S130 Target Memory Modification

[Wedy Hsiao]

Hi,

Recently, I was trying to established an application based on ble_app_hrs with PCA10028.

The MCU I used is nRF51822_xxac (256KB), S130 for softdevice and the SDK is 12.3.

The original target memory setting is:

IROM1 start 0x0 size 0x40000

IRAM1 start 0x20000000 size 0x8000

Before I add my program in the project the Program Size: Code=29680 RO-data=460 RW-data=444 ZI-data=4932. -> Flash Successfully.

After I programmed my code, the size become like this: Code=42980 RO-data=1804 RW-data=940 ZI-data=7700  -> It will show as below picture

 This hex file has data in SoftDevice region.

Thus, I would like to find someone to guide me how to modified the setting to meet my requirement.

Thanks.

[Edvin]

If you started out with ble_app_hrs, then I suggest that you try to use the memory target settings that come with this example:

What you are currently seeing is that you try to program your application with the flash settings set to the entire flash of the chip, but need to save space for the softdevice in the bottom of the flash. 

The softdevice also requirre some RAM (IRAM1), so set these settings as well. The RAM requirement may change in your application, but it should be printed in the log if you need to adjust it. 

Best regards,

Edvin

[Wedy Hsiao]

May I know how do you estimate this?

[Wedy Hsiao]

The screen shot is from SDK16.

I just remove the log function, the RAM is not enough to run my application.

[Edvin]

Are you using the nRF51? That isn't suited for SDK16. 

If you just unzip a new unmodified version of the SDK12.3.0, and compile the ble_app_hrs example, that should come with the correct flash and ram settings for your chip.

[Wedy Hsiao]

For SDK16 I used nRF52.

I assumed that I know how to do the size assessment. 

Thanks for your assumed that I know how to do the size assessment. 

Thanks for your guide. 

[Edvin]

So did you change the RAM assesment? What IDE do you use? Segger Embedded Studio or Keil?

[Wedy Hsiao]

Yes, I just changed the assessment, and it worked.

The IDE I used is Keil.