Extend flash size of nRF9160 - single slot application

Question

Hi, we use nRF9160 and SDK 1.7. 
 in one of our applications, we need more than actually available flash. Now we have ~420kB for application - because we use MCUBoot and dual-slot memory in internal flash. To increase available flash size I want to set a single slot in internal flash and in the next step - set a second slot in the external SPI flash (for the bootloader). 
 So my question is: How to set a single slot in an internal flash and extend available flash for application?

Håkon Alseth · Accepted Answer

Hi, 
 
 Mateusz Gancarczyk said: I use nRF9160-DK (PCA100900.15.0) 
 My apologies, I should have mentioned that you need to switch in the SPI-flash on the DK. 
 This is done by programming the nrf52 device (board nrf9160dk_nrf52840) with any simple example (hello_world or a modified blinky (ie: a empty main loop) for instance), with this overlay applied: 
 / {
 board-control {
 external_flash_pins_routing: switch-ext-mem-ctrl {
 compatible = "nordic,nrf9160dk-optional-routing";
 control-gpios = <&gpio0 19 GPIO_ACTIVE_HIGH>;
 status = "okay";
 };
 };
}; 
 
 Switch the "PROG/DEBUG" switch to "nrf52" mode, configure and flash the project, then switch it back to nRF91 again. 
 
 Kind regards, 
 Håkon

Extend flash size of nRF9160 - single slot application

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