Mistake-proofing programming method for double CPUs

Abstract

The invention provides a mistake-proofing programming method for double CPUs. The unidirectional conductivity of the diode is utilized; a double-CPU mistake-proofing circuit is added in a product withdouble CPUs. The method comprises the following steps: respectively and correspondingly adding a section of different I / O port control codes in a program programmed to the two CPUs, controlling one I / O port in the two CPUs through the I / O port control codes, controlling the I / O port of one CPU to generate a high level, and controlling the I / O port of the other CPU to generate a low level; the double-CPU error-proof circuit is formed by connecting a light emitting diode and a divider resistor in series; the positive end of the light emitting diode is connected with an I / O port for generating high level in the CPU; the negative end of the light emitting diode is connected with the I / O port for generating low level in the other CPU; therefore, when a program is programmed for the double CPUs, if programming is correct, the light-emitting diode in the double-CPU mistake-proofing circuit is normally lightened, otherwise, the light-emitting diode is not lightened, so that whether programming of the double-CPU program is correct can be simply and visually judged.

Description

technical field [0001] The invention relates to the technical field of error prevention for dual CPUs, in particular to an error prevention programming method for dual CPUs. Background technique [0002] With the increasing number of product functions, electrical products based on multi-CPU architecture have appeared in the aviation electrical field and civil industrial electrical field. like figure 1 and 2 As shown, a product adopts a dual-CPU architecture. CPU1 is the main control chip and is mainly used for control strategy functions such as PWM. CPU2 is mainly used for protection functions such as temperature and fault alarms. Therefore, when the product is shipped or upgraded, the dual CPUs must be Download the corresponding software program. [0003] In order to improve the accuracy of the program download, the JTAG port of the program download of each CPU is specially marked with silk screen. When downloading the program, the programming personnel first need to co...

AI Technical Summary

Problems solved by technology

[0005] 1) Multiple manual confirmations, resulting in low work efficiency;

[0006] 2) Printed board markings will have problems such as oil pollution and unclear markings.

[0007] 3) After the program download is completed, in order to prevent programming errors, a lot of additional equipment is required for functional testing, and the test period is long;

[0008] 4) It is not convenient for the field to quickly upgrade the program

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