A communication method for a vehicle-mounted high-definition camera
A high-definition camera and communication method technology, applied in the field of automotive electronics, can solve the problems of receiving control signals and inability to achieve the effect of rich functions
Active Publication Date: 2021-06-08
ZHEJIANG WODELL TECH
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- Abstract
- Description
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- Application Information
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Problems solved by technology
[0003] The present invention mainly solves the technical problem that the vehicle-mounted camera in the prior art can only output signals to the host computer, but cannot receive control signals without adding wiring harnesses, and provides a single-wire to realize two-way transmission of video signals and control signals, so that A communication method for a vehicle-mounted high-definition camera that can receive control signals from a vehicle-mounted host computer
Method used
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Experimental program
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Embodiment
[0036] Embodiment: a vehicle-mounted high-definition camera communication method, comprising the following steps:
[0037] S1. When the slave machine does not receive any data, it is in an idle state;
[0038] S2. The master sends the synchronization segment to the slave, and the slave judges whether it is the synchronization segment 0x79 after receiving the data in the idle state. If it is, the slave state is set to the address receiving state, otherwise it remains in the idle state;
[0039] S3. When the slave is in the address receiving state, after receiving the data, judge whether the data is the address segment and the read-write mark 0x6C (write) or 0x6D (read), if it is the address segment and the read-write mark and the address segment is the local machine address, the slave state is set to receive the protected ID state, otherwise re-enter the idle state;
[0040] S4, when the slave machine is in the state of receiving the protected ID, after receiving the data, it ...
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The invention discloses a communication method for a vehicle-mounted high-definition camera. The communication protocol frame sequentially includes a synchronization segment, an address segment, a read-write mark, a protected ID segment, a data length segment, a data segment, and a check byte segment. The received address segment and the read-write flag determine whether to read or write in the future, so as to realize the two-way transmission of information. This solution allows the slave machine to receive the control signal from the vehicle host, enriches the functions of the reversing camera, and realizes functions such as dynamically displaying the reversing auxiliary line according to the steering wheel angle signal, switching the viewing angle of the reversing image, and providing diagnostic services without adding control signal lines and connectors. , which enriches the functions of the ordinary backup camera and greatly improves the competitiveness of the product. This solution is applicable to all vehicle imaging devices.
Description
technical field [0001] The invention relates to the field of automotive electronics, in particular to a communication method for a vehicle-mounted high-definition camera capable of bidirectionally transmitting signals. Background technique [0002] In order to make it easier for the driver to understand the obstacles behind the vehicle, the vehicles currently on the market are all equipped with a high-definition camera for reversing assistance. The most common video transmission interface solution in the reversing auxiliary camera is a (LVDS) interface with a lower signal amplitude and a differential architecture that can greatly reduce electromagnetic radiation, but the existing LVDS-based vehicle cameras on the market mainly only have video images. Ordinary cameras with output functions can only output fixed-angle video images to the vehicle-mounted host to assist the driver in reversing. The function is relatively single, and the camera cannot receive control or diagnosti...
Claims
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IPC IPC(8): H04N5/232
CPCH04N23/66
Inventor 袁鹏辉梁召伟潘勇明
Owner ZHEJIANG WODELL TECH