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6474门铃中断的问题



麻烦请TI的工程师指点一下

我使用的6474的芯片,有两路SRIO端口,现在已经可以用FPGA给6474发送门铃中断,

但是如何在两路SRIO上区分不同的门铃中断?我想给两个SRIO端口都挂载中断函数,请问如何挂载?