Method, device and equipment for acquiring position data of position sensor

Abstract

The invention discloses a method, a device and equipment for acquiring position data of a position sensor, which are applied to a singlechip. The method comprise the steps of configuring an input / output (I / O) interface into a serial peripheral interface (SPI) in advance; controlling a direct memory access (DMA) controller to send a preset clock pulse to the position sensor at a preset frequency through the SPI; controlling the DMA controller to receive the position data of the preset frequency sent by the position sensor; and the preset frequency being greater than the highest sending frequency of the I / O interface. As the highest limit value of the clock pulse sending frequency of the SPI is far greater than the highest sending frequency of the I / O interface, the preset frequency can be set to be greater than the highest sending frequency of the I / O interface, and under the condition, the position sensor can also send position data to the single chip microcomputer at the preset frequency, so that the higher position data acquisition frequency is met, and the position sensor can be applied to more occasions.

Description

technical field [0001] The invention relates to the field of position sensors, in particular to a method for acquiring position data of a position sensor, and the invention also relates to a device and equipment for acquiring position data of a position sensor. Background technique [0002] Position sensor is a kind of sensor commonly used in all walks of life, and it can obtain the position data of target object, can utilize single-chip microcomputer to gather the position data that position sensor obtains in the prior art, and single-chip microcomputer can pass self I / O ((Input / Output , input and output) interface to simulate the clock pulse of the BISS-C protocol (the transmission protocol of the position sensor), after the position sensor receives the clock pulse, it can send the position data to the microcontroller according to the clock pulse, but the I / 0 interface can The upper limit of the frequency of sending clock pulses is low, and the position sensor also sends p...

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Problems solved by technology

[0002] Position sensor is a kind of sensor commonly used in all walks of life, and it can obtain the position data of target object, can utilize single-chip microcomputer to gather the position data that position sensor obtains in the prior art, and single-chip microcomputer can pass self I / O ((Input / Output , input and output) interface to simulate the clock pulse of the BISS-C protocol (the transmission protocol of the position sensor), after the position sensor receives the clock pulse, it can send the position data to the microcontroller according to the clock pulse, but the I / 0 interface can The upper limit of the frequency of sending clock pulses is low, and the position sensor also sends position data to the microcontroller at the frequency of clock pulses, which leads to a low frequency of position data collection, and in some occasions, position data is required to have a higher collection frequency , so the application of the position sensor is limited

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