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

Abstract

The present invention discloses a MIPI protocol-based inter-device communication method and device topology. The method includes connecting a sending port of a master device to multiple slave devices; when reading and writing data, the master device sends DSI data packets to the slave device; the master device sends a DSI data packet to the slave device; The device and the slave device perform bus ownership transfer, and during the transfer process, all slave devices judge whether the read request data packet in the DSI data packet matches, and the matching slave device obtains the bus ownership and sends data to the master device; the unmatched The slave device first enters the data return monitoring state and performs corresponding operations, and further enters the bus ownership monitoring state and performs corresponding operations when the matching slave device completely transmits the data and starts to transfer the bus ownership. 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 transmission port for sending MIPI signals (denoted as MIPI TX), and the display module is provided with a receiving port for receiving MIPI signals ( Denoted as 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 MIPI TX ports on the main device, each MIPI TX port corresponds to a display module, or a MIPI TX terminal on the main device Connect multiple display modules, however, setting multiple MIPI TX ports on the main device increases the development difficulty of the main device. At the same time, connecting multiple display modules to one MIPI TX port is prone to competition when reading data. When competition exists At this time, the MIPI connection between the host and all the display modules is controlled by the selection switch. At any point in time, only one MIPI connection between the display module and the host is connected at most. This method is likely to cause the main The connection complexity and control complexity between the device and the slave device may easily cause the instability of the display system

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