Increasing RAM Origin and LENGTH results in overflow with stack

[AntonHellbe]

Hi,

I'm trying to add a 3rd Primary Service to my application. I have increased NRF_SDH_BLE_VS_UUID_COUNT to 3 in my sdk_config.h accordingly, and as expected when I run the application the Softdevice asks me to adjust the RAM ORIGIN and LENGTH values, see below:

<warning> nrf_sdh_ble: RAM starts at 0x2000AD68, can be adjusted to 0x2000AD78.
<warning> nrf_sdh_ble: RAM size can be adjusted to 0x5288.
<error> nrf_sdh_ble: sd_ble_enable() returned NRF_ERROR_NO_MEM.
<info> app: Enable BLE stack returned status code: 4
<error> app: Fatal error

However after updating the values in my linker (.ld) file according to the suggested values and trying to build again ARMGCC throws this error:

/usr/local/gcc-arm-none-eabi-4_9-2015q3/bin/../lib/gcc/arm-none-eabi/4.9.3/../../../../arm-none-eabi/bin/ld: region RAM overflowed with stack
collect2: error: ld returned 1 exit status

Does the Softdevice suggest bad values, or what is happening here?

Information:

Board: nRF52832 PCA10040 V1.2.1

SDK: v14.2

Softdevice: S132 version 5.0.0

[Sigurd]

Hi,

The nRF52832 have 64kB RAM, with 0x2000AD78(=43 kB) for the SoftDevice, you have 21 kB left for your application.

If you have increased the NRF_SDH_BLE_GATT_MAX_MTU_SIZE, NRF_SDH_BLE_GAP_EVENT_LENGTH or NRF_SDH_BLE_TOTAL_LINK_COUNT values from the deault, you could try to decrease the values.

Try these values:

#define NRF_SDH_BLE_GATT_MAX_MTU_SIZE 23

#define NRF_SDH_BLE_GAP_EVENT_LENGTH 6