topic Re: Dual core allocating space for instructions, data and variables in LPC Microcontrollers

Dual core allocating space for instructions, data and variables

dingelen — Mon, 09 Sep 2019 14:23:00 GMT

Hi,

I'm using the MPC55S66 for a new project. This is a dual core and I want to optimally make use of bus and memory structure. So each core it's own code area (flash and sramx) and each it's own working ram.

So my question is how do I setup a project so that:

Core 0 uses:

- FLASH for code and data

- SRAM0 for variables, heap, stack

- USB_SRAM for USB

- SRAM2 shared memory with core 1

Core 1 uses:

- SRAMX for cade and data

- SRAM1 for variables, heap, stack

- SRAM2 shared memory with core 0

I've found the "LPC55xx multicore applications ..." manual and all similar online but they didn't completly answer my question. They only seem to answer how to load Core 1 to SRAMX.

The SDK examples are also not very clear on how to do this.

Thanks!

Tom

Re: Dual core allocating space for instructions, data and variables

Alexis_A — Tue, 10 Sep 2019 23:14:08 GMT

Dear Tom,

I will suggest to check the following posts:

Relocating Code and Data Using the MCUXpresso IDE

Relocating code from FLASH to RAM

This could help you to reallocate code between memories. Also the following thread could help you to know how to place code in different memories.

https://community.nxp.com/thread/506558

Let me know if this helps you.

Best Regards,

Alexis Andalon

Re: Dual core allocating space for instructions, data and variables

chrisgulick — Mon, 16 Sep 2019 01:57:55 GMT

Too bad the RAM allocation is only 32k would be best at 64K min. Also the ability to separate flash banks for true multi MCU

parallel execution from flash.