问题描述
当我执行光纤通道仲裁环v1.1内核的Verilog时序仿真时,仿真开始时会出现以下时序错误:
“#**错误:C:/libs/I.25/mti61b /./ simprims_ver / simprims_ver_source.v(23155):$ period(posedge CLKA:202679 ps,:204045 ps,2220 ps);
#时间:204045 ps迭代次数:1实例:/ testbench / FC_INST_1 / \ fc_al_core / BU2 / U0 / fc1_inst / fc1_rx_inst / async_fifo_inst / fifo_ram_inst_0 \
#**错误:C:/libs/I.25/mti61b /./ simprims_ver / simprims_ver_source.v(23155):$ period(posedge CLKA:202682 ps,:204048 ps,2220 ps);
#时间:204048 ps迭代次数:1实例:/ testbench / FC_INST_1 / \ fc_al_core / BU2 / U0 / fc1_inst / fc1_rx_inst / async_fifo_inst / preview_ram_inst \
#**错误:C:/libs/I.25/mti61b /./ simprims_ver / simprims_ver_source.v(23155):$ period(posedge CLKA:202700 ps,:204066 ps,2220 ps);
#时间:204066 ps迭代次数:1实例:/ testbench / FC_INST_1 / \ fc_al_core / BU2 / U0 / fc1_inst / fc1_rx_inst / async_fifo_inst / fifo_ram_inst_1 \
#**错误:C:/libs/I.25/mti61b /./ simprims_ver / simprims_ver_spartan3a_SMART_source.v(9669):$ period(posedge RXUSRCLK2:202795 ps,:204161 ps,2750 ps);
#时间:204161 ps迭代次数:2实例:/ testbench / FC_INST_1 / \ mgt_gig / GT11_1XFC_2_INST \“
解决/修复方法
这些定时误差是由于GT11在上电后不久在RXRECCLK输出上输出了不可思议的高频率。可以安全地忽略错误。
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