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请教DSP 6670 srio 消息模式下发送失败的问题

问题现象:终端整机上电后,srio msg消息发送(板内dsp间消息发送)概率性失败(整机上下电重启后,50%几率出错)

 

问题分析:查看srio寄存器,发现如下:

1)Error Management Register中的寄存器Error Detect register(ERR_DET) = 0x01000000

寄存器手册上,位24对应的描述:

24 Packet Response Time-out :A required response has not been received within the specified timeout

                             interval (IO/MSG/GSM logical) (end point device only)

                             Write 0 to clear

                             Write 1 for software debug purposes only

                            

2)CSR/CAR Registers中的寄存器port error and status CSR n(SPn_ERR_STAT) = 0x03020202 

寄存器手册上,各位值对应的描述:  

25 Output Failed-encountered:  Output port has encountered a failed condition, meaning that the failed port

                                error threshold has been reached in the Port n Error Rate Threshold register.

                                Once set remains set until written with a logic 1 to clear.

                               

24 Output Degraded-encountered:Output port has encountered a degraded condition, meaning that the degraded port

                                error threshold has been reached in the Port n Error Rate Threshold register. Once set

                                remains set until written with a logic 1 to clear.

                               

17 Output Error-encountered:   Output port has encountered (and possibly recovered from) a transmission error. This

                                bit is set when bit 16 is set. Once set, remains set until written with a logic 1 to clear.                         

 

9 Input Error-encountered:     Input port has encountered (and possibly recovered from) a transmission error. This bit

                                is set when bit 8 is set. Once set, remains set until written with a logic 1 to clear.

 

1 Port OK:                     The input and output ports are initialized and the port is exchanging error-free control

                                symbols with the attached device (read-only).

 

问题1:上述现象发生原因?

问题2:上述问题如何避免,出问题后如何恢复?

Allen35065:

如果是DSP间传输出问题,信号质量的问题可能性比较大,依次做内部环回,降速等手段进行排查,TX侧可以试着提高TX Swing的值。

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