Posted on April 07, 2014 at 06:06I encountered the similar issue recently. I used 25MHz crystal. The MCU was STM32F207VGT6. And I used STMicro standard library STM32F2xx_StdPeriph_Lib_V1.1.0. The system_stm32f2xx.c was generated by use of STM32F2xx_...