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; when the data is read and written, the master device sends a DSI data packet to the slave device; the master device and the slave devices carry out bus ownership transfer, in the transfer process, all the slave devices judge whether the read request data packets in the DSI data packets are matched or not, and the matched slave devices obtain the bus ownership and send data to the master device; and the unmatched slave devices firstly enter a data return monitoring state and execute corresponding operations, and further enter a bus ownership monitoring state and execute corresponding operations when the matched slave devices completely transmit the data and start to transfer the bus ownership. According to the invention, the development difficulty ofthe 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 the stability 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 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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