CN106598619A - Startup interface display control method for embedded system - Google Patents
Startup interface display control method for embedded system Download PDFInfo
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- CN106598619A CN106598619A CN201611195293.9A CN201611195293A CN106598619A CN 106598619 A CN106598619 A CN 106598619A CN 201611195293 A CN201611195293 A CN 201611195293A CN 106598619 A CN106598619 A CN 106598619A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/44—Arrangements for executing specific programs
- G06F9/4401—Bootstrapping
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/44—Arrangements for executing specific programs
- G06F9/451—Execution arrangements for user interfaces
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Abstract
The invention provides a startup interface display control method for an embedded system. The method comprises the following steps in sequence: S1, finishing preceding-stage boot, and entering backward-stage boot; S2, initializing a system display controller, so that the display controller displays a startup interface in a video memory space; S3, setting a startup command line parameter, and writing an initial address and the size of frame buffer, which at least includes the startup interface, of the video memory space into the startup command line parameter; and S4, starting the system, acquiring and resolving the startup command line parameter to obtain the initial address and the size of the frame buffer, building memory mapping of the frame buffer so that the system starts a physical address using the same frame buffer as the backward-stage boot, not reinitializing the display controller, and displaying the startup interface in the frame buffer. Through adoption of the startup interface display control method, display transition from boot to system startup can be finished without generation of broken screen or black screen, and the user experience can be improved.
Description
Technical field
The present invention relates to computer systems technology field, more particularly to be that a kind of embedded system starting-up interface shows control
Method processed.
Background technology
Embedded OS mainly has Vxworks, Linux, WinCE, OS20, Psos, u/COS-II, eCOS etc..Base
In the embedded system of Linux, realizing the startup of system needs multistage guiding, generally two-stage guiding, first order bootstrap
For code on MCU pieces, after start can automatic running, the second level be responsible for loading and run on external non-volatile storage medium is drawn
Helical pitch sequence；The second level guides the initialization of completion system necessaries, such as clock, outside storage controller etc., then loads
(SuSE) Linux OS mirror image, to start Linux system.
In order to lift Consumer's Experience, accelerate system boot interface display, need the display system start when the second level guides
Interface, and Linux can reinitialize LCD in start-up course, distribute the frame buffer address space of starting-up interface, write start
Interface image, this can cause starting-up interface of short duration Huaping phenomenon occur, affect Consumer's Experience.
In order to avoid Huaping phenomenon, current common practice is, in the frame buffer drive load of Linux, first to turn off backlight
Power supply, then drive initialization lcd controller, it would be desirable to again by backlight electric power after the starting-up interface picture write frame buffer of display
Open.This can make LCD of short duration blank screen occur, that is to say, that this is to replace flower screen to complete from the second level to be directed to using blank screen
The transition of linux system, can equally affect Consumer's Experience.
The content of the invention
The technical problem to be solved is to provide a kind of embedded system starting-up interface display control method, does not produce
Raw flower screen and blank screen just can complete that, from the display transition for being directed to system startup, Consumer's Experience can be improved.
To solve the above problems, the present invention proposes a kind of embedded system starting-up interface display control method, includes successively
Following steps：
S1：Prime guiding is completed, into rear class guiding；
S2：Initialization system display controller, so that display controller shows the starting-up interface in video memory space；
S3：Arrange start command line parameter, by video memory space including at least starting-up interface frame buffer initial address and
Size writes the startup command line parameter；
S4：Activation system, obtains and parses the startup command line parameter, obtains the initial address of the frame buffer and big
It is little, the internal memory mapping of frame buffer is set up, so that system starts with rear class guiding using the physical address of identical frame buffer, do not weigh
The display controller is newly initialized, the starting-up interface in the frame buffer is shown.
According to one embodiment of present invention, step S3 is comprised the following steps：
S31：Installed System Memory size is set, the Installed System Memory size be the size of former memory headroom deduct keep for it is described
The size of frame buffer；
S32：Add self-defined control option, in the self-defined initial address for controlling designated frame caching in option and greatly
It is little.
According to one embodiment of present invention, in step S4, the startup command line parameter is obtained and is parsed, obtain
The initial address and size of the frame buffer, comprises the following steps：
S41：Obtain the self-defined control option；
S42：The character string and the character string of size of the initial address of frame buffer are obtained from the self-defined control option；
S43：The character string of the character string of the initial address and size is respectively converted into into value type, the frame is obtained
The initial address and size of caching.
According to one embodiment of present invention, in step S4, the internal memory mapping of frame buffer, including following step are set up
Suddenly：
S44：The physical address of the frame buffer is determined according to the initial address and size of the frame buffer, the frame is delayed
The physical address translations deposited are virtual address, for the frame including at least starting-up interface that the system accesses the video memory space
Caching.
According to one embodiment of present invention, it is further comprising the steps of after the completion of internal memory mapping in step S4：
S45：It is effective to arrange initialisation identifications, to represent that rear class guiding has effectively initialized display controller.
According to one embodiment of present invention, in step S4, do not reinitialize the display controller, including with
Lower step：
S46：The control general-purpose interface of the display controller is not reconfigured；
S47：The readjustment detection initialisation identifications, if the parameter for effectively then no longer carrying out the display controller is matched somebody with somebody
Put.
According to one embodiment of present invention, in step S2, after rear class guiding starts, initialization system display control
Device, the picture of starting-up interface is loaded in the video memory space of internal memory from exterior storage medium, and display controller shows video memory
Starting-up interface in space.
According to one embodiment of present invention, in step S4, after setting up the internal memory mapping of frame buffer, initialization
Default frame buffer parameter object, and with driving from the initialized frame buffer parameter object to system registry frame buffer.
According to one embodiment of present invention, the prime guiding is first order guiding, and the rear class guiding is the second level
Guiding, the program of the first order guiding is code on piece, for loading and running second level guiding.
According to one embodiment of present invention, the system is (SuSE) Linux OS.
After above-mentioned technical proposal, the present invention has the advantages that compared to existing technology：
By way of kernel starts command parameter, the frame buffer initial address and size for using is distributed during rear class is guided
Operating system is passed to, makes rear class guiding and system use identical frame buffer physical address, so as to beginning to showing eventually
Starting-up interface in Same Physical address, reaches and does not need blank screen just can complete to be directed to the effect that system starts transition from rear class
Really, Consumer's Experience is improve, eliminates display controller and repeat the initialized time.
Description of the drawings
Fig. 1 is the schematic flow sheet of the embedded system starting-up interface display control method of one embodiment of the invention.
Specific embodiment
It is understandable to enable the above objects, features and advantages of the present invention to become apparent from, below in conjunction with the accompanying drawings to the present invention
Specific embodiment be described in detail.
Elaborate many details in order to fully understand the present invention in the following description.But the present invention can be with
Much it is different from alternate manner described here to implement, those skilled in the art can be in the situation without prejudice to intension of the present invention
Under do similar popularization, therefore the present invention is not embodied as being limited by following public.
Referring to Fig. 1, in one embodiment, embedded system starting-up interface display control method, successively including following step
Suddenly：
S1：Prime guiding is completed, into rear class guiding；
S2：Initialization system display controller, so that display controller shows the starting-up interface in video memory space；
S3：Arrange start command line parameter, by video memory space including at least starting-up interface frame buffer initial address and
Size writes the startup command line parameter；
S4：Activation system, obtains and parses the startup command line parameter, obtains the initial address of the frame buffer and big
It is little, the internal memory mapping of frame buffer is set up, so that system starts with rear class guiding using the physical address of identical frame buffer, do not weigh
The starting-up interface for newly initializing the display controller and showing in frame buffer.
In step sl, according to the startup of system what specifically needs guide to determine the prime guiding and rear class guiding
Respectively which level guiding.Prime guiding can be used to load operating rear class bootstrap, to guide into rear class, draw in prime
Other initialization of equipment or the guiding of other programs can also be realized in leading.Rear class guiding can be used to realize that system necessity sets
Standby initialization, loads kernel operating system, to realize the startup of system, in the process, also realizes the smooth of starting-up interface
Interim process control.
In one embodiment, system is (SuSE) Linux OS.
Can be identical with routine in prime guiding and the configuration of the non-display control section of rear class guiding and operation workflow, this
Invention seamlessly transits display by changing the display control section of rear class guiding realize starting-up interface.
In one embodiment, system starts needs two grades of guiding, and prime guiding is first order guiding, and rear class guiding is the
Two grades of guiding, the program of the first order guiding is code on piece, for loading and running second level guiding.
Then execution step S2, in rear class guiding, initialization system display controller, so that display controller shows video memory
Starting-up interface in space, display controller is for example but not limited to LCD (LCDs) controller, after initialization, video memory
Starting-up interface in space is continuously display on display controller.Initialization can include configuration backlight control general-purpose interface, match somebody with somebody
The parameter of lcd controller is put, but only in this, as example.
In one more specifically embodiment, in step S2, after rear class guiding starts, initialization system display controller,
The picture of starting-up interface is loaded in the video memory space of internal memory from exterior storage medium, display controller shows video memory space
In starting-up interface.This is interior to save as original internal memory, is not allocated by system.Other can also be deposited in video memory space for showing
The picture for showing, the picture of starting-up interface can also be more than one, starting-up interface is changed in order to user, when starting shooting every time
It is loaded into selected one to be shown.
Certainly, in step s 2, other ancillary equipment of system can also be initialized, such as clock, outside is deposited
Storage controller etc., the initialization of these equipment can be conventional initialization, will not be described here.
Then execution step S3, in rear class guiding, startup command line parameter is arranged according to the frame buffer of starting-up interface, will
Video memory space starts command line parameter including at least the initial address and size write of the frame buffer of starting-up interface, it is also possible to will be aobvious
Other buffer address writes in space are deposited, is used as other purposes in step below.
Then execution step S4, loads kernel operating system, and startup optimization system, what is arranged in system obtaining step S3 opens
Dynamic command line parameter, and parse to starting command line parameter, the initial address and size for obtaining frame buffer (obtains starting point
Location and size have obtained the memory space of frame buffer), the memory space of the frame buffer for obtaining is the physical address of starting-up interface,
The internal memory mapping of frame buffer is set up, is that virtual address (certainly, also may be used by other physical address during this by physical address translations
Together carry out internal memory mapping), and system using the virtual address of the frame buffer as starting-up interface address, so as to system can lead to
The physical address that virtual address is addressed to starting-up interface is crossed, system starts and rear class guiding uses identical frame buffer physically
Location, does not reinitialize display controller, the starting-up interface stored in the corresponding physical address of the virtual address is read, so as to still
Show the starting-up interface in former frame buffer.Also be not momentarily closed display controller due to not reinitializing, thus will not
Produce flower screen or blank screen.
By way of kernel starts command parameter, the frame buffer initial address and size for using is distributed during rear class is guided
Operating system is passed to, makes rear class guiding and system use identical frame buffer physical address, so as to beginning to showing eventually
Starting-up interface in Same Physical address, reaches and does not need blank screen just can complete to be directed to the effect that system starts transition from rear class
Really, Consumer's Experience is improve, eliminates display controller and repeat the initialized time.
In one embodiment, step S3 is further comprising the steps：
S31：Installed System Memory size is set, the Installed System Memory size be the size of former memory headroom deduct keep for it is described
The size of frame buffer；
S32：Add self-defined control option, in the self-defined initial address for controlling designated frame caching in option and greatly
It is little.
Starting-up interface is stored due to having distributed frame buffer in internal memory, thus in Memory Allocation, the address of the frame buffer
Still retain, only other remaining spaces are used as into internal memory, the remaining space can be that conventional internal memory deducts the present embodiment
Frame buffer after space.Self-defined control option is set, the initial address of frame buffer is transmitted by self-defined control option
With size to system, so can ensure that and guide other routine operations started with system to keep constant, implement more
For convenience, while system and rear class guiding can be made to share the Same Physical address of frame buffer.
In one embodiment, in step S4, the startup command line parameter is obtained and is parsed, obtain the frame buffer
Initial address and size, it is further comprising the steps：
S41：Obtain the self-defined control option；
S42：The character string and the character string of size of the initial address of frame buffer are obtained from the self-defined control option；
S43：The character string of the character string of the initial address and size is respectively converted into into value type, the frame is obtained
The initial address and size of caching.
In step s 4, rear class guiding has been loaded with system, in system starting process, gets in rear class guiding and sets
The self-defined control option put, parses the character string and the word of size of the initial address of frame buffer from self-defined control option
Symbol string, being transmitted in the way of character string can reduce address transmission mistake, be also easier to find mistake and correct mistake, lifted and passed
Efficiency is passed, then the character string for obtaining is converted to into value type, obtain can be used to the initial address of frame buffer that addresses and big
It is little, complete the address transmission between rear class guiding and system.
In one embodiment, in step S4, the internal memory mapping of frame buffer is set up, is comprised the following steps：
S44：The physical address of the frame buffer is determined according to the initial address and size of the frame buffer, the frame is delayed
The physical address translations deposited are virtual address, for the frame including at least starting-up interface that the system accesses the video memory space
Caching.
System obtains just can determine that whole physical address of frame buffer after the initial address and size of frame buffer, by these things
Reason address of cache is mapped to the space that internal memory keeps for frame buffer in internal memory, specifically, is converted to virtual address, and system reads
After virtual address, physical address can be accessed by address translation mechanism, such that it is able to read Same Physical address under
Starting-up interface is shown.
In one embodiment, it is further comprising the steps of after the completion of internal memory mapping in step S4：
S45：It is effective to arrange initialisation identifications, to represent that rear class guiding has effectively initialized display controller.
Step S45 is placed on after step S44, you can judge whether preceding step is all normally entered by initialisation identifications
OK, judge that display controller is initialized and the transmission of physical address is all normal, to carry out correcting aobvious in time under abnormal conditions
Show.
In one embodiment, in step S4, the display controller is not reinitialized, is comprised the following steps：
S46：The control general-purpose interface of the display controller is not reconfigured；
S47：The readjustment detection initialisation identifications, if the parameter for effectively then no longer carrying out the display controller is matched somebody with somebody
Put.
Display controller is, for example, backlit display screen controller, and it is backlight control interface to control general-purpose interface, and the interface is not
Reconfigure, occur without blank screen or other situations, initialized come the display controller before judging by adjusting back initialisation identifications
And subsequent address transmission whether success, parameter configuration need not be again carried out if success, realization seamlessly transits display, and if not into
Work(then still reconfigures display controller, it is to avoid follow-up to show chaotic.
In one embodiment, in step S4, after setting up the internal memory mapping of frame buffer, default frame is initialized
Cached parameters object, and drive one with other to the driving of system registry frame buffer with the initialized frame buffer parameter object
It is same to be loaded startup.
In the drive load of frame buffer, the physical address pointed by frame buffer parameter object with it is identical before this, it is not necessary to
Display controller is reinitialized, the starting-up interface before showing is continued to, it is to avoid colored screen or blank screen.
In a specific embodiment, using the at91sam9g45-ekes development boards of Atmel companies, secondary development board is adopted
Use at91sam9g45 processors, kernel is ARM926EJ-S, dominant frequency frequency 400MHz, DDR (Double Data Rate synchronous dynamic randoms
Memory) internal memory 64M, supports from SD card to start.
In the present embodiment, repaiied on the basis of the bootstrap3.5.4 and Linux2.6.30 that Atmel companies provide
Change the display control of the starting-up interface to realize the embodiment of the present invention, bootsrap, will be compiled used as second level bootstrap
Bootstrap and linux image files and starting-up interface copy in SD card, select from SD card to start, system can show nothing
The starting-up interface of flower screen or blank screen.
Comprise the following steps that：
Step 1：Bootsrap initializes LCD after starting, and starting-up interface picture is loaded in DDR internal memories and is shown from SD and is opened
Machine interface；
Step 2：Bootsrap arranges linux system and starts command line parameter, by the starting of Framebuffer (frame buffer)
Address and size write command line parameter；Concrete mode is that modification linux system starts command line parameter CONFIG_LINUX_
KERNEL_ARG_STRING；
Step 3：Linux resolve commands line parameter obtains Framebuffer base address, sets up internal memory mapping, initializes fb_
Info structures, drive to system registry Framebuffer, and do not initialize lcd controller.
Although the present invention is disclosed as above with preferred embodiment, it is not for limiting claim, any this area
Technical staff without departing from the spirit and scope of the present invention, can make possible variation and modification, therefore the present invention
The scope that protection domain should be defined by the claims in the present invention is defined.
Claims (10)
1. a kind of embedded system starting-up interface display control method, it is characterised in that comprise the following steps successively：
S1：Prime guiding is completed, into rear class guiding；
S2：Initialization system display controller, so that display controller shows the starting-up interface in video memory space；
S3：Arrange and start command line parameter, video memory space is included at least the initial address and size of the frame buffer of starting-up interface
Write the startup command line parameter；
S4：Activation system, obtains and parses the startup command line parameter, obtains the initial address and size of the frame buffer,
The internal memory mapping of frame buffer is set up, so that system starts the physical address with rear class guiding using identical frame buffer, not again
The display controller is initialized, the starting-up interface in the frame buffer is shown.
2. embedded system starting-up interface display control method as claimed in claim 1, it is characterised in that the step S3 bag
Include following steps：
S31：Arrange Installed System Memory size, the Installed System Memory size be the size of former memory headroom deduct keep for the frame delay
The size deposited；
S32：Add self-defined control option, the initial address and size of designated frame caching in the self-defined control option.
3. embedded system starting-up interface display control method as claimed in claim 2, it is characterised in that step S4
In, the startup command line parameter is obtained and parses, the initial address and size of the frame buffer are obtained, comprise the following steps：
S41：Obtain the self-defined control option；
S42：The character string and the character string of size of the initial address of frame buffer are obtained from the self-defined control option；
S43：The character string of the character string of the initial address and size is respectively converted into into value type, the frame buffer is obtained
Initial address and size.
4. the embedded system starting-up interface display control method as described in claim 1 or 3, it is characterised in that the step
In S4, the internal memory mapping of frame buffer is set up, comprised the following steps：
S44：The physical address of the frame buffer is determined according to the initial address and size of the frame buffer, by the frame buffer
Physical address translations are virtual address, and the frame including at least starting-up interface for accessing the video memory space for the system delays
Deposit.
5. embedded system starting-up interface display control method as claimed in claim 4, it is characterised in that step S4
In, it is further comprising the steps of after the completion of internal memory mapping：
S45：It is effective to arrange initialisation identifications, to represent that rear class guiding has effectively initialized display controller.
6. embedded system starting-up interface display control method as claimed in claim 5, it is characterised in that step S4
In, the display controller is not reinitialized, comprise the following steps：
S46：The control general-purpose interface of the display controller is not reconfigured；
S47：The readjustment detection initialisation identifications, if effectively then no longer carrying out the parameter configuration of the display controller.
7. embedded system starting-up interface display control method as claimed in claim 1, it is characterised in that step S2
In, after rear class guiding starts, initialization system display controller is loaded into the picture of starting-up interface from exterior storage medium
In the video memory space of internal memory, display controller shows the starting-up interface in video memory space.
8. embedded system starting-up interface display control method as claimed in claim 1, it is characterised in that in step S4
In, after setting up the internal memory mapping of frame buffer, default frame buffer parameter object is initialized, and joined with the initialized frame buffer
Number driving of the object to system registry frame buffer.
9. embedded system starting-up interface display control method as claimed in claim 1, it is characterised in that the prime guiding
For first order guiding, rear class guiding is second level guiding, and the program of first order guiding is code on piece, for loading and
The guiding of the operation second level.
10. embedded system starting-up interface display control method as claimed in claim 1, it is characterised in that the system is
(SuSE) Linux OS.
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| CN113127079A (en) * | 2021-04-13 | 2021-07-16 | 山东英信计算机技术有限公司 | Method, system and medium for managing BMC |
| CN113127079B (en) * | 2021-04-13 | 2023-01-10 | 山东英信计算机技术有限公司 | Method, system and medium for managing BMC |
| CN113691871A (en) * | 2021-08-19 | 2021-11-23 | 杭州国芯科技股份有限公司 | Method for optimizing startup picture display of set top box |
| CN113691871B (en) * | 2021-08-19 | 2023-04-14 | 杭州国芯科技股份有限公司 | Method for optimizing startup picture display of set top box |
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Application publication date: 20170426 |