S32K3 the difference in MPU configuration between RTD2.0.0 and RTD3.0.0

[feiyiniu]

Based on  RTD2.0.0,modify the memory space of link file(.ld) ,as follows.hardfault error often occur during debugging.Later, follow the MPU configuration in RTD3.0.0 system.c ,there is no hardfault error.So i want to know the difference in MPU configuration between RTD2.0.0 and RTD3.0.0.Thanks！

[Senlent]

Hi@feiyiniu

What is your part number?

I checked the MPU configuration of S32K312, RTD 2.0 as well as 3.0, it's all the same.Can you tell which configuration of the MPU you modified? so that i can reproduce this problem.

[feiyiniu]

Thank you  reply!

Part number is S32K312NHT0VPBST.

I check the system.c about MPU configuration,as follow.

[Senlent]

Hi@feiyiniu

I interpreted the difference between these two register configurations

0x01040021 & 0x03080021

       XN     AP      TEX  S  C  B  SRD        SIZE

000  0  0  001 00 000  1  0  0  00000000 00 10000 1

000  0  0  011 00 001  0  0  0  00000000 00 10000 1

you can find MPU_RASR register definition here:CM7 MPU Register   

MPU_RASR->AP

You can see that RTD2.0.0 has set access rights to this 64kb space, while RTD 3.0.0 has not set access rights(Full access)