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参考ota.c文件里面的flash操作部分，根据A区固件大小得出的擦除起始地址，但是使用flash_erase失败，返回值是0，flash的数据没有改变；写也是一样的，flash的数据没有任何变化；FR8008GP有没有完整地OTA示例，卡在了flash这一步