RE: guide to allocate the amount of ram/rom I need

inghowe83 — Wed, 12 Dec 2018 06:52:05 GMT

thank you!

RE: guide to allocate the amount of ram/rom I need

AndreasF — Mon, 10 Dec 2018 14:06:43 GMT

Hi.

I've just posted a tutorial on how to adjust the FLASH and RAM memory, you can find it here.

I suggest you read that tutorial on how you can set the start addresses.

To answer quick:

FLASH_START: The value you choose here is dependent on which SoftDevice you use. The SoftDevice does somethings when you start your Application, and then points to the start address of the Application, which is this address. If you don't use a SoftDevice then the start address is 0x0, if you use only a MBR, then the start address is 0x1000.

FLASH_SIZE: This is the size of the available FLASH, this size should not exceed FLASH_PH_SIZE

RAM_START: This value is also dependent on which SoftDevice you use. This value is the minimum value you can use and still run the Application. It may not perform as expected with this value if your SoftDevice uses many features.

RAM_SIZE: This is the size of the available RAM, (RAM_SIZE + RAM_START) should not be larger than (RAM_PH_START + RAM_PH_SIZE).

FLASH_SIZE and RAM_PH_SIZE is the size of the FLASH and RAM available on your chip.

[quote user=""]

Q3:

And what is the different between the SRAM(0x20000000-0x40000000) vs RAM(0x60000000-0xA0000000) on the Memory map? when I allocate the RAM_PH and RAM_START should I use the SRAM or RAM?

[/quote]

The section RAM(0x60000000-0xA0000000) is not used by anything, I think its in the memory map to display how a memory map looks, as you cant find it in the instantiation table below. For allocating the RAM, just look at the tutorial.

Best regards,

Andreas