请教DSP 6670 srio 消息模式下发送失败的问题

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请教DSP 6670 srio 消息模式下发送失败的问题 [复制链接]

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？