Method for realizing rapid communication between a plurality of slave devices and SPI master device

Abstract

The invention discloses a method for realizing rapid communication between a plurality of slave devices and an SPI master device. The method comprises the steps of obtaining first device information of a first slave device, sending the first device information to a preset register set configuration module to control the preset register set configuration module to generate multiple parts of configuration information according to the first device information, and sending the multiple parts of configuration information to a selector module; acquiring a first signal of a first slave device, and sending the first signal to the selector module to control the selector module to select a corresponding first configuration register group according to the plurality of parts of configuration information; the corresponding parameter information is sent to the SPI master control logic module through the first configuration register set, so that the SPI master control logic module uses the parameterinformation as parameter configuration of current communication, the setting time of direct communication between the master device and the slave device can be shortened, and the communication response speed of the master device and the slave device is increased.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to a method for realizing fast communication between a plurality of slave devices and an SPI master device. Background technique [0002] With the rapid development of IoT technology, more and more IoT devices are rapidly entering people's lives. As one of the standard communication interfaces between microcontroller chips (MCUs), sensor chips, and radio frequency chips in the Internet of Things, SPI has attracted more and more attention. The MCU is usually the main control chip in the Internet of Things. In the application, it is often necessary to connect multiple sensor chips and radio frequency chips through the SPI interface. How to quickly communicate with multiple slave devices with different configurations through an SPI master module has become one of the core technical points in the current MCU chip design. [0003] In the technology of existing SPI master device des...

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Problems solved by technology

[0004] In the prior art, there is only one set of CPHA / CPOL / Endian / BandRate setting registers. Before the master device communicates with multiple slave devices supporting different configurations, software needs to change the configuration of these registers, which increases the communication time.

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