Hi, I am building a custom RFNoC block on USRP X310. When I was trying to build bitstream, after almost two hours processing, it gave me the error as below.
Do you have any idea what timing constraints are? Is that because the custom IP is too large for FPGA? Thank you! It started after [01:58:36] Executing Tcl: write_bitstream -force /home/xxxxx/uhd/fpga/usrp3/top/x300/build-X310_HG/x300.bit [01:58:36] Starting Write Bitstream Command ... (omit same CRITICAL WARNING) CRITICAL WARNING: [Timing 38-469] The REFCLK pin of IDELAYCTRL u_ddr3_32bit/u_ddr3_32bit_mig/u_iodelay_ctrl/u_idelayctrl_200 has a clock period of 4.998 ns (frequency 200.080 Mhz) but IDELAYE2 u_ddr3_32bit/u_ddr3_32bit_mig/u_memc_ui_top_axi/mem_intfc0/ddr_phy_top0/u_ddr_mc_phy_wrapper/u_ddr_mc_phy/ddr_phy_4lanes_0.u_ddr_phy_4lanes/ddr_byte_lane_C.ddr_byte_lane_C/ddr_byte_group_io/input_[7].iserdes_dq_.idelay_dq.idelaye2 has REFCLK_FREQUENCY of 200.000 Mhz (period 5.000 ns). The IDELAYCTRL REFCLK pin frequency must match the IDELAYE2 REFCLK_FREQUENCY property. CRITICAL WARNING: [Timing 38-469] The REFCLK pin of IDELAYCTRL u_ddr3_32bit/u_ddr3_32bit_mig/u_iodelay_ctrl/u_idelayctrl_200 has a clock period of 4.998 ns (frequency 200.080 Mhz) but IDELAYE2 u_ddr3_32bit/u_ddr3_32bit_mig/u_memc_ui_top_axi/mem_intfc0/ddr_phy_top0/u_ddr_mc_phy_wrapper/u_ddr_mc_phy/ddr_phy_4lanes_0.u_ddr_phy_4lanes/ddr_byte_lane_C.ddr_byte_lane_C/ddr_byte_group_io/input_[8].iserdes_dq_.idelay_dq.idelaye2 has REFCLK_FREQUENCY of 200.000 Mhz (period 5.000 ns). The IDELAYCTRL REFCLK pin frequency must match the IDELAYE2 REFCLK_FREQUENCY property. ERROR: [Builder 0-0] The design did not satisfy timing constraints. (Implementation outputs were still generated) ERROR: [Common 17-39] 'send_msg_id' failed due to earlier errors. [02:00:08] Current task: Write Bitstream +++ Current Phase: Starting [02:00:08] Current task: Write Bitstream +++ Current Phase: Finished [02:00:08] Process terminated. Status: Failure ======================================================== Warnings: 1121 Critical Warnings: 113 Errors: 2 make[5]: *** [Makefile.x300.inc:127: bin] Error 1 make[4]: *** [Makefile:85: X310_HG] Error 2
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