Comments (15)
理论上不存在这种情况,默认都是上电会检测 Flash 是否有做过格式化,必要时,系统会自动对 Flash 完成格式化动作
格式化时就会对 Flash 执行擦除动作
from flashdb.
from flashdb.
手动 fdb_kv_set_default 试一下?
from flashdb.
from flashdb.
from flashdb.
朱经理你好,在fdb_utils.c文件中,请问:
fdb_err_t _fdb_write_status(fdb_db_t db, uint32_t addr, uint8_t status_table[], size_t status_num, size_t status_index)
{
......
#if (FDB_WRITE_GRAN == 1)
-------//这个函数在运行之前,程序中,由针对addr + byte_index这个地址所在扇区进行格式化了吗?
result = _fdb_flash_write(db, addr + byte_index, (uint32_t *)&status_table[byte_index], 1);
#endif
........
}
from flashdb.
写之前肯定是有擦除,否则也没法写入的
from flashdb.
from flashdb.
用户不需要考虑擦写的时机,只需提供好移植函数就好,建议详细参考下 demo 文件下的示例,并在真机上试用
from flashdb.
from flashdb.
gitee 上也有,可以搜一下
from flashdb.
朱先生你好,我的SPI Flash并没有采用SFUD,而是FlashDB的fal port接口直接以扇区读、写和删除nor Flash,请问:
/* the flash write granularity, unit: bit
- only support 1(nor flash)/ 8(stm32f2/f4)/ 32(stm32f1) */
#define FDB_WRITE_GRAN 1
----请问这个需要设置为多少?
from flashdb.
使用的是SPI Flash:W25Q256,每个扇区的大小为:4096字节
from flashdb.
结帖。
将程序实现看了一遍,学习了朱先生的设计精巧之处。特别是针对Nor Flash的写入特点,巧妙的以bit设置状态位实现KV状态的设置,进而实现了所谓“掉电恢复”的功能。
from flashdb.
“磨损均衡”的实现也很巧妙。
from flashdb.
Related Issues (20)
- 分区越大,插入速度越慢 HOT 2
- sfud_flash_def.h 部分有误 HOT 4
- KVDB Demo 运行出错 HOT 1
- linux的demo程序第一次运行都会卡住 HOT 2
- Error: The KV (@0x0000FF4F) CRC32 check failed!
- Support wear balance
- tsdb
- FR:tsdb读取最新一条数据内容 HOT 1
- TSDB能否调整为递增序列式。 HOT 1
- V2.1.0使用tsdb遇到一个问题,假如tsdb刚好全部写满的时候重启了,再次开机 初始化tsdb的时候,会出现oldest sectors is 0x00000FFF, current using sector is 0xFFFFFFFF, 导致后续无法写入 HOT 1
- 迭代器无法遍历所有键值对 HOT 2
- FDB_GC_EMPTY_SEC_THRESHOLD我想问这个能设置成0吗,我现在只想分配2个扇区给flashDB
- fdb_tsl_status_t end_info_stat[2]这里结束信息为啥需要2呢? HOT 3
- 如何主动进行一次GC
- tsdb 写数据的时候突然重启设备,重启后设备 db->last_time 变成0开始 HOT 10
- 提前标记sector为GC状态,并在kv iterator中跳过待GC的区块 HOT 4
- 希望更新一下RT-Thread 软件包 HOT 2
- FAL 组件里面的 device_table 和 device_table_len 用 const 声明编译器可能会分配 0 地址 HOT 2
- kvdb写满后,写入同名键值对无法写入无法覆盖,且kv大小是扇区的一半时,空间利用率最差,只有一半,fdb_kv_print打印的kv也不全但是get能读到 HOT 1
- [QUESTION] Can this work with ESP32 arduino?
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from flashdb.