HRPWM SFO（）函数

使用如下TI提供的部分程序

status = SFO_INCOMPLETE;

while (status == SFO_INCOMPLETE)// Call until complete

{ status = SFO(); }

if(status!=SFO_ERROR)// IF SFO() is complete with no errors

{ EALLOW; EPwm1Regs.HRMSTEP=MEP_ScaleFactor; EPwm2Regs.HRMSTEP=MEP_ScaleFactor; EDIS; }

if (status == SFO_ERROR) { while(1);

// SFO function returns 2 if an error occurs

// The code would loop here for infinity if it

// returns an error } //

SFO()函数总是返回数值2，也就是SFO_ERROR，导致最后进入死循环，请问下这是什么原因