Non-volatile data storage method and device

Abstract

The invention discloses a non-volatile item storage method and apparatus. The method comprises the steps of putting non-volatile (NV) items in a file system of a modem side in a first sub-region, and putting other items in the file system of the modem side in a second sub-region; and when it is identified that a board side boots normally, modifying a download plug-in code so as not to erase the NV items that are in the file system of the modem side and are in the first sub-region and not to download a version file in the file system of the modem side. Through adoption of the method and apparatus, different items of the same baseline can share one production version, so that the workload of developers is reduced, and the development efficiency is improved; and when a mobile broadband (MBB) device is returned to the factory to repair, it is not needed to disassemble the device to recalibrate radio frequency nv if a sub-region table is adjusted, so that unnecessary loss is reduced.

Description

technical field [0001] The present invention relates to the technical field of communications, and in particular, to a non-volatile data (Non-Volatile Item, NV data for short) storage method and device. Background technique [0002] The NV data of MBB (Mobile Broadband, mobile broadband) products are stored in the file system on the modem side of the modem. Since the file system on the modem side needs to be downloaded repeatedly during the upgrade process of the MBB product version each time, it is easy to cause the NV data stored in the modem Configuration files and RF calibration NV data in the side file system will be lost. [0003] In view of this situation, there are currently two main technical solutions for NV data storage of MBB products: [0004] Option 1: Back up the NV data in the file system on the modem side to a PC (personal computer, personal computer). After the version is upgraded, restore the NV data backed up on the PC to the file system on the modem sid...

AI Technical Summary

Problems solved by technology

[0007] First, the problem of partition adjustment: in order to save the cost of flash space, it is usually necessary to adjust the flash partition in some applications so that a specific customized UI version can be placed

Based on this, the flash partition of the PV version in the front section is different from that of the delivery version in the back section. When upgrading the version, all the flash needs to be erased, which makes the above solution 2 unfeasible.

At this time, the upgrade tool must use the PC backup NV data method described in the above-mentioned solution 1. Adopting this technical solution will seriously affect the upgrade efficiency and success rate, and bring risks to production consistency and quality management.

[0008] Second, TCXO (Temperature Compensate X'tal (crystal) Oscillator, Temperature Compensated Crystal Oscillator) calibration problem: It is known that the TCXO clock calibration scheme is adopted on the Qualcomm 9K series platform. The inventors found that in actual production Regardless of whether the above scheme 1 or scheme 2 is used to restore the NV data, there is a certain probability that the clock calibration parameters will change when the NV data is restored, and these changed parameters are usually more important radio frequency index parameters. Once these parameters are abnormal, the It will seriously affect the performance of RF indicators, which will lead to serious quality accidents such as failure to register when starting up

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