{var%20f='http://v.t.sina.com.cn/share/share.php?appkey=1515056452',u=z||d.location,p=['&url=',e(u),'&title=',e(t||d.title),'&source=',e(r),'&sourceUrl=',e(l),'&content=',c||'gb2312','&pic=',e(p||'')].join('');function%20a(){if(!window.open([f,p].join(''),'mb',['toolbar=0,status=0,resizable=1,width=440,height=430,left=',(s.width-440)/2,',top=',(s.height-430)/2].join('')))u.href=[f,p].join('');};if(/Firefox/.test(navigator.userAgent))setTimeout(a,0);else%20a();})(screen,document,encodeURIComponent,'','','https://www.xiaopingtou.cn//data/attach/topic/topicKPo7gB.jpg', '推荐 lpksu 的文章《TI_DSP_SRIO - Doorbell原理（中断路由到core-1）》','https://www.xiaopingtou.net/article-76614.html','页面编码gb2312|utf-8默认gb2312'));){kind=link}
Doorbell的中断到core的机制是由DOORBELLx_ICRRx寄存器实现的，共有八个ICRR寄存器。
When doorbell packets are received by the SRIO peripheral, theseICRRs
routedoorbell interrupt requests（在ISCR寄存器中指示） from the associated doorbell ICSRto
user-selected interruptdestinations. Each of the four doorbells can be mapped to these registers.
每对Doorbellx_ICRR,ICRR2（x=0~3）寄存器与DOORBELLx_ISCR对应（x=0~3）。 因为每个DOORBELLx_ISCR寄存器对应16个中断源，而Doorbellx_ICRR,ICRR2就与该16个中断源一一对应，起到路由ISCR中每个对应的中断源的作用。如若Doorbell2_ICSR寄存器中的ICS6=1，Doorbell2_ICRR寄存器中的ICR6=0010b，这样来自Doorbell2_ICSR中的bit
6的中断将会路由到INTDST2。由下图可知，ICRR寄存器只能把ISCR表示的64个中断源路由到八个INTDST0~7。
