TMS320F28377S: Uni-Flash Tool Check Checksum

jw,

If you loaded a program in UniFlash and calculated the checksum, and loaded the same program using a third party programmer, it is expected that the checksum value you get in UniFlash will be the same afterwards, as the checksum is calculated based on the data on the flash memory on the target.

If a third party programmer also has a checksum calculation feature, it is not guarantee to match the value from UniFlash, as the checksum formula might not match.

I don't have any experience with using third party programmers, so I'll let someone else answer your bootloader question.

Thanks,

Ricky

Hello, how is the checksum calculated and does. Does the  uniflash  read the device flash content and derive the checksum.

thanks

jw,

UniFlash does not read the flash content directly when calculating the checksum, but instead runs an algorithm on the target side to read flash memory and calculate the checksum.

The target side code for calculating the checksum looks something like this:

for(i = 0; i < size; i++)

{

checksum += (Uint16)(*StartAddr++);

checksum = checksum&0xFFFF;

}

Thanks,

Ricky

hello Ricky, why is the checksum "And" with 0xFFFF;

thanks