DMA-based spi communication method, electronic equipment, storage medium, device

Abstract

The invention provides a DMA-based SPI communication method, comprising steps: after the processor is powered on, the SPI interface is initialized; the processor initializes the receiving and sending configuration of the DMA; When the data to be sent is reached, the DMA is started to send the data to be sent in parallel. When the data to be sent is sent, the DMA generates a transmission completion interrupt; the main program of the processor loops to detect the SPI interface. When the main program of the processor detects the data to be received, Start the DMA to receive the data to be received in parallel, and when the data to be received has been received, the DMA generates a receive completion interrupt. The invention relates to electronic equipment and a readable storage medium for executing the above method; the invention also relates to a DMA-based SPI communication device. The invention adopts the DMA technology and the interrupt generated by the DMA, so that the main program of the processor can quickly take and process the data in the interrupt service program, and obviously reduce the time resources occupied by the single-chip microcomputer.

Description

technical field [0001] The invention relates to the technical field of computers, in particular to a DMA-based SPI communication method, electronic equipment, storage media and devices. Background technique [0002] In the single-chip microcomputer system, there are usually many external chips connected to the single-chip microcomputer. These external chips can realize a specific function that the single-chip microcomputer cannot realize, such as data memory, temperature sensor, Ethernet network communication, etc. The single-chip microcomputer communicates with the external chip through a specific interface protocol, such as the SPI interface protocol, so as to achieve the purpose of controlling the external chip. Therefore, the speed and efficiency of the interface protocol for communicating with external chips is very important. [0003] At present, most single-chip microcomputers do not have integrated DMA function. The SPI communication method with external chips is us...

AI Technical Summary

Problems solved by technology

The program communication speed and efficiency of this method are very low, occupying a large amount of time resources of the single-chip microcomputer, causing the running speed of the single-chip microcomputer to slow down, and when the function of the product is more complicated or there are many transactions to be processed, the SPI communication with the external chip cannot be realized.

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