Current consumption difference between GNU and IAR builds

[Robert]

I am experiencing a difference in current between the example program during advertising between a IAR compilation and a GNU compilation.

The differences appear to be significant in a range of 10x more power for the GNU during advertising.

[Robert]

BLE event type AdvertisingPeripheral connection
Voltage V

BLE interval ms

TX payload bytes

TX power 40-4-8-12-16-20-40 dBm

Test setup
•Chip: nRF52832QFAAB0 
•Softdevice: s132 2.0.0 
•32MHz crystal (HFXO) 
•32kHz crystal (LFXO) 
•Sleep clock accuracy master and slave: 20 ppm 
•DCDC enabled 

Estimated values

BLE event total charge: 12.3 uC 
BLE event total length: 4.6 ms 
Average BLE event interval: 2005.0 ms 
Total average current:  8.0 uA 

These setting were run on the pc10056 dev kit for both comipilations. I am going to run this again, to make sure that it wasn't something in my setup. Before measuring current, all the cables were disconnected and the board was reset.

[ovrebekk]

Hi Robert

Did you ever get around to running it again, or did you figure out the problem some other way?

Best regards
Torbjørn

[Robert]

Sorry at this time, my focus has been changed to other features.  I will have to look into this again soon though.

[ovrebekk]

No problem Robert. If you need more help with this just let me know.