Working examples for nRF51822

[beginner]

Hi guys,

first of all here is my setup: https://devzone.nordicsemi.com/f/nordic-q-a/42768/nrf51-52---sdk15---linux-gcc-st-link-v2

It seems like nearly none of the BLE examples of SDK12.3 work on my nRF51822 module. So far I only got the beacon example running succesfully. All other examples (for example experiment ble blinky) seem to crash when starting advertising...

Only thing I changed is the MEMORY section in the linker file:

MEMORY
{
  FLASH (rx) : ORIGIN = 0x1B000, LENGTH = 0x25000
  RAM (rwx) :  ORIGIN = 0x20001870, LENGTH = 0x2790
}

and changing the target in the makefile from nrf51422_xxac to nrf51422_xxaa

Is it to be expected that only the beacon examples works with this module?

[Kapil Rawat]

Hi

Please have a look at this link and set your RAM/ROM setting accordingly. 

[beginner]

Hi,

S130 v2.0 from SDS v2.0

• IRAM base - 0x20001870

• IRAM size(16 kB RAM) - 0x2790

• IRAM size(32 kB RAM) - 0x6790

• IROM base - 0x1B000

• IROM size(128 kB Flash) - 0x5000

• IROM size(256 kB Flash) - 0x25000

I already used this as you can see in my post ;)

[Vidar Berg]

Hi,

The RAM base is probably set to low for blinky example. The default linker config for the blinky example looks like this (for xxAC):

MEMORY
{
  FLASH (rx) : ORIGIN = 0x1b000, LENGTH = 0x25000
  RAM (rwx) :  ORIGIN = 0x20001fe8, LENGTH = 0x6018
}

And it should be as simple as subtracting the RAM size by  0x4000 to make it work on xxAA (some examples may require more than 16K of RAM):

MEMORY
{
  FLASH (rx) : ORIGIN = 0x1b000, LENGTH = 0x25000
  RAM (rwx) :  ORIGIN = 0x20001fe8, LENGTH = 0x2018
}