控制的方法是使用DSP 通用定时器设置PWM2 管脚以一定的频率改变高低状态，输出 方波。对于通用定时器周期寄存器的设置，计数值为所需频率计数值的二分之一。-TMS320F2812DSP expansion memory interface (EMIF) is used to connect peripheral devices with the most typical applications such as connecting chip extended memory. This i