Quartus Error (10028): Can‘t resolve multiple constant drivers for net XX

最新推荐文章于 2024-08-21 20:10:42 发布
原创 最新推荐文章于 2024-08-21 20:10:42 发布 · 3.2k 阅读 · 4 ·
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#verilog

博客围绕Verilog编程展开，指出编写时出现无法解析网络的多个常量驱动程序问题。经分析，是多个always对同一寄存器赋值致信号冲突。通过查看代码和论坛确认问题，解决方案是将原在多个always里赋值的寄存器放于同一个always操作。

问题描述：

在编写Verilog的时候出现了如上的问题

原因分析：

英文翻译过来就是：

无法解析网络的多个常量驱动程序

那么猜测应该是在多个always对同一个寄存器进行了赋值操作，导致信号冲突了，查看了代码后确实也发现了有这个问题

同时为了确定自己的想法没错，查找了论坛，大佬给出的解释如下，十分生动形象
在这里插入图片描述

解决方案：

把原来在多个always里的进行赋值的寄存器放到同一个always进行操作

quartusII综合报错（Error (10028): Can't resolve multiple constant drivers for net "txd_cnt[3]"）
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出现这个错误的原因在于，在不同的always逻辑块中，对同一个reg变量进行了赋值。 在多个alwasy逻辑块同时并行工作的时候，会出现冲突。解决的办法就是，对于一个变量，只在一个always块中，进行赋值。 例如我的代码中，分别有2个always块，内部分别对同一个变量进行的赋值smp_cnt,txd_cnt,txd_state; 在另外一个always中同样赋值 在不同
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我注释的变量cnt_full 在另一个always语句块中也在赋值，FPGA中是同时进行的，所以会报错。学按键+状态机的代码的时候遇到的原因就是重复给变量赋值了。
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Error (10028): Can't resolve multiple constant drivers for net "cnt[19]" at key.v(95) 出现这个错误的原因在于，在不同的always逻辑块中，对同一个reg变量进行了赋值。 在多个alwasy逻辑块同时并行工作的时候，会出现冲突。解决的办法就是，对于一个变量，只在一个always块中，进行赋值。 例如我的代码...
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翻译成中文是：无法解析 SEND.v（284） 上连接“up_data[63]”的多个常量驱动程序。(这里是单独给up_data定义的，所以上面那部分代码中定义的up_data与这里冲突)通过上网查询发现是因为在不同always逻辑块中对同一个变量进行了赋值而产生了冲突。解决方法：删除第一段中对up_data的定义即可。
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