Options IAR: General Options -> : ->Target -> Device = ST STM32F072C8 -> Library Configuration -> CMSIS = Use CMSIS C/C++ Compiler->: ->Optimization -> Level = Medium (if Low then CPU Clock slow down (i dont know why) ) ->Preprocessor: $PROJ_DIR$\..\inc\ $PROJ_DIR$\..\..\Libraries\CMSIS\Device\Include\ $PROJ_DIR$\..\..\Libraries\STM32F0xx_StdPeriph_Driver\inc\ $PROJ_DIR$\..\..\Libraries\FreeRTOS $PROJ_DIR$\..\..\Libraries\FreeRTOS\include $PROJ_DIR$\..\..\Libraries\FreeRTOS\portable\IAR\ARM_CM0 $PROJ_DIR$\..\..\Libraries\LTimers $PROJ_DIR$\..\..\Libraries\Time $PROJ_DIR$\..\..\Libraries\Head_Task $PROJ_DIR$\..\..\Libraries\LED_Driver $PROJ_DIR$\..\..\Libraries\NixieDriver $PROJ_DIR$\..\..\Libraries\Button $PROJ_DIR$\..\..\Libraries\Indicate $PROJ_DIR$\..\..\Libraries\TouchSense $PROJ_DIR$\..\..\Libraries\TouchSense\STMTouch_Driver\inc ->Defined symbols: USE_STDPERIPH_DRIVER STM32F072 Output Converter -> ->Output=Generate additional output-> Output Format= Intel extended -> Output file=Override default=NixieLUT.hex Linker-> ->Config->Linker configuration file = Override default=$TOOLKIT_DIR$\config\linker\ST\stm32f072x8.icf Debugger-> ->Setup->Driver=ST-LINK ->Device description file = Override default=$TOOLKIT_DIR$\CONFIG\debugger\ST\STM32F072C8.ddf