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Multifunctional communication interface machine device based on PowerPC embedded system

An embedded system and communication interface technology, applied in the transmission system, data exchange details, electrical components, etc., can solve the problems of a sharp increase in the amount of communication data, an increase in the burden of real-time data collection, etc., achieve strong flexibility, and solve abnormal communication , the effect of high working frequency

Active Publication Date: 2014-02-26
HENAN SPLENDOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the gradual increase in the number of connected CAN interface devices in the centralized signal monitoring system, the current use of ISA and PC104 type CAN expansion cards is limited by the lack of expansion slots on the industrial computer. In addition, with the increase of monitoring content, the amount of communication data increases sharply. The burden on the machine for real-time data collection increases a lot

Method used

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  • Multifunctional communication interface machine device based on PowerPC embedded system
  • Multifunctional communication interface machine device based on PowerPC embedded system
  • Multifunctional communication interface machine device based on PowerPC embedded system

Examples

Experimental program
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Embodiment 1

[0021] see figure 1 , the present invention is based on the multifunctional communication interface machine device of PowerPC embedded system, comprises CPU core board, mother board, interface board and power module, wherein CPU core board carries PowerPC embedded system processor and network interface circuit; Motherboard serves as this The main board of the device mainly includes CPLD circuit part, extended serial port circuit part, bus level conversion circuit part, RTC clock circuit part, CAN interface circuit part and 422 / 485 interface circuit part; said interface board includes CAN interface board, 422 / 485 interface circuit part; 485 interface board and indicator light interface board to complete the expansion and protection functions of the interface; the CPU core board is connected with the bus level conversion circuit on the motherboard, and connected with the CPLD circuit, the extended serial port circuit and the RTC circuit after the level conversion , the CPLD circ...

Embodiment 2

[0024] see figure 1 , figure 2 . The multifunctional communication interface machine device based on the PowerPC embedded system of the present embodiment is different from Embodiment 1 in that: the CAN interface board adopts such as figure 2 The shown interface circuit includes a CAN controller chip SJA1000 and a general-purpose CAN isolation transceiver CTM8251T, the CAN controller chip is connected to the CAN isolation transceiver; the CAN isolation transceiver is controlled and connected to the CAN interface circuit on the motherboard, and each One CAN interface board integrates 2 CAN channels to complete protection functions, isolation functions, protocol conversion functions, etc.

[0025] During specific implementation, for the sake of equipment safety, a gas discharge tube anti-lightning protection, a transient suppressor anti-surge protection, and a CAN common-mode filter to suppress common-mode interference three-level protection circuits can be installed at the ...

Embodiment 3、 Embodiment 4

[0027] see figure 1 — image 3 , the multifunctional communication interface device based on PowerPC embedded system of these two embodiments, its difference with embodiment 1 and embodiment 2 respectively is: 422 / 485 interface board adopts such as image 3 The interface circuit shown. The interface circuit selects ADM2587EBRWZ chip, and the ADM2587EBRWZ chip is controlled and connected to the 422 / 485 interface circuit on the motherboard. Each 422 / 485 interface board integrates 2 serial port channels to complete protection functions, isolation functions, protocol conversion functions, etc.

[0028] ADM2587 / 2E is a high-performance single-voltage fully isolated 485 / 422 chip launched by ADI after ADM2483. The chip has a built-in DC-DC power supply, a magnetic isolation channel, and a full-duplex RS485 transceiver, which completely solves the problem of an external DC-DC module for RS485 isolation communication.

[0029] Similarly, for equipment safety protection, two levels of...

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Abstract

The invention relates to a multifunctional communication interface machine device, in particular to a multifunctional communication interface machine device based on a PowerPC embedded system. The multifunctional communication interface machine device based on the PowerPC embedded system comprises a CPU core board, a mother board, interface boards and a power module. A processor of the PowerPC embedded system is carried by the CPU core board. The mother board serves as a main board of the multifunctional communication interface machine device, and mainly comprises a CPLD circuit, an extension serial port circuit, a bus level conversion circuit, an RTC clock circuit, a CAN interface circuit and a 422 / 485 interface circuit. The interface boards comprise CAN interface boards and 422 / 485 interface boards. The CPU core board is connected with the bus level conversion circuit on the mother board, and is connected with the CPLD circuit, the extension serial port circuit and the RTC clock circuit after level conversion. The CPLD circuit is connected with the CAN interface circuit through a bus of the address and data time division multiplexing mode. Four paths of 232 serial interfaces are extended by the extension serial port circuit through a four-channel asynchronous transceiver STC16C554 chip to be connected with the 422 / 485 interface circuit. The CAN interface boards and the 422 / 485 interface boards are connected with the CAN interface circuit and the 422 / 485 interface circuit on the mother board respectively.

Description

technical field [0001] The invention relates to a multifunctional communication interface device, in particular to a multifunctional communication interface device based on a PowerPC embedded system, which is used to realize data transfer between Ethernet and CAN-bus, Ethernet and serial communication convert. Background technique [0002] With the rapid development of railway traffic, railway safety issues become more prominent. The input of various signal detection equipment and monitoring facilities puts forward higher requirements on the communication ability of the railway signal computer monitoring system. Due to the gradual increase in the number of connected CAN interface devices in the signal centralized monitoring system, the current use of ISA and PC104 type CAN expansion cards is limited by the lack of expansion slots on the industrial computer. In addition, with the increase of monitoring content, the amount of communication data increases sharply. The burden ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/02H04L29/10
Inventor 牛振波张成斌徐大贵
Owner HENAN SPLENDOR SCI & TECH
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