PCA10040 Blinky problem

[DanKA]

Hello,

i use IAR EWARM 8.20.2 and SDK 12.3.

I compiled the blank Blinky example from the SKD for the pca10040 without any Errors or Warnings. When i load the .hex to the board, only LED1 is blinking. 500ms ON, 500ms OFF. It seems like  LEDS_NUMBER is = 1.
I did not made any changes to the Project. When i use the Debugger ("Step Into"), i am able to get the Programm to work as expected: LED1...LED2...LED3...LED4...!LED1...!LED2...!LED3...!LED4. Using "GO", only LED1 blinks.  

The .hex-files differ. I attech them both.  Using the same SDK on the PCA10028 works well for me. 

Where should i start? Which files can i provide to get a solution or explanation?blinky_pca10040 (2).hexblinky_pca10040.hex

Kind regards

[DanKA]

the provided hex-file for the pca10040 works as well

[Edvin]

Hello,

I can see the same behavior as you do, except for the debug/stepthrough. It always toggles only one LED. I am not quite sure why it reacts like this, but I see that it updates i inside the main loop, but it gets reset to 0 before it executes bsp_board_led_invert().

It is probably something with the compiler, but as a temporary workaround, I figured that turning off "instruction scheduling" in the optimization settings (options -> c/c++ compiler -> Optimizations -> and uncheck instruction scheduling. 

Can you check if you have the same behavior when you disable this? In my case, it now blinks all the LEDs.

Best regards,

Edvin

[DanKA]

Hello,

turning off "instruction scheduling" worked - it blinks all LEDs as expected. Thank you very much.

Kind regards