b_mod_kv

数据结构

typedef struct
{
    uint8_t        init_f;
    const uint32_t dev;
    const uint32_t address;
    const uint32_t total_size;
    const uint32_t erase_size;
    int32_t        write_index;
    uint32_t       write_offset;
    uint32_t       empty_count;
} bKVStruct_t;

typedef bKVStruct_t bKVInstance_t;

接口介绍

// 定义实例，如果存储器不需要擦除，则e_size为0
#define bKV_INSTANCE(name, dev_no, addr, size, e_size) \
    bKVInstance_t name = {                             \
        .init_f = 0, .dev = dev_no, .address = addr, .total_size = size, .erase_size = e_size};


int bKVInit(bKVInstance_t *pinstance);
int bKVGetValue(bKVInstance_t *pinstance, const char *key, uint8_t *pbuf, uint32_t len,
                uint32_t *prlen);
int bKVSetValue(bKVInstance_t *pinstance, const char *key, uint8_t *pbuf, uint32_t len);
int bKVDeleteValue(bKVInstance_t *pinstance, const char *key);
int bKVGetValueLength(bKVInstance_t *pinstance, const char *key);

使用例子

bKV_INSTANCE(gKVInstance, bTESTFLASH, 0, 4096 * 2, 4096);

int main()
{
    ...
    bInit();
    bKVInit(&gKVInstance);
    
    bKVGetValue(&gKVInstance, "boot", (uint8_t *)&boot_count), sizeof(boot_count), NULL);
    b_log("boot : %d\r\n", boot_count);
    boot_count += 1;
    bKVSetValue(&gKVInstance, "boot", (uint8_t *)&boot_count), sizeof(boot_count));
    ...
}