topic Re: MK22FX512 Processor Expert RAM configuration in Processor Expert Software

MK22FX512 Processor Expert RAM configuration

lopesjeronimo — Mon, 04 May 2015 14:37:54 GMT

I'm unable to set the correct RAM regions for MK22FX512VLH12 using Processor Expert. It is supposed to have 128KB RAM, so lower address should be 0x1FFF8000, right?

Re: MK22FX512 Processor Expert RAM configuration

santiago_gonzal — Mon, 04 May 2015 18:16:18 GMT

Hello,

If your MCU has 128 Kb of RAM, you will have two blocks of RAM, SRAM_L and SRAM_U (See chapter 3.5.3.2 of RM). Each of them will be 64 KB of RAM = FFFF in Hex

SRAM_L ends at 1FFF_FFFF and SRAM_U begins at 2000_0000. So your RAM memory map will be:

SRAM_L: From 1FFF_0000 to 1FFF_FFFF (64 Kb)

SRAM_U: From 2000_0000 to 2000_FFFF (64 Kb)

Regards,

Santiago

Re: MK22FX512 Processor Expert RAM configuration

lopesjeronimo — Mon, 04 May 2015 18:32:50 GMT

Santiago,

If you check the picture I posted, that's exactly the value I set at PE settings, but PE shows me an error (also showed at the picture).

It seams that this processor PE component has wrong memory settings, like it has only 64KB, because it only allows me to set

SRAM_L: From 1FFF_8000 to 1FFF_FFFF (32 Kb).

Regards,

Jerônimo Lopes

Re: MK22FX512 Processor Expert RAM configuration

santiago_gonzal — Mon, 04 May 2015 18:54:20 GMT

Hello Jeronimo,

You're right, I understood you wrong because of the last sentence: " so lower address should be 0x1FFF8000, right?"

I have reported the issue to the Processor Expert team.

Regards,

Santiago

Re: MK22FX512 Processor Expert RAM configuration

lopesjeronimo — Mon, 04 May 2015 19:06:09 GMT

Yeah, my mistake, sorry about the confusion.

Thanks for your attention.

Re: MK22FX512 Processor Expert RAM configuration

marek_neuzil — Tue, 05 May 2015 13:16:56 GMT

Hello,

You can use the following workaround.

- Switch off the generating of linker file (uncheck the Generate linker file option; see the screenshot below).

- Open the linker file that is located in the Project_Settings\Linker_Files\ProcessorExpert.ld file and modify the m_data and m_data_20000000 memory areas directly in this linker file.

Best Regards,

Marek Neuzil