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map通过了,布线怎么也通过不了。报了如下ERROR:
ERROR:Route:471 - This design is unrouteable. Router will not continue. To evaluate the problem please use fpga_editor. The nets listed below can not be routed:
Unrouteable Net:ddr_io_interface/ddr_oserdes/dq_ts_byte<5>
Unrouteable Net:ddr_io_interface/ddr_oserdes/dq_ts_byte<3>
Unrouteable Net:ddr_io_interface/ddr_oserdes/dq_ts_byte<6>
Unrouteable Net:ddr_io_interface/ddr_oserdes/dq_ts_byte<7>
Unrouteable Net:ddr_io_interface/ddr_oserdes/dq_ts_byte<1>
Unrouteable Net:ddr_io_interface/ddr_oserdes/dq_ts_byte<4>
Unrouteable Net:ddr_io_interface/ddr_oserdes/dq_ts_byte<2>
Unrouteable Net:ddr_io_interface/ddr_oserdes/dq_ts_byte<0>
时序约束也没通过,奇怪的是setup time没有违例,hold time有违例,报告如下。不明白的是,data path delay为啥是负的??简直不能理解!以及违例好像出现在BRAM内部,更加不知道如何处理了。恳求大牛们指教啊,万分感谢!!
Paths for end point ddr_cmd_top/BRAM_8192x512b_inst/U0/xst_blk_mem_generator/gnativebmg.native_blk_mem_gen/valid.cstr/ramloop[38].ram.r/v6_noinit.ram/NO_BMM_INFO.SDP.SIMPLE_PRIM36.ram (RAMB36_X11Y22.DIPADIP1), 1 path
--------------------------------------------------------------------------------
Slack (hold path): -0.153ns (requirement - (clock path skew + uncertainty - data path))
Source: ddr_cmd_top/ddr_write/dq_reg_7_370 (FF)
Destination: ddr_cmd_top/BRAM_8192x512b_inst/U0/xst_blk_mem_generator/gnativebmg.native_blk_mem_gen/valid.cstr/ramloop[38].ram.r/v6_noinit.ram/NO_BMM_INFO.SDP.SIMPLE_PRIM36.ram (RAM)
Requirement: 0.000ns
Data Path Delay: -0.153ns (Levels of Logic = 0)
Clock Path Skew: 0.000ns
Source Clock: iclkdiv rising at 6.875ns
Destination Clock: iclkdiv rising at 6.875ns
Clock Uncertainty: 0.000ns
Minimum Data Path at Slow Process Corner: ddr_cmd_top/ddr_write/dq_reg_7_370 to ddr_cmd_top/BRAM_8192x512b_inst/U0/xst_blk_mem_generator/gnativebmg.native_blk_mem_gen/valid.cstr/ramloop[38].ram.r/v6_noinit.ram/NO_BMM_INFO.SDP.SIMPLE_PRIM36.ram
Location Delay type Delay(ns) Physical Resource
Logical Resource(s)
----------------------------------------------------- -------------------
SLICE_X180Y112.CQ Tcko 0.178 ddr_cmd_top/ddr_write/dq_reg_7<371>
ddr_cmd_top/ddr_write/dq_reg_7_370
RAMB36_X11Y22.DIPADIP1 net (fanout=4) e 0.196 ddr_cmd_top/ddr_write/dq_reg_7<370>
RAMB36_X11Y22.CLKARDCLKU Trckd_DIPA (-Th) 0.527 ddr_cmd_top/BRAM_8192x512b_inst/U0/xst_blk_mem_generator/gnativebmg.native_blk_mem_gen/valid.cstr/ramloop[38].ram.r/v6_noinit.ram/NO_BMM_INFO.SDP.SIMPLE_PRIM36.ram
ddr_cmd_top/BRAM_8192x512b_inst/U0/xst_blk_mem_generator/gnativebmg.native_blk_mem_gen/valid.cstr/ramloop[38].ram.r/v6_noinit.ram/NO_BMM_INFO.SDP.SIMPLE_PRIM36.ram
----------------------------------------------------- ---------------------------
Total -0.153ns (-0.349ns logic, 0.196ns route)
(228.1% logic, -128.1% route) |
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