QUARTUS 7常见错误剖析
Quartus12007Top-leveldesignentityisundefined异常原因
Quartus12007Top-leveldesignentityisundefined异常原因好久没有⽤FPGA了，最近重新使⽤FPGA练习下数字电源。
可第⼀个Bug就花了我1个⼩时，惭愧ing。
为了以后⾃⼰能长个记性，也为了帮助学弟学妹们少⾛弯路。
因此，将这个问题记录下来。
过程：
使⽤Quattus 软件，⾃⼰建⽴⼯程并导⼊别家开发板例程的Led.V⽂件。
现象：
⾸次编译，出现下⾯的错误提⽰，添加该⽂件后再次编译，仍然报错。
可能原因：
1、没有定义Led.v⽂件
2、⼯程⾥⾯包含了Led.v⽂件。
但是，该⽂件的模块名不是⽂件名。
反思：
我检查了好⼏次，明明建的⼯程⽂件⾥⾯包含了“Led.v”⽂件，可实际编译还是这个错误提⽰。
最后检查了好久，才发现是导⼊的其他家的例程，模块名与⽂件名对不上。
这可能是与C语⾔编程的差异吧，C语⾔报错undefined，在⽂件⾥⾯定义⼀个头⽂件或者函数名就解决这个现象了。
Quartus使用问题及解决方法总结
Quartus使用问题及解决方法总结（转载）在QuartusII下进行编译和仿真的时候,会出现一堆warning,有的可以忽略,有的却需要注意,虽然按F1可以了解关于该警告的帮助,但有时候帮助解释的仍然不清楚,大家群策群力,把自己知道和了解的一些关于警告的问题都说出来讨论一下,免得后来的人走弯路.下面是我收集整理的一些,有些是自己的经验,有些是网友的,希望能给大家一点帮助,如有不对的地方,请指正,如果觉得好,请版主给点威望吧,谢谢1.Found clock-sensitive change during active clock edge at time <time> on register "<name>"原因：vector source file中时钟敏感信号（如：数据，允许端，清零，同步加载等）在时钟的边缘同时变化。
而时钟敏感信号是不能在时钟边沿变化的。
其后果为导致结果不正确。
措施：编辑vector source file2.Verilog HDL assignment warning at <location>: truncated value with size <number> to match size of target (<number>原因:在HDL设计中对目标的位数进行了设定,如:reg[4:0] a;而默认为32位,将位数裁定到合适的大小措施:如果结果正确,无须加以修正,如果不想看到这个警告,可以改变设定的位数3.All reachable assignments to data_out(10) assign '0', register removed by optimization原因:经过综合器优化后，输出端口已经不起作用了4.Following 9 pins have nothing, GND, or VCC driving datain port -- changes to this connectivity may change fitting results原因:第9脚，空或接地或接上了电源措施:有时候定义了输出端口，但输出端直接赋‘0’，便会被接地，赋‘1’接电源。
Quartus常见错误警告分析
Quartus常见错误警告分析Quartus常见错误分析ErrorWarning: 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 enablesInfo: 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 outcannot 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 skewInfo: Detected ripple clock "clk_gen:clk_gen1|clk_incr" as bufferInfo: Detected ripple clock "clk_gen:clk_gen1|clk_scan" as buffer6 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" holdsits previous in every path with no new assignment, whichmay create a combinational loop in the currentdesign.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]" register9 Warning: Reduced register "counter_bcd7:counter_counter_clk|q_sig[3]" with stuck clock port to stuckGND10 Warning: Circuit may not operate. Detected 1 non-operational path(s) clocked by clock "class[1]" withclock skew larger than data delay. See Compilation Report for details.11 Warning: Circuit may not operate. Detected 1 non-operational path(s) clocked by clock "sign" withclock skew larger than data delay. See Compilation Report for details.12 Error: VHDL error at counter_clk.vhd(90): actual port "class" of mode "in" cannot be associated withformal port "class" of mode "out"------两者不能连接起来13 Warning: Ignored node in vector source file. Can't find corresponding node name"class_sig[2]" indesign.------没有编写testbench文件，或者没有编辑输入变量的值testbench里是元件申明和映射14 Error: VHDL Binding Indication error at freqdetect_top.vhd(19): port "class" in design entity does not have std_logic_vector type that is specified for the same generic in the associated component ---在相关的元件里没有当前文件所定义的类型15 Error: VHDL error at tongbu.vhd(16): can't infer register for signal "gate" because signal does nothold its outside clock edge16 Warning: Found clock high time violation at 1000.0 ns on register"|fcounter|lpm_counter:temp_rtl_0|dffs[4]"17 Warning: Compiler packed, optimized or synthesized away node "temp[19]". Ignored vector source filenode.---"temp[19]"被优化掉了18 Warning: Reduced register "gate~reg0" with stuck data_in port to stuck GND19 Warning: Design contains 2 input pin(s) that do not drive logicWarning: No output dependent on input pin "clk"Warning: No output dependent on input pin "sign"------输出信号与输入信号无关，20 Warning: Found clock high time violation at 16625.0 ns on register "|impulcomp|gate1"21 Error: VHDL error at impulcomp.vhd(19): can't implement clock enable condition specified using binaryoperator "or"22 Error: VHDL Association List error at period_counter.vhd(38): actual parameter assigned to formal parameter "alarm", but formal parameter is not declared-------连接表错误，形参"alarm"赋值给实参，形参没定义，可能是形参与实参的位置颠倒了，规定形参在实参之前。
Quartus常见问题
Quartus常见错误1.Error (10028): Can't resolve multiple constant drivers for net ……解析：不能在两个以上always内对同一变量赋值，这个细节一般看书看资料会看到，但是编程时，就是没想到。
2.Error (10158): Verilog HDL Module Declaration error at clkseg.v(1): port"XXXX" is not declared as port解析：大意了，端口类型还没定义啊！3.Error (10110): variable "en" has mixed blocking and nonblocking ProceduralAssignments -- must be all blocking or all nonblocking assignments解析:en在程序中有时用非阻塞赋值，有时用阻塞赋值，这是禁止的。
在初学的时候，可能分得不是很清楚，所以在检查时，一定要一步步观察慢慢来。
4.Error (10161): Verilog HDL error at clkseg.v(36): object "count" is notdeclared解析：这个错误应该很明显啦，只要能读得懂。
5．Error (10170): Verilog HDL syntax error at clkseg.v(37) near text "***";expecting ";"解析：意思应该也很简单，就是检查的时候要细心点。
6.Error (10171): Verilog HDL syntax error at ir_ctrl.v(149) near end of file ;expecting an identifier, or "endmodule", or a parallel statement解析：最后上了endmodule。
自己整理的：学习verilogDHL问题笔记——Quartus常见错误
⾃⼰整理的：学习verilogDHL问题笔记——Quartus常见错误我初学verilog语⾔，很多细节都没注意，按着⾃⼰的思想就写了，编译的时候才发现各种问题。
这些都是我在学习中遇到的问题，还是很常见的。
1.Error (10028): Can't resolve multiple constant drivers for net ……解析：不能在两个以上always内对同⼀变量赋值，这个细节⼀般看书看资料会看到，但是编程时，就是没想到。
2.Error (10158): Verilog HDL Module Declaration error at clkseg.v(1): port "XXXX" is not declared as port解析：⼤意了，端⼝类型还没定义啊！3.Error (10110): variable "en" has mixed blocking and nonblocking Procedural Assignments -- must be all blocking or all nonblocking assignments解析:en在程序中有时⽤⾮阻塞赋值，有时⽤阻塞赋值，这是禁⽌的。
在初学的时候，可能分得不是很清楚，所以在检查时，⼀定要⼀步步观察慢慢来。
4.Error (10161): Verilog HDL error at clkseg.v(36): object "count" is not declared解析：这个错误应该很明显啦，只要能读得懂。
5.Error (10170): Verilog HDL syntax error at clkseg.v(37) near text "***"; expecting ";"解析：意思应该也很简单，就是检查的时候要细⼼点。
Quartus错误大全
Quartus常见错误分析1 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 skewInfo: Detected ripple clock "clk_gen:clk_gen1/clk_incr" as buffer Info: Detected ripple clock "clk_gen:clk_gen1/clk_scan" as buffer6 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]" register9 Warning: Reduced register "counter_bcd7:counter_counter_clk/q_sig[3]" with stuck clock port to stuck GND10 Warning: Circuit may not operate. Detected 1 non-operational path(s) clocked by clock "class[1]" with clock skew larger than data delay. See Compilation Report for details.11 Warning: Circuit may not operate. Detected 1 non-operational path(s) clocked by clock "sign" with clock skew larger than data delay. See Compilation Report for details.12 Error: VHDL error at counter_clk.vhd(90): actual port "class" of mode "in" cannot be associated with formal port "class" of mode "out"------两者不能连接起来13 Warning: Ignored node in vector source file. Can''t find corresponding node name "class_sig[2]" in design.------没有编写testbench文件，或者没有编辑输入变量的值 testbench里是元件申明和映射14 Error: VHDL Binding Indication error at freqdetect_top.vhd(19): port "class" in design entity does not have std_logic_vector type that is specified for the same generic in the associated component---在相关的元件里没有当前文件所定义的类型15 Error: VHDL error at tongbu.vhd(16): can''t infer register for signal "gate" because signal does not hold its outside clock edge16 Warning: Found clock high time violation at 1000.0 ns on register "/fcounter/lpm_counter:temp_rtl_0/dffs[4]"17 Warning: Compiler packed, optimized or synthesized away node "temp[19]". Ignored vector source file node.---"temp[19]"被优化掉了18 Warning: Reduced register "gate~reg0" with stuck data_in port to stuck GND19 Warning: Design contains 2 input pin(s) that do not drive logic Warning: No output dependent on input pin "clk"Warning: No output dependent on input pin "sign"------输出信号与输入信号无关，20 Warning: Found clock high time violation at 16625.0 ns on register "/impulcomp/gate1"21 Error: VHDL error at impulcomp.vhd(19): can''t implement clock enable condition specified using binary operator "or"22 Error: VHDL Association List error at period_counter.vhd(38): actual parameter assigned to formal parameter "alarm", but formal parameter is not declared-------连接表错误，形参"alarm"赋值给实参，形参没定义，可能是形参与实参的位置颠倒了，规定形参在实参之前。
Quartus常见警告分析
Quartus常见警告分析1.Found clock-sensitive change during active clock edge at time<time> on register "<name>"原因：vector source file中时钟敏感信号（如：数据，允许端，清零，同步加载等）在时钟的边缘同时变化。
而时钟敏感信号是不能在时钟边沿变化的。
其后果为导致结果不正确。
措施：编辑vector source file2.Verilog HDL assignment warning at <location>: truncatedwith size <number> to match size of target (<number>原因:在HDL设计中对目标的位数进行了设定,如:reg[4:0] a;而默认为32位,将位数裁定到合适的大小措施:如果结果正确,无须加以修正,如果不想看到这个警告,可以改变设定的位数3.All reachable assignments to data_out(10) assign '0', registerremoved by optimization原因:经过综合器优化后，输出端口已经不起作用了4.Following 9 pins have nothing, GND, or VCC driving datain port --changes to this connectivity may change fitting results原因:第9脚，空或接地或接上了电源措施:有时候定义了输出端口，但输出端直接赋‘0’，便会被接地，赋‘1’接电源。
如果你的设计中这些端口就是这样用的，那便可以不理会这些warning5.Found pins ing as undefined clocks and/or memory enables原因:是你作为时钟的PIN没有约束信息。
Quartus常见问题分析
Quartus常见问题分析QuartusQuartus常见问题分析转一个，刚刚学确实会遇到不少的问题，郁闷呀。
1 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 skewInfo: Detected ripple clock "clk_gen:clk_gen1|clk_incr" as buffer Info: Detected ripple clock "clk_gen:clk_gen1|clk_scan" as buffer6 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]" register9 Warning: Reduced register "counter_bcd7:counter_counter_clk|q_sig[3]" with stuck clock port to stuck GND10 Warning: Circuit may not operate. Detected 1 non-operational path(s)clocked by clock "class[1]" with clock skew larger than data delay. See Compilation Report for details.11 Warning: Circuit may not operate. Detected 1 non-operational path(s) clocked by clock "sign" with clock skew larger than data delay. See Compilation Report for details.12 Error: VHDL error at counter_clk.vhd(90): actual port "class" of mode "in" cannot be associated with formal port "class" of mode "out"------两者不能连接起来13 Warning: Ignored node in vector source file. Can't find corresponding node name "class_sig[2]" in design.------没有编写testbench文件，或者没有编辑输入变量的值 testbench里是元件申明和映射14 Error: VHDL Binding Indication error at freqdetect_top.vhd(19): port "class" in design entity does not have std_logic_vector type that is specified for the same generic in the associated component---在相关的元件里没有当前文件所定义的类型15 Error: VHDL error at tongbu.vhd(16): can't infer register for signal "gate" because signal does not hold its outside clock edge16 Warning: Found clock high time violation at 1000.0 ns on register "|fcounter|lpm_counter:temp_rtl_0|dffs[4]"17 Warning: Compiler packed, optimized or synthesized away node "temp[19]". Ignored vector source file node.---"temp[19]"被优化掉了18 Warning: Reduced register "gate~reg0" with stuck data_in port to stuck GND19 Warning: Design contains 2 input pin(s) that do not drive logic Warning: No output dependent on input pin "clk"Warning: No output dependent on input pin "sign"------输出信号与输入信号无关，20 Warning: Found clock high time violation at 16625.0 ns on register "|impulcomp|gate1"21 Error: VHDL error at impulcomp.vhd(19): can't implement clock enable condition specified using binary operator "or"22 Error: VHDL Association List error at period_counter.vhd(38): actual parameter assigned to formal parameter "alarm", but formal parameter is not declared-------连接表错误，形参"alarm"赋值给实参，形参没定义，可能是形参与实参的位置颠倒了，规定形参在实参之前。
Quartus常见错误
Quartus常见错误2009-10-17 17:161.Found clock-sensitive change during active clock edge at time <time> on register "<name>"原因：vector source file中时钟敏感信号（如：数据，允许端，清零，同步加载等）在时钟的边缘同时变化。
而时钟敏感信号是不能在时钟边沿变化的。
其后果为导致结果不正确。
措施：编辑vector source file2.Verilog HDL assignment warning at <location>: truncated with size <number> to match size of target (<number>原因:在HDL设计中对目标的位数进行了设定,如:reg[4:0] a;而默认为32位,将位数裁定到合适的大小措施:如果结果正确,无须加以修正,如果不想看到这个警告,可以改变设定的位数3.All reachable assignments to data_out(10) assign '0', register removed by optimization原因:经过综合器优化后，输出端口已经不起作用了4.Following 9 pins have nothing, GND, or VCC driving datain port -- changes to this connectivity may change fitting results 原因:第9脚，空或接地或接上了电源措施:有时候定义了输出端口，但输出端直接赋‘0’，便会被接地，赋‘1’接电源。
如果你的设计中这些端口就是这样用的，那便可以不理会这些warning5.Found pins ing as undefined clocks and/or memory enables原因:是你作为时钟的PIN没有约束信息。
Quartus常见警告和错误集锦
我们一起爱~主页博客相册个人档案好友查看文章FPGA错误集锦2009-05-07 10:151) QuartusII对代码进行时序仿真时出现Error: Can't continue timing simulation because delay annotation information for design is missing.原因：如果只需要进行功能仿真，不全编译也是可以进行下去的，但时序仿真就必须进行全编译（即工具栏上的紫色实心三角符号那项）。
全仿真包括四个模块：综合器（Synthesis）、电路装配器（Fitter）、组装器（Assember）和时序分析器（Timing Analyzer），任务窗格中会有成功标志（对号）。
2) 在下载运行的时候，出现下面的错误：Warning: The JTAG cable you are using is not supported for Nios II systems.You may experience intermittent JTAG communicationfailures with this cable. Please use a USB Blaster revision B.在运行之前已经将.sof文件下载到开发板上面了，但是依然出现上面的问题。
解决：在配置的时候，在run之后，进行配置，选择target connection，在最后一项：NIOS II Terminal Communication Device中，要选择none（不要是Jtag_uart）如果采用USB Blaster，可以选择Jtag_uart。
之后再run就ok了！3）Error: Can't compile duplicate declarations of entity "count3" into library "work"此错误一般是原理图文件的名字和图中一个器件的名字重复所致，所以更改原理图文件的名字保存即可。
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QUARTUS II常见错误剖析
made by lingfeng
1，Error (10053): Verilog HDL error at ADDBCD.v(13): can't index object "out" with zero packed or unpacked array dimensions
这个错误是由于OUT是个寄存器变量，在程序的开始忘记定义reg out 或者out寄存器变量的宽度定义错误。
2，编写好程序并进行编译后，把文件作为顶层文件然后进行波形仿真，出现对应引脚与程序中的引脚不符。
这个错误是因为把文件作为顶层文件后还要再编译一次，顶层文件才能够进行波形仿真。
否则仿真对应的文件永远是上一个顶层文件。
3，在给寄存器赋初值时，应该通过在进程中设置一个复位的单元来给寄存器变量赋初值。
4，项目导航窗口被关闭了，怎样重新打开？
点击主菜单的VIEW->utility windows->project navigator(工程文件) and status(编译状态)
5，Error: Can't elaborate top-level user hierarchy
解决办法：看看Always中的敏感表达式是否与之后的程序相矛盾。
6，Error: Can't compile duplicate declarations of entity "class_design" into library "work"
解决办法：把文件名修改成和别的文件不重复的名字。
7，Error (10219): Verilog HDL Continuous Assignment error at adder.v(9): object "cout" on left-hand side of assignment must have a net type
错误原因：变量的定义类型错误。
8，Error (10228): Verilog HDL error at adder.v(1): module "adder" cannot be declared more than once
错误原因：`include包含的文件与`include所在的文件在同一个文件夹下。
9，装QUARTUS 后需要破解，使用破解器破解.DLL文件时，出现无法找到.DLL文件或者.DLL文件不存在的错误。
解决办法:检查QUARTUS 软件是否关闭，如果未关闭，把软件关闭后再破解。
10，装USB_blaster 驱动时，选择更新驱动quartus\dirver\USB_blaster 如果已经装好了驱动，但是软件无法识别。
这是由于所装的驱动与软件的版本号不符，需要先把原来的驱动卸载，再重新装上软件包里的驱动程序。