The problem is solved: I forgot to specify SFRPAGE = CONFIG_PAGE.

P4-P7 work only in CONFIG_PAGE.

Duplicate with 

https://www.silabs.com/community/wireless/bluetooth/forum.topic.html/i_have_a_problemabouttheusartofblesocempty-47n8.

close this one and let us continue addressing the issue with the other thread.

Hi Terry,

If you refer to the Port I/O, Crossbar, External Interrupts, and Port Match section, you will see that only P0.0 and P0.1 can be assigned as VREF and GND for Analog Functions. Screenshot below - 

Which device this question is for, EFM32GG11, EFR32BG22?

Please give the complete OPN.

Which device this question is for, EFM32GG11, EFR32BG22?

Please give the complete OPN.

Once you add FreeRTOS with the Simplicity Studio project module, you have a bit of additional stuff to do.

First you need to copy FreeRTOSConfig.h file from any freeRTOS example in SDK, into your project, take a look at C:\SiliconLabs\SimplicityStudio\v4\developer\sdks\gecko_sdk_suite\v2.5\app\mcu_example\EFM32GG_STK3700\freertos_blink

When you enable FreeRTOS from project properties -> C/C++ build -> project module, you have to Exclude from build folder /Common and exclude also heap_x.c to keep active only one you want (heap_4.c generally is a good candidate) 

Also, configure include path for GNU ARM C Cmpiler according your MCU core

"${StudioSdkPath}/util/third_party/freertos/Source/include"
"${StudioSdkPath}/util/third_party/freertos/Demo/Common/include"
"${StudioSdkPath}/util/third_party/freertos/Source/portable/GCC/ARM_CM33"

BR
rrom