CN101267623A - A booting construction method for a mobile phone - Google Patents
A booting construction method for a mobile phone Download PDFInfo
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- CN101267623A CN101267623A CNA2008100359659A CN200810035965A CN101267623A CN 101267623 A CN101267623 A CN 101267623A CN A2008100359659 A CNA2008100359659 A CN A2008100359659A CN 200810035965 A CN200810035965 A CN 200810035965A CN 101267623 A CN101267623 A CN 101267623A
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Abstract
The invention belongs to the mobile communication technology field, relates to a construction method of a handset bootloader, especially, relates to a design method of the bootloader in a Linux intelligent handset. The method of the invention not only can realize equipment initialization after the handset is electrified and then complete loading start of a Linux inner core, but also can be interconnected with the Windows system. Simple and rapid download of system softwares is realized by a USB2.0 protocol, mass and automatic download in each USB channel can be performed while supporting download of multi-USB, thereby the method is suitable for mass-production and can help developers to debug bottom sofewares and hardwares conveniently.
Description
Technical field
The invention belongs to the mobile communication technology field, the construction method that relates to a kind of handset starting guiding, the method for designing of BootLoader in particularly a kind of Linux smart mobile phone, can be easily and the Windows system interconnect, carry out hardware detection and download the method for cell phone software by BootLoader.
Background technology
For computer system, powering on os starting from start need a bootup process.The embedded Linux system that is applied at present in the smart mobile phone be unable to do without boot equally, and this boot just is called Bootloader.Bootloader (Boot loader) is one section small routine carrying out before the (SuSE) Linux OS operation, is first important step of software development.By this section small routine, we can initiating hardware equipment, set up the mapping table of memory headroom, thereby set up suitable system hardware and software environment, for final call operation system kernel ready.It also has important effect in addition, finishes the download of resource in the Linux mobile phone, as kernel, root file system and upper application software.Support the BootLoader of linux system all to have the function that loads the startup linux kernel and download the mobile phone side software.If the control mobile phone enters downloading mode, at first to log on mobile phone by SSH or Telnel from the PC end, when BootLoader starts, input keyboard message, BootLoader just enters downloading mode after receiving this message, and the transmission of data can be passed through UART or USB, needs to strike order after finishing and finishes programming, if input error causes very dangerous consequence sometimes.
Support that now the mobile phone of linux system all is intelligent machine or high terminal, need downloaded software to be divided into several parts, and very big, and such downloading process can not satisfy the needs of large-scale production far away.In addition, the function of BootLoader is also comparatively single, has only realized some basic functions, can not carry out the substantial work of some mobile phone sides, as the test of screen or the management of bad piece of flash.
So the BootLoader ten minutes of a function practicality of design is important, can not only load the basic function that starts linux kernel satisfying, and can satisfy the needs of plant produced, also can help in the mobile phone development process, to pinpoint the problems.
Summary of the invention
The objective of the invention is to overcome the defective of above-mentioned prior art, the method for designing of BootLoader in a kind of Linux smart mobile phone is provided, not only can realize mobile phone power on the back initialization apparatus, the loading of finishing linux kernel then starts, and can make things convenient for system interconnect with Windows, realize the simply quick-downloading of systems soft ware by the USB2.0 agreement, support a plurality of USB to download to carry out simultaneously with each USB passage in batch and download automatically, be fit to the needs of large-scale production, can also help the developer to carry out some bottom debug of hardware and software easily in addition.
Further say, the construction method of a kind of handset starting guiding provided by the invention is the method for designing of BootLoader in a kind of Linux smart mobile phone, when BootLoader debugs and download, the Linux smart mobile phone links to each other by the USB line with the Windows function software, follow the USB2.0 agreement, strengthen the interoperability of Linux and Windows system, improve software download speed, increase the hardware testing function of BootLoader.
For achieving the above object, the construction method technical scheme of a kind of handset starting guiding provided by the invention is that the Linux smart mobile phone links to each other by the USB line with the Windows function software, earlier by instrument JTAG or Jflash the 0th subregion with BootLoader programming flash in the mobile phone, enter two stages that Bootloader starts then, phase I Stage1 uses assembler language, as assembler language Start.S, compiling back capacity is less than 4K.Can be behind the handset starting by the Samsung chip, " Steppingstone " technology as S3C2442 starts Start.S, finish the initialization of CPU and internal memory, for the code that loads second stage is prepared the space, and the second stage code is copied among the SDRAM of appointment, and jump to second stage code entry address.Second stage stage2 then uses the C language, at first carry out the boot_first function among the boot_start.c, these some row hardware devices of function meeting initialization, as CPU, Board, the initialization of interruption and RAM, also can carry out NAND, the initialization of I2C bus and power management chip, the judgement start is former because USB charging start or button normal boot-strap, this is the result who is obtained by I2C bus access power management chip, if for USB charging start then put a flag bit, the minimum 2s of being of stand-by period is set, generally can be designed as 2-10s, being initialized as USB Device equipment and opening USBD interrupt latency data, is 0s otherwise install the stand-by period.At this moment enter the main_loop function, judge whether the stand-by period is 0, if be 0 then finish the loading and the redirect of kernel from the address of appointment; If be not 0 to be USB charging start, then can handshake data that wait for Windows end USB in the time be set.
Enter hardware testing pattern or data downloading mode if desired, operation Windows ending tool, being polled to mobile phone end USB Device is ready to, then send handshake by USB, when receiving correct handshake in 2s, BootLoader then stops the redirect linux kernel, abandon normal startup, light keyboard light, enter test and downloading mode.At this moment the user just can control mobile phone fully by the instrument of Windows end, select as the cell phone software of selecting by dialog box to need to download, perhaps the test such as the keyboard light of carrying out hardware by click option tested, and lights screen, the bad block management of test such as a displayed map piece of writing and flash etc.
Compared with prior art, the beneficial effect of the construction method of a kind of handset starting guiding provided by the invention is: realized BootLoader initiating hardware in the Linux smart mobile phone, load linux kernel and redirect and carry out basic functions such as kernel, added new element again.When debugging and downloading by BootLoader, mobile phone only needs to be connected just by the USB line with the Windows end, follows the USB2.0 agreement, strengthened interoperability with Windows, simplified the difficulty of using, improved speed of download, made large-scale production Linux mobile phone become possibility; In addition, can also help the developer to carry out the test of bottom hardware, increase the function of BootLoader, accelerate the speed of exploitation.
Below, describe the details and the working condition of the method that proposes according to the present invention in conjunction with the accompanying drawings and embodiments in detail.
Description of drawings
Fig. 1 is the startup flow chart of Start.S in phase I of BootLoader of the present invention;
Fig. 2 is the startup flow chart of Boot_first () in the second stage of BootLoader of the present invention;
Fig. 3 judges whether to charge the flow chart of start among the BootLoader of the present invention;
Fig. 4 is that USBD device passes through to interrupt receiving data stream journey figure among the BootLoader of the present invention;
Fig. 5 is the software interface figure of Windows end of the present invention test and download tool.
Embodiment
Below, the present invention will be further described in conjunction with the accompanying drawings and embodiments, but should not limit protection scope of the present invention with this.
The method for designing of BootLoader in a kind of Linux smart mobile phone that the construction method preferred embodiment of a kind of handset starting guiding provided by the invention provides, the Linux smart mobile phone links to each other by the USB line with the Windows function software, and this method comprises the following steps:
Step (1): enter the Stage1 that Bootloader starts; Behind the mobile phone power-on, at first can be placed on preceding 4KB program among the nand flash by Samsung chip such as S3C2442 " Steppingstone " technical operation, promptly be placed on 0block BootLoader Start.S or directly in NOR flash, move BootLoader, tell about here from nand flash and start BootLoader.The code of Stage1 is relevant with the architecture of CPU, with the compilation language compilation.Start flow process as shown in Figure 1:
Carry out BootLoader stage1 Stage code after the system reset, at first finish exception vector is set, then shield interruption, system clock is set, allocate memory district control register, then for stage2 Stage code storage allocation space and the code that copies the stage2 stage to this memory field, jump to the code porch of stage2 after finishing.
Step (2): enter the stage2 that Bootloader starts; At first carry out boot_first () function, start flow process as shown in Figure 2.At first finish the initialization of some capital equipments, comprise the initialization of CPU, the initialization of terminal, the initialization of RAM etc.; Then carry out the initialization of flash, the initialization of internal memory operation function; Carry out the initialization of system parameters then; Mainly be to obtain necessary environmental variance according to configuration file, as internal memory, flash size, some necessary parameters when starting kernel; The initialization of peripheral components comprises the initialization of I2C bus, the initialization of power management chip, and these mainly are that whether USB charging start detects and light the preparation of cell phone keyboard lamp for following; And the initialization of LCD.
Step (3): after the initialization of finishing equipment, whether be that the condition that the USB charging is started shooting is judged, be provided with to start the stand-by period that its flow process as shown in Figure 3 according to obtaining from power management chip.
At first by I2C bus access power management chip, obtain whether to be in this moment USB charging open state, if set boot_charge then, and the initialization mobile phone is a USB device equipment, allow USBD to interrupt, the minimum 2s of being of startup stand-by period is set, otherwise is set to 0s; Enter main_loop (), judge whether the stand-by period is 0,, then copy linux kernel and carry out linux kernel, otherwise detect the flag bit of whether shaking hands to assigned address and redirect if be 0.
The flag bit of shaking hands is provided with in USBD interrupts, the USB device that finishes to the initialization of mobile phone end when Windows end software detection, just send handshake by USB port, having detected handshake in the BootLoader interrupt routine comes, just putting the flag bit of shaking hands is 1, in main_loop, detect this flag bit and correctly shake hands and just abandon the startup of kernel, enter downloading mode.
Step (4): enter after the success of shaking hands and download or test pattern;
The reception flow process of data as shown in Figure 4 in USB device interrupts.
IRQ USBD interrupts arriving, and enters the Interrupt Process function, at first judges the concrete triggering reason that USB device interrupts, interrupt as USB device RESET, RESUM or SUSPND, or output port or input port interruption.If interrupt for output, at first judge whether to have finished and shake hands, if not then receive data, and the set flag bit of shaking hands.Because main_loop () can wait for 2s in while circulation, whether so can detect time flag bit, it is correct to detect handshake then, if correctly then stop to start, enters downloading mode, receives order.
Mentioned order is divided into two classes, and a class is the operating data order, need enter data-transmission mode; One class is test, debugging or querying command.Data at first are packaged into certain form by the Windows ending tool and send according to usb protocol, and the form of each bag is: the mobile phone end need be the memory address of deposit data (4byte)+length of data package (4byte)+data+checksum (4byte); If debugging or querying command then do not need to enter downloading mode, direct fill order in main_loop ().The order of supporting comprises the flash bad block management, and LCD lights test, keyboard light control, sound test etc.
Step (5): fill order, operating data is as programming flash;
After data send, in main_loop (), can resolve these data, necessary parameter when obtaining fill order, as the block of programming, the length of data, the memory address of deposit data etc. and according to before order, and finally finish the programming of data.
Receiving data or order in the BootLoader method of the present invention all is to finish in USB interrupts, in main_loop (), handle then, how to handle by the data of accepting in main_loop () the decision interruption, the process of transmitting of data all is big binary file to be divided into parcel send, be not subjected to the restriction of memory size, and the meaning of data, be that kernel or rootfs are decided by the Windows ending tool as it, improved the compatibility of BootLoader; Each packet and order all are process checksum verifications, have automatic retransmission mechanism.
BootLoader method of the present invention needs the cooperation of windows function software instrument.This instrument is realized with the MFC storehouse under Windows operating system, adopts the USB that increases income to drive, its user interface as shown in Figure 5, its workflow is corresponding with mobile phone end USBD flow process, two ends cooperate transmission and the download programming of finishing data.Instrument supports single file to download and the batch processing download, and supports some explosion commands, and the Log window can clearly show the process of each step action in addition.
The Windows ending tool starts before will powering on prior to mobile phone, the continuous USB device that is initialized to of poll mobile phone in a thread then, if detect, just send handshake, the stop startup of BootLoade, then according to user's selection, packing data, and be transferred to BootLoader.The function of supporting has download bootLoader, kernel, rootfs and upper strata GUI; Wipe the NAND piece; The testing hardware function comprises: screen test, keyboard light test, flash bad block management etc.; Support more generic command management, as obtaining BootLoader version information, environmental variance information etc.
The construction method of a kind of handset starting guiding provided by the invention has not only been realized the BootLoder in the Linux smart mobile phone, realize the copy linux kernel and started the function of kernel, and realized function by Windows tool renewal Linux cell phone software, overcome linux system unfriendly with defectives such as windows is incompatible; Data are through the USB2.0 protocol transmission, and the Windows instrument is supported 8 USB passages, has improved speed of download; Each packet all passes through the Checksum verification, has misdata bag retransmission mechanism, has heightened system's error correcting capability; Have the hardware testing function, increased the development rate of project.
Claims (7)
1, a kind of construction method of handset starting guiding, it is characterized in that this method is the method for designing of BootLoader in a kind of Linux smart mobile phone, when BootLoader debugs and download, the Linux smart mobile phone links to each other by the USB line with the Windows function software, follow the USB2.0 agreement, strengthen the interoperability of Linux and Windows system, improve software download speed, increase the hardware testing function of BootLoader.
2, the construction method of a kind of handset starting guiding according to claim 1 is characterized in that this method comprises the following steps:
Step (1): enter the Stage1 that Bootloader starts; Behind the mobile phone power-on, at first operation is placed on the preceding 4KB program among the nand flash, promptly is placed on the Start.S of the BootLoader of 0block; Carry out BootLoader stage1 Stage code after the system reset, at first finish exception vector is set, then shield interruption, system clock is set, allocate memory district control register, then for stage2 Stage code storage allocation space and the code that copies the stage2 stage to this memory field, jump to the code porch of stage2 after finishing;
Step (2): enter the stage2 that Bootloader starts; At first carry out boot_first () function, finish the initialization of some capital equipments, comprise the initialization of CPU, the initialization of terminal, the initialization of RAM etc.; Then carry out the initialization of flash, the initialization of internal memory operation function; Carry out the initialization of system parameters then; Mainly be to obtain necessary environmental variance according to configuration file, as internal memory, flash size, some necessary parameters when starting kernel; The initialization of peripheral components comprises the initialization of I2C bus, the initialization of power management chip, and these mainly are that whether USB charging start detects and light the preparation of cell phone keyboard lamp for following; And the initialization of LCD;
Step (3): after the initialization of finishing equipment, whether be that the condition that the USB charging is started shooting is judged, be provided with to start the stand-by period according to obtaining from power management chip; At first by I2C bus access power management chip, obtain whether to be in this moment USB charging open state, if set boot_charge then, and the initialization mobile phone is a USB device equipment, allow USBD to interrupt, the minimum 2s of being of startup stand-by period is set, otherwise is set to 0s; Enter main_loop (), judge whether the stand-by period is 0,, then copy linux kernel and carry out linux kernel, otherwise detect the flag bit of whether shaking hands to assigned address and redirect if be 0;
Step (4): enter after the success of shaking hands and download or test pattern; IRQ USBD interrupts arriving, and enters the Interrupt Process function, at first judges the concrete triggering reason that USB device interrupts, interrupt as USB device RESET, RESUM or SUSPND, or output port or input port interruption; If interrupt for output, at first judge whether to have finished and shake hands, if not then receive data, and the set flag bit of shaking hands; Because main_loop () can wait for 2s in while circulation, whether so can detect time flag bit, it is correct to detect handshake then, if correctly then stop to start, enters downloading mode, receives order;
Step (5): fill order, operating data; After data send, in main_loop (), can resolve these data, necessary parameter when obtaining fill order, as the block of programming, the length of data, the memory address of deposit data etc. and according to before order, and finally finish the programming of data.
3, the construction method of a kind of handset starting guiding according to claim 2, it is characterized in that the described flag bit of shaking hands is provided with in USBD interrupts, the USB device that finishes to the initialization of mobile phone end when Windows end software detection, just send handshake by USB port, having detected handshake in the BootLoader interrupt routine comes, just putting the flag bit of shaking hands is 1, in main_loop, detect this flag bit and correctly shake hands and just abandon the startup of kernel, enter downloading mode.
4, the construction method of a kind of handset starting guiding according to claim 2 is characterized in that described taking orders is divided into two classes, and a class is the operating data order, need enter data-transmission mode; One class is test, debugging or querying command; Data at first are packaged into certain form by the Windows ending tool and send according to usb protocol, and the form of each bag is: the mobile phone end need be the memory address of deposit data (4byte)+length of data package (4byte)+data+checksum (4byte); If debugging or querying command then do not need to enter downloading mode, direct fill order in main_loop (); The order of supporting comprises the flash bad block management, and LCD lights test, keyboard light control, sound test etc.
5, the construction method of a kind of handset starting guiding according to claim 2, it is characterized in that receiving in the BootLoader method data or order all is to finish in the USB interruption, in main_loop (), handle then, how to handle by the data of accepting in main_loop () the decision interruption, the process of transmitting of data all is big binary file to be divided into parcel send, be not subjected to the restriction of memory size, and the meaning of data, as it is that kernel or rootfs are decided by the Windows ending tool, has improved the compatibility of BootLoader; Each packet and order all are process checksum verifications, have automatic retransmission mechanism.
6, the construction method of a kind of handset starting guiding according to claim 2, it is characterized in that the BootLoader method matches with Windows function software instrument, this instrument is realized with the MFC storehouse under Windows operating system, the employing USB that increases income drives, its workflow is corresponding with mobile phone end USBD flow process, and two ends cooperate the transmission of finishing data and download programming; Instrument supports single file to download and the batch processing download, and supports some explosion commands, and the Log window can clearly show the process of each step action in addition.
7, the construction method of a kind of handset starting guiding according to claim 2, it is characterized in that the Windows ending tool starts before will powering on prior to mobile phone, the continuous USB device that is initialized to of poll mobile phone in a thread then, if detect, just send handshake, the startup of the BootLoade that stops is then according to user's selection, packing data, and be transferred to BootLoader; The function of supporting has download bootLoader, kernel, rootfs and upper strata GUI; Wipe the NAND piece; The testing hardware function comprises: screen test, keyboard light test, flash bad block management etc.; Support more generic command management, as obtaining BootLoader version information, environmental variance information etc.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102541572A (en) * | 2010-12-08 | 2012-07-04 | 中兴通讯股份有限公司 | Method, system and device for realizing guide of operating system kernel |
| CN102681858A (en) * | 2011-03-09 | 2012-09-19 | 研祥智能科技股份有限公司 | VxWorks operation system as well as method and device for configuring start waiting time thereof |
| CN101763279B (en) * | 2010-01-15 | 2012-12-12 | 上海维宏电子科技股份有限公司 | BootLoader architectural design method |
| CN104391769A (en) * | 2014-10-20 | 2015-03-04 | 卓易畅想（北京）科技有限公司 | Method and device for guiding user to activate USB (Universal Serial Bus) debugging option |
| CN104572162A (en) * | 2014-03-21 | 2015-04-29 | 中电科技（北京）有限公司 | UEFI (Unified Extensible Firmware Interface) firmware implementation method based on Loongson handheld computer |
| CN105867898A (en) * | 2015-12-08 | 2016-08-17 | 乐视移动智能信息技术（北京）有限公司 | Method and mobile terminal for realizing wireless charging |
| CN107544804A (en) * | 2017-09-01 | 2018-01-05 | 北京雷石天地电子技术有限公司 | The startup method and device of embedded system terminal development mode |
| CN109168088A (en) * | 2018-09-14 | 2019-01-08 | 青岛海信传媒网络技术有限公司 | A kind of the starting method, apparatus and smart television of intelligent television system |
| CN110471706A (en) * | 2014-06-10 | 2019-11-19 | 富士施乐株式会社 | Electronic equipment and information processing method |
| CN112181506A (en) * | 2020-09-29 | 2021-01-05 | 美唐科技(江苏)有限公司 | Software downloading system based on dual 1860 system terminals and downloading method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101763279B (en) * | 2010-01-15 | 2012-12-12 | 上海维宏电子科技股份有限公司 | BootLoader architectural design method |
| CN102541572B (en) * | 2010-12-08 | 2015-09-16 | 中兴通讯股份有限公司 | A kind of method, system and device realizing operating system nucleus and guide |
| CN102541572A (en) * | 2010-12-08 | 2012-07-04 | 中兴通讯股份有限公司 | Method, system and device for realizing guide of operating system kernel |
| CN102681858A (en) * | 2011-03-09 | 2012-09-19 | 研祥智能科技股份有限公司 | VxWorks operation system as well as method and device for configuring start waiting time thereof |
| CN102681858B (en) * | 2011-03-09 | 2017-07-11 | 研祥智能科技股份有限公司 | Vxworks operating system and the method and apparatus for configuring its startup stand-by period |
| CN104572162A (en) * | 2014-03-21 | 2015-04-29 | 中电科技（北京）有限公司 | UEFI (Unified Extensible Firmware Interface) firmware implementation method based on Loongson handheld computer |
| CN110471706A (en) * | 2014-06-10 | 2019-11-19 | 富士施乐株式会社 | Electronic equipment and information processing method |
| CN110471706B (en) * | 2014-06-10 | 2023-03-24 | 富士胶片商业创新有限公司 | Electronic device and information processing method |
| CN104391769A (en) * | 2014-10-20 | 2015-03-04 | 卓易畅想（北京）科技有限公司 | Method and device for guiding user to activate USB (Universal Serial Bus) debugging option |
| CN105867898A (en) * | 2015-12-08 | 2016-08-17 | 乐视移动智能信息技术（北京）有限公司 | Method and mobile terminal for realizing wireless charging |
| CN107544804A (en) * | 2017-09-01 | 2018-01-05 | 北京雷石天地电子技术有限公司 | The startup method and device of embedded system terminal development mode |
| CN109168088A (en) * | 2018-09-14 | 2019-01-08 | 青岛海信传媒网络技术有限公司 | A kind of the starting method, apparatus and smart television of intelligent television system |
| CN112181506A (en) * | 2020-09-29 | 2021-01-05 | 美唐科技(江苏)有限公司 | Software downloading system based on dual 1860 system terminals and downloading method thereof |
| CN112181506B (en) * | 2020-09-29 | 2024-04-19 | 美唐科技(江苏)有限公司 | Software downloading system based on double 1860 system terminals and downloading method thereof |
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Open date: 20080917 |