WO2008058435A1 - A method of mobile terminal with double processors mornitoring and controlling the working status processor - Google Patents

A method of mobile terminal with double processors mornitoring and controlling the working status processor Download PDF

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Publication number
WO2008058435A1
WO2008058435A1 PCT/CN2006/003777 CN2006003777W WO2008058435A1 WO 2008058435 A1 WO2008058435 A1 WO 2008058435A1 CN 2006003777 W CN2006003777 W CN 2006003777W WO 2008058435 A1 WO2008058435 A1 WO 2008058435A1
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Prior art keywords
processor
slave
cpu
mobile terminal
slave processor
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PCT/CN2006/003777
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French (fr)
Chinese (zh)
Inventor
Hong Wu
Xiaobing Ling
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Zte Corporation
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Publication of WO2008058435A1 publication Critical patent/WO2008058435A1/en

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/0703—Error or fault processing not based on redundancy, i.e. by taking additional measures to deal with the error or fault not making use of redundancy in operation, in hardware, or in data representation
    • G06F11/0706—Error or fault processing not based on redundancy, i.e. by taking additional measures to deal with the error or fault not making use of redundancy in operation, in hardware, or in data representation the processing taking place on a specific hardware platform or in a specific software environment
    • G06F11/0736—Error or fault processing not based on redundancy, i.e. by taking additional measures to deal with the error or fault not making use of redundancy in operation, in hardware, or in data representation the processing taking place on a specific hardware platform or in a specific software environment in functional embedded systems, i.e. in a data processing system designed as a combination of hardware and software dedicated to performing a certain function
    • G06F11/0742—Error or fault processing not based on redundancy, i.e. by taking additional measures to deal with the error or fault not making use of redundancy in operation, in hardware, or in data representation the processing taking place on a specific hardware platform or in a specific software environment in functional embedded systems, i.e. in a data processing system designed as a combination of hardware and software dedicated to performing a certain function in a data processing system embedded in a mobile device, e.g. mobile phones, handheld devices
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/0703—Error or fault processing not based on redundancy, i.e. by taking additional measures to deal with the error or fault not making use of redundancy in operation, in hardware, or in data representation
    • G06F11/0751—Error or fault detection not based on redundancy
    • G06F11/0754—Error or fault detection not based on redundancy by exceeding limits
    • G06F11/0757—Error or fault detection not based on redundancy by exceeding limits by exceeding a time limit, i.e. time-out, e.g. watchdogs

Definitions

  • the present invention relates to a silent processor mobile terminal, and in particular to a method for monitoring a working state of a slave processor.
  • BACKGROUND OF THE INVENTION In this rapidly changing information society, people are increasingly dependent on mobile terminals. Mobile terminals that integrate call, photo, MP3, videophone, mobile TV, Internet, games, etc. are also emerging in the market today. Coupled with the 2G and 3G overlap, many mobile terminals have the ability to work in two or more network modes. This kind of versatile, multi-mode mobile terminal system is not realistic enough to rely on the previous single CPU. Therefore, the dual CPU (dual processor, the following CPU refers to the processor) mobile terminal system came into being.
  • the dual CPU system has a master-slave CPU, and the human interface, display, speaker/pickup, and other input and output devices are all hung on the main CPU.
  • the CPU can be used to implement one or several very important functions separately, or it can be regarded as a special peripheral that is hung on the main CPU.
  • the technical problem to be solved by the present invention is to provide a method for monitoring and processing the operating state of a slave processor in a dual processor mobile terminal.
  • the technical solution of the present invention is to start a watchdog timer in the main processor, and include a dog feeding program in the function body content in the program of the slave processor, in the first predetermined time of the watchdog timer, if the main The processor does not receive the dog feed action, and the main processor sends a reset signal to restart the slave processor.
  • the watchdog timer of the main processor is in the ⁇ clock domain.
  • the dog feeding program is added to a program that is prone to failure in the slave processor.
  • the slave program that is included in any of the slave programs is not monitored for performing the dog feeding action, and the master processor issues a reset signal to restart the slave processor.
  • the feeding action refers to sending a reset signal.
  • FIG. 1 is a schematic diagram of hardware connection of the present invention
  • FIG. 2 is a schematic flow chart of the present invention.
  • the present invention utilizes a watchdog technique to realize real-time monitoring of the working state of a slave CPU from a CPU. Once an abnormality occurs from the CPU, the master CPU performs a RESET action on the slave CPU to restore the system to a normal working state. Start a watchdog timer in the slow clock domain of the main CPU. For the slave CPU, in the program that is prone to failure, such as the loop inside the waiting body, the time-consuming function body contains the "feed dog" part. .
  • the main CPU and the slave CPU interact with each other through a communication port, and can interact with an AT command, or can interact with a customized set of communication commands.
  • a watchdog timer (TIMER) is initiated in the main CPU's ⁇ man clock domain, which can be reset by the CLEAR signal sent from the CPU. If the main CPU does not receive the CLEAR signal from the slave CPU within the set time TO, the watchdog timer sets the reset pin of the slave CPU to the active state through a GPIO (general function pin) pin, and then Release, simulate an external manual reset, to restart from the CPU, get rid of the big state of the crash or dead loop.
  • GPIO general function pin
  • FIG. 2 is a flow chart of the present invention. After the main CPU is started, if a command to start the slave CPU is received, a boot is sent. The signal is sent to the slave CPU, and the WORKDET pin of the slave CPU is monitored to determine whether the slave CPU startup is completed. The watchdog timer is started after the slave CPU is booted.
  • the main CPU will first close the watchdog timer and then shut down the slave CPU. If the timer does not reset within the time TO, the main CPU will send a RESET signal to the slave CPU to restart the slave CPU. If the number of consecutive abnormalities from the CPU (for example, 3 minutes) is greater than n, the slave CPU is displayed on the LCD and the user is prompted to take other countermeasures.

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Debugging And Monitoring (AREA)

Abstract

A method of mobile terminal with double processors monitoring and controlling working statue of slave processor is disclosed. A watch dog timer is started at the side of main processor. A feeding dog process is included in function of process of slave processor. In the period of the first predetermined time of the watch dog timer, main processor sends reset signal to restart the slave processor if main processor doesn't receive feeding. The solution can monitor the working status of the slave processor by means of taking a timer in the main CPU as a watch dog of slave CPU. When user can't know the status of the slave processor, it can avoid the problem of dead cycle of slave CPU, or the problem of halting so that it can improve the robust of the system.

Description

欢处理器移动终端监控处理从处理器工作状态的方法 技术领域 本发明涉及默处理器移动终端， 具体涉及对从处理器工作状态的监控方 法。 背景技术 在这个瞬息万变的信息社会，人们对移动终端的依赖程度越来越高。那些 集通话、 拍照、 MP3、 可视电话、 手机电视、 上网、 游戏等多功能于一体的移 动终端在当今市场上也如雨后春夢般涌现。 加上处于 2G与 3G交叠时期， 许 多移动终端都具备在两种或多种网络模式下工作的能力。 这种多功能、 多模式 的移动终端系统要靠以前的单颗 CPU来出色完成已经不太现实， 于是双 CPU (双处理器， 以下 CPU即指处理器）移动终端系统应运而生。 双 CPU虽然能提高系统运行效率、 使系统响应更快， 但是系统硬件会因 此变得更加复杂， 如果没有很好的机制来协调两个 CPU 间的工作， 没有采取 足够的防呆、 防死机的措施， 系统就会更多的受到可靠性问题的困扰。 一般双 CPU系统有主从 CPU之分, 人机接口、 显示器、 扬声 /拾音器、 以及其它输入输出设备都是挂在主 CPU上面。 从 CPU可以用来单独实现某一 种或几种非常重要的功能， 也可以把它看作一种特殊外设， 挂在主 CPU上面。 处理器在自身硬件设计缺陷和软件设计 BUG, 以及病毒入侵的情况下，或者在 外界的撞击、 电磁辐射等强干扰作用下， 几乎不可避免的产生程序进入死循环 或系统彻底的死机等异常现象。 主 CPU发生异常， 用户可以通过人机界面艮 容易发现， 从而采取一些有效的应对措施。 但是从 CPU发生异常时， 用户一 般不易获取相关信息， 可能还会把它当作正常系统来使用。 发明内容 本发明要解决的技术问题是,提出一种在双处理器移动终端中监控处理从 处理器工作状态的方法。 本发明的技术方案是，在主处理器启动一个看门狗定时器，在从处理器的 程序里函数体内容中包含喂狗程序， 在看门狗定时器的第一预定时间内， 如果 主处理器没有收到喂狗动作， 主处理器发复位信号使从处理器重新启动。 所述主处理器的看门狗定时器在†曼时钟域。 所述喂狗程序加在从处理器中的容易出故障的程序中。 在本发明中，从处理器中的任何一个包含喂狗程序的被监控没有执行喂狗 动作， 主处理器发复位信号使从处理器重新启动。 所述喂狗动作是指发送重置信号。 如果在第二预定时间内从处理器连续异常次数大于预定数，则显示从处理 器异常。 本发明通过主 CPU 内的一个定时器来作从 CPU的看门狗， 实时监控从 CPU的工作情况， 在用户无法获悉从 CPU工作状态的情况下， 能自动有效的 解决从 CPU进入死循环、 死机等严重问题， 从而增强了系统的健壮性。 附图说明 图 1是本发明硬件连接示意图； 图 2是本发明的流程示意图。 具体实施方式 本发明利用看门狗技术， 实现主 CPU实时监控从 CPU的工作状态， 一旦 从 CPU有异常发生， 主 CPU对从 CPU进行 RESET动作， 使系统恢复到正常 工作 态。 在主 CPU的慢时钟域启动一个看门狗定时器， 对从 CPU, 在那些容易出 故障的程序中，如等待查询的循环体内部、耗时很大的函数体内部包含 "喂狗" 部分。 在看门狗定时器 TO时间内， 如果主 CPU没有收到 "喂狗" 的动作， 它 将认为从 CPU发生故障 , 就会发 RESET信号给从 CPU, 使从 CPU重新启动， 恢复正常工作。 TO如果取 5秒钟，对于工作时钟为几十甚至几百 MHz的 CPU来说， "喉 狗" 占用几个毫秒， 在 5秒的周期中只占用极少的资源。 下面结合附图和具体实施方式进一步说明本发明方法的技术方案。 附图 1为本发明的硬件连接图， 主 CPU与从 CPU通过通讯口相互交互， 可以以 AT命令交互， 也可以以自定义一套通信命令交互。在主 CPU的†曼时钟 域内启动一个看门狗定时器（TIMER ) , 它能被从 CPU发来的 CLEAR (清除) 信号重置。如果主 CPU在设定的时间 TO内没有收到来自从 CPU的 CLEAR信 号， 看门狗定时器则通过一个 GPIO (—般功能引脚） 引脚把从 CPU的复位引 脚置为有效态， 然后松开， 模拟一个外界手动复位， 使从 CPU重新启动， 摆 脱死机或死循环的大态。 从 CPU中有 N个被监控程序， 也就是这些程序中包含 "喂狗'， 动作， 只 要有一个程序异常， 没有执行 "喂狗" 的语句， 就会导致总的 "喂狗" GPIO 没有向主 CPU发 CLEAR命令，因此会使主 CPU执行看门狗动作，致使从 CPU 复位。 附图 2为本发明的流程图， 主 CPU启动之后 , 如果接到一个启动从 CPU 的命令， 发送一个开机信号给从 CPU, 同时监控从 CPU的 WORKDET引脚， 判断从 CPU启动是否完成。 在从 CPU启动完毕之后再启动看门狗定时器， 在 设置时间 TO内， 如果收到关从 CPU的命令， 主 CPU就会先关看门狗定时器， 再去关从 CPU。 如果时间 TO内定时器没有重置 , 主 CPU就会发 RESET信号 给从 CPU, 重新启动从 CPU。 如果在预设的时间内（如 3分钟）从 CPU连续异常次数大于 n,就在 LCD 上显示从 CPU异常， 提示用户采取其它应对措施。 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a silent processor mobile terminal, and in particular to a method for monitoring a working state of a slave processor. BACKGROUND OF THE INVENTION In this rapidly changing information society, people are increasingly dependent on mobile terminals. Mobile terminals that integrate call, photo, MP3, videophone, mobile TV, Internet, games, etc. are also emerging in the market today. Coupled with the 2G and 3G overlap, many mobile terminals have the ability to work in two or more network modes. This kind of versatile, multi-mode mobile terminal system is not realistic enough to rely on the previous single CPU. Therefore, the dual CPU (dual processor, the following CPU refers to the processor) mobile terminal system came into being. Although dual CPUs can improve system operation efficiency and make system response faster, the system hardware will become more complicated. If there is no good mechanism to coordinate the work between the two CPUs, it does not take enough foolproof and anti-crash. Measures, the system will be more plagued by reliability issues. Generally, the dual CPU system has a master-slave CPU, and the human interface, display, speaker/pickup, and other input and output devices are all hung on the main CPU. The CPU can be used to implement one or several very important functions separately, or it can be regarded as a special peripheral that is hung on the main CPU. In the case of its own hardware design flaws and software design bugs, as well as virus intrusion, or under the influence of external impact, electromagnetic radiation, etc., the processor almost inevitably generates an abnormal phenomenon such as a dead loop or a complete system crash. . An abnormality occurs in the main CPU, and the user can easily find it through the human-machine interface, so that some effective countermeasures can be taken. However, when an abnormality occurs from the CPU, the user is generally not easy to obtain relevant information, and may also use it as a normal system. SUMMARY OF THE INVENTION The technical problem to be solved by the present invention is to provide a method for monitoring and processing the operating state of a slave processor in a dual processor mobile terminal. The technical solution of the present invention is to start a watchdog timer in the main processor, and include a dog feeding program in the function body content in the program of the slave processor, in the first predetermined time of the watchdog timer, if the main The processor does not receive the dog feed action, and the main processor sends a reset signal to restart the slave processor. The watchdog timer of the main processor is in the †曼 clock domain. The dog feeding program is added to a program that is prone to failure in the slave processor. In the present invention, the slave program that is included in any of the slave programs is not monitored for performing the dog feeding action, and the master processor issues a reset signal to restart the slave processor. The feeding action refers to sending a reset signal. If the number of consecutive abnormalities from the processor in the second predetermined time is greater than the predetermined number, the slave processor is abnormal. The invention makes a watchdog from the CPU through a timer in the main CPU, monitors the working condition of the slave CPU in real time, and can automatically and effectively solve the problem of entering the infinite loop from the CPU when the user cannot learn from the working state of the CPU. Serious problems such as crashes, thus enhancing the robustness of the system. BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a schematic diagram of hardware connection of the present invention; FIG. 2 is a schematic flow chart of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention utilizes a watchdog technique to realize real-time monitoring of the working state of a slave CPU from a CPU. Once an abnormality occurs from the CPU, the master CPU performs a RESET action on the slave CPU to restore the system to a normal working state. Start a watchdog timer in the slow clock domain of the main CPU. For the slave CPU, in the program that is prone to failure, such as the loop inside the waiting body, the time-consuming function body contains the "feed dog" part. . During the watchdog timer TO time, if the main CPU does not receive the action of "feeding the dog", it will think that if the slave CPU fails, it will send a RESET signal to the slave CPU to restart the slave CPU and resume normal operation. If the TO is taken for 5 seconds, for a CPU with a working clock of tens or even hundreds of MHz, the "throat dog" takes up a few milliseconds and takes up very little resources in a 5 second cycle. The technical solution of the method of the present invention will be further described below with reference to the accompanying drawings and specific embodiments. 1 is a hardware connection diagram of the present invention. The main CPU and the slave CPU interact with each other through a communication port, and can interact with an AT command, or can interact with a customized set of communication commands. A watchdog timer (TIMER) is initiated in the main CPU's †man clock domain, which can be reset by the CLEAR signal sent from the CPU. If the main CPU does not receive the CLEAR signal from the slave CPU within the set time TO, the watchdog timer sets the reset pin of the slave CPU to the active state through a GPIO (general function pin) pin, and then Release, simulate an external manual reset, to restart from the CPU, get rid of the big state of the crash or dead loop. There are N monitored programs from the CPU, that is, these programs contain "feeding the dog", and the action, as long as there is a program exception, does not execute the "feed dog" statement, which will result in the total "feeding the dog" GPIO no direction. The main CPU sends a CLEAR command, thus causing the main CPU to perform a watchdog action, causing a reset from the CPU. Figure 2 is a flow chart of the present invention. After the main CPU is started, if a command to start the slave CPU is received, a boot is sent. The signal is sent to the slave CPU, and the WORKDET pin of the slave CPU is monitored to determine whether the slave CPU startup is completed. The watchdog timer is started after the slave CPU is booted. If the slave CPU command is received within the set time TO, The main CPU will first close the watchdog timer and then shut down the slave CPU. If the timer does not reset within the time TO, the main CPU will send a RESET signal to the slave CPU to restart the slave CPU. If the number of consecutive abnormalities from the CPU (for example, 3 minutes) is greater than n, the slave CPU is displayed on the LCD and the user is prompted to take other countermeasures.

Claims

权 利 要 求 书 一种双处理器移动终端监控处理从处理器工作状态的方法，其特征在于， 在主处理器启动一个看门狗定时器， 在从处理器的程序里函数体内容包 含喂狗程序， 在看门狗定时器的第一预定时间内， 如果主处理器没有收 到喂狗动作， 主处理器发复位信号使从处理器重新启动。 权利要求 1 所述的双处理器移动终端监控处理从处理器工作状态的方 法， 其特征在于， 所述主处理器的看门狗定时器在') "曼时钟域。 权利要求 1 所述的双处理器移动终端监控处理从处理器工作状态的方 法， 其特征在于， 所述喂狗程序包含在从处理器中容易出故障的程序中。 权利要求 1或 3所述的双处理器移动终端监控处理从处理器工作状态的 方法， 其特征在于， 从处理器中的任何一个包含喂狗程序的被监控没有 执行喂狗动作， 主处理器发复位信号使从处理器重新启动。 权利要求 1 所述的双处理器移动终端监控处理从处理器工作状态的方 法， 其特征在于， 所述喂狗动作是指发送重置信号。 权利要求 1 所述的双处理器移动终端监控处理从处理器工作状态的方 法， 其特征在于， 如果在第二预定时间内从处理器连续异常次数大于预 定数， 则显示从处理器异常。 A method for monitoring and processing a slave processor operating state by a dual processor mobile terminal, characterized in that a master watchdog timer is started, and a function body content includes a dog feed program in a slave processor program During the first predetermined time of the watchdog timer, if the main processor does not receive the dog feeding action, the main processor sends a reset signal to restart the slave processor. The method of claim 1, wherein the watchdog timer of the main processor is in a 'man' clock region. The method of claim 1 A dual processor mobile terminal monitors a method of processing a slave operating state, characterized in that the dog feeding program is included in a program that is prone to failure from a processor. The dual processor mobile terminal of claim 1 or 3. A method of monitoring processing from a processor operating state, wherein the slave processor is monitored to not perform a dog feeding action, and the master processor sends a reset signal to cause the slave processor to restart. The dual processor mobile terminal monitors a method for processing an operating state of a slave processor, wherein the dog feeding action refers to transmitting a reset signal. The dual processor mobile terminal monitoring processing slave processor of claim 1 a method of operating state, characterized in that, if the number of consecutive abnormalities from the processor in the second predetermined time is greater than a predetermined number, Display slave processor exception.
PCT/CN2006/003777 2006-11-16 2006-12-30 A method of mobile terminal with double processors mornitoring and controlling the working status processor WO2008058435A1 (en)

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