利用DSP的PWM1和PWM2,然后经过了两级放大控制直流电机，若要改变电机转速或转向,可在DSP28_EV.c文件里按相应注释修改，即实现PWM波来控制电机。-Using DSP-PWM1 and PWM2, and then amplified through a two DC motor control, to change the motor speed, or steering, can DSP28_EV.c file comments by corresponding changes