Question about HelloWorld example

You had an Opcode exception at 0x8000EE28.  Basically it means the CorePac attempted to execute an illegal Opcode. 

This could be due to a number of different things.

1.) DDR wasn't configured correctly so you had garbage data in DDR and when you tried to execute from it it was grabbing garbage data

2.) Your code ran off into the weeds and you're executing garbage data.

3.) Something such as your stack overflowed into an area where you have program and when it tried to execute it, it was garbage.  I see your SP (B15 is used as SP) is in L2 so this is not likely.

Anyway, you should open up a disassembly window in the debug mode and set the location to where the opcode exception is (0x8000EE28) and start looking at what could be the issue.  Set the PC to that address, make sure you have associated code w/ it, etc.

Best Regards,

Chad

Thanks Chad for your quick response!

Since I am not experienced in debugging the codes, I am wondering what I have done wrong running the example. I think the purpose of this simple example is to help a newbie like me to get on track quickly, so debuging it is beyond me. If I do everything as is supposed, can I get this out of box example running?

What I did is:

-set the boot mode dip to "NOR boot on image 0 (default)"  (the noboot mode is also tried), and power on

-Make a target configuration file evmc6678l_xds100v1.ccxml, and launch it. (This turned out to be correct, because I have run it with the HUA example successfully)

-Connect the target C66xx_0, load the gel file evmc6678l.gel, and run the script global_default_setup.

-Load the program C:\TI\mcsdk_2_00_00_beta2\examples\ndk\helloWorld\evmc6678l\Debug\helloworld_evmc6678l.out to C66xx_0, and run it.

Is this the right procedure?

I have also tried to step through the codes, and it breaks down at  line 103 of evmc6678.c:

100 /* PLL WORK AROUND FOR THE SI BUG */ 101 /* Reset the PLL, wait at least 5 us, release reset */ 102 ctl = ctl | 2; 103 PLLCTL_REG = ctl;

with the error:

C66xx_0: Trouble Reading PC Register: The target does not have a CPU clock.   (Error -1178) @ -2147423012 (0x8000ECDC)

C66xx_0: Trouble Reading Register CSR: The target does not have a CPU clock.   (Error -1178) @ 65 (0x41)

C66xx_0: Trouble Reading Memory Block at 0x857fc0 on Page 0 of Length 0x4: The target does not have a CPU clock.   (Error -1178) @ 8748992 (0x857FC0)

C66xx_0: Call Stack: Cannot unwind further: Target failed to read memory at 0x00857FC0

C66xx_0: Trouble Reading Memory Block at 0x857fb4 on Page 0 of Length 0x4: The target does not have a CPU clock.   (Error -1178) @ 8748980 (0x857FB4)

C66xx_0: Trouble Reading Memory Block at 0x857fa4 on Page 0 of Length 0x4: The target does not have a CPU clock.   (Error -1178) @ 8748964 (0x857FA4)

C66xx_0: Trouble Reading Memory Block at 0x857fac on Page 0 of Length 0x4: The target does not have a CPU clock.   (Error -1178) @ 8748972 (0x857FAC)

C66xx_0: Trouble Reading Memory Block at 0x857fb0 on Page 0 of Length 0x4: The target does not have a CPU clock.   (Error -1178) @ 8748976 (0x857FB0)

C66xx_0: Trouble Reading Memory Block at 0x857fbc on Page 0 of Length 0x4: The target does not have a CPU clock.   (Error -1178) @ 8748988 (0x857FBC)

C66xx_0: Trouble Reading Memory Block at 0x857fb8 on Page 0 of Length 0x4: The target does not have a CPU clock.   (Error -1178) @ 8748984 (0x857FB8)

C66xx_0: Trouble Reading Memory Block at 0x857fa8 on Page 0 of Length 0x2: The target does not have a CPU clock.   (Error -1178) @ 8748968 (0x857FA8)

Something to do with the SI BUG?

Any idea?

BR

Chunjian

Hi Travis

It works after I updated the MCSDK to the newest version. Thanks a lot!

Regards,

Chunjian