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Method for predicting watchdog resetting, microcontroller and embedded system

A preset value and memory technology, applied in the field of communication, can solve problems such as DDR data jumps, and achieve the effect of reducing abnormal behavior

Active Publication Date: 2015-08-26
HUAWEI TECH CO LTD
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  • Abstract
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Problems solved by technology

[0004] In view of the above defects of the prior art, the present invention provides a method for predicting the occurrence of a dog reset, a microcontroller and an embedded system, which solves the problem in the prior art that the MCU will not provide a clock to the DDR during the dog reset period, resulting in a dog reset. The problem that DDR data may jump before and after reset

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  • Method for predicting watchdog resetting, microcontroller and embedded system
  • Method for predicting watchdog resetting, microcontroller and embedded system
  • Method for predicting watchdog resetting, microcontroller and embedded system

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Embodiment Construction

[0057] The embodiment of the present invention provides a method for predicting the occurrence of a dog reset, a microcontroller and an embedded system, which can ensure that the DDR data will not jump during the dog reset, thereby reducing abnormal behaviors caused by data changes during program operation .

[0058] In order to make the purpose, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the following The described embodiments are only some, not all, embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention belong to the protection scope of the present invention.

[0059] figure 1 It is an embodiment of the method for predicting the oc...

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Abstract

The invention provides a method for predicting watchdog resetting, a microcontroller and an embedded system. An MCU (micro control unit) enters an interrupt handling program according a running program to determine that watchdog resetting is to occur, and then a DDR (double data rate) is switched to a self-refreshing mode to wait for watchdog resetting, so that watchdog resetting can be predicted, then the DDR is switched to the self-refreshing mode before watchdog resetting occurs, data of the DDR cannot jump during watchdog resetting, and accordingly, abnormal behavior caused by data changes when the program runs can be reduced.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of communication, and in particular to a method for predicting the occurrence of a dog reset, a microcontroller and an embedded system. Background technique [0002] With the rapid development of embedded devices, the complexity of embedded software is also rising, and watchdogs and large-capacity data storage devices are widely used. The watchdog is used to monitor and manage the reset circuit of microcontrollers (MCU, Micro Control Unit) such as single-chip microcomputers and digital signal processors (DSP, Digital Signal Processor). The door dog is a pulse signal, commonly known as "feed the dog". If the watchdog does not receive the "feed the dog" signal after the specified time, the watchdog outputs a pulse to the reset pin of the MCU to reset the MCU. [0003] When double-rate synchronous dynamic random access memory (DDR, Double Data Rate) stores data, the MCU needs to prov...

Claims

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Application Information

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IPC IPC(8): G06F1/24G06F11/00
Inventor 赵辰叶小康
Owner HUAWEI TECH CO LTD
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