topic Re: How to save data in the on-board flash(MBD & MPC5744p)? in Model-Based Design Toolbox (MBDT)

How to save data in the on-board flash(MBD & MPC5744p)?

Zhangfeng1 — Thu, 12 Aug 2021 03:49:43 GMT

Hello everyone!

I have a devkit-mpc5744p.I would like to use Freemaster to edit a variable and save it,it's successfully done.But if i restart the board,the value of this variable becomes the initial value of the Simulink block(data store memory).

Is there any way to save a variable to another address after I edit it, and read the value of that address first when I restart the circuit board?Or there are other ways to achieve this goal, such as adding an external flash module?

Thank you for your attention.

Re: How to save data in the on-board flash(MBD & MPC5744p)?

mariuslucianand — Fri, 13 Aug 2021 08:03:41 GMT

Hello @Zhangfeng1,

As you describe here, you require to have an EEPROM. the MPC5744P can "emulate" the EEPROM functionality but unfortunately, for now, we do not provide such block on the MPC5744P, only for the S32K.

However, the generated code is based on the S32SDK for Power and you can simply take the C code from the example and insert it as a custom code in the MPC5744P model following the procedure described here https://community.nxp.com/t5/NXP-Model-Based-Design-Tools/How-to-use-your-own-C-code-in-our-Toolbox-Battery-Management/ta-p/1119004

Hope this helps,

Marius

Re: How to save data in the on-board flash(MBD & MPC5744p)?

Zhangfeng1 — Sat, 14 Aug 2021 13:12:21 GMT

Hello,Marius.

Thank you for your answer,I'll try this solution.By the way,Is it possible to add this block in the future？I think that would be very useful.

Re: How to save data in the on-board flash(MBD & MPC5744p)?

mariuslucianand — Wed, 18 Aug 2021 07:22:45 GMT

Hello @Zhangfeng1 ,

I will open an internal ticket for that but I cannot promise you when or if this feature will be added.

Regards,

Marius