STM32 利用FlashDB库实现在线扇区数据管理不丢失

记录运行日志：存储产品历史的运行日志，异常告警的记录等

KVDB 键值数据库介绍

• 🌿KVDB 的基础功能的使用：

记录开机次数：

void kvdb\_basic\_sample(fdb\_kvdb\_t kvdb)
{
    struct fdb\_blob blob;
    int boot_count = 0;

    FDB\_INFO("==================== kvdb\_basic\_sample ====================\n");

    { /\* GET the KV value \*/
        /\* get the "boot\_count" KV value \*/
        fdb\_kv\_get\_blob(kvdb, "boot\_count", fdb\_blob\_make(&blob, &boot_count, sizeof(boot_count)));
        /\* the blob.saved.len is more than 0 when get the value successful \*/
        if (blob.saved.len > 0) {
            FDB\_INFO("get the 'boot\_count' value is %d\n", boot_count);
        } else {
            FDB\_INFO("get the 'boot\_count' failed\n");
        }
    }

    { /\* CHANGE the KV value \*/
        /\* increase the boot count \*/
        boot_count ++;
        /\* change the "boot\_count" KV's value \*/
        fdb\_kv\_set\_blob(kvdb, "boot\_count", fdb\_blob\_make(&blob, &boot_count, sizeof(boot_count)));
        FDB\_INFO("set the 'boot\_count' value to %d\n", boot_count);
    }

    FDB\_INFO("==================================