..\FreeRTOS\portable\RVDS\ARM_CM4F\port.c(713): error: #20: identifier "SystemCoreClock" is undefined

这个错误表明在文件..\FreeRTOS\portable\RVDS\ARM_CM4F\port.c的第713行，使用了一个未定义的标识符"SystemCoreClock"。这个错误可能是由于没有正确定义"SystemCoreClock"引起的。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
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