Controller program downloading circuit

A program downloading and controller technology, which is applied in the direction of program control, computer control, general control system, etc., can solve the problems of download program influence, external circuit complexity, and inability to connect, so as to provide reliability, increase reliability, and ensure smooth operation effect

Inactive Publication Date: 2014-12-17
SHAANXI FAST GEAR CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, due to the relatively high timing requirements in the download of the retarder controller, the external circuit is also relatively complicated
When the timing is affected by interference signals, it will affect the download program, resulting in download errors or failure to connect.

Method used

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  • Controller program downloading circuit

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Embodiment Construction

[0012] The present invention is described in further detail below in conjunction with accompanying drawing:

[0013] see figure 1 and figure 2 , the present invention includes a watchdog reset circuit and an amplifying circuit both connected to the controller; the circuit protection is realized through the watchdog circuit, and the working mode of the watchdog circuit is controlled by setting the high and low levels of TEST and WDT; the amplifying circuit is connected through the serial port The bus interface is connected with the controller to realize the conversion of RS232 level and TTL level. By setting the working mode of the controller, the controller enters the UART Bootloader mode.

[0014] Such as figure 1 As shown, IMP706 is a programmable watchdog chip, mainly to control system reset. Ensure the normal operation of the system; the two pins of RESI-P and RES-P are the signals of the main chip to control its working mode and configuration; the watchdog reset circu...

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Abstract

The invention discloses a controller program downloading circuit. The controller program downloading circuit comprises a watchdog reset circuit and an amplification circuit both connected with a controller. Circuit protection is realized through the watchdog circuit; the working mode of the watchdog circuit is controlled through setting high and low electric levels of both TEST and WDT; the amplification circuit is connected with the controller through a serial pot bus interface to realize conversion between a RS232 electric level and a TTL electric level; the controller is enabled to be in a UART Bootloader mode through setting the working mode of the controller. The controller program downloading circuit solves the instability of using a serial port for downloading in a controller program downloading process, selects a reliable downloading mode, is convenient for subsequent maintenance and upgrading, saves cost and provides reliability as the bootload circuit is improved currently, and improves the system stability as the original triode is replaced by an MAX223 circuit and the TTL electric level is used for controlling each timing sequence pin.

Description

technical field [0001] The invention belongs to the technical field of electric control systems, and relates to a program downloading circuit, in particular to a controller program downloading circuit. Background technique [0002] With the development of modern automobiles, there are more and more types and quantities of automotive electronic equipment, and the integration of intelligent control of the whole vehicle is higher. The program upgrade and download of each controller has become a technical problem. Therefore, in order to reduce external influences and facilitate program upgrades, it is necessary to effectively prevent external interference on the circuit, optimize the design of the existing circuit, and improve the practicability and stability of the electronic device. At present, due to the relatively high timing requirements in the design of the retarder controller, the external circuit is also relatively complicated. When the timing is affected by interferenc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/042
Inventor 史波峰
Owner SHAANXI FAST GEAR CO
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