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TMS320F28388D: sdfm采样后触发的中断配置,无法正常进入

Part Number: TMS320F28388D

想用sdfm1采样出结果后触发中断:

初始化处理:

正常配置完SDfm1后,

SdfmRegs.SDDFPRAM1.bit.AE =1;

SdfmRegs.SDFIFOCTL1.bit.DRINTSEL = 0;

打开中断使能:

PieCtrlRegs.PIEIER5.bit.INTX13 = 1;

IER |= MINT5;

EINT;

ERTM;

根据以上配置,仿真的时候看到

SdfmRegs.SDIFLAG.bit.AF1已经是1了,但是还是不能进入中断函数,请问我的配置还有纰漏的,望指教下