topic Re: Register Protection in MPC5xxx

Register Protection

xiaobozheng — Thu, 16 Feb 2017 05:22:38 GMT

hi:

is there any Register Protection (REG_PROT)(mpc5744p) software sample or document? thanks!

Re: Register Protection

lukaszadrapa — Thu, 16 Feb 2017 06:45:08 GMT

Hi,

take a look at

https://community.nxp.com/message/830141

Regards,

Lukas

Re: Register Protection

xiaobozheng — Thu, 16 Feb 2017 08:54:58 GMT

there is another problem,

CLR_SOFTLOCK32(INTC_0.BCR.R);
GET_SOFTLOCK(INTC_0.BCR.R, lock);

this two function will cause an reset , means we can not access 0xfc043800 ( the Soft Lock Bits area of INIC module). why this is happen?

Re: Register Protection

lukaszadrapa — Mon, 20 Feb 2017 14:12:46 GMT

Hi,

see the Appendix A on page 2843 in the reference manual:

http://www.nxp.com/assets/documents/data/en/reference-manuals/MPC5744PRM.pdf

There's a list of registers which can be protected. There's no INTC_0.BCR, so the lock bits are not implemented and the write access will lead to bus error.

Regards,

Lukas