移植flashdb遇到查找分区表失败

发布于 2021-10-20 18:34:43 浏览：1334 订阅该版

在移植flashdb时，`fal_partition.c`中
```c
/* find partition table location */
```
部分的
```c
        while (part_table_offset >= 0) {
            if (flash_dev->ops.read(part_table_offset, read_buf, sizeof(read_buf)) > 0) {
                /* find magic word in read buf */
                for (i = 0; i < sizeof(read_buf) - sizeof(read_magic_word) + 1; i++) {
                    read_magic_word =
                        read_buf[0 + i] + (read_buf[1 + i] << 8) + (read_buf[2 + i] << 16) + (read_buf[3 + i] << 24);
                    printf("=================read magic word:%ld===========\r\n", read_magic_word);
                    if (read_magic_word == ((FAL_PART_MAGIC_WORD_H << 16) + FAL_PART_MAGIC_WORD_L)) {
                        part_table_find_ok = 1;
                        part_table_offset += i;
                        log_d("Find the partition table on '%s' offset @0x%08lx.", FAL_PART_TABLE_FLASH_DEV_NAME,
                              part_table_offset);
                        break;
                    }
                }
            } else {
                /* read failed */
                break;
            }
```
没有通过，read_magic_word 值一直都是-1，请问此处用来与0x45503130作比较是什么原理，暂时没明白。谢谢！