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C5509A的GPIO功能

由于我用到TMS320VC5509APGE这款DSP的控制功能,需要较多的GPIO口,请问McBSP内部外设引出的引脚可以用作GPIO,例如控制小灯吗?网上有说可以,但也有说不可以,我不确定。如果可以,TI官网有相关源代码吗?