Multi-CPU communication method and relay protection device

A communication method, the technology of CPU2, is applied in the direction of electrical digital data processing, combination of various digital computers, irreversible AC power input conversion to DC power output, etc. Achieve full utilization, improve communication speed and high reliability

Active Publication Date: 2009-12-16
北京清电华力电气自动化科技有限公司
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Problems solved by technology

Since serial transmission transmits data bit by bit, and the characteristics of SPI transmission itself, when the amount of communication data is large, it will consume a lot of system resources, and a

Method used

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  • Multi-CPU communication method and relay protection device

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Embodiment Construction

[0020] Such as figure 1 Shown, a kind of communication method among many CPUs, adopt high-speed full-duplex serial SPI communication mode between described CPU, ferroelectric memory FRAM is set between CPU, the SPI port of two CPUs is connected through the SPI port of FRAM. The present invention has three CPUs to work together, a FRAM is respectively connected between CPU1 and CPU2, and between CPU1 and CPU3. In order to establish a mutually compatible development platform, all three CPUs are embedded ARMs of LPC2200 series.

[0021] For the communication between CPU1 and CPU2, the SPI0 ports of CPU1 and CPU2 are connected through the SPI port of FRAM2. In order to avoid the simultaneous reading and writing conflicts of the two CPUs, two anti-collision communication lines are connected between CPU1 and CPU2. The IO0 port of CPU1 is connected to On the external interrupt EINT0 of CPU2, the IO0 port of CPU2 is connected to the external interrupt EINT0 of CPU1.

[0022] During c...

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Abstract

The invention provides a multi-CPU communication method, which adopts a high-speed full-duplex serial SPI communication mode among CPUs. The method is characterized in that ferroelectric memories FRAMs are arranged among the CPUs; SPI ports of at least two CPUs are connected through a SPI port of one FRAM; anti-collision communication lines are connected between the CPUs which are connected with the FRAM and communicate through the FRAM; and the CPUs send and receive data through the FRAMs. The multi-CPU communication method designed by the invention has the advantages of increasing transmission speed and reliability among the CPUs and solving collision problems when two CPUs read and write data at the same time. The reliability and operation speed of products are fully guaranteed by using a device adopting the multi-CPU communication method in relay protection equipment.

Description

Technical field: [0001] The invention belongs to the technical field of power system automation and relay protection, in particular to a communication method between core components CPUs in an automatic control system and a device using the communication method. Background technique: [0002] The vast majority of automatic devices, measuring devices and relay protection devices in modern power systems are composed of microprocessors, integrated circuits and electronic components. These automatic devices, measurement devices and relay protection devices are collectively referred to as "intelligent electronic devices" IED (Intelligent Electric Device). With the rapid development of large-scale integrated circuits and microprocessor technology, the functions and functions of CPU, the core component of intelligent electronic equipment IED, have also entered a new era. Many IEDs require multiple CPUs to work together. How to solve the problem between multiple CPUs? Communication...

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Application Information

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IPC IPC(8): G06F15/17G06F13/24H02M7/26H02M7/28
Inventor 黄益庄郭庆良袁启洪郝力宏张云
Owner 北京清电华力电气自动化科技有限公司
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