Low-power-consumption Bluetooth controller link layer device

Abstract

The invention discloses a low-power-consumption Bluetooth controller link layer device, which comprises an HCI control command sending module used for processing and sending a link layer control command to a link layer controller through an HCI command interface; a link layer controller which is used for processing related tasks of interactive communication with other equipment in cooperation withthe link layer processing device after receiving the HCI control command, and CPU participation is not needed; a link layer processing device which is used for responding to an interrupt service request of the link layer controller; and an interrupt request module which is used for requesting interrupt from the CPU under the condition that the link layer processing device cannot process the interrupt, and the processor is responsible for processing the interrupt. According to the invention, the special link layer device is added to process the command analysis of the link layer, the flexibility and the complexity are both considered, and the CPU dependence of the link layer protocol processing is reduced.

Description

technical field [0001] The invention relates to the technical field of design of baseband chips and connectivity chips, in particular to a link layer device of a low-power bluetooth controller. Background technique [0002] In the traditional low-power bluetooth controller, the link layer protocol processing is realized by means of hardware unit and CPU interrupt / command interaction. At the end of sending the link layer command, the processor processes the link layer protocol by configuring the link layer controller. At the end of receiving the link layer command, after the link layer controller receives the data packet, the interrupt notifies the processor, and the processor calls the preset terminal service program to process the link layer protocol. In this interactive process, a large number of frequent interrupt requests and interrupt processing tasks are involved. [0003] Such as figure 1 As shown in FIG. 2 , it is an overall architecture diagram of a traditional b...

AI Technical Summary

Problems solved by technology

[0004] Although the shared processor solution saves hardware resources, the CPU needs to take care of application processing, protocol processing and link layer protocol processing, and the computing power (MIPS) of the CPU is very tight. Unable to handle some complex applications

Increasing the main frequency will cause greater hardware loss and power loss

[0005]The dedicated protocol processor solution uses a dedicated processor to deal with link layer protocol processing, which can achieve a faster response speed, but the hardware overhead is relatively large

In the case of the current high CPU authorization fee, it puts pressure on the overall solution cost

[0006]In addition, some implementations use fixed hardware logic to implement part of the link layer protocol processing. Although the efficiency is high and the speed is fast, the system risk is high and the flexibility is insufficient , cannot be upgraded for protocol updates

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