Qu artu s 常见错误分析 Error Warning: VHDL Process Statement warning at random.vhd(18): signal reset is in statement, but is not in sensitivity list ----没把singal放到process（）中 2 Warning: Found pins ing as undefined clocks and/or memory enables Info: Assuming node CLK is an undefined clock -=-----可能是说设计中产生的触发器没有使能端 3 Error: VHDL Interface Declaration error in clk_gen.vhd(29): interface object "clk_scan" of mode out cannot be read. Change object mode to buffer or inout. ------信号类型设置不对，out当作 buffer来定义 4 Error: Node instance "clk_gen1" instantiates undefined entity "clk_gen" -------引用的例化元件未定义实体－－entity "clk_gen" 5 Warning: Found 2 node(s) in clock paths which may be acting as ripple and/or gated clocks -- node(s) analyzed as buffer(s) resulting in clock skew Info: Detected ripple clock "clk_gen:clk_gen1|clk_incr" as buffer Info: Detected ripple clock "clk_gen:clk_gen1|clk_scan" as buffer 6 Warning: VHDL Process Statement warning at ledmux.vhd(15): signal or variable "dataout" may not be assigned a new in every possible path through the Process Statement. Signal or variable "dataout" holds its previous in every path with no new assignment, which may create a combinational loop in the current design. 7 Warning: VHDL Process Statement warning at divider_10.vhd(17): signal "cnt" is read inside the Process Statement but isn't in the Process Statement's sensivitity list -----缺少敏感信号 8 Warning: No clock transition on "counter_bcd7:counter_counter_clk|q_sig[3]" register 9 Warning: Reduced register "counter_bcd7:counter_counter_clk|q_sig[3]" with stuck clock port to stuck GND 10 Warning: Circuit may not operate. Detected 1 non-operational path(s) clocked by clock "class[1]" with clock skew la...
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