A device priority control method, device and system based on IIC bus

Abstract

The invention discloses an IIC bus-based equipment priority control method, device and system; the method comprises the following steps: a priority defining module pre-defines priorities of all peripheral devices connected on the IIC bus; a storage module stores device numbers of all peripheral devices and corresponding priority information; an obtaining module obtains IIC communication information and the priority information thereof of a to-be-communicated peripheral device when a main controller starts IIC communication with the to-be-communicated peripheral device; when the main controller uses one IIC interface to connect a plurality of peripheral devices, a control module can control the communication between the main controller and the peripheral devices according to priorities, the communication states of the peripheral devices on the IIC bus, the IIC communication information of the to-be-communicated peripheral device, and the work states of the priority information control to-be-communicated peripheral device, thus improving mobile terminal performance.

Description

technical field [0001] The present invention relates to the technical field of mobile terminals, in particular to an IIC bus-based device priority control method, device and system. Background technique [0002] At present, many peripheral devices on the mobile terminal are connected to the main controller through the general-purpose IIC bus, so that one IIC bus interface on the main controller is connected to multiple peripheral devices, and the purpose of saving pin resources on the main controller is achieved. ; However, this also brings a problem at the same time, that is, because the IIC bus is multiplexed by multiple devices, the main controller and the peripheral devices do not distinguish priorities when communicating through IIC, so there may be devices with low priority The long-term occupation of the IIC bus makes it impossible for high-priority devices to use the IIC bus. For example, the main controller connects the NFC chip and the direction sensor through an ...

AI Technical Summary

Problems solved by technology

[0002] At present, many peripheral devices on the mobile terminal are connected to the main controller through the general-purpose IIC bus, so that one IIC bus interface on the main controller is connected to multiple peripheral devices, and the purpose of saving pin resources on the main controller is achieved. ; However, this also brings a problem at the same time, that is, because the IIC bus is multiplexed by multiple devices, the main controller and the peripheral devices do not distinguish priorities when communicating through IIC, so there may be devices with low priority The long-term occupation of the IIC bus prevents high-priority devices from using the IIC bus

For example, the main controller connects the NFC chip and the direction sensor through an IIC bus interface. Generally speaking, because the NFC function is used for mobile payment, it has high requirements for real-time performance, so the priority of the NFC chip is higher than that of the direction sensor. If the direction sensor A large amount of data is transmitted to the main controller and occupies the IIC bus for 5 seconds continuously, and the mobile payment function performed by the user will not be available within these 5 seconds

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