Method, device and equipment for capturing pulse width modulation signal
A technology of pulse width modulation and signal capture, which is applied in the electrical field, can solve the problems of occupying too many processor resources, wasting system resources, frequent interruptions, etc., and achieve the effect of avoiding processor resources and avoiding waste of system resources
Pending Publication Date: 2021-01-19
SHEN ZHEN 3IROBOTICS CO LTD
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[0003] The embodiment of the present application provides a pulse width modulation signal capture method, device, and equipment, which can solve the problem that when the initial signal is a high-frequency signal, the capture of the pulse width modulation signal will be frequently interrupted, occupying too many processor resources, and wasteful system resource problem
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[0046]In the following description, for the purpose of illustration rather than limitation, specific details such as a specific system structure and technology are proposed for a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid unnecessary details from obstructing the description of this application.
[0047]It should be understood that when used in the specification and appended claims of this application, the term "comprising" indicates the existence of the described features, wholes, steps, operations, elements and / or components, but does not exclude one or more other The existence or addition of features, wholes, steps, operations, elements, components, and / or collections thereof.
[0048]It sh...
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The invention is applicable to the technical field of electricity, and provides a method for capturing a pulse width modulation signal. The method comprises the following steps of: determining a pulsewidth modulation period and an effective pulse width according to a first interrupt function; executing a signal capture function, the first interrupt function and the second interrupt function, andcapturing an initial signal according to the PWM period, the effective pulse width and a preset capture strategy to obtain a pulse width modulation signal, wherein the second interrupt function is used for controlling an interrupt response function of the first interrupt function. Thus, the interruption frequency of the pulse width modulation signal is controlled by the low-frequency second interruption function, and when the initial signal is a high-frequency signal, frequent interruption is avoided, so that the problem that excessive processor resources are occupied by frequent interruptiongenerated when the high-frequency initial signal is input is prevented, and system resources are prevented from being wasted.
Description
Technical field[0001]This application belongs to the field of electrical technology, and in particular relates to a method, device and equipment for capturing pulse width modulated signals.Background technique[0002]Pulse Width Modulation (Pulse Width Modulation, PWM) is to obtain the desired waveform (including shape and amplitude) by modulating the width of a series of pulses. PWM control technology is the most widely used in inverter circuits. Most of the inverter circuits used are of PWM type, which are widely used in many fields from measurement and communication to power control and conversion. The existing method for capturing the pulse width modulation signal is to obtain the period value and the effective level pulse width value of the initial signal through a timer, and then convert the duty ratio to obtain the pulse width modulation signal. However, in this way, when the initial signal is a high-frequency signal, it will be frequently interrupted, resulting in excessive pr...
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IPC IPC(8): H03K5/01
CPCH03K5/01
Inventor 杨勇宫海涛颜世智
Owner SHEN ZHEN 3IROBOTICS CO LTD