Monitoring method for household electric appliance microcontroller
A technology of microcontrollers and household appliances, applied in general control systems, program control, computer control, etc., can solve problems such as failure of electrical systems, and achieve the effect of ensuring reliability and improving anti-interference ability.
Inactive Publication Date: 2012-07-11
MIDEA GRP CO LTD
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[0003] The purpose of the present invention is to provide a monitoring method for the micro-controller of household appliances to solve the technical problem in the prior art that the electrical system fails due to the failure of the micro-controller
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[0017] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0018] This embodiment takes the application of this software design method on an induction cooker product as an example for illustration. As a software design method for MCU self-test and error correction, it can ensure that the MCU that is working in the system can be automatically reset after failure to ensure the core power of the induction cooker product. device is not damaged and safe.
[0019] Such as figure 1 As shown, the error-proof data area is pre-designed in the RAM area of the microcontroller MCU of the induction cooker, and the error-proof data area is placed between the normal data area 1 and the normal data area 2. The error-proof data area includes 6 bytes of error-proof detection codes, and the data are 0X5B, 0XB5, 0X1F, 0XF1, 0X9E, 0XE9.
[0020] Such as figure 2 As shown, after the induction cooker is turned on, its i...
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The invention relates to a monitoring method for a household electric appliance microcontroller, in particular to a method for monitoring the errors of a household electric appliance microcontroller. The monitoring method comprises the following steps: (1) designating a fixed area as an anti-error data area in an RAM area of the microcontroller; (2) setting initial default data of the anti-error data area; (3) when in the operation process of a household electric appliance, the microcontroller firstly entering a main program cycle system after initialization, when selecting functions, the main program calling a corresponding function sub-program, then the main program calling an automatic error correction program per 1ms at regular intervals through interrupt of the function sub-program, the automatic error correction program reading the data in the anti-error data area, monitoring whether the other is consistent with the initial default data; if yes, judging that the household electric appliance works normally; otherwise judging that the household electric appliance works abnormally. The method can greatly improve the anti-interference capability of MCU so as to ensure the reliability of safety work of an electric appliance system.
Description
technical field [0001] The invention relates to a monitoring method for a microcontroller of a household appliance, in particular to a method for monitoring errors of a microcontroller of a household appliance. Background technique [0002] At present, the monitoring and error correction methods of microcontrollers (MCU) mainly include methods such as watchdog, setting software traps, and applying redundant instructions, which are mainly aimed at controlling the phenomenon of software runaway. In the actual application of household electrical appliances, due to the uncertainty of power grid fluctuations, the actual situation of non-isolated power supplies for some household electrical appliances, and the fact that the maximum reset voltage of individual MCUs is lower than its minimum normal operating voltage, As a result, during the working process of household electrical appliances, the data in the RAM inside the MCU is disturbed and changed, causing the chip to work abnorm...
Claims
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IPC IPC(8): G05B19/048
Inventor 谢波李新峰王龙江
Owner MIDEA GRP CO LTD