Inter-device communication method based on MIPI protocol and device topological structure

Abstract

The invention discloses an inter-device communication method based on an MIPI protocol and a device topological structure. The method comprises the steps that a sending port of a master device is connected with a plurality of slave devices; state machines are configured on all the slave devices; all the slave devices judge whether a receiving end selection command is received or not, and if yes, all the slave devices enter a waiting state from a sharing state; the slave device in the waiting state receives the ID matching data packet sent by the master device and judges whether the ID matchingdata packet is matched or not, if yes, the slave device enters a selected state from the waiting state, and otherwise, the slave device enters a non-selected state from the waiting state; and the slave device in the selected state receives the data and / or the control command sent by the master device through the sending port, and processes the data and / or the control command. According to the invention, the development difficulty of the sending port on the master device and the complexity of the connection line and control between the master device and the slave device can be reduced, and thestability of the system is improved.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a MIPI protocol-based inter-device communication method and device topology. Background technique [0002] With the continuous improvement of living standards, mobile consumer electronic products, such as mobile phones, tablet computers, cameras, etc., are widely used. A display system in a mobile consumer electronic product usually includes a main device and a display module, and the main device controls the display module to display images. The MIPI protocol is usually used for communication between the main device and the display module, that is, the main device is provided with a sending port for sending MIPI signals (denoted as MIPITX), and the display module is provided with a receiving port for receiving MIPI signals (denoted as MIPITX). MIPI RX), the sending port and the receiving port are connected through Data Lane0~Data Lane3, and the Clock Lane signal line. [0003...

AI Technical Summary

Problems solved by technology

[0003] In a display system, when the main device needs to connect multiple display modules, usually by setting multiple MIPITX ports on the main device, each MIPITX port is connected to a display module, or one MIPITX port on the main device is connected to multiple Display module, however, setting multiple MIPITX ports on the main device increases the development difficulty of the main device. At the same time, connecting multiple display modules to one MIPITX port is likely to cause competition when reading data. When competition exists, between the host and The MIPI connection between all the display modules is controlled by the selection switch. At any time, only one MIPI connection between the display module and the host is connected. The connection complexity and control complexity between them may easily cause the instability of the display system

Images