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A vehicle-mounted built-in TF map data updating circuit and method

A technology of map data and updating circuits, which is applied in the direction of electrical digital data processing, instruments, etc., can solve the problems that the navigation map cannot be used normally, is inconvenient to use, and affects the appearance of the equipment, so as to achieve convenient application, simple circuit, and reduce the trouble of disassembly Effect

Active Publication Date: 2019-05-28
XIAMEN YAXON NETWORKS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the convenience of map update, the existing equipment generally digs a hole near the built-in TF card during structural design and locks it with a cover or directly reserves a TF card hole. When the map needs to be updated, remove the cover , dial out the TF card to upgrade the map, which is inconvenient to use and affects the appearance of the device, and this method also has disadvantages for the protection of map data. For non-professionals, unplug the TF at will Data copying or other use, resulting in the navigation map not working properly, etc.

Method used

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  • A vehicle-mounted built-in TF map data updating circuit and method
  • A vehicle-mounted built-in TF map data updating circuit and method
  • A vehicle-mounted built-in TF map data updating circuit and method

Examples

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Embodiment Construction

[0032] see figure 1 As shown, in the present embodiment, a vehicle built-in TF map data update circuit includes:

[0033] HUB chip U1 is used to support extended multi-channel USB, including one USB input interface, one USB output interface and one SDIO interface; the one USB input interface includes USB positive signal input interface DP1 and USB negative signal input interface DM1; the USB The output interface includes a positive signal output interface DP and a negative signal output interface DM;

[0034] TF card interface circuit U2, used for storing navigation map data, is connected with described HUB chip U1 through SDIO interface;

[0035] The USB interface U3 on the navigation screen panel is connected with the user terminal (notebook computer, PC, handheld device, etc.) to receive the navigation map data to be updated; it includes a USB data terminal, and the USB data terminal includes a USB data positive signal interface DP And USB data negative signal interface D...

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Abstract

The invention discloses a vehicle-mounted built-in TF map data updating circuit and method. The method comprises: receiving a navigation map data updating instruction triggered by a liquid crystal display screen, controlling the liquid crystal display screen to pop up a password input window to receive password input; determining whether password entry is correct, if the entered password is correct, a general I / O port of the CPU microprocessor is controlled to output a high level; the interiors of the first high-speed USB analog switch and the second high-speed USB analog switch are simultaneously switched to a USB data end to be communicated with a second multiplexing source input end; wherein the TF card interface circuit is directly switched to the USB interface to wait for being connected with a user terminal for map upgrading, and if the input password is wrong, the GPIO0 of the CPU microprocessor is kept in a low-level state, and the first high-speed USB analog switch and the second high-speed USB analog switch are kept in a default state. The method can be applied to equipment with a vehicle-mounted navigation display screen with a built-in TF map card, and has the advantages of low cost, convenience for updating vehicle-mounted navigation map data at any time and the like.

Description

technical field [0001] The invention relates to the technical field of vehicle navigation screen control, in particular to a vehicle built-in TF map data update circuit. Background technique [0002] With the development of automotive electronics, multimedia navigation screens are increasingly used in vehicles. The multimedia navigation screen generally supports TF card, has navigation function and entertainment function of USB audio and video playback. Therefore, in the product design process of the multimedia navigation screen, in order to store navigation data and audio and video data separately, the device will be equipped with two TF cards, one for storing navigation data and one for storing audio and video sources. The navigation screen terminal device is affected by various factors such as structural limitations and easy to distinguish. Generally, the TF card for storing navigation data is built into the device or the back end of the device, and the TF card for stori...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F13/38G06F13/40
Inventor 兰伟华李琦汤益明李丽
Owner XIAMEN YAXON NETWORKS CO LTD
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