Sensor data acquisition method with hierarchical storage

Abstract

The invention discloses a sensor data acquisition method with hierarchical storage comprising following steps: performing function configuration on the sensor according to preset parameters; collecting external measured data by means of the sensor and storing the data to a FIFO unit inside the sensor; inspecting whether the FIFO unit is full; if the FIFO unit is full, then a MCU carries data in the FIFO unit to a RAM memory unit inside the sensor; if the FIFO unit is not full, then returning to step 2; inspecting whether the RAM memory cell in the sensor is full or not; if the RAM memory cell is full, then a CPU carries the data in the RAM memory unit to a DDR memory unit through a CPU unit. According to the invention, by means of the hierarchical storage of data, the MCU carries data to the RAM only when the FIFO unit is full; after the RAM is full, data is carried to the DDR by the CPU so as to reduce the frequency of the CPU being called and achieve the purpose of power consumption reduction.

Description

technical field [0001] The invention relates to a method for collecting data with a sensor, in particular to a method for hierarchically storing sensor data. Background technique [0002] Sensor (Sensor) is a detection device that can feel the measured information, and can transform the detected information into electrical signals or other required forms of information output according to certain rules, so as to meet the requirements of information transmission and processing. , storage, display, recording and control requirements. It is the first link to realize automatic detection and automatic control. For example, G-sensor: a gravity sensor (Gravity-sensor), it can perceive the change of acceleration force, and convert this change into an electrical signal, and then send it to the microprocessor for calculation and analysis. [0003] Today, when computers are widely used, the importance of data acquisition is very significant. It is a bridge connecting the computer wi...

AI Technical Summary

Problems solved by technology

like figure 1 As shown, but in the actual situation, the user will not always query this information. For example, if a person is running and uses senosr to collect the number of steps, in general, he will query how many steps he has run after the end of the run, so it is not necessary to use the sensor The collected data is refreshed to DDR in real time, which will increase power consumption and cause waste of power. For portable devices, this power consumption control is particularly important

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