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SRIO与FPGA互联所遇到的问题

尊敬的技术:
您好
现将我们调试SRIO所遇到的问题描述给您:
1·本操作使用C6678及TI所提供的SRIO_LOOPBACK历程稍加改动与FPGA互联(单lane);
2·首先使用LOOPBACK模式配置LSU使其通过Maintenance访问DSP自己的CAR/CSR(近端HOP=1,或者远端HOP=1),均成功;
3·取消LOOP模式,与FPGA互联,在经过DSP的初始化后FPGA端的port已经OK,DSP端(LANE3)的寄存器也反映ok(0x029001B8为0x00000002);
4·但是配置LSU使其通过Maintenance访问,不论是访问FPGA,还是访问DSP自己,都会引起Lsu_Stat的0b001( — Transaction Timeout occurred on Non-posted transaction)置位,并且CAR/CSR的寄存器会变为如附件图所示以下数值;