New DCF record Addition

[scharaku]

I have a cmm file which adds  a DCF record. I have used this for programming the record.

Eg:

  data.set 0x00400300 %QUAD 0x05AA55AF00000000 ;DCF Start Record

  data.set 0x00400310 %QUAD 0xD3FEA98B00080008 ;STCU SKU Key 1

Using debugger I can see the data in DCF record area.

Now I want to add a new a new record using again cmm file, would you please inform which one should I use from the following:

1)

  ;data.set 0x00400300 %QUAD 0x05AA55AF00000000 ;DCF Start Record

; data.set 0x00400310 %QUAD 0xD3FEA98B00080008 ;STCU SKU Key 1

data.set 0x00400318 %QUAD 0x2C01567400080008 ;

In above case the first 2 records are commented as I do not want to write the area which is already written.

2)

data.set 0x00400300 %QUAD 0x05AA55AF00000000 ;DCF Start Record

data.set 0x00400310 %QUAD 0xD3FEA98B00080008 ;STCU SKU Key 1

data.set 0x00400318 %QUAD 0x2C01567400080008 ;

In above case I have added new record keeping the old records as it is. If I do this way then will I face any problem, as I am trying to write the same record with same value again in OTP area or will it be fine?

MCU : MPC5746R

Debugger : Laughter Bach

[petervlna]

Hi,

for add a record is enough to enter record on first empty space in UTEST memory starting from 0x400300.

Exactly here it is 0x400318

Lauterbach example :

d.s 0x400318 %QUAD 0x2C01567400080008

But for your particular case, you want to configure STCU2, then you must add 2 keys in order to unlock STCU2 control registers for write.

Peter