1voidHSE_SetSysClockTo72(void)2{3__IO uint32_t StartUpCounter =0, HSEStartUpStatus =0;45//把RCC外设初始化成复位状态,这句是必须的6RCC_DeInit();78//使能HSE,开启外部晶振,野火开发板用的是8M9RCC_HSEConfig(RCC_HSE_ON);1011//等待 HSE 启动稳定12HSEStartUpStatus =RCC_WaitForHSEStartUp()...