topic Message RAM in CAN controller on LPC54618 in LPC Microcontrollers

Message RAM in CAN controller on LPC54618

carstenhoffmann — Tue, 23 Jan 2018 16:37:00 GMT

I am using the LPCXpresso54618 demo board with CAN FD kit.

Do I have to instruct the linker not to use the RAM area I dedicated to the CAN controller?

How is this done?

I cannot find any hint in the provided CAN example software.

In the demo the message RAM starts at 0x2001000.

The memory configuration tells the linker to use the whole 160kB RAM area.

Is this correct?

Thanks for your help,

Carsten

Re: Message RAM in CAN controller on LPC54618

carstengroen — Wed, 24 Jan 2018 05:33:12 GMT

Carsten,

please also have a look at Norbert and my findings here: https://community.nxp.com/thread/464785

(sorry, can't help you if you are using MCUExpresso, using Keil on my end)

Re: Message RAM in CAN controller on LPC54618

carstenhoffmann — Wed, 24 Jan 2018 12:27:01 GMT

Thanks Carsten,

I noticed the other thread. Still not solved...

Could there be a correlation between both subjects?

Do you instruct your linker not to use the CAN message RAM?

Re: Message RAM in CAN controller on LPC54618

carstengroen — Wed, 24 Jan 2018 14:44:34 GMT

Hi Carsten,

I use a scatter file for the linker which basically tells the linker to keep away from the memory I have allocated (using the "at" attribute) for the CAN ROM API.

I'm sorry, I don't know the details of the MCUExpresso!

Re: Message RAM in CAN controller on LPC54618

carstenhoffmann — Thu, 25 Jan 2018 16:03:51 GMT

Thank you Carsten,

since this is a beginner's question maybe somebody else can help doing this with MCUXpresso.