KR20060094807A - Binary file download method of wireless communication module for telematics - Google Patents

Abstract

 The present invention relates to a binary file download method of a wireless communication module for telematics, and in the related art, binary download for firmware upgrade is possible using only one fixed path among a plurality of communication paths existing in the wireless communication module. In consideration of mass production and development, only the wireless communication module that does not go through the control module that is responsible for the actual telematics user interface has to use communication paths. In consideration of such a problem, in the present invention, when a binary file is to be downloaded to a wireless communication module having a plurality of download paths, the wireless communication terminal firmware currently executed in the wireless communication module grasps a communication path from which a download instruction command is received. Writes information to a specific memory area and receives a RAM download handler according to the download instruction command, and then checks the active path information recorded in a specific area of the memory when the RAM download handler has control and continues a subsequent download. By allowing subsequent download paths to be recognized, all paths can be freely used to download a binary file to a wireless communication module, so that both developers and users can use a path that is easy to use.

Description

How to download binary file of wireless communication module for telematics {BINARY FILE DOWNLOAD METHOD OF WIRELESS COMMUNICATION MODULE FOR TELEMATICS}

1 is a simplified configuration diagram showing the configuration of a general telematics module.

Figure 2 is a flow chart showing the operation of the embodiment of the present invention.

*** Explanation of symbols for the main parts of the drawing ***

10: control module 20: wireless communication module

21: UART1 22: UART2

23: UART3

The present invention relates to a binary file download method of a wireless communication module for telematics, and more particularly, when downloading a binary file to a wireless communication module applied to a vehicle telematics module that performs various functions including wireless communication. It is an object of the present invention to provide a binary file download method of a wireless communication module for telematics so that a binary file can be downloaded smoothly even using an arbitrary path.

Recently, interest in telematics, a new technology based on automobiles, is rapidly spreading. The term telematics itself is a compound word of telecommunication and informatics that changes text and voice signals in computers, radio communications, satellite navigation, and the Internet. It means wireless data service that can exchange information by technology. In other words, it can be simply described as a wireless communication technology using a vehicle as a platform.

In other words, telematics is a technology that allows users to send and receive information using a vehicle based on wireless voice / data communication and satellite location information system (GPS), and uses the location information system and wireless communication network to provide traffic information, It is a rather broad conceptual technology that collectively refers to terminals and operating systems that can provide various mobile services, such as responding to emergencies, remote vehicle diagnosis, and Internet use (financial transactions, news, e-mail, etc.).

Therefore, among the various devices using the telematics technology, the recent research is to link the high-performance controller portion that controls the vehicle and provide a user interface and the wireless communication portion so that the driver and the passenger can see more information in the vehicle, It is a wireless communication part that analyzes various motion information of the vehicle itself and provides information to help driving.

Figure 1 shows a simple configuration of a general vehicle telemetrics module, such as checking the state of the vehicle or providing a GPS function, such as omit the basic control module 10 and the wireless communication module 20 and the wireless communication module Only the configuration of the communication paths 21, 22, 23 through which the 20 can communicate with the outside is illustrated.

In general, the control module 10 is a control part that collects various information to control overall telematics functions, provides a user interface, and receives and processes information about a vehicle from various connected sensing means. And a kind of computer including a memory. In addition, the wireless communication module 20 added to provide the wireless communication function to the high performance control module 10 is connected to the high performance control module 10 so as to transmit and receive voice or data wirelessly.

For example, a CDMA module or the like is used as the wireless communication module 20. In short, the wireless communication module 20 separates only a wireless communication part from a mobile communication terminal. Therefore, the wireless communication module 20 is internally provided with a controller (wireless communication modem) for driving itself, a ROM for storing its own firmware, a RAM for loading and executing executable files, and storing temporary data.

In addition, paths for downloading the firmware for operating the wireless communication module 20 to the wireless communication module 20 and maintaining communication with the outside are configured. In this case, a plurality of serial communication ports UART1 2, 3 (21, 22, 23) is arranged so that the designer can provide the firmware through one of the ports. Among them, the UART3 (23), which is a serial communication port, is connected to the outside via the control module 10, and can transmit and receive data with the control module 10, according to the input and driving conditions of the user interface. 10 may control the wireless communication module 20, and may provide the wireless communication module 20 with predetermined information provided through the interface.

In the related art, since the wireless communication module 20 provides only basic voice communication and data communication functions, the UART1 21 or the UART2 22 shown for downloading the fixed firmware to the wireless communication module 20 in the mass production stage are illustrated. ) And fixed one. For example, dedicated development equipment can be connected to UART1 (21), and a computer running file transfer can be connected to UART2 (22). Only the path is used as the default path.

In particular, since the wireless communication module 20 is designed to be able to upgrade firmware while its own operating program is running, to download a new firmware binary file to the operating wireless communication module 20, first, without the help of firmware on the RAM, A RAM download handler (binary state) capable of performing a download procedure is downloaded through a path (for example, UART1 (21)) set by the wireless communication module 20 as a default path and loaded into RAM. Then, in order to change the contents of the ROM, the execution of the currently executing firmware is terminated, and the RAM download handler loaded into the RAM has a control right and subsequently downloads a subsequent actual firmware binary file through the default path to the ROM. Thereafter, the wireless communication module 20 may be operated by using the newly downloaded firmware by resetting the wireless communication module 20 later.

That is, since the subject having the control right to execute the download is changed in the middle of the procedure for updating the currently operating firmware, it is not possible to know which path to continuously download after changing the control right among the plurality of paths shown. Therefore, until now, since firmware download was performed only when the wireless communication module 20 was developed or mass-produced, one of the UART1 21 and the UART2 22 directly managed by the wireless communication module 20 was determined as the default path. Only the path was used to upgrade the firmware.

However, the user's needs are gradually diversified, and the firmware upgrade of the wireless communication module 20 connected to the control module 10 that provides the user interface of the entire telematics module is required for continuous firmware upgrade even after the product is released. It is preferably carried out via the module 10, and in the case of the UART1 21, it was not possible to use it after the product was released. Therefore, when the control right is changed to download the firmware binary file, the wireless communication module 20 does not know which path to receive the subsequent data from. Therefore, the wireless communication module 20 uses the UART2 22 that can be used even after the product is released. There was no way to use a fixed path. As a result, since the firmware upgrade for the wireless communication module 20 is directly performed without going through the control module 10, the control module 10 cannot participate in the binary file download operation for the wireless communication module 20. There is a problem in that a limit occurs, and there is a problem that a user needs to manage the control module 10 and the wireless communication module 20 separately.

In consideration of such a problem, in the present invention, when a binary file is to be downloaded to a wireless communication module having a plurality of download paths, the wireless communication terminal firmware currently executed in the wireless communication module grasps a communication path from which a download instruction command is received. Writes information to a specific memory area and receives a RAM download handler according to the download instruction command, and then, if the RAM download handler has control and continues a subsequent download, the active path information recorded in the specific area of the memory is recorded. The purpose of the present invention is to provide a binary file download method of a wireless communication module for telematics that allows all paths to be used when a binary file is downloaded to the wireless communication module by checking a subsequent download path.

In order to achieve the above object, the present invention provides a binary file download method of a wireless communication module connected to a telematics control module and having a plurality of download paths. Receiving the RAM download handler file which is downloaded after the corresponding path information is recorded in a specific memory area and loaded into RAM; Moving a control entity of the wireless communication module to the RAM download handler loaded with RAM in the running firmware; The RAM download handler acquiring the control right may include verifying path information recorded in the specific memory area and performing a subsequent download process through the corresponding path.

The specific memory area in which the path information is stored is designated as a path information only area when all the firmware binary files stored in the RAM download handler and the ROM are generated, and the use of the area other than the path information is prohibited.

The download path may include at least one serial communication port for directly connecting a download device to a wireless communication module, and at least one serial communication connected with the control module to receive a download start command and download binary file data provided by the control module. It characterized in that it comprises a port.

When described in detail with reference to the embodiments of the present invention as described above.

FIG. 2 is a flowchart illustrating an operation of an embodiment of the present invention. As shown in FIG. 1, even when a user uses an arbitrary download path, the download subjects proceeding from the wireless communication module 20 recognize the same. It is to be done. That is, even though a plurality of download subjects are used for downloading, information on the download path is shared so that all serial communication paths provided in the actual wireless communication module 20 can be used for download.

The wireless communication module 20 itself has a plurality of serial communication ports, which are used for communication with the control module 10 and two serial ports 21 and 22 which can be directly connected to an external download interface. And one serial port 23 through which the binary file can be downloaded via the control module 10. In the prior art, since the UART2 (22) has been designated as a default path, which can be downloaded from the outside to a general computer even during mass production or after the product is released, a part of the telematics module is provided via the control module 10 which provides a convenient user interface. The firmware download of the wireless communication module 20 could not be performed. That is, it means that the user must use a separate path when upgrading the firmware of each of the control module 10 and the wireless communication module 20.

Therefore, in the present invention, a predetermined area of the RAM area of the wireless communication module 20 is allocated as an area for storing current path information. When the wireless communication module 20 receives a command for requesting the download, the firmware currently executed detects the path, stores the corresponding path information in a specific area of the allocated RAM, and then performs a predetermined download. The downloaded binary file is a RAM download handler, and the running firmware downloads it and loads it into RAM. Then, when control is transferred to the RAM download handler, the RAM download handler acquires current path information stored in a specific area of RAM and completes the download of the subsequent actual firmware binary file based on this.

In order to store the path information in this specific area, a RAM download handler necessary for downloading the firmware binary file of the wireless communication module 20 and a RAM area specific to the corresponding file when generating the firmware binary file to be updated are areas for recording path information. You must tell it in advance. As a result, a scatter loader file (scatter) defining a storage location for each block of loaded or downloaded files should be prevented from invading the corresponding RAM area even when the download is executed by the firmware or the RAM download handler is loaded into RAM. change the contents of the loader file) to secure the RAM area for storing the relevant route information. That is, the developer generates a RAM download handler and a firmware binary file that can compile a reference to the scatter loader file to secure a specific RAM area for storing a path. Of course, the RAM download handler and the firmware binary file should further include a portion for recording the recognized path information in a predetermined RAM area or reading the path information already recorded in the corresponding area and using the path information for downloading. . In addition, the firmware of the wireless communication module that is driven before the download should also be generated through the above process to perform the same function.

Next, a process of downloading the RAM download handler and the firmware binary file implemented as described above will be described with reference to the drawings.

First, the firmware running in the wireless communication module 20 receives a predetermined download command. Such a download command may be provided through any of a plurality of serial communication paths UART1 to 3 (21 to 23) provided, may be provided from the control module 10, or may be provided to other paths. It may be provided from equipment (a computer running a download application, dedicated development equipment, etc.).

Since the wireless communication module 20 that has received the above download command can know the information of the activated path, the wireless communication module 20 stores this information in a specific area of the preset RAM and downloads the RAM download handler (binary file type) to the RAM. Load. Naturally, the wireless communication module 20 that has received the download command should perform a task of emptying the RAM area so that all currently running tasks can be stopped and the RAM download handler can be loaded into RAM.

When a RAM download handler to perform a download progress subsequent to RAM is loaded, a jump is provided by providing a RAM download handler start position loaded in RAM to a program counter PC that designates a program execution position. Through this, the control right is transferred from the running firmware to the RAM download handler, and the firmware of the executed wireless communication module 20 is stopped.

The RAM download handler which starts the operation by acquiring the control right through the above process may search the specific location of the RAM to obtain the currently active path information, and set it as a path for downloading the subsequent firmware binary file. Subsequent download will proceed.

If all the download is in progress and the downloaded new firmware is stored instead of the existing firmware stored in the ROM, the wireless communication module 20 is reset so that the RAM download handler itself is erased and disappeared from the RAM and started by new nonvolatile firmware. .

As described above, the path currently being used among the plurality of paths can be maintained even when different executable files are executed by the control right when downloading the firmware binary file in which the control right occurs, so that the user can arbitrarily designate any path. It becomes possible. The design is UART1 (21), the mass production is UART2 (22), and after shipment, the user interface can be configured to enable firmware upgrade through UART3 (23) by unifying the control module (10). it means.

As described above, when the binary file download method of the wireless communication module for telematics of the present invention intends to download a binary file to the wireless communication module having a plurality of download paths, the wireless communication terminal firmware currently executed in the wireless communication module is instructed to download. Identify the communication path from which the command was obtained and record the information in a specific memory area and receive a RAM download handler according to the download instruction command, and thereafter, if the RAM download handler has control and continues the subsequent download of the memory, By checking the active path information recorded in a specific area so that subsequent download paths can be recognized, all paths are freely available for downloading binary files to the wireless communication module, making it easier for both developers and users to use. The effect of being able to use the route.

Claims (5)

In the binary file download method of a wireless communication module connected to the telematics control module and having a plurality of download paths, When the firmware executing in the wireless communication module receives a download start command through a predetermined path, recording corresponding path information in a specific memory area, receiving a downloaded RAM download handler file, and loading the downloaded RAM into a RAM; Moving a control entity of the wireless communication module to the RAM download handler loaded with RAM in the running firmware; The RAM download handler acquiring the control right may include verifying path information recorded in the specific memory area and proceeding a subsequent download process through the corresponding path. . The binary file of the wireless communication module for telematics according to claim 1, wherein, after the download process is completed, the RAM download handler includes resetting the wireless communication module to download and execute firmware stored in the ROM. How to download. The method of claim 1, wherein the specific memory area in which the path information is stored is designated as a path information exclusive area when all firmware binary files stored in the RAM download handler and the ROM are generated, and the use of the area other than the path information is prohibited. A binary file download method of a wireless communication module for telematics. 4. The method of claim 3, wherein limiting the use of a specific memory area when generating the RAM download handler and the firmware binary file is performed by modifying information of a scatter loader file used at compile time. Binary file download method for wireless communication module. The control module of claim 1, wherein the download path comprises at least one serial communication port for connecting a download device directly to a wireless communication module, a download start command and download binary file data provided by the control module; A binary file download method of a wireless communication module for telematics, comprising one or more serial communication ports connected thereto.

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