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DSP6455响应Xilinx v5 的SRIO Doorbell有限次问题

DSP6455只能响应Xilinx v5 的SRIO Doorbell的有限次:更改了FPGA发送Doorbell的优先级,优先级为0时,DSP可以响应24个Doorbell;优先级为1时可以相应16个Doorbell;优先级为2时,DSP可以响应8个Doorbell。这是为什么???求指教~~

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