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急 SRIO例程中 FPGA 发送 doorbell频率高时,dsp只收到一次中断,频率低的时候能正常收到doorbell中断

根据办卡修改C6678 srio例程中时钟等相关程序,测试发现FPGA发送doorbell中断给dsp时,doorbell发送间隔为500ms时候,dsp能够正常收到中断,不会掉包,但是当doorbell发送间隔为10ms时候,dsp只能收到一次中断,不知道原因。中断采用的INTDST17,不能设置中断速率,跪求答案?