RTOS/AM5728: C66X Instruction fetch exception

user4652979

Part Number: AM5728
Other Parts Discussed in Thread: SYSBIOS

Tool/software: TI-RTOS

I have a complex algorithm which can run on a15_0 and I want to test it on a15. Then there is a problem. When I run the code, there is a instruction fetch exception happened. And the log is following:

[C66xx_DSP1] A28=0x0 A29=0x2
A30=0x804cd868 A31=0xf
B0=0x804cd868 B1=0xf
B2=0x6ef6ff5d B3=0x80af7e11
B4=0x80af0d78 B5=0x80ac27b0
B6=0x80afd600 B7=0x1c
B8=0x80ab0010 B9=0x1
B10=0x80aa39e4 B11=0x80af0d80
B12=0x80af0cd8 B13=0x2
B14=0x5001c B15=0x0
B16=0x80af7e7b B17=0x80acfa24
B18=0x80000000 B19=0xa
B20=0xffff0000 B21=0x80af0d10
B22=0x0 B23=0x80af0d10
B24=0xffffffff B25=0xffffffff
B26=0xfffffff7 B27=0x0
B28=0x66666666 B29=0x30666666
B30=0x804e2a50 B31=0x3
NTSR=0x0
ITSR=0x25
IRP=0x80acb09c
SSR=0xa
AMR=0x80af0d54
RILC=0x80aa8280
ILC=0xa
Exception at 0x40004c8
EFR=0x2 NRP=0x40004c8
Internal exception: IERR=0x1
Instruction fetch exception
ti.sysbios.family.c64p.Exception: line 256: E_exceptionMax: pc = 0x0000002d, sp = 0x00000001.
xdc.runtime.Error.raise: terminating execution

Can yo give me some advice to solve it?

over 6 years ago

0 user4652979 over 6 years ago

Expert 1860 points

I have found when algorithm run to qsort() function the error happened. And I search on the e2e.ti and there is some thread mentioned the error. So,
is this still a bug? My ccs is 8.3.0, compiler is TI V8.2.2 and pdk is pdk_am57xx_1_0_13.

0 lding over 6 years ago in reply to user4652979

TI__Guru* 95265 points

Hi,

The error indicated you run the code on C66x dsp, not A15. Is your code part of the Processor SDK RTOS distribution? What is the package or library name for it? What is this qsort() function? Is your code ported to C66x already?

Regards, Eric

0 user4652979 over 6 years ago in reply to lding

Expert 1860 points

Sorry, I didn't make it clear. The algorithm runs well on a15. And I have ported the code to C66X. The exception just happened when I run it on c66X.

0 lding over 6 years ago in reply to user4652979

TI__Guru* 95265 points

Hi,

No problem. Is this algorithm part of TI code or calling into some TI library? What is this qsort() function? If they are TI code, please provide the detailed test case and we can look at. If it is your own code, you need to use common approach to debug DSP crash by examine the register dumps, any stack over flow, heap usage issue. There are some info on how to debug RTOS exception here: processors.wiki.ti.com/.../Processor_SDK_RTOS:_TI_RTOS_Tips_And_Tricks

Regards, Eric

Processors

Processors forum

RTOS/AM5728: C66X Instruction fetch exception