nokia5110液晶驱动程序，h头文件里定义的动作宏为stm32 cotex-m3 ARM上实现，用户可根据具体环境修改，满足基本需求。 -nokia5110 LCD driver, h header file macro is defined in the action stm32 cotex-m3 ARM to achieve, the user can change depending on the environment, to meet basic needs.