电脑通过sci发出命令，传给pwm，控制pwm的波形输出，从而控制电机，在程序上怎么做，我现在只是简单地找了个pwm输出的例程f2802x_examples_ccsv4/epwm_up_aq/Example_F2802xEPwm3UpAQ.c，改动了周期，占空比，驱动的舵机。但是sci怎么加入到这个pwm输出程序来？我有个思路就是把pwm输出程序里面的末尾的占空比更新函数的程序换成sci发送占空比的程序，具体怎么换？
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