Dear All,
I am calculating check-sum of the entire ROM using a simple 2-byte summation of the entire ROM memory block in application.
Getting reset while passing some particular address range
0X00FE0328 - 0x00FE9345 it is working fine, but for address range 0x00FE0000 - 0x00FFDFFF it is generating reset.
Am I accessing any invalid memory ?
Please find below map file snapshot for more details
SECTION-ALLOCATION SECTION
Section Name Size Type From To Segment
---------------------------------------------------------------------------------------------
.init 62 R 0xFE0000 0xFE003D ROM
.startData 27 R 0xFE003E 0xFE0058 ROM
.rodata 719 R 0xFE0059 0xFE0327 ROM
.text 36894 R 0xFE0328 0xFE9345 ROM
.copy 152 R 0xFE9346 0xFE93DD ROM
PROMID 6 R 0xFFDFFA 0xFFDFFF PROMID_S
.stack 256 R/W 0x1000 0x10FF RAM
.data 164 R/W 0x1100 0x11A3 RAM
Best Regards,
Charudatta
Hello Pascal ,
I am calling given bellow function in 10ms task to calculate checkmate of ROM by performing summation of entire ROM. after compliting summation adding 2's compliment of Result in sum so i will get it zero (0).
bool Calculate_Checksum16_Slice(const uint16_t __far* data, uint32_t size, uint32_t* index, uint16_t* sum)
{
bool checksum_complete;
/* If about to sum the first value in data, clear the sum. */
if (0 == *index)
{
*sum = 0;
}
/* If haven't reached the end of data, add the next word to the sum. */
if (*index < size)
{
*sum += *(uint16_t __far*)(uint32_t)(data + *index); /* Equivalent to data[index]. */
*index += 1 ;
checksum_complete = false;
}
else
{
*index = 0;
checksum_complete = true;
*sum = (~(*sum) + 1) + *sum;
}
return checksum_complete;
}
Thanks & Regards,
Charudatta
Hi Charudatta,
If I'm right this is duplicated with s12z ROM checksum
Did you used the info provided to the Re: Issue while calculating the CRC for logical address block in Flash to create your application ?
Do you refer to an example provided ?
Pascal
Dear Charudatta,
What is the system you're using for the Checksum ?
Can you please share the project or an example ?
Have a great day,
Pascal
NXP Technical Support
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