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System wake-up method

A signal port and signal technology, applied in the field of communication, can solve problems such as multiple hardware resources, occupation, and increased software complexity, and achieve the effect of saving hardware resources and adding simple definitions

Active Publication Date: 2009-04-29
LEADCORE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the addition of hardware signals outside the serial port communication, this method obviously takes up more hardware resources
At the same time, in order to realize the wake-up function, it is necessary to design the control process and write codes for these custom signals on the software, which further increases the complexity of the software

Method used

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Embodiment Construction

[0022] The UART serial port is the most commonly used asynchronous serial interface in embedded systems, and the simple communication of the UART serial port can be realized only by using 2 signal lines between DCE and DTE. In order to ensure the reliability of communication and the efficiency of information transmission, the connection method of all 8 signal lines is usually adopted. The invention discloses a system wake-up method, which configures part of the hardware flow control signal ports in the UART serial port interface signal without adding new hardware signals, and realizes system wake-up through the UART serial port. The present invention will be described in detail below in conjunction with the accompanying drawings.

[0023] In the present invention, for the hardware flow control signal RTS port, the CTS port and the RI port are respectively configured as follows:

[0024] RI wakes up the wake-up signal of DTE for DCE, RI port is set to GPIO among the present in...

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Abstract

This invention discloses a method for awaking systems, in which, when needing a sleep state, a first system sets a first signal port an interruption trigger source and a second port an invalid state and enters into a sleep state, before a second system sends data to a first communication system, it sends interruption signal from the first signal port if testing invalid signal at the second signal port, the first system comes back to a normal state from sleeping state after receiving the interruption signal and sets the signal on the second port an effective state and recalls the interruption source at the first port, after testing effecitive state at the second port, the second system sends data to the first one.

Description

technical field [0001] The invention relates to the control technology of the working state of the internal system of the equipment in the field of communication, in particular to a method for waking up the system in the equipment. Background technique [0002] A Universal Asynchronous Receiver and Transmitter (UART, Universal Asynchronous Receiver and Transmitter) serial port is a commonly used asynchronous serial interface. For the two systems using UART serial port communication, they can be divided into data communication equipment (DCE, Datacommunication Equipment) and data terminal equipment (DTE, Data Terminal Equipment) according to their positions in the network. There are 8 UART serial port interface signals, namely: data transmission signal (TXD, Transmit Data), data reception signal (RXD, Receive Data), transmission request signal (RTS, Request To Send), permission to send signal (CTS, Clear To Send), DCE ready signal (DSR, Data Set Ready), DTE ready signal (DTR...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/24H04L12/26G06F1/26G06F15/00
Inventor 林俊超高兵
Owner LEADCORE TECH