spi-based data transmission system

Abstract

The present application provides an SPI-based data transmission system. In this system, the master SPI device enables the first slave SPI device through the combination of the first chip select signal and the second chip select signal. When the master SPI device drives the first chip select signal to be active and drives the second chip select signal to be inactive In the active state, the master SPI device controls the second slave SPI device to send data through the data line, the master SPI device can also receive data through the data line, and the first slave SPI device can receive data through the data line. Therefore, when the first chip select signal is in an active state and the second chip select signal is in an inactive state, the master SPI device and the first slave SPI device can simultaneously receive data transmitted by the second slave SPI device, which improves the data of the SPI system. transmission efficiency.

Description

[0001] This application claims the priority of the Chinese patent application filed on June 28, 2019 with the Intellectual Property Office of the People's Republic of China, the application number is 201910579263.5, and the invention name is "a data transmission system, chip, camera module and terminal equipment", The entire contents of which are incorporated herein by reference. technical field [0002] The present application relates to the technical field of data transmission, and in particular, to an SPI-based data transmission system. Background technique [0003] At present, camera modules that support optical image stabilization (OIS) include motor drivers, and each motor driver controls the motor of the camera module according to the gyroscope information collected by the gyroscope sensor (GYRO) to realize jitter compensation. Among them, taking a smartphone as an example, the gyroscope sensor is generally installed on the main board of the smartphone, and the gyrosc...

AI Technical Summary

Problems solved by technology

Since the master SPI device can only transmit data with one slave SPI device at the same time, when one camera module obtains gyroscope information from the gyroscope sensor, other camera modules will be delayed in obtaining gyroscope information from the gyroscope sensor, resulting in OIS effect is not ideal

[0005] In summary, due to the inefficient data transmission between SPI devices in an SPI system including multiple slave SPI devices, the OIS effect of the camera module as a slave SPI device is not ideal

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