28035 擦除FLASH返回STATUS_FAIL_PRECONDITION

你好：

用28035的flash储存数据，利用仿真器下载程序到flash后运行能够顺利用API函数擦除flash，而掉电重新上电后就不能成功擦除了，返回STATUS_FAIL_PRECONDITION，请问这情况如何解决？？

Young Hu：

您好！

按照下面的步骤试试。

processors.wiki.ti.com/…/FAQs

Precondition Failure

Q: Why is the following the error message generated,"Flash API Error #21 The Erase operation failed the precondition step" while using the CCS flash plugin? ===

A: The most likely cause of this error is accidently stopping the flash erase process before it successfully completes. The error indicates a bad sector or sectors in flash memory. Verify the bad sector(s) by performing the following to avoid using them.

. Invoke the flash plug-in, CCS->Tools-> On-chip programmer.

. Perform the erase operation only on all the sectors. You should see the same error.

. Perform the erase operation only on each individual sectors. By performing this, you should see which of your flash sectors are bad.

你好：

用28035的flash储存数据，利用仿真器下载程序到flash后运行能够顺利用API函数擦除flash，而掉电重新上电后就不能成功擦除了，返回STATUS_FAIL_PRECONDITION，请问这情况如何解决？？

pengyu xu：

您好，请问您的问题解决了么？在调试阶段我也碰到了类似的问题，调用28035_API函数向FLASH扇区写入数据之前需要先进行对应扇区的擦除，在仿真器烧录后运行调试都正常，擦除和烧写实验成功，可是程序脱离仿真环境复位重新加载以后，调用Flash_Erase()函数返回错误代码#21，对应STATUS_FAIL_PRECONDITION，Flash_DepRecover()函数调用也无法解决这个问题，现在这个问题很急，但是一时找不到解决的办法，还请您回复帮助，多谢。