Interactive display method of automobile combination instrument and vehicle-mounted information entertainment hostTechnical Field
The invention belongs to an interactive display design application scheme of automobile parts, and particularly relates to an interactive display method of an automobile combination instrument and a vehicle-mounted information entertainment host.
Background
As a common travel transportation means, automobiles are always a development goal, such as safety, convenience, intelligence and the like. In order to bring more convenient and intelligent information display and interactive experience for users, the functional display of the combination instrument assembly is more cool and various. Meanwhile, the support of a hardware platform needs to be correspondingly higher, the common practice is to improve the hardware application platform, and the conventional double-chip scheme of a singlechip and an SOC is adopted, so that the cost is higher. Also, the scheme is that (for example, a double-screen display vehicle-mounted information entertainment host, CN 201710004568.4) is used as a main body through the vehicle-mounted information entertainment host, a main control CPU and an MCU are communicated with an MCU of the instrument in a CAN and LVDS mode, and then display information is directly transmitted to an LCD display screen through the instrument MCU. The scheme is mainly controlled by a central control CPU. The MCU of the instrument makes simple program call, is integrated at the position of the screen end of the instrument, has longer LVDS transmission line with the main control of the automobile, is unstable in transmission, and has larger risk of display stability when the main control CPU of the automobile fails.
Disclosure of Invention
In order to realize the development of 3D dynamic effect display functions of the low-cost combination instrument, an interactive display method of the automobile combination instrument and the vehicle-mounted information entertainment host is designed, and the combination of a main board of the combination instrument and the vehicle-mounted information entertainment host enables the instrument to display dynamic effect logic driven by a 3D engine, so that the display effect of the high-platform instrument is achieved.
The technical scheme of the invention is as follows:
the invention provides an interactive display method of an automobile combination instrument and a vehicle-mounted information entertainment host, which comprises the following steps:
After being awakened, the combined instrument main board requests handshake with the vehicle-mounted information entertainment host;
after the handshake between the combined instrument main board and the vehicle-mounted information entertainment host is successful, judging whether the ignition gear of the whole vehicle is an ON gear or not;
If the ignition gear of the whole vehicle is the ON gear, the combined instrument main board initiates a video signal calling request to the vehicle-mounted information entertainment host;
the vehicle-mounted information entertainment host transmits the power-on power to the main board of the combination instrument based on the video signal calling request;
the combined instrument main board controls the instrument TFT to conduct the power-on operation and the power-on display.
Preferably, the combined instrument mainboard transmits the motor power to the instrument TFT for display through the LVDS line.
Preferably, the combination meter motherboard requests handshake with the in-vehicle infotainment host computer through a CAN signal.
Preferably, the vehicle-mounted infotainment host transmits the starting-up action to the combined instrument main board in an MIPI mode.
Preferably, in the process that the vehicle-mounted information entertainment host transmits the driving effect to the combined instrument main board, if the vehicle-mounted information entertainment host does not transmit the driving effect within a preset time, the vehicle-mounted information entertainment host stops transmitting the driving effect, and the vehicle-mounted information entertainment host triggers the combined instrument main board to control the instrument TFT to stop displaying the driving effect through a CAN signal.
Preferably, after finishing transmitting the starting effect, the vehicle-mounted information entertainment host sends an end signal to the combined instrument mainboard through the CAN signal to trigger the combined instrument mainboard to control the instrument TFT to stop displaying the starting effect.
The beneficial effects of the invention are as follows:
The combined instrument main board integrated with the MCU is used for main instrument conventional function display control, the vehicle-mounted information entertainment host at the vehicle terminal is responsible for a 3D dynamic effect display part, meanwhile, the combined instrument main board is designed inside the entertainment system host, is connected with the vehicle-mounted information entertainment host through higher-speed plug-in mipi communication, and then transmits display information to an instrument display screen through LVDS data.
The invention has the advantages of simple structure, low design weight, strong practicability, low cost and the like.
Drawings
FIG. 1 is a block diagram showing an interactive display system of an automobile combination meter and a vehicle-mounted infotainment host in the present embodiment;
Fig. 2 is a logic diagram of an interactive display system for implementing interactive display by using an automobile combination meter and a vehicle-mounted infotainment host in the embodiment.
Detailed Description
As shown in fig. 1, the present embodiment provides an interactive display system of an automobile combination meter, which relates to a meter TFT1, a combination meter motherboard 2, and a vehicle-mounted infotainment host 3.
The instrument TFT1 is used for receiving signals sent by the combined instrument main board 2 through LVDS lines and displaying signals input by the combined instrument main board 2.
The combined instrument main board 2 is used for program control and calling of instruments and interacts with the vehicle-mounted information entertainment host 3 through CAN signals. After receiving the video signal of the vehicle-mounted infotainment host 3, the received video signal is transmitted to the instrument TFT1 for display through the LVDS line by program calling.
The vehicle-mounted infotainment host 3 is used for transmitting a startup dynamic effect picture of the 3D engine to the combined instrument mainboard 2 in an MIPI mode after receiving a request signal of an instrument. The hardware platform of the combined instrument main board 2 is a single-chip SOC main chip, has the functions of conventional graphic processing, program control and the like, and can realize conventional functional interface display.
As shown in fig. 2, after the entire vehicle network wakes up, the functional logic is as follows:
1. And the handshake communication is that after the whole vehicle network wakes up, the combination instrument main board 2 and the vehicle-mounted information entertainment host 3 perform handshake interaction through CAN signals, and after the handshake is successful, subsequent information interaction and transmission CAN be performed. If the handshake is unsuccessful, the cluster motherboard 2 is not processing the request.
2. And video transmission, namely when the combined instrument main board 2 detects that the current display needs to call a video signal, the combined instrument main board 2 sends a starting request signal to the vehicle-mounted information entertainment host 3 through the CAN, and after receiving the signal, the vehicle-mounted information entertainment host 3 transmits starting power to the combined instrument main board 2 in an MIPI mode, and meanwhile, the combined instrument main board 2 processes the signal and then transmits the signal to the instrument TFT3 in an LVDS mode for terminal display.
3. And the ending instruction is that after the vehicle-mounted information entertainment host 3 finishes the transmission of the starting action, an ending signal is sent to the combined instrument main board 2 through a CAN signal, and the display of the instrument TFT3 is stopped immediately after the combined instrument main board 2 receives the ending instruction. If the vehicle-mounted infotainment host 3 does not transmit the finish driving effect within the specified time range, the combination meter main board 2 performs internal exception handling and forcibly finishes the display transmitted to the meter TFT3 so as to ensure coordination and synchronization among all the components.
The interactive display mainly comprises display displays such as startup animation, welcome function, full-screen navigation, theme transition switching, 3D scene of IACC and the like of the instrument, and the interactive display logic is consistent.
According to the scheme, the combination instrument and the vehicle-mounted information entertainment host are not independent controllers, but are combined and cooperatively developed through the combination instrument with a low platform and the conventional vehicle-mounted information entertainment host, so that the function display requirement of the terminal is met. The interactive design improves the user experience, and meanwhile, compared with a one-to-two design scheme, the interactive design is better in current cost, more mature and stable in technology and relatively reliable in hardware protection.