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Multifunctional communication interface device based on powerpc embedded system

An embedded system, communication interface technology, applied in the direction of transmission system, data exchange details, electrical components, etc., can solve the problems of increased real-time data acquisition burden, sharp increase in communication data volume, etc., to solve abnormal communication and strong flexibility , the effect of improving flexibility

Active Publication Date: 2017-12-19
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 device based on powerpc embedded system
  • Multifunctional communication interface device based on powerpc embedded system
  • Multifunctional communication interface device based on powerpc embedded system

Examples

Experimental program
Comparison scheme
Effect test

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 is connected with the CPLD circuit, the extended serial port circuit and the RTC clock circuit after the level conversion Connec...

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 interface circuit shown includes the CAN controller chip SJA1000 and the general CAN isolation transceiver CTM8251T, the CAN controller chip is connected to the general CAN isolation transceiver; the general CAN isolation transceiver is controlled and connected to the CAN interface circuit on the motherboard , Each 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...

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 o...

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PUM

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Abstract

The invention relates to a multifunctional communication interface device. A multifunctional communication interface device based on a PowerPC embedded system, comprising a CPU core board, a motherboard, an interface board and a power supply module, wherein the CPU core board is equipped with a PowerPC embedded system processor; the motherboard is used as the main board of the device, mainly Including CPLD circuit, extended serial port circuit, bus level conversion circuit, RTC clock circuit, CAN interface circuit and 422 / 485 interface circuit; interface board includes CAN interface board, 422 / 485 interface board; said CPU core board and motherboard The bus level conversion circuit is connected, after level conversion, it is connected with the CPLD circuit, the extended serial port circuit and the RTC clock circuit. The CPLD circuit is connected with the CAN interface circuit through the address and data time-division multiplexed bus; the extended serial port circuit adopts 4-channel asynchronous The transceiver STC16C554 chip extends the 4-way 232 serial interface to connect to the 422 / 485 interface circuit; the CAN interface board and the 422 / 485 interface board are respectively connected to the CAN interface circuit and the 422 / 485 interface circuit on the motherboard.

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 communication 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 bu...

Claims

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Application Information

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Patent Type & Authority Patents(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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