CN113963655B - High-reliability airborne display control system based on FPGA - Google Patents
High-reliability airborne display control system based on FPGA Download PDFInfo
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- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
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Abstract
The invention discloses a high-reliability airborne display control system based on an FPGA, which comprises: the discrete quantity and enabling control module comprises a discrete quantity acquisition module; the self-checking module comprises a detection frame freezing fault detection module, a power supply signal detection module, an over-temperature signal detection module and a discrete quantity signal monitoring module; the top signal module comprises a generation module of an internal picture, a video signal synchronization module, a video signal presence/absence detection module, a picture freezing detection module, a video signal time sequence parameter detection module and a video signal switching module; the top-layer LED module comprises an ambient light acquisition module and a brightness adjustment module. According to the invention, the functions of displaying the airborne video signals, controlling the brightness and self-checking are realized through the discrete quantity and enabling control module, the self-checking module, the top-layer signal module and the top-layer LED module, and the technical problem that the traditional airborne display equipment cannot monitor the circuit fault information in real time is solved.
Description
Technical Field
The invention relates to the field of airborne display control, in particular to a high-reliability airborne display control system based on an FPGA.
Background
The research and development of the civil aviation aircraft are important strategic decisions for constructing innovative countries and improving autonomous innovation capability in China, but the research and development of the civil aviation airborne electronic equipment in China are less. The working environment where the airborne electronics are located is very complex, so that the situation that the traditional airborne display control is unstable is caused, and how to monitor the faults of the airborne display system is very important.
In view of the foregoing, improvements in the technology of the original on-board display control system are urgently needed.
Disclosure of Invention
Object of the invention
The invention provides a high-reliability airborne display control system based on an FPGA, which is used for solving the technical problem of soundness of the existing fault monitoring technology of the airborne display system in the background technology.
Technical proposal
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a FPGA-based high reliability on-board display control system comprising: the discrete quantity and enabling control module comprises a discrete quantity acquisition module, a power-on sequence control module and a circuit state control module; the self-checking module comprises a detection frame freezing fault detection module, a power supply signal detection module, an over-temperature signal detection module and a discrete quantity signal monitoring module; the top signal module comprises a generation module of an internal picture, a video signal synchronization module, a video signal presence/absence detection module, a picture freezing detection module, a video signal time sequence parameter detection module and a video signal switching module; the top-layer LED module comprises a debugging communication module, a graphic processing carrier plate communication module, an ambient light acquisition module, a brightness parameter storage module, a fault parameter storage module and a brightness adjustment module;
the top layer signal module is connected with the self-checking module, the self-checking module is connected with the discrete quantity and enabling control module, the discrete quantity and enabling control module is connected with the top layer signal, and the top layer LED module is connected with the self-checking module;
the top signal module is connected with a video input signal and processes the video input signal, transmits self-checking bit data of timing sequence parameters of the video signal to the self-checking module, transmits picture freezing self-checking bit data to the discrete quantity and enabling control module, and derives a video output signal;
the self-checking module receives and processes the self-checking signal of the backlight driving circuit and the A/D value of the temperature sensor, transmits self-checking result data and temperature and voltage data to the top-layer LED module, and transmits over-temperature self-checking position and power supply self-checking position data to the discrete quantity and enabling control module;
the discrete quantity and enabling control module receives and processes the input discrete quantity signals, transmits video signals to the top signal module, and derives output discrete quantity signals and screen power supply and backlight enabling signals;
the top-layer LED module processes signals input and output by the debugging communication module, the graphic processing carrier plate communication module, the ambient light acquisition module, the brightness parameter storage module, the fault parameter storage module and the brightness adjustment module, and derives a day and night mode switching signal and a PWM signal.
Further, the input discrete quantity signals comprise LVDS encoding and decoding chip enabling control signals, screen power supply chip enabling control signals and backlight driving circuit enabling control signals, and the LVDS encoding and decoding chip enabling control signals, the screen power supply chip enabling control signals and the backlight driving circuit enabling control signals are led out after passing through the circuit state control module to output discrete quantity signals.
Further, the power signal detection module judges a 12V power state according to the 12V voltage data collected by the top LED module and outputs a 12V power state self-checking flag bit.
Further, the self-checking module judges the driving state of the backlight circuit according to whether the self-checking signal of the backlight driving circuit output by the board-level hardware is a pulse signal, and outputs the self-checking flag bit of the backlight driving circuit.
Further, the self-checking result data comprises video signal parameter self-checking result data and backlight driving circuit self-checking result data, and the temperature and voltage data comprises self-checking result data of signals such as working state self-checking result data of a temperature sensor circuit and a 12V power supply state.
Further, the over-temperature signal detection module reads out an A/D value of the temperature sensor through an SPI1 interface of the A/D chip, judges the working state of the temperature sensor circuit, outputs a self-checking flag bit of the temperature sensor circuit, then analyzes the current temperature data through temperature library mapping, judges the over-temperature state of the ambient temperature of the backlight circuit, and outputs the self-checking flag bit of the over-temperature state.
Further, the top signal module includes:
the generation module of the internal picture outputs standard HS, VS and DE signals of 1680X1050@60HZ, an internal video control signal, an internal video odd-way data signal and an internal video even-way data signal according to the input internal global clock signal, and outputs the signals to the signal switching module in the top-layer signal module;
the video signal synchronization module synchronizes video data and control signals to a global clk signal in the system through asynchronous cross-clock domain processing according to an externally input video signal source, and outputs the video data and the control signals to the video switching module in the top-layer signal module;
the video signal presence/absence detection module detects an externally input video control signal by using an internal system clock, judges a DE signal, generates a video signal presence/absence detection flag bit, and outputs the video signal presence/absence detection flag bit to the video signal switching module in the top signal module;
the picture freezing detection module judges the freezing fault of the display picture and outputs a picture freezing self-checking bit to the discrete quantity and enabling control module according to the discrete quantity and the video control input signal, the video odd-channel data input signal and the video even-channel data input signal which are input from the enabling control module and the video signal which are input from the outside;
the video signal timing sequence parameter detection module detects HS, VS and DE signals of an externally input video signal, judges whether the HS, VS and DE parameters have deviation or not, and outputs video signal timing sequence parameter self-checking bit data to the self-checking module;
the video signal switching module judges an internal video control signal, an internal video odd-way data signal and an internal video even-way data signal according to the existence of a detection zone bit of a video signal, outputs a video control output signal, a video odd-way data output signal and a video even-way data output signal, and transmits self-checking bit data of a timing parameter of the video signal to the self-checking module.
Further, the top layer LED module includes:
the debugging communication module is used for completing data receiving of parameters such as brightness and sending of data such as temperature, voltage and self-checking according to a communication protocol and data packet information of a debugging serial port and sending the data to the fault parameter storage module in the top-layer LED module;
the graphic processing carrier communication module is used for completing the receiving and sending of the brightness level and the self-checking data of the ambient light brightness according to the communication protocol and the data packet information of a GPC (graphic processing carrier) serial port;
the environment light acquisition module reads data acquired by the environment light sensor through an IIC bus, one path of the acquired data is output to a brightness adjusting module in the top-layer LED module, and the other path of the acquired data is output to a GPC (graphic processing carrier board) communication module in the top-layer LED module;
the brightness parameter storage module receives brightness data of the debugging communication module in the top-layer LED module, one path of the brightness data is stored into a corresponding address of the EEPROM through an SPI interface bus, and the other path of the brightness data is output to the brightness adjustment module in the top-layer LED module;
the fault parameter storage module analyzes fault information according to the self-checking result data and the temperature and voltage data input by the self-checking module, stores corresponding information parameters such as fault bit occurrence time and occurrence times of faults into the EEPROM through the SPI bus, and simultaneously executes the reading and resetting operation of the fault information according to the UART serial port sending instruction;
the brightness adjusting module outputs the PWM signal and the day-night mode switching signal with adjustable frequency in the red, green, blue and white 4-path day-night modes according to a dimming formula according to brightness parameters output by the brightness parameter storage module in the top-layer LED module, brightness level output by the GPC (graphic processing carrier plate) communication module in the top-layer LED module and ambient light data output by the ambient light collecting module in the top-layer LED module.
Beneficial effects of
Compared with the prior art, the invention has the beneficial effects that:
1. the invention realizes the functions of displaying the onboard video signals, controlling the brightness and self-checking through the discrete quantity and enabling control module, the self-checking module, the top-layer signal module and the top-layer LED module, thereby solving the problem that the traditional onboard display equipment cannot monitor the circuit fault information in real time, realizing the functions of effectively displaying the pictures in real time and automatically adjusting the brightness, and effectively improving the reliability and the safety of the system by the self-checking module added on the original system.
2. The invention realizes brightness control by debugging the functional modules such as communication, graphic processing carrier communication, ambient light collection, brightness parameter storage, fault parameter storage, brightness adjustment and the like.
3. The invention realizes the output of the internal video control signal and the internal video data through the internal picture generation module.
4. The invention realizes the synchronization of the externally input video signal to the global clk signal after the cross-clock domain processing through the video signal synchronization module.
5. The invention detects the external video input signal and judges whether the external input video signal is abnormal or not through the video signal presence/absence detection module.
6. The invention judges whether the display picture has freezing fault or not through the picture freezing detection module.
7. The invention realizes detecting whether the HS, VS and DE signals of the externally input video signals have deviation or not through the video signal time sequence parameter detection module.
8. The invention realizes the receiving of parameters such as brightness and the sending of data such as temperature, voltage, self-checking and the like by debugging the communication module.
9. The invention realizes the receiving and sending of the self-checking data of the brightness level number and the ambient light brightness through the graphic processing carrier communication module.
10. The invention realizes the reading of the ambient light data and the output of the data to the brightness adjusting module and the graphic processing carrier plate communication module through the ambient light collecting module.
11. The invention receives the brightness parameter data of the debugging communication module through the brightness parameter storage module, one path of data is stored in the EEPROM, and the other path of data is output to the brightness adjustment module.
12. According to the invention, through the fault parameter storage module, fault information analysis is carried out according to the input self-checking result, the fault information parameters are stored in the EEPROM, and meanwhile, the fault information reading and clearing are carried out according to the serial port sending instruction.
13. The invention outputs PWM signals and day-night mode switching signals according to a dimming formula according to brightness parameters, brightness progression and ambient light data through the brightness adjusting module.
Drawings
Fig. 1 is a circuit system diagram of a high reliability on-board display control system based on an FPGA.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Examples
Referring to fig. 1, a high reliability on-board display control system based on FPGA is characterized by comprising: the discrete quantity and enabling control module comprises a discrete quantity acquisition module, an electric sequence control module and a circuit state control module; the self-checking module comprises a detection frame freezing fault detection module, a power supply signal detection module, an over-temperature signal detection module and a discrete quantity signal monitoring module; the top signal module comprises a generation module of an internal picture, a video signal synchronization module, a video signal presence/absence detection module, a picture freezing detection module, a video signal time sequence parameter detection module and a video signal switching module; the top-layer LED module comprises a debugging communication module, a graphic processing carrier plate communication module, an ambient light acquisition module, a brightness parameter storage module, a fault parameter storage module and a brightness adjustment module;
the top layer signal module is connected with the self-checking module, the self-checking module is connected with the discrete quantity and enabling control module, the discrete quantity and enabling control module is connected with the top layer signal, and the top layer LED module is connected with the self-checking module;
the top signal module is connected with a video input signal and processes the video input signal, transmits self-checking bit data of timing sequence parameters of the video signal to the self-checking module, transmits the frozen self-checking bit data of the picture to the discrete quantity and enabling control module, and derives a video output signal;
the self-checking module receives and processes the self-checking signal of the backlight driving circuit and the A/D value of the temperature sensor, transmits self-checking result data and temperature and voltage data to the top-layer LED module, and transmits over-temperature self-checking position and power self-checking position data to the discrete quantity and enabling control module;
the discrete quantity and enabling control module receives and processes the input discrete quantity signals, transmits video signals to the top signal module, and derives output discrete quantity signals and screen power supply and backlight enabling signals;
the top LED module receives and processes signals of the debugging communication module, the graphic processing carrier plate communication module, the ambient light acquisition module, the brightness parameter storage module, the fault parameter storage module and the brightness adjustment module, and derives a day and night mode switching signal and a PWM signal.
Referring to fig. 1, the input discrete quantity signal includes an LVDS codec chip enable control signal, a screen power supply chip enable control signal, and a backlight driving circuit enable control signal, and the LVDS codec chip enable control signal, the screen power supply chip enable control signal, and the backlight driving circuit enable control signal derive an output discrete quantity signal after passing through a circuit state control module.
Referring to fig. 1, the power signal detection module judges the 12V power state according to the 12V voltage data collected by the top LED module, and outputs a 12V power state self-checking flag bit.
Referring to fig. 1, the self-checking result data includes video signal parameter self-checking result data and backlight driving circuit self-checking result data, and the temperature and voltage data includes self-checking result data of signals such as working state self-checking result data of a temperature sensor circuit and 12V power supply state.
Referring to fig. 1, an over-temperature signal detection module reads an a/D value of a temperature sensor through an SPI1 interface of an a/D chip, determines a working state of a temperature sensor circuit, outputs a temperature sensor circuit self-checking flag bit, then analyzes current temperature data through temperature library mapping, determines an ambient temperature over-temperature state of a backlight circuit, and outputs an over-temperature state self-checking flag bit.
Referring to fig. 1, the top-level signaling module includes:
the internal picture generation module outputs standard HS, VS and DE signals of 1680X1050@60HZ, an internal video control signal, an internal video odd-way data signal and an internal video even-way data signal according to an input internal global clock signal, and outputs the signals to the signal switching module in the top-layer signal module;
the video signal synchronization module synchronizes video data and control signals to a global clk signal inside the system through asynchronous clock domain crossing processing according to a video signal source input from the outside and outputs the video data and the control signals to the video switching module in the top-layer signal module;
the video signal presence/absence detection module detects an externally input video control signal by using an internal system clock, judges the DE signal, generates a video signal presence/absence detection flag bit, and outputs the video signal presence/absence detection flag bit to the video signal switching module in the top signal module;
the picture freezing detection module judges the freezing fault of the display picture and outputs a picture freezing self-checking bit to the discrete quantity and enabling control module according to the video signal output by the discrete quantity and enabling control module and the video control input signal, the video odd-channel data input signal and the video even-channel data input signal which are input externally;
the video signal timing sequence parameter detection module detects HS, VS and DE signals of an externally input video signal, judges whether the HS, VS and DE parameters have deviation or not, and outputs the video signal timing sequence parameter self-checking bit data to the self-checking module;
the video signal switching module judges the internal video control signal, the internal video odd-way data signal and the internal video even-way data signal according to the existence of the detection zone bit of the video signal, outputs a video control output signal, a video odd-way data output signal and a video even-way data output signal and transmits the self-checking bit data of the timing parameter of the video signal to the self-checking module.
Referring to fig. 1, the top-layer LED module includes:
the debugging communication module is used for completing data receiving of parameters such as brightness and sending of data such as temperature, voltage and self-checking according to a communication protocol and data packet information of a debugging serial port and sending the data to the fault parameter storage module in the top-layer LED module;
the graphic processing carrier communication module is used for completing the receiving and sending of the brightness level and the self-checking data of the ambient light brightness according to the communication protocol and the data packet information of a GPC (graphic processing carrier) serial port; the environment light acquisition module reads data acquired by the environment light sensor through the IIC bus, outputs one path of the acquired data to the brightness adjustment module in the top-layer LED module, and outputs the other path of the acquired data to the GPC (graphic processing carrier board) communication module in the top-layer LED module;
the brightness parameter storage module is used for receiving brightness data of the debugging communication module in the top-layer LED module, one path of the brightness data is stored into a corresponding address of the EEPROM through the SPI interface bus, and the other path of brightness data is output to the brightness adjustment module in the top-layer LED module;
the fault parameter storage module is used for carrying out fault information analysis according to the self-checking result data and the temperature and voltage data input by the self-checking module, storing corresponding information parameters such as fault bit occurrence time and occurrence times of faults into the EEPROM through the SPI bus, and simultaneously executing the reading and zero clearing operation of the fault information according to the UART serial port sending instruction;
and the brightness adjusting module is used for outputting a PWM signal and a day-night mode switching signal with adjustable frequency under 4 paths of day-night modes of red, green, blue and white according to a dimming formula according to brightness parameters output by the brightness parameter storage module in the top-layer LED module, brightness level output by the GPC (graphic processing carrier plate) communication module in the top-layer LED module and ambient light data output by the ambient light acquisition module in the top-layer LED module.
The specific implementation mode of the scheme is as follows:
the discrete quantity and enabling control module is mainly used for completing discrete quantity collection, power-on sequence control of all devices of the circuit and circuit working state control, input discrete quantity signals comprise LVDS encoding and decoding chip enabling control signals, screen power supply chip enabling control signals, backlight driving circuit enabling control signals and the like, the discrete quantity and enabling control module outputs discrete quantity signals after being controlled according to the circuit working state, the discrete quantity and enabling control module receives an over-temperature self-checking position and a power supply self-checking position (bit) from the self-checking module, and the discrete quantity and enabling control module receives a picture freezing self-checking position (bit) output from the top-layer signal module.
The self-checking module is connected with the discrete quantity and enabling control module, the top-layer LED module and the top-layer signal module, and is mainly used for detecting self-checking information such as picture freezing faults, power supply signals, over-temperature signals, discrete quantity signals and the like and outputting the self-checking information to the top-layer LED module. The self-checking module judges the driving state of the backlight circuit according to whether the self-checking signal of the backlight driving circuit output by the board-level hardware is a pulse signal or not, and outputs a self-checking marker bit of the backlight driving circuit; reading an A/D value of a temperature sensor through an SPI1 interface of the A/D chip, judging the working state of a temperature sensor circuit, outputting a self-checking marker bit of the temperature sensor circuit, then analyzing current temperature data through temperature library mapping, judging the over-temperature state of the ambient temperature of a backlight circuit, and outputting the self-checking marker bit of the over-temperature state; judging a 12V power supply state according to 12V voltage data acquired by the top LED module, and outputting a 12V power supply state self-checking flag bit; the self-checking module outputs the self-checking result data of the signals such as the video signal parameter self-checking result, the backlight driving circuit self-checking result, the working state self-checking result of the temperature sensor circuit, the 12V power supply state and the like to the top-layer LED module. And the self-checking module outputs temperature and voltage data to the top-layer LED module. The self-checking module outputs the over-temperature self-checking position and the power supply self-checking position to the discrete quantity and enables the control module. The self-checking module receives the video signal time sequence parameter self-checking bit (bit) output by the top signal module.
The top layer signal module is connected with the self-checking module and the discrete quantity and enabling control module, and mainly completes detection and processing of video signals, and comprises the functions of internal picture generation, video signal synchronization, video signal presence or absence detection, picture freezing detection, video signal time sequence parameter detection and the like. The internal picture generation module in the top-layer signal module outputs standard HS, VS and DE internal video control signals of 1680X1050@60HZ and internal blue odd-even video data mainly according to the input internal global clock signal, and outputs the signals to the signal switching module in the top-layer signal module; the video signal synchronization module in the top-layer signal module is mainly used for synchronizing video data and control signals to a global clk signal in the system through asynchronous cross-clock domain processing according to an externally input video signal source and outputting the video data and the control signals to the video switching module in the top-layer signal module; the video signal presence detection module in the top signal module detects an externally input video control signal by using an internal system clock, judges the DE signal, generates a video signal presence detection flag bit, and outputs the video signal presence detection flag bit to the video signal switching module in the top signal module; the picture freezing detection module in the top-layer signal module judges the freezing fault of the display picture and outputs a picture freezing self-checking position to the discrete quantity and enabling control module according to the discrete quantity and the video signal video output by the enabling control module and the video control signal, the video odd-channel data signal and the video even-channel data signal which are input from the outside; the video signal switching module in the top signal module judges whether to output an internal video control signal and internal odd-way and even-way video data or output an external video control signal and the odd-way and even-way video data according to whether the video signal has a detection zone bit or not; the video signal time sequence parameter detection module in the top signal module detects HS, VS and DE signals of an externally input video signal, judges whether the HS, VS and DE parameters have deviation or not, and outputs a video signal time sequence parameter self-checking bit (bit) to the self-checking module.
The top-layer LED module is connected with the self-checking module and mainly completes the functions of storing brightness parameters and fault parameters, collecting ambient light, adjusting brightness and communicating. The debugging communication module in the top-layer LED module receives data of parameters such as brightness and sends data such as temperature, voltage and self-checking according to the communication protocol and data packet information of the debugging serial port, and sends the data to the fault parameter storage module in the top-layer LED module; the graphic processing carrier plate communication module in the top LED module completes the receiving and sending of the brightness level and the self-checking data of the ambient light brightness according to the communication protocol and the data packet information of a GPC (graphic processing carrier plate) serial port; the ambient light acquisition module in the top-layer LED module reads the data acquired by the ambient light sensor through the IIC bus, one path of the acquired data is output to the brightness adjustment module in the top-layer LED module, and the other path of the acquired data is output to the GPC (graphic processing carrier board) communication module in the top-layer LED module; the brightness parameter storage module in the top-layer LED module receives brightness data of the debugging communication module in the top-layer LED module, one path of the brightness data is stored in a corresponding address of the EEPROM through the SPI interface bus, and the other path of the brightness data is output to the brightness adjustment module in the top-layer LED module; the fault parameter storage module in the top-layer LED module analyzes fault information according to the self-checking result data and the temperature and voltage data input by the self-checking module, stores corresponding information parameters such as fault bit occurrence time and occurrence times of faults into the EEPROM through the SPI bus, and simultaneously executes the reading and resetting operation of the fault information according to the UART serial port sending instruction; the brightness adjusting module in the top-layer LED module outputs a PWM signal and a day-night mode switching signal with adjustable frequency in a red, green, blue and white 4-channel day-night mode according to a dimming formula according to brightness parameters output by the brightness parameter storage module in the top-layer LED module, brightness level output by the GPC (graphic processing carrier plate) communication module in the top-layer LED module and ambient light data output by the ambient light collecting module in the top-layer LED module.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A high reliability on-board display control system based on an FPGA, comprising: the discrete quantity and enabling control module comprises a discrete quantity acquisition module, a power-on sequence control module and a circuit state control module; the self-checking module comprises a detection frame freezing fault detection module, a power supply signal detection module, an over-temperature signal detection module and a discrete quantity signal monitoring module; the top signal module comprises a generation module of an internal picture, a video signal synchronization module, a video signal presence/absence detection module, a picture freezing detection module, a video signal time sequence parameter detection module and a video signal switching module; the top-layer LED module comprises a debugging communication module, a graphic processing carrier plate communication module, an ambient light acquisition module, a brightness parameter storage module, a fault parameter storage module and a brightness adjustment module;
the top layer signal module is connected with the self-checking module, the self-checking module is connected with the discrete quantity and enabling control module, the discrete quantity and enabling control module is connected with the top layer signal, and the top layer LED module is connected with the self-checking module;
the top signal module is connected with a video input signal and processes the video input signal, transmits self-checking bit data of timing sequence parameters of the video signal to the self-checking module, transmits picture freezing self-checking bit data to the discrete quantity and enabling control module, and derives a video output signal;
the self-checking module receives and processes the self-checking signal of the backlight driving circuit and the A/D value of the temperature sensor, transmits self-checking result data and temperature and voltage data to the top-layer LED module, and transmits over-temperature self-checking position and power supply self-checking position data to the discrete quantity and enabling control module;
the discrete quantity and enabling control module receives and processes the input discrete quantity signals, transmits video signals to the top signal module, and derives output discrete quantity signals and screen power supply and backlight enabling signals;
the top-layer LED module processes the input and output signals of the debugging communication module, the graphic processing carrier plate communication module, the ambient light acquisition module, the brightness parameter storage module, the fault parameter storage module and the brightness adjustment module, and derives a day-night mode switching signal and a PWM signal;
the generation module of the internal picture outputs standard HS, VS and DE signals of 1680X1050@60HZ, an internal video control signal, an internal video odd-way data signal and an internal video even-way data signal according to the input internal global clock signal, and outputs the signals to the signal switching module in the top-layer signal module;
the video signal synchronization module synchronizes video data and control signals to a global clk signal in the system through asynchronous cross-clock domain processing according to an externally input video signal source, and outputs the video data and the control signals to the video switching module in the top-layer signal module;
the video signal presence/absence detection module detects an externally input video control signal by using an internal system clock, judges a DE signal, generates a video signal presence/absence detection flag bit, and outputs the video signal presence/absence detection flag bit to the video signal switching module in the top signal module;
the picture freezing detection module judges the freezing fault of the display picture and outputs a picture freezing self-checking bit to the discrete quantity and enabling control module according to the discrete quantity and the video control input signal, the video odd-channel data input signal and the video even-channel data input signal which are input from the enabling control module and the video signal which are input from the outside;
the video signal timing sequence parameter detection module detects HS, VS and DE signals of an externally input video signal, judges whether the HS, VS and DE parameters have deviation or not, and outputs video signal timing sequence parameter self-checking bit data to the self-checking module;
the video signal switching module judges an internal video control signal, an internal video odd-way data signal and an internal video even-way data signal according to the existence of a detection zone bit of a video signal, outputs a video control output signal, a video odd-way data output signal and a video even-way data output signal, and transmits self-checking bit data of a timing parameter of the video signal to the self-checking module;
the debugging communication module is used for completing data receiving of parameters such as brightness and sending of data such as temperature, voltage and self-checking according to a communication protocol and data packet information of a debugging serial port and sending the data to the fault parameter storage module in the top-layer LED module;
the graphic processing carrier communication module is used for completing the receiving and sending of the brightness level and the self-checking data of the ambient light brightness according to the communication protocol and the data packet information of a GPC (graphic processing carrier) serial port;
the environment light acquisition module reads data acquired by the environment light sensor through an IIC bus, one path of the acquired data is output to a brightness adjusting module in the top-layer LED module, and the other path of the acquired data is output to a GPC (graphic processing carrier board) communication module in the top-layer LED module;
the brightness parameter storage module receives brightness data of the debugging communication module in the top-layer LED module, one path of the brightness data is stored into a corresponding address of the EEPROM through an SPI interface bus, and the other path of the brightness data is output to the brightness adjustment module in the top-layer LED module;
the fault parameter storage module analyzes fault information according to the self-checking result data and the temperature and voltage data input by the self-checking module, stores corresponding information parameters such as fault bit occurrence time and occurrence times of faults into the EEPROM through the SPI bus, and simultaneously executes the reading and resetting operation of the fault information according to the UART serial port sending instruction;
the brightness adjusting module outputs the PWM signal and the day-night mode switching signal with adjustable frequency in the red, green, blue and white 4-path day-night modes according to a dimming formula according to brightness parameters output by the brightness parameter storage module in the top-layer LED module, brightness level output by the GPC (graphic processing carrier plate) communication module in the top-layer LED module and ambient light data output by the ambient light collecting module in the top-layer LED module.
2. The FPGA-based high reliability on-board display control system of claim 1, wherein: the input discrete quantity signals comprise LVDS encoding and decoding chip enabling control signals, screen power supply chip enabling control signals and backlight driving circuit enabling control signals, wherein the LVDS encoding and decoding chip enabling control signals, the screen power supply chip enabling control signals and the backlight driving circuit enabling control signals are led out after passing through the circuit state control module to output discrete quantity signals.
3. The FPGA-based high reliability on-board display control system of claim 2, wherein: and the power signal detection module judges the 12V power state according to the 12V voltage data acquired by the top-layer LED module and outputs a 12V power state self-checking flag bit.
4. A FPGA-based high reliability on-board display control system according to claim 3, wherein: the self-checking module judges the driving state of the backlight circuit according to whether the self-checking signal of the backlight driving circuit output by the board-level hardware is a pulse signal or not, and outputs a self-checking flag bit of the backlight driving circuit.
5. The FPGA-based high reliability on-board display control system of claim 1, wherein: the self-checking result data comprise video signal parameter self-checking result data and backlight driving circuit self-checking result data, and the temperature and voltage data comprise self-checking result data of signals such as working state self-checking result data of a temperature sensor circuit and 12V power supply state.
6. The FPGA-based high reliability on-board display control system of claim 1, wherein: the over-temperature signal detection module reads out an A/D value of the temperature sensor through an SPI1 interface of the A/D chip, judges the working state of the temperature sensor circuit, outputs a self-checking marker bit of the temperature sensor circuit, then analyzes the current temperature data through temperature library mapping, judges the over-temperature state of the ambient temperature of the backlight circuit, and outputs the self-checking marker bit of the over-temperature state.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103606363A (en) * | 2013-12-04 | 2014-02-26 | 中航华东光电有限公司 | LCD type helmet display driving circuit based on FPGA |
| CN105609021A (en) * | 2015-12-20 | 2016-05-25 | 苏州长风航空电子有限公司 | Quick detection method for aviation display |
| CN205540696U (en) * | 2016-01-20 | 2016-08-31 | 北京航宇天创科技发展有限公司 | Take display of self test function |
| WO2016201892A1 (en) * | 2015-06-16 | 2016-12-22 | 邦彦技术股份有限公司 | Fpga-based synchronous video switching system and method |
-
2021
- 2021-10-29 CN CN202111267155.8A patent/CN113963655B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103606363A (en) * | 2013-12-04 | 2014-02-26 | 中航华东光电有限公司 | LCD type helmet display driving circuit based on FPGA |
| WO2016201892A1 (en) * | 2015-06-16 | 2016-12-22 | 邦彦技术股份有限公司 | Fpga-based synchronous video switching system and method |
| CN105609021A (en) * | 2015-12-20 | 2016-05-25 | 苏州长风航空电子有限公司 | Quick detection method for aviation display |
| CN205540696U (en) * | 2016-01-20 | 2016-08-31 | 北京航宇天创科技发展有限公司 | Take display of self test function |
Non-Patent Citations (1)
| Title |
|---|
| 基于LVDS信号的视频图像亮度直方图叠加的FPGA实现;赵矿军;;玉溪师范学院学报(第04期);全文 * |
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