data flash partition

[814420552]

hello,

I am confused with S32k146 EEPROM partition and have got some examples but slao confused,  I want to partiton more than one time such as two times, what are the steps for the partiton,and what's the meaning of every step? 

wish your help,

thanks 

[danielmartynek]

Hello 814420552@qq.com,

I believe it was answered here:

How to remove S32K148 DFlash Partitioning 

BR, Daniel

[814420552]

hello,

   base on my question above,  do  call API FLASH_DRV_EraseAllBlock  should be in SRAM boot not in flash boot or else boot?

[danielmartynek]

Hello 814420552@qq.com,

Yes, the function must be in SRAM, all the Flash blocks are erased by the Erase All Blocks /  Erase All Blocks Unsecure commands.

Or it can be mass-erased externally.

BR, Daniel

[814420552]

hello Daniel

   

      as above describe, first must remove  keys,  but how can i know are there keys? is there a register for me to check whether enabled CESc and key size ,after this call commands CMD_DBG_CHAL and CMD_DBG_AUTH

[lukaszadrapa]

Hi Kui,

let me jump into this thread.

I used this procedure during testing of CSE: anytime I had some troubles, I tried to do mass erase. I usually use Lauterbach debugger, so I tried flash.UNSECUREerase command. If whole flash was erased, I could start over. If not, it meant that I need to use CMD_DBG_HAL and CMD_DBG_AUTH commands to reset the partition/CSE. If this doesn't work too, then there's last option - MASTER_ECU_KEY is missing, so it's necessary to load it and then run the command to reset partition. With this approach, I was always able to get back to start point. Notice that you need to know MASTER_ECU_KEY otherwise you won't be able to execute CMD_DBG_AUTH.

Regards,

Lukas

[814420552]

hello 

      why call FLASH_DRV_EraseAllBlock API can't erase the data in 0x6000？

[814420552]

<1>so the result is only use  Erase All Blocks command  to remove the partition and erase PFlash and FlexNVM and IFR？

<2>if has no EEPROM partition ，we can use Erase Blocks command  to erase flexNVM no erase PFlash？

is it right for my understanding?

[danielmartynek]

Hi Kui,

Yes, correct.

1. Erase All Blocks, Erase All Blocks Unsecure, External mass-erase.

2. The DFlash block can be erase by the Erase Flash Block if the FlexNVM is configured for DFlash only.

In addition, the CSEc command can be used (as discussed in the thread above) to remove the partitioning, but this would required to have the CSEc keys stored first.

BR, Daniel

[814420552]

hello，

      thanks for your answer， if  this example can remove this partition， does function FLASH_DRV_DEFlashPartition  can partition again, is it right？