照着过程做了一遍，能连上，能读chip，可是下载就会出错，我列了两个比较可疑的提示，高手帮我看看
- Connected successfully
Programming and verifying target (11788 bytes, 1 range) ...
- Program (0x0 - 0x2E0B) does not fit into selected flash sectors.
- Program relocated for programming by 0x8000000 bytes
- RAM tested O.K.
- Programming target (11788 bytes, 1 range) ...
    - ERROR: Programming failed @ address 0x08000008 (block verification error)
    - ERROR: Failed to program target
- ERROR: Failed to program and verify target

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