stm32实时时钟rtc，通过彩屏s6d1121和串口通信显示数据，有按键检测功能，通过按键可以重置rtc，计时清零等。-stm32 real-time clock rtc, serial communication through color s6d1121 and display data, there are key detection function can be reset by key rtc, timer is cleared and so on.