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encounter preroute timing 分析时报以下错误,说路径没有定义,但是在constraint文件里已经定义了啊
**ERROR: (TA-152): A latency path from the 'Fall' edge of the master clock at source pin 'u_aes_core_top/u_S65NLLPLL_ZP1500/CLK_OUT' to the 'Fall' edge of generated clock 'aes_clk' at pin 'u_aes_core_top/u_divider/aes_mux/Z' cannot be found. You must modify your create_generated_clock constraint to be consistent with the network topology. The analysis will continue using 0ns source latency for generated clock 'aes_clk'. For backward compatibility with earlier releases or to remove the edge-to-edge sufficiency checking, you should set the global 'timing_enable_genclk_edge_based_source_latency' to false
constraint中的定义:
create_generated_clock [get_pins u_aes_core_top/u_divider/aes_mux/Z] -name aes_clk -source [get_pins u_aes_core_top/u_S65NLLPLL_ZP1500/CLK_OUT] -divide_by 1 |
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