cpld online upgrade method, device and service single board

Abstract

The present invention relates to a CPLD online upgrade method, device and system. The method includes: receiving a CPLD upgrade file sent by a remote control platform; copying the CPLD upgrade file to a local memory, and when receiving the CPLD upgrade command sent by a remote control platform, According to the CPLD upgrade file stored in the memory, the CPLD to be upgraded is logically loaded by simulating the JTAG interface of the CPU. The present invention realizes the remote upgrade of the CPLD of the field equipment without relying on the internal logic of the CPLD to be upgraded, adopts the upgrade method of simulating the JTAG interface, is compatible with the CPLDs of various manufacturers, and has good versatility; and for online upgrade process, CPU reset or Under abnormal conditions such as power failure, the CPLD that has not been upgraded online can be reloaded and upgraded when the system is restarted, which improves the reliability of online CPLD upgrade.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a CPLD online upgrade method, device and service single board. Background technique [0002] In the communication system, a large number of firmware versions need to be used, such as the BOOT version of the processor, the CPLD (Complex Programable Logic Device, complex programmable logic device) logic version and the FPGA (Field Program Gates Array, field programmable logic gate array) logic version, etc. These firmware versions are often not static. When customers request new functions or some defects occur, the firmware version needs to be upgraded. [0003] At present, the BOOT version and the FPGA version are relatively easy to implement online upgrades, while the CPLD logic files need to be programmed with a dedicated cable. Unable to go to the site to upgrade through cables, which brings great difficulties to the on-site upgrade of the CPLD logic version, wh...

AI Technical Summary

Problems solved by technology

[0003] At present, the BOOT version and the FPGA version are relatively easy to implement online upgrades, while the CPLD logic files need to be programmed with a dedicated cable. Unable to go to the site to upgrade through cables, which brings great difficulties to the on-site upgrade of the CPLD logic version, which greatly increases the maintenance cost, and the upgrade process may also cause long-term interruption of the business, which cannot meet the high requirements of the communication system. Requirements for reliability, high stability and maintainability

[0004] In order to solve the problem of CPLD online upgrade, there is currently a CPLD architecture that uses SRAM (memory) plus on-chip FLASH (flash memory) to support online upgrade. However, due to the upgrade of CPLD logic files, it must be carried out carefully. If it is written incorrectly, it may cause Serious consequences, such as causing the business board to fail to power on and start normally

Moreover, in the current CPLD online upgrade solution, each hardware manufacturer mostly relies on the architecture provided by the chip manufacturer. This SRAM+FLASH solution architecture needs to rely on the internal logic of the CPLD to a certain extent when implementing the CPLD online upgrade, and Relevant peripheral circuit processing modules must be designed for a specific manufacturer or even a certain type of chip, which has poor reliability, versatility and portability, and the upgrade process is complicated

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