAN common-mode filters suppression common mode interference three-level protection circuit.Wherein, use
Gas-discharge tube carries out lightning Protection；Carrying out surge protection is carried out using transient suppressor；Done using CAN common-mode filter suppression common modes
Disturb.
Embodiment 3, embodiment 4
Referring to Fig. 1-Fig. 3, the dress of the multi-functional communication interface machine based on PowerPC embedded systems of this two embodiments
Put, its difference respectively with embodiment 1 and embodiment 2 is：422/485 interface board uses interface circuit as shown in Figure 3.Institute
State interface circuit and select ADM2587EBRWZ chips, the ADM2587EBRWZ chips controlled connection is in 422/485 on motherboard
Interface circuit.Every piece of 422/485 interface board integrates 2 serial ports passages, completes safeguard function, isolation features, protocol conversion function
Deng.
ADM2587/2E is the completely isolated type 485/422 of high-performance univoltage that ADI companies release after ADM2483
Chip.Built-in chip type DC-DC power source, Magnetic isolation passage, full duplex RS485 transceivers, it is logical thoroughly to solve RS485 isolation
The problem of believing external DC-DC module.
Similarly, being protected for equipment safety needs, and can increase two-stage protection circuit in each serial ports Channel front end：1st, gas
Body discharge tube carries out lightning Protection；2nd, transient suppressor carries out carrying out surge protection.
Embodiment 5
The multi-functional communication interface machine device based on PowerPC embedded systems of the present embodiment, with foregoing embodiments
Unlike：Network interface circuit on CPU core core is made up of 2 network extended chip RTL8201CP and its peripheral circuit,
To realize the network connection of CPU core core and computer, convenience is downloaded from CPU or the network connection with outside.Institute
State network extended chip RTL8201CP to be connected with CPU core core, RTL8201CP realizes electric on network chip by peripheral circuit
When hardware configuration lever selection.
Multi-functional communication interface machine device of the invention based on PowerPC embedded systems, CPU core core（CPU and its outer
Enclose circuit）Bag expands CPU, SDRAM, FLASH, real-time clock, cpu clock, cpu power, 2 road Ethernet chips, Yi Jiyu
The connector of bottom plate（Using 1.27MM spacing connectors）；Realize and the intelligence interface of whole hardware is extended and to important information
Storage etc..
Cpu power provides 3.3V power supplys and 1.5V power supplys, externally fed 3.3V for this plate.
SDRAM, FLASH part provide the internal memory and memory space circuit of system operation needs for core board.Wherein DRAM
Using 2 HY57V561620FTP-H-C, design capacity 64M.Used as CPU core core data storage.FLASH is used
A piece of JS28F128J3D75, design capacity 16M.Used as CPU core core program storage.
Interface circuitry portions on motherboard include CF card interfaces, CAN interface plate interface, the interface plate interfaces of 422 485 etc..It is female
The function that plate is mainly completed has：The distribution of system bus port address；The distribution of system bus interrupt source；Piece selects and interrupt logic
The realization of circuit and bus control logic circuit；To CPU board（Core board）, CAN interface plate, 422/485 interface board, indicator lamp connect
Oralia, CF cards provide connectivity port.
Interface board mainly completes extension and the safeguard function of interface.
Multi-functional communication interface machine device of the invention based on PowerPC embedded systems, CPU core core, which carries, to fly to think card
Your MPC8247 PowerPC embedded systems processing device, software can be carried out using communication interface machine on linux system
Exploitation design, by running linux operating systems on the platform and completing the processing and calculating of data.Its software section bag
Include U-BOOT transplanting；The transplanting of linux system kernel；External interface driver；Four parts of application program.
The external interface driver of software section includes CAN interface driver and serial ports driver.
CAN drivers are responsible for completing the data communication between linux kernel and sja1000, i.e. linux kernel is set
Sja1000 control register, read-write sja1000 is received, transmission buffer.Application program part be responsible for complete user's space and
The data exchange of kernel spacing, and the message that analysis receives from sja1000, encapsulation will send message.
Device driver is made up of one group of data structure and function in linux, and it includes the sub- journey of device service
Sequence (such as open, read, write, close, ioctl), initialization function can_init () and interrupt handling routine can_
interrupt()。
Can_init () is called in linux loading can drivings, registers equipment to operating system, while complete can buses
The setting of baud rate, the setting of id filters, empty reception and send the work such as buffering area, opens interrupters, after completing initialization,
Reset mode is exited, into normal mode of operation.Read reads data from buffering area is received；Write writes to buffering area is sent
Personal data；Release closes can controllers；Ioctl sends out operational order various to can controllers, including sets sja1000
Bus baud rate, id filters etc.；Open opens can controllers, and uses function request_irq () to system application
Interrupt, and it is can_interrupt () to set interrupt handling routine, when any position of sja1000 internal interrupt registers (ir)
When being set to 1, int pin low levels are effective, call its interrupt processing function can-interrupt (), in being read in the function
Disconnected control register, judge interruption source (receive interrupt, send interruptions, fault interrupt, data overflow interruption, wake-up interrupts),
So as to call corresponding service subprogram.
Sja1000 read operation programs：
base = ioremap(f6000000, 0x20);
unsigned char read_can_reg(unsigned char *base,unsigned char reg )
{
unsigned char value;
writeb(reg,base);
value = readb(base+0x40);
return(value);
}
Writeb (reg, base) simulates ale latch addresses, hair address signal reg, and base is known by hardware design circuit
This will draw high address latch signal ale；Then, reg has been sent on multiplex bus；Then, readb (base+ are passed through
The data on the reg of address 0x40) are read, base will drag down ale, and reg is latched；Then, data is sent to multiplex bus
On, also just read the data in the address reg meanings space being latched.
Claims (7)
1. a kind of multi-functional communication interface machine device based on PowerPC embedded systems, including CPU core core, motherboard, interface
Plate and power module, it is characterised in that：Wherein CPU core core carries PowerPC embedded systems processing device and network interface
Circuit；Mainboard of the motherboard as the device, mainly including CPLD circuit, extended serial port circuit, bus level change-over circuit,
RTC clock circuit and CAN interface circuit and 422/485 interface circuit；The interface board connects including CAN interface plate, 422/485
Oralia and indicator lamp interface board；The CPU core core is connected with bus level change-over circuit on motherboard, after level conversion
It is connected with CPLD circuit, extended serial port circuit and RTC clock circuit, CPLD circuit passes through address and data time division multiplexing mode
Bus is connected with CAN interface circuit；Extended serial port circuit uses 4 passage asynchronism transceiver STC16C554 chips, extends 4 tunnels 232
Serial line interface connects 422/485 interface circuit；The CAN interface plate is connected with CAN interface circuit on motherboard, and described 422/485
Interface board is connected with 422/485 interface circuit on motherboard；Power module is designed using 5V Switching Power Supplies, is provided for each module of system
Working power.
2. the multi-functional communication interface machine device according to claim 1 based on PowerPC embedded systems, its feature exist
In：CAN interface plate includes CAN controller chip SJA1000 and general CAN isolated transceivers CTM8251T, the CAN controller
Chip is connected with general CAN isolated transceivers；General CAN isolated transceivers controlled connection in the CAN interface circuit on motherboard,
Every block of CAN interface plate integrates 2 CAN passages.
3. the multi-functional communication interface machine device according to claim 2 based on PowerPC embedded systems, its feature exist
In：The anti-lightning strike protection of gas-discharge tube, the protection of transient suppressor Anti-surging and CAN common modes are provided with each CAN Channel front ends
Wave filter suppression common mode disturbs three-level protection circuit.
4. the multi-functional communication interface machine device based on PowerPC embedded systems according to claim 1,2 or 3, its
It is characterised by：422/485 interface board selects the chip ADM2587EBRWZ of single supply isolated form 485/422 that ADI companies release,
The 485/422 chip controlled connection is in 422/485 interface circuit on motherboard；Every piece of 422/485 interface board integrates 2 serial ports
Passage.
5. the multi-functional communication interface machine device according to claim 4 based on PowerPC embedded systems, its feature exist
In：The anti-lightning strike protection of gas-discharge tube, transient suppressor Anti-surging two-stage protection circuit are provided with each serial ports Channel front end.
6. the multi-functional communication interface machine device according to claim 4 based on PowerPC embedded systems, its feature exist
In：Network interface circuit on CPU core core is made up of 2 network extended chip RTL8201CP and its peripheral circuit, to realize
The network connection of CPU core core and computer, the network extended chip RTL8201CP are connected with CPU core core, the network
Hardware configuration lever selection when extended chip RTL8201CP realizes electric on network chip by peripheral circuit.
7. the multi-functional communication interface machine device based on PowerPC embedded systems according to claim 1,2 or 3, its
It is characterised by：Network interface circuit on CPU core core is made up of 2 network extended chip RTL8201CP and its peripheral circuit,
To realize the network connection of CPU core core and computer, the network extended chip RTL8201CP is connected with CPU core core, institute
State hardware configuration lever selection when network extended chip RTL8201CP realizes electric on network chip by peripheral circuit.
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| CN201310614291.9A CN103607286B (en) | 2013-11-28 | 2013-11-28 | Multi-functional communication interface machine device based on PowerPC embedded systems |
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| CN105790856B (en) * | 2014-12-25 | 2020-04-24 | 研祥智能科技股份有限公司 | EMC protection system of automatic train control system host |
| CN108845520A (en) * | 2018-06-12 | 2018-11-20 | 西安微电子技术研究所 | A kind of embedded processing module based on P4080 processor |
| CN110850128A (en) * | 2019-11-11 | 2020-02-28 | 中国人民解放军海军工程大学 | On-site automatic test system bus for marine instrument |
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| CN202602678U (en) * | 2012-05-15 | 2012-12-12 | 河南辉煌科技股份有限公司 | Expansion circuit with multiple CAN (Controller Area Network) channel interfaces |
| CN203632688U (en) * | 2013-11-28 | 2014-06-04 | 河南辉煌科技股份有限公司 | Multifunctional communication interface machine device based on PowerPC embedded system |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202602678U (en) * | 2012-05-15 | 2012-12-12 | 河南辉煌科技股份有限公司 | Expansion circuit with multiple CAN (Controller Area Network) channel interfaces |
| CN203632688U (en) * | 2013-11-28 | 2014-06-04 | 河南辉煌科技股份有限公司 | Multifunctional communication interface machine device based on PowerPC embedded system |
Non-Patent Citations (1)
| Title |
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| 《基于Power PC嵌入式系统的通信接口机设计与开发》;牛振波等;《科技创新与应用》;20130918;第54页，图1 * |
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