STM32F4寄存器初始化：编码器
RCC->APB1ENR|=1<<0; //TIM2时钟使能RCC->APB1ENR|=1<<1; //TIM3时钟使能RCC->APB1ENR|=1<<3; //TIM5时钟使能RCC->APB2ENR|=1<<1; //TIM8时钟使能GPIO...
