求翻译:..\USER\hw_config.c(28): warning: #177-D: variable "USART_InitStructure" was declared but never referenced是什么意思?待解决 悬赏分:1 - 离问题结束还有 ..\USER\hw_config.c(28): warning: #177-D: variable "USART_InitStructure" was declared but never referenced问题补充:匿名 2013-...