Illegal address access on tms target

varun nayyar

I have a code to calculate the checksum for H0RAM for TMS320 F2812 for a particular size(0x1500). A tester is trying to push the size parameter to data type value (0xFFFF) and not able to do so using GEL scripting.

We all know that the size of memory is limited in each embedded hardware.

1. What is the possible response of the system (F2812) Iin such case?

if the code is:

2. Checksum += ((Uint16 *)0x3F8000)[Memory_Acc_Size];

and if I feed Memory_Acc_Size as 0xFFFF in code composer 4.2.4.0003 debug mode and do a single stepping I don't get any error. What memory will be read in this case?

over 9 years ago

0 Vivek Singh over 9 years ago

TI__Guru** 115881 points

Hi Varun,

Sorry, I am not very clear on the issue you have. Can you explain what do you mean by illegal address and what exact address is in this case.

Regards,

Vivek Singh

0 Vivek Singh over 9 years ago in reply to Vivek Singh

TI__Guru** 115881 points

Hi Varun,

Were you able to resolve this issue? If not then please provide the more detail as requested in last post.

Regards,
Vivek Singh

0 varun nayyar over 9 years ago in reply to Vivek Singh

Prodigy 195 points

Hi Vivek, By illegal address I meant Checksum += ((Uint16 *)0x3F8000)[0xFFFF]; We know the range of H0RAM on F2812, the question is what will be the output/response of Checksum += ((Uint16 *)0x3F8000)[0xFFFF]

0 Vivek Singh over 9 years ago in reply to varun nayyar

TI__Guru** 115881 points

Hi Varun,

Accesses to address location which are not part of memory map is undefined.

Regards,
Vivek Singh

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Illegal address access on tms target