CN108513169B - Method for downloading starting program from chip, chip and liquid crystal television - Google Patents
Method for downloading starting program from chip, chip and liquid crystal television Download PDFInfo
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- CN108513169B CN108513169B CN201810298965.1A CN201810298965A CN108513169B CN 108513169 B CN108513169 B CN 108513169B CN 201810298965 A CN201810298965 A CN 201810298965A CN 108513169 B CN108513169 B CN 108513169B
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- 238000000034 method Methods 0.000 title claims abstract description 40
- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 23
- 238000004891 communication Methods 0.000 claims description 16
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 230000000977 initiatory effect Effects 0.000 claims 1
- 238000001514 detection method Methods 0.000 abstract description 8
- 239000000306 component Substances 0.000 description 15
- 238000005516 engineering process Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000006870 function Effects 0.000 description 5
- 238000007726 management method Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/443—OS processes, e.g. booting an STB, implementing a Java virtual machine in an STB or power management in an STB
- H04N21/4432—Powering on the client, e.g. bootstrap loading using setup parameters being stored locally or received from the server
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Abstract
The embodiment of the application discloses a method for downloading a starting program from a chip, the chip and a liquid crystal television, and the method comprises the following steps: determining a downloading identification in a chip starting program to be downloaded, wherein the downloading identification is arranged in the last byte of the chip starting program; downloading the chip starting program; and controlling the downloading of the chip starting program according to the detection result of the downloading identification. The downloading identification is arranged at the last byte of the chip starting program, and if the chip starting program fails to download, the information of the last byte cannot be detected. Accordingly, the chip cannot be started before the chip does not finish downloading the chip starting program, so that the register value cannot be changed. If no change in the download identification or the monitored register value is detected. The chip startup program is downloaded again, thereby preventing the problem of the failure of downloading the chip startup program.
Description
Technical Field
The application relates to the technical field of chip downloading, in particular to a method for downloading a starting program from a chip, the chip and a liquid crystal television.
Background
The TCON board is a liquid crystal panel driving board widely used in liquid crystal televisions, and mainly functions to convert image data signals (including RGB data signals, clock signals, and control signals) sent from a liquid crystal television main board into data signals capable of driving a liquid crystal screen, and then directly send the data signals to the SCOF IC of the liquid crystal screen. The TCON board is provided with a chip with an image processing function, when the liquid crystal television is started and powered on, the chip on the TCON board needs to download a starting program from a ROM in an internal processor of the liquid crystal television, and normal starting of the chip is completed according to the downloaded starting program.
Since the chip and the ROM on the TCON board are located in different areas, communication between the chip and the ROM needs to be established to realize normal downloading of the chip start-up program. As shown in fig. 1, the TCON IC chip and the ROM are both disposed on the PCB, an SPI (Serial Peripheral Interface) module is disposed in the TCON IC chip, the SPI is connected to the ROM, and the PCB is provided with an electronic circuit that provides a hardware channel for the internal chip to download the start program from the ROM. After the system is powered on, the chip sends a starting program downloading request to the ROM through the SPI module, and after the ROM receives the downloading request, the corresponding starting program is sent to the chip through an electronic circuit arranged on the PCB board, so that the downloading of the starting program is completed.
However, the electronic circuit of the PCB may have design defects or poor wiring design, which may cause an abnormal process of the chip download start program to result in a download failure. For example, the ideal line width of the electronic circuit of the PCB board is 1-3mm, the line impedance is 40m omega, and the normal downloading of the starting program can be completed under the parameters. Because the design of the line width of the electronic circuit designed actually is only 0.5mm, the line impedance is further increased to 100m omega, and the SPI power supply of the chip is insufficient, when the SPI module end is insufficient, the delay of a logic circuit in the chip is increased, the requirement of the chip download starting program retention time cannot be met, the download of the chip starting program fails, and the system startup cannot be started normally.
Disclosure of Invention
The application provides a method for downloading a starting program from a chip, the chip and a liquid crystal television, and aims to solve the problem that the system cannot be started normally due to the fact that the chip downloading starting program fails in the traditional technology.
In order to solve the technical problem, the embodiment of the application discloses the following technical scheme:
in a first aspect, an embodiment of the present application provides a method for downloading a start program from a chip, including: determining a downloading identification in a chip starting program to be downloaded, wherein the downloading identification is arranged in the last byte of the chip starting program; downloading the chip starting program; and controlling the downloading of the chip starting program according to the detection result of the downloading identification. The downloading identification is arranged at the last byte of the chip starting program, and if the chip starting program fails to download, the information of the last byte cannot be detected. If the download identification is not detected, the chip starting program is downloaded again, so that the problem of download failure of the chip starting program is prevented.
In a second aspect, an embodiment of the present application provides a chip, including: a processor; the memory is used for storing a chip starting program downloaded by the chip; the processor executes the method for downloading the starting program by the chip. The processor in the chip does not detect the downloading identification in the last byte of the chip starting program in the chip downloading starting program, and then the downloading of the chip downloading starting program is indicated to fail, so that the chip starting program is controlled to be downloaded again, the problem of the downloading failure of the chip starting program is prevented, and the chip can be started normally.
In a third aspect, an embodiment of the present application provides a liquid crystal television, including: a device television peripheral; the TCON board is arranged on the television main board in a built-in mode; the chip is arranged on the TCON board; after the liquid crystal television is started, the processor of the chip is powered on, communication is established with the ROM through the SPI of the chip, a method for downloading a starting program by the chip is executed, and downloading of the starting program by the chip is controlled. After the television is powered on, the TCON board on the television main board starts to work, the chip on the TCON board downloads the chip starting program so that the television can normally work, and after the chip is powered on, the chip starting program is controlled to be downloaded according to the download identification in the chip starting program, so that the successful download of the chip starting program is ensured, and the liquid crystal television can normally run when being powered on.
Drawings
In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without any creative effort.
FIG. 1 is a diagram illustrating a prior art TCON board and ROM communicating with a download chip start program;
fig. 2 is a schematic flowchart of a method for downloading a start-up program from a chip according to the present application;
fig. 3 is a schematic structural diagram of a chip start-up procedure provided in the present application;
fig. 4 is a schematic structural diagram of a chip provided in the present application;
fig. 5 is a schematic structural diagram of a liquid crystal display television provided in the present application.
Detailed Description
The present application will be described in detail below with reference to the accompanying drawings.
As shown in fig. 2, a schematic flow chart of a method for downloading a boot program for a chip provided by the present application is shown, and as shown in fig. 2, an embodiment of the method for downloading a boot program for a chip provided by the present application includes:
s101, determining a downloading identifier in a chip starting program to be downloaded.
After the system is powered on, the chip can be started only by a corresponding chip starting program, and enters a normal working state, so that the normal function of the chip is realized. Because the internal storage space of the chip is limited, the chip start program is generally stored in the ROM before the chip is not started, as shown in fig. 3, the chip start program is a program code including a plurality of field information, including a field header, a function field, and a field trailer of the program, and the chip start program in the present application has identification information set as a download identification in the last byte of the field trailer.
Before downloading the chip start program, the chip first sends an information request for acquiring the chip start program to be downloaded to the ROM, for example, requests to acquire field length information of the chip start program and a download identifier of the last byte of the field tail. After receiving the request information sent by the chip, the ROM acquires a corresponding chip starting program according to the type of the chip, and then sends length information corresponding to the chip starting program and the carried download identification information to the chip. After receiving the feedback information sent back by the ROM, the chip starts to request to download the chip starting program.
S102, downloading a chip starting program.
After the chip starts to request for downloading the starting program, the ROM receives the program downloading request sent by the chip, and then the chip starting program corresponding to the downloading request is sent to the chip. Because the chip starting program is a functional program, needs downloading time and cannot realize instant downloading, the chip can detect the downloading identification according to a preset detection time interval in the whole downloading process.
S103, controlling the chip to start the downloading of the program according to the detection result of the downloading identification.
In S102, the chip detects the download identifier according to a preset time interval, and determines whether the chip start-up program has been successfully downloaded according to the detection result. If the downloading identification in the chip starting program is detected in the downloading process, the chip starting program is completely downloaded. Because the chip can not be started for a long time, if the chip is not started after a long time delay, the corresponding device can not be started normally, and the user experience is influenced for the user plane.
Therefore, in this embodiment, a preset time period is set, if the download identifier is not detected within the preset time period, at this time, the chip start program may still be in the download, and because the download time already exceeds the normal download time, the current download will be terminated, the download request will be resent to the ROM, and the start program will be re-downloaded.
For example, if the maximum startup time of the chip in the history is 500ms, the preset time period is set to 500 ms. If the download identifier in the chip start program is not detected or the detected identifier information is different from the download identifier in 500ms, the chip start program may have a download error including a download failure or a download delay, and at this time, the current operation needs to be terminated and a re-download request needs to be sent to the ROM again.
In an exemplary embodiment, the chip start program is provided with a flag bit, and the flag bit changes after the chip download start program finishes downloading, and the changed flag bit is set as the target identifier. If the mark position is detected in the preset time period, namely the downloading identification is different from the target identification, the chip starting program downloading failure can be directly judged, and at the moment, the downloading request needs to be sent to the ROM again to download the starting program again.
For example, the flag bit at the moment when the chip start program is not downloaded is 0, and the flag bit becomes 1 after the downloading is successful. The mark bit information detected in the starting program of the download chip is defined as a download identifier, and the mark bit information after the download is successful is defined as a target identifier. If the detected flag bit is always 0 within a preset time period, which is assumed to be 500ms, the chip start program fails to download.
In an exemplary embodiment, the download identifier may also be detected after a preset time period, where the historical longest start time of the chip in the above example is 500ms, the preset time period is set to 500ms, the download identifier is detected after 500ms, and if the download identifier is not detected or the detected download identifier is different from the target identifier, it may be determined that the download of the chip start program fails, and the download request is sent to the ROM again to download the start program again. In the above embodiments, two possible situations exist for determining that the chip boot program fails to be downloaded, which can be specifically referred to the description of the foregoing embodiments and are not described herein again.
It can be known from the foregoing embodiment that, in the method for downloading a chip startup program provided in this embodiment, a download identifier in the chip startup program is detected, where the download identifier is set in the last byte of the chip startup program, and if the chip startup program fails to download, information of the last byte is not detected. If the download identification is not detected or the detected download identification is different from the target identification, the chip startup program is downloaded again, so that the problem of failure in downloading the chip startup program is prevented.
Further, corresponding to the embodiment, the download identifier is detected within the preset time period, in the embodiment of the present application, a change state of a register value inside the chip is detected at the same time, because the download identifier in the chip start program is detected according to the preset time interval, if the nth detection is not completed and the (N + 1) th detection is not reached, the chip start program is already downloaded, but the download identifier indicating that the chip start program is completely downloaded is not detected, so that if the chip start program is simply detected according to the download identifier, it cannot be completely determined whether the chip start program is completely downloaded.
At this time, although the download identifier is not detected, since the chip start program has been downloaded, the chip enters a start state, the register value inside the chip changes according to the operating state of the chip, and the register value of the chip changes. Therefore, while the S1O1 chip sends an information request to the ROM, the register value of the chip itself is obtained, because the register value can directly indicate whether the chip is normally started. For example, the register value is 0 before the chip is not started, and the register value becomes 1 when the chip is normally started after the chip start program is downloaded. The above description is only exemplary, and other changes of the status indicators are also possible, and are not limited in detail herein.
If the download identifier is not detected or the detected download identifier is different from the target identifier within the preset time period, and the value of the register is not changed, the chip start program may still be in the process of downloading, and also because the downloading time exceeds the normal downloading time, the current downloading may be terminated, the download request is retransmitted to the ROM, and the start program is downloaded again. For example, as illustrated in S103, the longest startup time of the chip in the history is 500ms, and the preset time period is set to 500 ms. If the value of the register still maintains the original state information within 500ms and no change occurs, and the chip start program may be downloaded in error, the current operation is terminated, and a re-download request is sent to the ROM again.
Before the chip finishes downloading the chip starting program, the chip cannot be started, and the register value cannot be changed. Therefore, the change state of the internal register value of the chip is detected while the download identifier in the chip starting program is detected, and the download failure of the chip starting program is further prevented.
The method and the device can also realize the segmented downloading of the chip starting program according to the field information of the chip starting program acquired in the earlier stage. For example, when the download identifier is not detected in the preset time period, the field length information of the downloaded chip start program is acquired at the time, and the download request of the remaining fields is sent to the ROM according to the acquired original field information of the chip start program. Of course, the above downloading method also needs to complete the splitting of the program field and the splicing of the program field by the chip internal processor in the ROM.
Corresponding to the method for downloading the start-up program from the chip provided by the above embodiment, the present application further provides an embodiment of a chip, and as shown in fig. 4, a schematic structural diagram of a chip provided by the present application is provided.
Referring to fig. 4, a chip 200 provided in the embodiment of the present application includes a processor 201 inside the chip and a memory 202 of the chip. The chip further comprises a chip motherboard and an electronic circuit, the processor 201, the memory 202 and the electronic circuit are arranged on the chip motherboard, and the chip motherboard comprises all chip components packaged in a chip housing, and a plurality of chip pins are arranged around the chip housing to realize communication between the chip and the equipment motherboard.
The processor 201 is provided with a micro memory therein, and is used for storing programs, and the programs may include program codes, and the program codes include computer operation instructions. The micro memory may include a Random Access Memory (RAM), and may further include a non-volatile memory (non-volatile memory), such as at least one disk memory. Only one processor is shown, although the micro memory may be a plurality of microprocessors, as desired. And a microprocessor for reading the program code stored in the memory. The memory 202 is used for temporarily storing the chip start-up program downloaded from the chip, and the chip start-up program in the memory 202 is immediately released after the chip is started up.
When the chip 200 is powered on, in order to ensure the normal start of the chip 200, the processor 201 executes a method for downloading a program, determines a download identifier in a chip start program to be downloaded, and the download identifier is set in the last byte of the chip start program; and downloading the chip starting program, detecting the downloading identification in the downloading process, and controlling the downloading of the chip starting program according to the detection result of the downloading identification.
The processor in the chip does not detect the download identification in the last byte of the chip starting program in the chip download starting program, which indicates that the chip download starting program fails to download, and also detects the state information of the register value in the chip, if the chip download starting program fails, the register value in the corresponding chip will not change. Therefore, the chip starting program is controlled to be downloaded again, the problem of failure in downloading the chip starting program is prevented, and the chip can be started normally.
Corresponding to the embodiment, the application also provides an embodiment of the liquid crystal television. Referring to fig. 5, for an lcd tv 300 provided in an embodiment of the present application, the lcd tv 300 may include one or more of the following components: a television motherboard 301, a television processor 302, a TCON board 303, power components 304, input/output (I/O) interfaces 305, and communication components 306.
The chip 200 is fixedly arranged on the TCON board 303, the television processor 302 and the TCON board 303 are arranged on the television main board 301, and the television processor 302 and the TCON board 303 are in communication.
The television main board 301 is a core component of the lcd television 300, and is a carrier of important components inside the lcd television 300 and a foundation for ensuring the normal operation of the lcd television 300. Where the television processor 302 generally controls the overall operation of the lcd television 300, such as service processing, server communication, the television processor 302 may include one or more processors to execute instructions to perform all or part of the steps of the method described above. Further, the television processor 302 may include one or more modules, interactions between the television processor 302 and other components.
The TCON board 303 is mainly used for processing the LVDS image data input signal sent from the digital board inside the lcd tv, converting the processed LVDS image data input signal into an LVDS signal capable of driving the lcd screen, and then directly sending the LVDS signal to the LVDS receiving chip of the lcd screen. The chip 200 disposed on the TCON board 303 has an image processing function, and after the lcd television 300 is powered on, the chip 200 on the TCON board 303 needs to download a chip start program from the ROM in the lcd television internal television processor 302, and complete normal start of the chip 200 according to the downloaded start program.
The power supply component 304 provides power to the various components of the lcd-tv 300. Power components 304 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for lcd-tv 300.
The I/O interface 305 provides an interface between the television motherboard 301 and peripheral interface modules, such as a keyboard, click wheel, buttons, etc. These buttons may include, but are not limited to: a home button, a volume button, a start button, and a lock button.
The communication component 306 is configured to facilitate wired or wireless communication between the lcd-tv 300 and other devices. The lcd tv 300 may access a wireless network based on a communication standard, such as WiFi, 2G or 3G, or a combination thereof. In an exemplary embodiment, the communication component 306 receives a broadcast signal or broadcast related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 306 further includes a Near Field Communication (NFC) module to facilitate short-range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, Ultra Wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.
In an exemplary embodiment, a non-transitory computer readable storage medium, such as a memory, including instructions executable by a television processor 302 on a television motherboard 301 within a liquid crystal television 300 is also provided. For example, the non-transitory computer readable storage medium may be a ROM, a Random Access Memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like.
As can be seen from the above embodiments, the present embodiment provides a liquid crystal television 300, including: a television motherboard 301, a television processor 302, a TCON board 303, power components 304, input/output (I/O) interfaces 305, and communication components 306. The chip 200 is arranged in the TCON board 303, after the liquid crystal television 300 is started and powered on, the TCON board 303 on the television main board 301 starts to work, the chip 200 arranged on the TCON board 303 downloads a chip starting program to enable the television to normally work, and after the chip 200 is powered on, the chip starting program is controlled to be downloaded according to a download identifier in the chip starting program and a register value in the chip 200, so that the successful downloading of the chip 200 starting program is ensured, and the liquid crystal television normally starts to run.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The same and similar parts among the various embodiments in the specification of the present application may be referred to each other. Particularly, for the chip and lcd tv embodiments, since the method of downloading the start-up program by the chip is basically similar to the embodiment of the method of downloading the start-up program by the chip, the description is relatively simple, and for the relevant points, refer to the description in the embodiment of the method of downloading the start-up program by the chip.
The above-described embodiments of the present application do not limit the scope of the present application.
Claims (5)
1. A method for downloading a boot program from a chip, the method comprising:
determining a downloading identification in a chip starting program to be downloaded, wherein the downloading identification is arranged in the last byte of the chip starting program;
downloading the chip starting program;
whether a downloading identification of the chip starting program is detected or not according to a preset time interval in a preset time period, wherein the preset time period is the historical longest starting time of the chip;
when the downloading identification of the chip starting program is detected in the preset time period, detecting whether the downloading identification is the same as the target identification;
when the downloading identification is detected in the preset time period and the downloading identification is the same as the target identification, the chip starting program is downloaded completely;
when the downloading identification of the chip starting program is not detected in the preset time period, detecting the change state of the internal register value of the chip;
when detecting that the value of the register in the chip changes in the preset time period, finishing downloading the chip starting program;
when the download identification is not detected in the preset time period and the value of the register in the chip is not changed, or when the download identification is detected in the preset time period and the download identification is different from the target identification, the field of the downloaded chip starting program is acquired, and the continuous downloading of the residual field of the chip starting program is controlled.
2. The method for chip downloading startup procedure according to claim 1, wherein the determining the downloading identifier in the chip startup procedure to be downloaded includes:
sending a request for acquiring information of a starting program of a chip to be downloaded to a ROM;
determining byte information of the chip starting program according to the received feedback information sent back by the ROM;
and determining the identification information carried by the last byte of the chip starting program according to the byte information, and taking the identification information as the downloading identification.
3. A chip, comprising:
a processor;
the memory is used for storing a chip starting program downloaded by the chip;
the processor performs the method of chip download initiation program as claimed in any of claims 1-2.
4. The chip of claim 3, further comprising: and the SPI module is used for establishing communication between the chip and the ROM and downloading the starting program.
5. A liquid crystal television, comprising:
a device television peripheral;
the TCON board is arranged on the television main board in a built-in mode;
the chip of claim 3 or 4, the chip disposed on the TCON board;
after the liquid crystal television is started, the processor of the chip is powered on, communication is established between the SPI of the chip and the ROM, a method for downloading a starting program by the chip is executed, and downloading of the starting program by the chip is controlled.
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