未验证 提交 1797687b 编写于 作者: O openharmony_ci 提交者: Gitee

!1261 PR1226已完成,请审核

Merge pull request !1261 from Annie_wang/PR1227
......@@ -2,7 +2,7 @@
- [Sample Code](#section1034515054620)
When porting LittleFS to a new hardware device, you need to declare **lfs\_config**:
Before porting LittleFS to a new hardware device, declare **lfs\_config**:
```
const struct lfs_config cfg = {
......@@ -23,15 +23,15 @@ const struct lfs_config cfg = {
};
```
**.read**, **.prog**, **.erase**, and **.sync** correspond to the read, write, erase, and synchronization APIs at the bottom layer of the hardware platform, respectively.
**.read**, **.prog**, **.erase**, and **.sync** correspond to the underlying read, write, erase, and synchronization APIs of the hardware platform, respectively.
**read\_size** indicates the number of bytes read each time. You can set it to a value greater than the physical read unit to improve performance. This value determines the size of the read cache. However, if the value is too large, more memory is consumed.
**read\_size** indicates the number of bytes read each time. You can set it to a value greater than the physical read unit to improve performance. This value determines the size of the read cache. However, if the value is too large, more memory is consumed.
**prog\_size** indicates the number of bytes written each time. You can set it to a value greater than the physical write unit to improve performance. This value determines the size of the write cache and must be an integral multiple of **read\_size**. However, if the value is too large, more memory is consumed.
**prog\_size** indicates the number of bytes written each time. You can set it to a value greater than the physical write unit to improve performance. This value determines the size of the write cache and must be an integral multiple of **read\_size**. However, if the value is too large, more memory is consumed.
**block\_size**: indicates the number of bytes in each erase block. The value can be greater than that of the physical erase unit. However, a smaller value is recommended because each file occupies at least one block. The value must be an integral multiple of **prog\_size**.
**block\_size** indicates the number of bytes in each erase block. The value can be greater than that of the physical erase unit. However, a smaller value is recommended because each file occupies at least one block. The value must be an integral multiple of **prog\_size**.
**block\_count** indicates the number of blocks that can be erased, which depends on the capacity of the block device and the size of the block to be erased \(**block\_size**\).
**block\_count** indicates the number of blocks that can be erased, which depends on the capacity of the block device and the size of the block to be erased \(**block\_size**\).
## Sample Code<a name="section1034515054620"></a>
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