#if defined(
STM32F410Tx) || defined(STM32F410Cx) || defined(STM32F410Rx) || defined(STM32F446xx) || defined(STM32F469xx) ||
defined(STM32F479xx)
uint32_t PLLR; /*!< PLLR: PLL division factor for I2S, SAI, SYSTEM, SPDIFRX clocks.
This parameter is only available in STM32F410xx/STM32F446xx/STM32F469xx and STM32F479xx devices.
This parameter must be a number between Min_Data = 2 and Max_Data = 7 */
#endif
//正文
第一行最后有个""是什么意思?
去掉之后编译就会出错。