arm的几个小实验，包涵lcd ,led interrupt,pwm,iic等，希望对大家有所帮助-Several small experimental arm，i am a newer here ,i have no scoucre code any more ,so sorry

主要用在057液晶屏的地方，驱动该液晶屏，通过PWM波形。频率主要是200HZ。采用定时器设置。-Mainly used in the 057 LCD screen in place, drive the LCD screen, the PWM waveform. Frequency is 200HZ. Using the timer setting.

主要在mini2400上实现控制电机转速，在自带lcd屏上显示转速，占空比等。-mini2440 stepmotor pwm

基于mini2410的小实验，功能包含了led流水灯、数码管、pwm蜂鸣器、按键识别、ad转换、eeprom练习、lcd屏幕实验、贪吃蛇小游戏等功能。-Based on mini2410 microprocessor, the function including led test, digital number, pwm buzzer, button recognization, ad convertion, eeprom test, lcd test, snake game, etc.