AURIX™ Forum Discussions

[User22498]

Hello，
The memory protection register does not change when entering trap. As shown in the figure below,A2 register changed form address of array kbsw_ws_edm_missing_count_max to the reserved area address 0x0D01F49C of MCU.
So generated memory protection read trap（DSTR.MPE flag）.
I want to know what causes the program to enter trap 1 TIN 2?

[NeMa_4793301]

No idea without seeing more of your code, but how are you using WsSensorType[WsChan] as an index to an array, when the values are all 0x8CFFFFEB? kbsw_ws_edm_missing_count_max only has 3 elements, so using 0x8CFFFFEB as an index seems a bit outside of 0...2.

[User22498]

UC_wrangler wrote:
No idea without seeing more of your code, but how are you using WsSensorType[WsChan] as an index to an array, when the values are all 0x8CFFFFEB? kbsw_ws_edm_missing_count_max only has 3 elements, so using 0x8CFFFFEB as an index seems a bit outside of 0...2.

Thanks for your response. The program only enter the trap when the power supply injects interference. All value of WsSensorType[] array is 3 ，when the power supply is stable voltage of 12V，All value of WsSensorType[] array form 3 to 0x8CFFFFEB when the power supply enter interference from 5.55V to 12.5V.
The power supply and WsSensorType[] array is shown in the figure below.