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TMS320F28P550SJ: tms320的ecap的GPIO应该如何设置

Part Number: TMS320F28P550SJ
Other Parts Discussed in Thread: C2000WARE

根据手册描述,tms320f28p55的ecap模块有一个寄存器进行设置,请问
1、设置完对应哪个引脚,例如ECap1Regs.ECCTL0.bit.INPUTSEL = 0;

2、20-3这张表单如何理解
3、如果要设置为GPIO16如何设置

A 128:1 input multiplexer must also be configured (see Figure 20-3). This multiplexer can select a variety of inputs by configuring ECCTL0.INPUTSEL.