Arduino for STM32

I am a arduino beginer, I had build the STM32-GPSDO file, any error issue shows as follow:


C:\Users\Administrator\Downloads\ArduinoIDE\GPSDO_V006c\GPSDO_V006c.ino17: error: 'TIM_SMCR_ECE' was not declared in this scope
TIM2->SMCR |= TIM_SMCR_ECE; // 0x4000


which file include the TIM_SMCR_ECE ,thanks!

TIM_SMCR_ECE is defined for each mcu by the cmsis device header.
Which MCU you used?
And which stm32 core? Because if you use Roger's core, I don't think the GPSDO library are compatible.

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