TWI275999B - Method for updating software of an embedded device - Google Patents

Abstract

A method for updating software of an embedded device is disclosed, which executes an updated program in an operating system, so as to update data in a flash read-only memory. The method firstly downloads a flash image and stores it into a program memory of a random access memory, and copies the updated program to a reserved memory of the random access memory. Then, the method disables an interrupt of the operating system, and extracts a physical memory address of the flash image. Next, the method sets the flash read-only memory to be at a write mode, and starts to update the flash read-only memory. After the update, the method sets the flash read-only memory to be at a read mode, and determines whether the flash read-only memory has been updated. If so, the method re-activates the embedded device; otherwise, the method enables the interrupt of the operating system, so as to recover a normal status of the operating system.

Description

1275999

The present invention relates to a method for updating a software of an embedded device, and more particularly to a flash read-only memory (f 1 ash ROM) of an updateable embedded device. Work system area or non-operation system area data method. [Background of the Invention] The current trend of thinness and shortness is not only the direction of hardware design, but also the operating systems and applications. A small system with special functions can be embedded in the machine or in the device to achieve a specific function. This is called an embedded system or an embedded device. In daily life, it is also quite common for embedded devices such as personal digital assistants (pers〇nal digital asslst), telephone systems, photocopiers, elevators, mobile phones, etc. = ☆ digital assistants and t 'currently embedded The operation of the device is performed in the flash read-only memory (flash tray (four), flash ROM). And because of the software upgrade and more (2): = fast, how to update the special program provided by the soft power of the lost farmer. It will be embedded; the implementation will be blocked by the implementation, and the PC will be executed relatively. ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ So, the intrusive shock starts to download the image loading

TW0675 (061110) CRF.ptc imag〇. Lan technology is stored randomly (remember; h body 1275999 amendment i number 91110894 five, invention description (2)

After the random access memory (RAM), start again: i also downloads the updated image, and at the same time starts to update the software 'moving the element, restarting the embedded device to complete the update or upgrade, but the above method has The following shortcomings: · 7 for ° (Ϊ) have to use the cable to connect with the personal computer to upgrade the function, so it is not convenient for the user. ‘It’s going to be re-booted’ and even has to be restarted twice to get the software updated, so the process is quite cumbersome for the user. (3) Because the update function requires the use of the operating system's ^Xinxin, (kernel) service to upgrade other areas of the flash read-only memory, the above method cannot update all the flash-only read-only memory. (4) There is no automatic update function, you have to manually start the user, connect the PC and execute the update program. ^ 5 ) — While downloading the update program, the update operation can be performed at the same time, saving time and memory space. 'But if a disconnection occurs, it cannot be followed by the second/update, because the system has been changed but not completely, it will cause 严重Cannot open. SUMMARY OF THE INVENTION In view of the above, the object of the present invention is to provide a method for updating a software embedded in an embedded device, which can be used to download an updated image in an evening manner, without being connected. Line and computer you =1 In addition, the present invention also provides automatic download and update functions, without the need for manual operation by the user, which is quite convenient. According to the purpose of the present invention, a software for updating an embedded device is proposed

TW0675 (06lll〇) CRF.ntc 1275999 ----m 9111089j_年月 B Chromium not _ five, the method of invention (3). This method is implemented in the operating system of the embedded device by an update program to update the operating system or an application. The embedded device has a memory access; a random access memory (RAM) and a flash read-only memory (flash ROM), which is used for flash-reading memory. Store the operating system and the application. The method of the present invention first downloads an updated image (f lash image) and stores it in the program memory (pr〇gram mem〇ry) of the RAM. The copy of the critical core code of the update program

Go to the reserved memory of the RAM and execute the key core code. Immediately, the interrupt of the (d i sab丨e ) operating system is turned off, and the physical memory I (Physical Memory) address of the updated image is retrieved. Receiver, set the flash read-only memory, write mode, and update the flash-only memory based on the updated image. After updating, set the flash read-only memory to read mode. It is then determined whether the operating system has been updated, and if so, the floating device is restarted. If only the application is updated, the interrupt of the operating system is enabled to restore the normal state of the operating system. The above described objects, features, and advantages of the present invention will become more apparent from the following detailed description. Embedded device

TW0675(061110)CRF.ptc Page 7 1275999 Amendment No. 91110S (U V. Invention Description (4) Use f-type (application). The operating system or the flash-only read-only memory of the lost device (fUsh read_22 Store memory, flash ROM), and the present invention ^Guhua melon #主y enters the special & type heart-shaped device t system (SerV1Ce) to download updated images (fUsh image) or upgraded. Some services, such as network functions or file management functions, etc., in addition, when updating flash-only read-only memory, the technology of the present invention disables the operating system to avoid interruption during the update, ( Interrupt interference, which is an unpredictable error during the update. Also due to the shutdown of the operating system, the original memory corresponding/mapping table cannot be used. Therefore, the present invention constructs a record correspondence table by using a fixed address conversion table in a reserved memory in a random access memory (RAM) to perform an update operation. Next, the spirit of the present invention will be described in detail. Referring to Figure 1, a schematic diagram of the connection between the embedded device and the host is shown. In the first picture, 'the funeral device! The Q1 system can be connected to the host 1〇3 or 1〇5 via a wireless local area network (wireless LAN area netw〇rk, wireless LAN) 1〇7 or a connection line l〇9 for downloading at the host. Update image on 103 or 105 (not shown). The connection line is like a universal router (universai sei^ai bus, USB) or a serial (seriai) cable. The desired device 1 0 1 has a random access memory and a flash-only memory (both not shown). Flash-reading memory is used to store the operating system and applications of the rear-access device 10. RAM has storage memory

TW0675(061110)CRF.ptc Page 8 1275999 Revised 曰MM 9111QR94 V. Invention description (5) and „rage memory”, program memory (pr〇gram is 〇 mouth, side memory. Storage memory is the same virtual RAM disk, I is used to store the shells, while the funeral device i 〇i continues to provide power to the memory, the data stored in the memory will not disappear. Program memory ^ 2 people The RAM in the computer is used to store the running application. In addition, the size of the private memory and the storage memory can be dynamically adjusted according to the actual =, but the capacity of the RAM is fixed, so the capacity of both The : and the unchanged. The address conversion table of the reserved memory is fixed, so that when the v ^ Ϊ disables the operating system, the address conversion table can be used to perform the update operation. The method for updating the software of the embedded device is executed in an operating system of the embedded device 101 in an updated manner for updating the soil application. Please refer to FIG. 2, which is shown as a preferred κ according to the present invention. Example of updating an embedded device The method flow diagram of the body is to download the update image (flash image) to the program memory of the embedded = RAM, and then continue to update the software, the invention is not limited thereto. First, in Figure 2 Steps 201 to 205 add the capacity of the program memory (VO 1 ume ) to store the updated image. ', ', 9, and in step 2〇1, increase the capacity of the program memory of the RAM. The capacity space of the storage memory is the same and the length of each other is different, so this step can also be achieved by reducing the capacity of the storage memory: the operating end depends on the characteristics of the actual operating system. Then, Yufu' The self-programmed memory (aUocate) has a capacity of three pre-seconds, one value of the memory space, and the predetermined copy value is 256K.

TW0675 (061110) CRF.ptc Page 9 in Qiao 5, in steps 201 to 20 3, so that the assigned "/ in mm.................... ....... § Reminiscence 1275999 Correction No. 1 9]nnsQi V. Invention Description (6) Two rooms can be used to store updated images. In step m, 'downloading the updated image to the program memory. The updated image system can be a compressed file. Thus, the download method of this step can be determined by the visual input device 1〇1 and the main cutting mode. For example, the '1' system can be connected to the host 103 via a connection of the main road 103, or connected to the connection line I, and the updated image can be downloaded from the host 103 or 105. The download library 1 can be directly stored in the program memory, or it can be saved to the middle and then the image will be reproduced in the copy. In addition, the memory card 111 can also be stored as a medium, and the host 103 or 105 directly stores the updated image on the storage memory card ι; ιι, and then the embedded device 10 丨 reads the memory card 更 , It can be connected to the host 103 or 105, and can also be updated. The use of & memory card 111 can update multiple embedded devices without the need to hang the connection download. Then, in step 209, copy the key code of the update program (cnt1Cal core code) to the reserved memory of the RAM, and the key core code. The so-called key core code is the code that executes the next step ^. Since the system of the flash-reading memory is updated, the system is disabled; once the operating system is closed, the function of the stamp and the text provided by the chapter and the system is also used by the helmet... Therefore, in this step, the update program is copied to the fixed address conversion table in the reserved memory in the reserved memory to continue to perform access to update the image. Next, step 211 is performed to update the private mode and in step 211, the interrupt of the operating system is interrupted. _ I face _ TW0675 (061110) CRF.ptc Page 10 1275999

(interrupt). The purpose of this step is to turn off the above, the content of the flash read-only memory will be more professional. The kind of shutdown will cause the flash-only read-only memory to be saved to avoid the impact of the next Update step: For example,: Interruption of the closed operating system to avoid, page faults occur. (Page" exception occurs. Because the operating system is processing, the page is missing." Perform "context switching" (C〇ntext switching) , which will access the contents of the flash-only read-only memory, so it should avoid the "missing of the page miss, the occurrence of the closure and the interruption of the search system related to the page miss."

Then, in step 2 1 3, the physical memory address of the updated image is retrieved. Since the memory capacity of the embedded device 1.1 is limited, the operating system uses virtual memory to increase the memory capacity usability. This step obtains the physical memory address of the updated image according to the characteristics of each operating system, according to the correspondence between the virtual memory and the physical memory (m a p p i n g ). Step 215 is then performed. In step 2:15, the flash read-only memory is set to the write mode to prepare to update the data in the flash read-only memory. Then, in step 2 17 , the data in the flash read-only memory is updated according to the updated image. This step is implemented by using a fixed address of the reserved memory to convert the table to a fixed address translation table with a conversion start address as the base. Please refer to Figure 3 for the detailed steps of this step. First, in step 301, the physical memory address of the program memory is converted into a fixed address conversion table. This step 3 0 1 is to construct the conversion of virtual memory and physical memory.

TW0675(061110)CRF.ptc Page 11 1275999 Case No. 91110894 Λ:_Ά 修正 Amendment V. Description of invention (8). Then proceed to step 3 0 3. In step 30 3, the data block of the updated image is decompressed. Then, in step 3〇5, the converted start address is used as the base address, and the decompressed data block content is accessed to update the data of the flash read-only memory. Next, in step 307, the above steps 3〇1 to 3〇3 are repeated to complete the update of the flash-only read memory. After the update data is completed, proceed to step 2 1 9. Set the flash read-only memory to read-only mode (read m〇de). And in step 221, it is determined whether the job system is updated. If the operating system has an update, the embedded device must be rebooted. If only the application is updated, the embedded device ιοί毋 must be rebooted, but the interrupt of the operating system must be enabled to enter the normal state of the operating system master. In this way, the operating system or application that updates the flash read-only memory can be completed. The above description is based on downloading a new image into the program memory. However, the technique of the present invention can also download the updated image to the storage record and move the updated image to the program memory, and the method of g: biting the software is another. A flow chart. Firstly, the capacity of the memory is stored to accommodate the update of the image, and is added to the step _3 to download the updater; ^ step 4〇3° ::* the immersive device 101 can be wirelessly : Widely connect the cable 1〇9 or store the memory card U1 autonomous-, the cable connection 1〇7, like 'and store it in the storage memory. Download update shadow in 3

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TW0675(061110)CRF.ptc 1275999

Corrected to ^ § Recall, followed by step 2 0 9. For the details of this step 40 5, please refer to Figure 5. In step 5〇1 of Figure 5, increase the capacity of the program. Then, in step 5〇3, jal l〇cate is allocated from the program memory, and the capacity is one of the predetermined copy values. The pre-replication value is, for example, 256K bytes. Then proceed to step 5 0 5. In step 505, from the storage memory, a portion of the updated image capturing the predetermined copy value is copied into the above-mentioned memory space. Then in the step, the updated image in the memory of the seven memory is reduced (truncate)

^Copy value' and repeat steps 5〇1 to 5 above until the updated image is all copied to the program memory. The methods from steps 501 to 50 7 are implemented because the memory capacity is limited, and the image is moved to the program memory in batches. If the RAM is sufficient, it can be used according to the actual situation. In addition, the present invention can be updated by the host 103 via the wireless local area network 105: the update command to the embedded radiance. The private AA 在8 is set to 〇1' to trigger the update of the present invention to automatically update. Action ^ ^ ^ ^ ^ ^ u Initial work can be done manually without the user, § Host 1 0 3 has a new version of the new $ # new program. The present invention is a method for updating the soft body of the intrusion device, which has the following advantages: (1) ) It is not necessary to go through the far-fetched 衧 靳 , , 太 太 太 太 太 太 RR RR RR RR RR RR RR RR RR RR RR RR RR RR RR RR RR RR RR RR RR RR RR RR

Page 13 TW0675 (061110) CRF.ptc 1275999 Case No. 9111〇894·_ Description of invention (10) _

Ξ Storing the memory card 111 to download the updated image, increasing the convenience of the user (2) When the user is manually updating the new non-operating system part, it is not necessary to restart 1 to make it easy~ and if only (3) The invention can be updated: the host m. area. All areas in the body (4) use the wireless area network 1 发出 to issue an update command to the embedded host 丨 , , , , and the host 103 can actively invent the method. Thus, the present invention can trigger the update program to perform the manual operation without using the &#4 software without the user (1) the present invention will update the image all under; there is no mountain upgrade version. After the update, there is no need to worry about the loss caused by the disconnection, and set the time. The updated image is loaded to save downloads. (7) The present invention can access the store line update action. Therefore, it only needs to be stored by the host to save the image to update the image, so that the memory card can be stored quickly; convenience, and the time for downloading multiple connections can be saved. Therefore, it is not intended to limit the present invention. ^^ The best example is disclosed above.

Within the spirit and scope of the present invention, the apricot skilled person will be regarded as a rear-end decoration without departing from the scope of protection of the present invention. J < A Ming Ming Lei Target is defined by

1275999 BRIEF DESCRIPTION OF THE DRAWINGS [Brief Description of the Drawings] The drawing shows a connection diagram of an embedded machine in accordance with the present invention. Eight Packs Figure 2 shows the flow chart of the body according to the method of the present invention. Season x is good "" column update embedded. Figure 3 is shown in Figure 2, Figure 4 is shown in accordance with the method of step 217, the add-on device, the software method of the other one of the current flow - FIG. 5 is a diagram showing the flow of the method in the fourth step: FIG. 4: FIG. Regional Network 1 〇9: Cable 111: Memory Card TW0675 (061110) CRF.ptc Page 15

Claims (1)

1275999 The patent application scope _ body Fang Feng species ^ update the embedded device soft = method is implemented by an update program on the embedded device, the embedded device has a system or an application ' Eight-way access to 5 memory (random access _ machi, AM) and - flash read-only memory (1) heart system ^ R0M) 'The flash read-only memory is used to store the operating system and the application Program, the method includes: Ρ + 5 new image Ο 18311 image) and stored in a private body (pr〇gram mem〇ry) of the RAM; ^ complex? Update one of the key core code (c(1) code, ^ sub-execute the key core code; 豆中11 1SSable) The interrupt of the operating system, ^ . , , 糸 之 interrupt system can cause the fast The flash read-only memory is stored in the physical memory address of the updated image, and the flash-only read memory is the write mode; Γ update the image update to the flash read-only memory Body; 丨 丨 社 社 社 社 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 (enable) Interruption of the operating system. 2. The method of claim 1, wherein the embedded method 1275999 The method of downloading a host' and downloading-updating the image is connected to the host from the host via the wireless local area network. ^ ^Update the image to the private number 91110894. 6. The device for patent application is connected to a host via the wireless network (wireless UN) 3, as claimed in the patent application scope. The step of updating the image is as follows: the mouth of the host downloads the updated image to the RAM (storage memory); and the memory of the hidden entity: $update 'v The method of moving from the storage memory to the program memory, the method of claim 3, wherein the method of downloading from the host to update the image to the RAM stores the memory further comprises: adding the storage The capacity of the memory. The method of claim 3, wherein the step of moving the updated image from the storage memory to the program memory is: increasing, the capacity of the program memory; In the memory, the allocated capacity is a memory space of a predetermined copy value; and the portion of the predetermined copy value is extracted from the memory of the memory, and the new image is copied into the memory space; The updated image in the storage memory is truncate the predetermined copy value, and the dream is repeated until the updated image is completely copied to the program memory. 6 is 1275999 and the value is 256 Κ bytes (byte/. Device 7: The method described in claim 1 of the patent scope, wherein the mourning clothes are directly connected to a host and card), and 兮π Fan right „ pure 廿圯 ^ card (storage two-way downloading an update image is: = j host download the updated image to the storage memory card; and s § 1 „ memory card to copy the updated image The method of the first aspect of the patent, wherein the step of downloading and updating the shirt image is: downloading the updated image from a host to a storage memory card; The storage memory card is coupled to the embedded device; and the updated image is copied from the storage memory card to the program memory. - 如 如 请 请 请 请 请 请 请 请 请 请 请 专利 专利 专利Before the step of the shirt image, the method further comprises: increasing the capacity of the program memory (v〇lume); from the program memory, assigning (allocating) a box - a memory space of the copy value; S is - pre-repeated repeat The method of claim 1, wherein the system has a conversion start address as a base-fixed position. Address conversion table, and the step of updating the flash read only memory according to the updated image Convert the physical memory address of the program memory 1275999 1275999 Case No. 91110894 Month 修正 Amendment VI. Designated Representative Diagram I TW0675(061110)CRF.ptc Page 3