用于L298N对直流电机的全部控制代码，包括正反转和速度的控制。-For L298N DC motor control code, including reversing and speed control.

mini2440的两路pwm驱动程序，可以控制直流电机的正反转和转速-mini2440 two PWM driver, you can control the the positive DC motor and speed

利用8255，8253对直流电动机的转速进行测量，并设计算法控制占空比输出，绘制实时波形-DC motor speed measurement and control, VC use 8255,8253 realize the measurement of motor speed control algorithms with and set to draw waveforms