FPU settings浮点运算单元设置

void SystemInit(void){  /* FPU settings 浮点运算单元设置，此处一般不执行---------------------------*/  #if (__FPU_PRESENT == 1) && (__FPU_USED == 1)    SCB->CPACR |= ((3UL << 10*2)|(3UL << ...