Communication system between multiple controllers

Abstract

The invention provides a communication system between multiple controllers. The communication system comprises a master controller, N slave controllers, N first AND doors and N second AND doors. The master controller is provided with N first emission ports and N first receiving ports, and N is an integer. Each slave controller is provided with a second emission port and a second receiving port. The first input end of each first AND door is connected with one first emission port of the master controller, the second input end of each first AND door is connected with the second emission port of the corresponding slave controller, and the output end of each first AND door is connected with one first receiving port of the master controller. The first input end of each second AND door is connected with one first emission port of the master controller, the second input end of each second AND door is connected with the second emission port of the corresponding slave controller, and the output end of each second AND door is connected with the second receiving port of the corresponding slave controller.

Description

technical field [0001] The invention relates to the technical field of electronic equipment manufacturing, in particular to a communication system between multiple controllers. Background technique [0002] With the continuous advancement of electronic technology, the communication between multiple devices has become an increasingly common problem, especially the communication between multiple controllers. At present, the communication system between multiple controllers generally adopts the following two methods: [0003] method one: [0004] Such as figure 1 Shown is a schematic diagram of a communication system between multiple controllers using the I2C bus in the prior art. The I2C bus uses the I2C interface module of the MCU, and uses two lines of SDA and SCL to realize bidirectional, low-speed communication. There are two working speed modes: standard (100kbps) and high-speed (400kbps). [0005] However, the following problems exist in adopting the I2C bus: althoug...

AI Technical Summary

Problems solved by technology

[0008] However, the use of CAN bus has the following problems: currently it is normal to use multiple MCUs on one product, and at the same time, the data synchronization between MCUs is required to be relatively high, and the data volume is relatively large

Therefore, all MCUs cannot be connected to the entire CAN network, which greatly increases the load of the CAN network and increases additional hardware costs

At the same time, the real-time performance of the CAN bus is lower, especially when the real-time performance is required to be within 10mS, and the amount of changed data is 100 bytes, and most of the current CAN network applications cannot meet the requirements.

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