关于“Error: Net "gdfx_temp0", which fans out to "***:inst4|BIN", cannot be assigned more than”错误
2013-10-30 17:13
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有些时候,在FPGA的编程时,用原理图输入,运行“complication”后,会出现这个错误:Error: Net "gdfx_temp0", which fans out to "***:inst4|&&&", cannot be assigned
more than one value。 (其中“***”代表你所设计或者引用的模块名,&&&表示模块名的某个端口)。其实这种情况并不难解决,自己查看下所设计的原理图就很容易发现问题,比如某个端口本来是输出端,而你却接成了输入端(输入输出端口混乱)!当然可能还有其它的一些情形,只要仔细查看原理图一般都能很容易发现。
另外,注意扇出的概念,扇出(fan-out)是一个定义单个逻辑门能够驱动的数字信号输入最大量的专业术语。大多数的TTL逻辑门能够为10个其他数字门或驱动器提供信号。(来源于:百度百科)
more than one value。 (其中“***”代表你所设计或者引用的模块名,&&&表示模块名的某个端口)。其实这种情况并不难解决,自己查看下所设计的原理图就很容易发现问题,比如某个端口本来是输出端,而你却接成了输入端(输入输出端口混乱)!当然可能还有其它的一些情形,只要仔细查看原理图一般都能很容易发现。
另外,注意扇出的概念,扇出(fan-out)是一个定义单个逻辑门能够驱动的数字信号输入最大量的专业术语。大多数的TTL逻辑门能够为10个其他数字门或驱动器提供信号。(来源于:百度百科)
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