Embedded multimedia card data migration method, system layer and embedded device
An embedded multimedia and embedded device technology, applied in the field of embedded systems, can solve the problems of not being able to increase the service life of the embedded multimedia card, unable to use a large-capacity embedded multimedia card, and having a low service life of the embedded multimedia card, etc. Achieve the effect of reducing after-sales service costs, increasing service life and extending service life
Inactive Publication Date: 2016-09-21
SHENZHEN TCL NEW-TECH CO LTD
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Problems solved by technology
However, the service life of the embedded multimedia card is relatively low, and the number of rewritable times is theoretically 3,000, which is far lower than that of nand flash. It is necessary to increase the total capacity and use the embedded multimedia card controller to ensure that the embedded multimedia card content write balance
However, in the embedded system, due to cost constraints, the embedded multimedia card with large capacity cannot be used, and only using the write equalization algorithm of the embedded multimedia card controller cannot greatly improve the service life of the embedded multimedia card
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[0036] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0037] Such as figure 1 as shown, figure 1 It is the flowchart of the first embodiment of the embedded multimedia card data migration method of the present invention, and the embedded multimedia card data migration method mentioned in this embodiment includes:
[0038] Step S101, when the system layer of the embedded device determines that the embedded multimedia card satisfies the preset migration condition, query the data blocks in the embedded multimedia card whose update times are less than or equal to the preset update times threshold;
[0039] In the embedded multimedia card, due to multiple data updates, the rewritable times of some data blocks are close to the limit value; the number of data updates stored in the other part of the data blocks is less, and the remaining rewritable times are more. However, sin...
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The invention discloses an embedded multimedia card data migration method, an embedded equipment system layer, and embedded equipment. The method comprises the following steps that: when determining that an embedded multimedia card meets a preset migration requirement, the embedded equipment system layer queries a data block which has an update frequency smaller or equal to a preset update frequency threshold value in the embedded multimedia card; and the embedded equipment system layer transmits a migration control instruction to a controller of the embedded multimedia card, controls the controller of the embedded multimedia card to backup data in the data block which has the update frequency smaller or equal to the preset update frequency threshold value, and releases storage space of the data block which has the update frequency smaller or equal to the preset update frequency threshold value, so that the data block which has the update frequency smaller or equal to the preset update frequency threshold value participates writing equilibrium. By the method, the system layer and the equipment, starting from the embedded equipment system layer, the service life of the embedded multimedia card can be effectively prolonged, the whole service life of the embedded equipment can be prolonged, product quality is improved, and after-sale service cost is reduced.
Description
technical field [0001] The invention relates to the technical field of embedded systems, in particular to an embedded multimedia card data migration method, system layer and embedded equipment. Background technique [0002] With the updating of the flash technology, EMMC (Embedded MultiMedia Card, Embedded Multimedia Card) appears, which has a larger capacity and a cheaper price, and has begun to be used on a large scale in embedded systems. However, the service life of the embedded multimedia card is relatively low, and the number of rewritable times is theoretically 3000 times, which is far lower than that of nand flash. It is necessary to increase the total capacity and use the embedded multimedia card controller to ensure that the embedded multimedia card Content write balance. However, in the embedded system, due to cost constraints, the embedded multimedia card with large capacity cannot be used, and only using the write equalization algorithm of the embedded multimed...
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IPC IPC(8): G06F3/06
Inventor 朱海明刘茂林
Owner SHENZHEN TCL NEW-TECH CO LTD