TMS320F2808的芯片，正常的操作，没有改密码，也没有点上锁，突然被锁住，怎么解锁？

wenshuai song

Other Parts Discussed in Thread: UNIFLASH, TMS320F2808

C28xx: Flash Programmer: Device is locked or not connected. Operation cancelled.
C28xx: GEL: File: C:\Users\songwenshuai\workspace_v5_5\test\Debug\test.out: Load failed.

现在换成 flash的cmd文件会出现这个错误提示无法进入debug ，也就无法出现，on-chip选项，

然后我试着在 CCS UniFlash 软件里点unlock 出现下边的错误信息

[07:34:07] Begin Launching session operation.
[07:34:10] Operation Launching session returned.
[07:34:10] Loaded target configuration from: C:\Users\songwenshuai\workspace_v5_5\test\targetConfigs\TMS320F2808.ccxml
[07:34:23] Begin Unlock operation.
[07:34:28] C28xx: Starting device unlocking...

、、[07:34:28] ERROR >> C28xx: Flash Programmer: Error unlocking flash memory. Device is still locked

、、[07:34:28] Error executing Flash operation "Unlock": Unknown error
[07:34:28] Operation Unlock returned.

网上有 28335 被锁定的解锁的方法但是要改boot mode 那个 boot 这款芯片上根本没有

我该怎么办？我确定我没有改密码，