下载了一个操作flash的程序后，开发板就不能下载程序了，报错如下
Tue Oct 20, 2015 09:38:21: Warning: Too many verify errors, only the first 200 are displayed
Tue Oct 20, 2015 09:38:44: Fatal error: There were warnings during download of FLASH loader, see Log Window Session aborted!
Tue Oct 20, 2015 09:38:44: Failed to load flash loader: C:\Program Files\IAR Systems\Embedded Workbench 6.0\arm\config\flashloader\TexasInstruments\FlashSM470R1B1M.out
Tue Oct 20, 2015 09:38:44: Failed to load flash loader: C:\Program Files\IAR Systems\Embedded Workbench 6.0\arm\config\flashloader\TexasInstruments\FlashSM470R1B1M.flash
但是屏蔽掉flash操作后，下载到一块自己画的板子上就成功的可以下载了。怎么解锁，估计是flash写保护了。
