Double-CPU communication method and system and system-on-chip chip

Abstract

The embodiment of the invention relates to the technical field of embedded equipment, and discloses double-CPU communication method and system and a system-on-chip chip. The method comprises the steps of receiving data which are transmitted by a first application program on a first CPU through an API and are to be sent to a second CPU; updating the state of a first virtual data channel into a sending state; assembling the data to be sent to the second CPU; transferring the assembled data into an exclusive first cache area of the first virtual data channel; determining whether the virtual data channel of other application programs running in the first CPU are in the non-sending state; if so, sending an interrupting signal to the second CPU to inform the second CPU of reading the data in the first cache area. With the adoption of the method, the data can be sent in parallel to the CPU of the opposite side by the application program, and moreover, that the interrupting signal is frequently sent can be avoided.

Description

technical field [0001] The invention relates to the technical field of embedded devices, in particular to a dual-CPU communication method, system and system-on-chip chip. Background technique [0002] With the development of mobile communications, the software functions of smart terminals are becoming more and more complex, and the requirements for the CPU (Central Processing Unit) are also getting higher and higher. A single CPU can no longer meet the requirements of system performance. More and more mobile terminals adopt a multi-CPU architecture, especially in the field of mobile phones, BB (Base Band, baseband processor) + AP (Application Processor, application processor) dual-CPU architecture SoC (System on a Chip, on-chip system) has become the mainstream of the market. At the same time, how to achieve stable and efficient communication between dual CPUs has become a topic that must be solved at present. [0003] Commonly used solutions for dual-CPU communication in ...

AI Technical Summary

Problems solved by technology

[0005] 1. The CPU runs on a system that supports multitasking. Generally, multiple applications are running at the same time. When such a scenario occurs: an application on CPU A is sending data to CPU B, another application on CPU A When the program also needs to send data to CPU B, since there is only one one-way data channel between the CPUs, in order not to cause channel data confusion, the second application program that has a sending request can only wait for the first application program to complete sending data. Send your own data, that is, each application needs to "queue", causing a delay in the response of the application;

[0006] 2. In order to send data to the other party in time, and because it is impossible to predict whether the multitasking system will have data to be sent later, the application must send an irq (Interrupt Request, interrupt request) signal to the other party's CPU every time it sends data to notify Data sending events cause frequent interruptions and affect the normal operation of the CPU

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