Device-to-device communication method and device topology based on mipi protocol

Abstract

The present invention discloses a communication method between devices based on the MIPI protocol and a device topology structure. The method includes: connecting a sending port of a master device to multiple slave devices; configuring state machines on all slave devices; and judging by all slave devices Whether the receiving end selection command is received, if so, all slave devices enter the waiting state from the shared state; the slave device in the waiting state receives the ID matching data packet sent by the master device, and judges whether the ID matching data packet matches, and if so, the slave device The device enters the selected state from the waiting state, otherwise, the slave device enters the unselected state from the waiting state; the slave device in the selected state receives the data and / or control commands sent by the master device through the sending port, and performs data and / or control commands. deal with. The invention can reduce the development difficulty of the sending port on the master device, the connection complexity and the control complexity between the master device and the slave device, and improve the stability of the system.

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

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