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interrupt occur but can not goto right place using starterware on omap-l138

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hi,everyone.  

I am using CCS5.5 and XDS100V2 debug omap-l138,  this is the problem I faced:

I use the starterware example "UartEcho.c" for test. Because I also use boot.asm so The arm core is in

supervisor mode when start. And it can print string on terminal. but when I use Uart interrupt to recieve a string , I found it's not working . there is what i conclude:

1, I am sure the interrupt has occured. because when i put a char on terminal, CCS shows that the pc of arm go to a                   place which is very strange. Otherwise it worked well. so this means that register configuration is right.

2,I am sure The VBR and VSR of AINTC is configured properly.

3, I am sure the arm core is working in supervisor mode.

4, I think maybe it's about vector or something, but I can not find.

Is there anyone who had the same problem?

if someone can help , I really appreciate it,  thanks.


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