S32K144: How to generate a true random number?

[Ashlie]

Hello,

   I want to get a true random number,not a pseudo random number, with the help of S32K144MCU's own registers. But I don't know which registers I should choose or what steps I should take.

   Please give me some advice.

   Thanks a lot.

Ashlie

[lukaszadrapa]

Hi,

just some ideas:

- measure some noisy signal (if available) by ADC

- use some fast-running timer and read its value on the basis of some asynchronous event (like PLL lock time, receiving of a message from external world...)

- ...

In all cases, you can use generated number (or part of the number) as a seed value for calculating of pseudo random number.

Regards,

Lukas