KR100585529B1 - Method and system for download and version management of cpld - Google Patents

Abstract

The present invention relates to a method and a system for automatically downloading a CPLD when the current CPLD version information is stored in a ROM or the like and checked when the system is booted, and the stored CPLD version data is different from the actual CPLD version. The CPLD download method is a step of comparing the actual CPLD information stored in the CPU with the CPLD version information stored in the memory when the system is booted. If the CPLD version does not match with each other as a result of the comparison, the system is stopped and the system is in the CPLD download mode. And converting the CPLD into a CPLD download module so that a CPLD of a matching version is programmed, downloading and storing the CPLD, and recording new version information of the CPLD into a memory after downloading the CPLD.

CPLD, DTV

Description

CIPD download and version control method, and CIPD control management system {METHOD AND SYSTEM FOR DOWNLOAD AND VERSION MANAGEMENT OF CPLD}

1 is a flowchart sequentially illustrating a CPLD download method according to an embodiment of the present invention.

2 is a configuration diagram sequentially showing a CPLD control management method according to an embodiment of the present invention.

Figure 3 is a block diagram schematically showing the main configuration of a system capable of CPLD control management according to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

301: CPU 303: CPLD

305: EEPROM 307: Flash memory

309: CPLD Downloader

The present invention relates to a CPLD version management and download method and system of a DTV set or set-top box, and in particular, the current CPLD version information is stored in the EEPROM, etc. CPLD version data stored in the pre-stored CPLD version data is the actual CPLD version The present invention relates to a method and a system for automatically downloading a CPLD when it is determined to be different from.

In DTV systems, complex programmable logic devices (CPLDs) or erasable programmable logic devices (EPLDs) for processing system interfaces, external video or audio signal processing, and signal matching in CPU peripherals. Programmable logic device (PLD), etc., and in general, at least one CPLD is used in a DTV product according to a spec.

CPLD provides the necessary basic signals for the entire system to boot and operate, and in the event of any future modifications or changes in the system, it is easier to change the entire system by reprogramming the CPLD without additional hardware changes. It plays an important role in the application. CPLD, which is a key factor in operating such a system, may not operate even with minor modifications or errors. In this case, the entire system may be suspended and a fatal problem may occur.

Therefore, managing the CPLD version of the system from product development to mass production and organizing and storing each program source and image file is very important for system management and prevention of future problems. In the actual production process, the version of the CPLD's production code often does not match the hardware and software of the production product, which makes it impossible to mass-produce.

As such, CPLD is a key element in system operation, and since it is modified and debugged from the beginning of development, version management is required from the development stage.

However, according to the prior art, since there is no device for managing a separate CPLD version, the developer in charge manages the CPLD version by referring to the date and source comments using his own method, and thus, the version management of the CPLD depends on the person in charge. I had to do it. For this reason, CPLD version management is not easy, and when a problem occurs, there are many difficulties such as failure to properly respond.

An object of the present invention is to efficiently manage the CPLD version in the DTV system in order to solve the problems of the prior art, and to prevent system abnormal operation because a version mismatch occurs.

In addition, the development and mass production of CPLD version management through the future to upgrade and manage the history (History) for the previous version to another purpose.

In addition, the previous version of the image code can be re-written, so that even if the CPLD is incorrectly modified to easily return to the previous version to ensure the normal operation of the system.

CPLD download method of the present invention for achieving the above object, CPLD (Complex Programmable Logic Device), CPU, CPLD download in the system including a memory, CPLD download module for downloading the CPLD version information and CPLD from the outside; The method of claim 1, wherein when the system is booted, comparing the actual version information on the CPLD with the CPLD version information previously stored in the memory, and stopping the system operation if the CPLD versions do not match. Switching to a CPLD download mode; downloading and storing a CPLD by programming a CPLD of a matching version in the CPLD download module; and recording new version information of a CPLD in the memory after downloading the CPLD. do.

In the CPLD download method, the memory is EPIROM.

In addition, the system further comprises a flash memory, the flash memory is characterized in that the previous version of the CPLD code image is stored (back-up).

A method of controlling and managing a CPLD version of the present invention includes controlling and managing a CPLD version in a DTV system including a CPLD (Complex Programmable Logic Device), a CPU, a memory in which version information of the CPLD is stored, and a flash memory in which predetermined data is stored. In the method, when a new version of CPLD is upgraded, a backup image of the previous version of the CPLD code is stored in the flash memory. When the system is booted, the CPU stores the actual version information on the CPLD and the CPLD version information stored in the memory. Comparing, and downloading the previous version of the CPLD code image stored in the flash memory when the actual version information on the CPLD cannot be identified or the contents of the CPLD are not stored; and the CPLD is a backup code image on the flash memory. Change the version information of CPLD after downloading from. Comprising the step of writing to the memory, characterized in that for recording history (History) information, including the version, and upgrade information of the CPLD in the memory, and a backup store CPLD code image of at least one or more conventional version of the flash memory.

The CPLD control management system of the present invention is a DTV system including a CPLD (Complex Programmable Logic Device) and a CPU. Flash memory that is backed up and stored, and a CPLD Downloader which allows a new version of CPLD to be programmed and downloaded from the outside in case a version mismatch of CPLD occurs. By comparing the CPLD version information and the actual version information of the CPLD to determine whether there is a version match, if a version mismatch occurs, a new version of the CPLD is downloaded from the outside through the CPLD downloader or the previous version of the CPLD code image is backed up. The previous version of CPLD code from the stored flash memory. And download the images by writing (Re-write) are the CPLD it is characterized in that the control manages the CPLD version.

In addition, the CPLD control management system, when a version mismatch of the CPLD occurs, when a new version of the CPLD program download from the outside, the current version code image of the CPLD is characterized in that the backup and store the flash memory to download after downloading.

In the CPLD control management system, when CPLD is downloaded, update information for version management of CPLD is recorded and stored in the EPROM.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

EXAMPLE

1 is a flowchart sequentially illustrating a CPLD download method according to an embodiment of the present invention.

When the system starts up, booting starts and basic signals necessary to operate such boot and normal operation are provided through CPLD. However, if the CPLD is not normal, the system will halt and cause a fatal error. Therefore, the CPU first checks the CPLD to determine whether it is normal.

First, the system is started by applying power to the system (S101).

The CPU compares the CPLD and the CPLD versions stored in the ROM (S103).

The comparison determines whether the versions coincide with each other (S105). That is, a history of the CPLD version and upgrade is stored in the ROM of the system, and the CPU reads the current CPLD version information on the ROM and compares it with the actual CPLD version to determine whether there is a match.

At this time, when the CPLD version stored in the ROM and the actual CPLD version match (matching), the normal operation of the system starts (S121). If it is determined that there is mismatching, the process switches to the CPLD download mode (S107).

In fact, CPLD in DTV system, etc. is continuously modified as many contents are added or deleted for system interface during development event. Accordingly, as the development proceeds, many versions of CPLD codes are generated, and it is necessary to match them correctly. Therefore, in case of CPLD mismatch, the source code is modified through the CPLD download module. At this time, preferably, the current version of CPLD is backed up and stored in the second memory before downloading and over-writing the new version of CPLD in case of emergency. This will be described in more detail with reference to FIG. 2.

If the CPLD information is changed by downloading the CPLD, the version information of the downloaded CPLD is stored in the ROM (S111). This is to ensure that the system can operate normally only when the new version of CPLD and the CPLD version of the ROM coincide with each subsequent system boot.In order to systematically manage CPLD control, the ROM needs to store and manage such CPLD update information systematically. .

When the CPLD version information is updated and stored in the ROM, the system is operated (S121).

2 is a configuration diagram sequentially showing a CPLD control management method according to an embodiment of the present invention. Hereinafter, the same process as in FIG. 1 will be omitted using the same reference numerals.

The process of starting the system and comparing the CPLD version is the same as that of FIG. 1 described above (101 to 105).

The CPU compares the CPLD versions stored in the CPLD and the ROM with each other (S103) to determine whether the versions match.

If the versions are the same as the determination result, the system operates normally (S121).

If the version is inconsistent as a result of the determination, switch to the CPLD download mode.

In this case, in detail, the contents of the CPLD may be incorrect or may not be able to determine the correct version. In some cases, an upgrade of the CPLD may be required. In the present invention, since the systematic version management and control of the CPLD is possible on the system, it is possible to update the CPLD including all the above cases.

In the case of version mismatch, the CPU checks whether it is possible to grasp the contents of the actual CPLD (S206).

If the CPLD version information on ROM is different from the actual CPLD version information through understanding the contents of actual CPLD, download for CPLD upgrade. At this time, the CPLD code image of the current version is stored in the flash memory before the new version of CPLD is downloaded from the outside and over-written on the CPLD (S208). Code images in actual CPLDs are only a few to tens of kilobytes long, which are backed up in binary form. This is to prepare for the situation where it is impossible to upgrade even if it is impossible to read the contents of CPLD in the process of comparing CPLD versions.

When the current version of the CPLD code image is backed up and stored in the flash memory, the modified version of the CPLD code is downloaded from a process such as modification or deletion from the outside (S209).

Thereafter, the updated information of the CPLD version is stored in the ROM so that continuous CPLD version management is performed (S211).

If the CPLD version information is stored in the ROM, the system operates normally (S121).

On the other hand, in the case of version mismatch, the CPU checks whether the contents of the actual CPLD can be checked (S206), so that the contents of the actual CPLD cannot be read or the version information of the actual CPLD cannot be read. In operation S207, the backup data of the previous version stored in the flash memory of the system is downloaded to the CPLD.

The present invention enables efficient CPLD management and control even within the system using the backup data.

Subsequently, the updated version information of the CPLD is stored in the ROM to continuously manage the CPLD version (S211).

If the CPLD version information is stored in the ROM, the system operates normally (S121).

3 is a block diagram schematically showing the main configuration of a system capable of CPLD control management according to an embodiment of the present invention. The basic hardware configuration of this system is similar to the conventional one, but there is a feature that allows systematic CPLD version management and control.

3 and below will be described the internal configuration of the system and its operation mainly on the functions related to the CPLD version management and control.

The CPLD control management system illustrated in FIG. 3 includes a CPU 301, a Complex Programmable Logic Device (CPLD) 303, an EEPROM 305, a flash memory 307, and a CPLD Downloader 309.

The CPU 301 controls various modules for operating the system, and performs operations such as CPLD version and version matching for control management and CPLD download.

CPLD 303 is composed of a macro cell as a basic logic unit, and provides a basic signal required for the system to boot and operate. It also has version information.

This pyrom 305 records and stores a variety of information necessary for initial booting during system operation, and the CPU 301 acquires the necessary information through the easy pyrom to operate the system. Above all, in connection with the present invention, YPIROM stores and manages version information and other history information of CPLD. However, the ypyrom 305 of the present embodiment is only one embodiment, and may be used, such as a ROM or a pyrom.

The flash memory 307 is backed up and stored in a previous version of CPLD code image in connection with the present invention.

The CPLD Downloader 309 allows a new version of CPLD to be programmed and downloaded from the outside in case of a CPLD version mismatch, or to download CPV backup data of a previous version stored in the flash memory to the CPLD. .

First of all, the CPU 301 compares the CPLD version information stored in the EPI 305 and the actual version information of the CPLD 303 to determine whether there is a version match. When a version mismatch occurs, the CPLD downloader ( The CPLD version is controlled by rewriting the CPLD code image by downloading from an external device or by downloading the previous CPLD code image from the flash memory 307 in which the previous version CPCP code image is backed up and stored. It is characterized by managing.

That is, the CPLD control management system of FIG. 3 corresponds to a system implementing the CPLD download and control management method described with reference to FIGS. 1 and 2.

What has been described in the present embodiment with reference to the accompanying drawings has been described a representative embodiment of the present invention, CPLD download and version control management method of the present invention is not limited to this may be configured in various forms within the scope of the present invention. have.

In addition, it will be apparent to those skilled in the art that the present invention may be applied not only to CPLD but also to the method and system for managing and downloading EPLD described above.

According to the present invention, it is possible to systematically and effectively manage the version according to the contents of the CPLD until the initial development and mass production stage in the DTV system using the CPLD, and the system can automatically detect whether the CPLD version matches, and download can be performed. That effect occurs. Therefore, it is possible to prevent the lock-up of the system due to the CPLD version mismatch in advance.

Claims (7)

A method of downloading a CPLD in a system including a CPLD (Complex Programmable Logic Device), a CPU, a memory in which CPLD version information is stored, and a CPLD download module for downloading the CPLD from the outside, Comparing the actual version information on the CPLD with the CPLD version information previously stored in the memory when the system boots. If the CPLD versions do not match with each other as a result of the comparison, stopping the system operation and switching the system to CPLD download mode; Downloading and storing a CPLD by programming a CPLD of a matching version in the CPLD download module, and And recording history information including version information of the downloaded and stored CPLD in the memory. The method of claim 1, The memory is a CPLD download method, characterized in that the EEPROM (EEPROM). The method of claim 1, The system further comprises a flash memory, The CPLD download method, characterized in that the flash memory has a backup version of the CPLD code image of the previous version. A method of controlling and managing a CPLD version in a DTV system including a CPLD (Complex Programmable Logic Device), a CPU, a memory in which version information of a CPLD is recorded and a flash memory in which predetermined data is stored, When a new version of CPLD is upgraded, a backup image of the previous version of CPLD code is stored in the flash memory. Comparing the actual version information on the CPLD with the CPLD version information previously stored in the memory when the system is booted, and Downloading the previous version of the CPLD code image stored in the flash memory if the actual version information on the CPLD cannot be identified or the contents of the CPLD as a result of the comparison; Downloading the CPLD from a backup code image of a flash memory and recording changed version information of the CPLD in the memory, A method of controlling and managing a CPLD version in a system by recording historical information including a version and upgrade information of a CPLD in the memory, and storing at least one conventional version of at least one CPLD code image in the flash memory. In a DTV system including a CPLD (Complex Programmable Logic Device) and a CPU, EEPROM (EEPROM), which sequentially records upgrade information and previous version information of CPLD, Flash memory in which previous versions of CPLD code images are backed up and stored In the case of a CPLD version mismatch, a CPLD Downloader is installed to allow a new version of CPLD to be programmed and downloaded from the outside. The CPU compares the CPLD version information stored in the EPROM and the actual version information of the CPLD to determine whether there is a version match, and when a version mismatch occurs, a new version of CPLD is downloaded from the outside through the CPLD downloader or transferred. A CPLD control management system, characterized in that the CPLD version is controlled by managing a CPLD code image by downloading a CPLD code image of a previous version from the flash memory where the CPLD code image is backed up and stored. The method of claim 5, If a CPLD version mismatch occurs and a new version of the CPLD is downloaded from the outside, the CPLD control management system, wherein the current version code image of the CPLD is stored in the flash memory and downloaded. The method of claim 5, And when the new version of the CPLD is downloaded, storing version information of the new CPLD in the YPIROM.

Images