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ECC algorithm(calculation) for tms570

Other Parts Discussed in Thread: NOWECC, TMS570LS1227

Dear TI Experts

I am confused about the ECC algorithm.

I use the nowecc tool to generate the ecc code.    for example: 

I made a 64bit data with all 0   (.hex  format file)

:080000000000000000000000F8
:00000001FF

and the ecc generated is 0x0C as shown:

:02000004F040CA
:010000000CF3
:00000001FF

the ecc calculation is using XOR,  if the data is 0 , the ecc should be 0 too

Many thanks

Leo