stm32 lcd帧统计例程在timer.c中增加了一个全局变量，通过定时器定时1s钟，然后统计这个时间内LCD的刷屏次数，再通过串口打印出来刷屏的速率。-stm32 lcd frame statistical routines increase in timer.c in a global variable timer timer 1s bell, and then statistics this time, the LCD refresh the number, then refresh t