模仿江协视频入门，写led闪烁代码，明明是一步一步照着来的，还是报错了。唉
错误①Start/core_cm3.c(445): error: non-ASM statement in naked function is not supported
错误②Start/core_cm3.c(465): error: parameter references not allowed in naked functions
错误③Start/core_cm3.c(479): error: non-ASM statement in naked function is not supported
错误④Start/core_cm3.c(499): error: parameter references not allowed in naked functions
怎么解决啊 ，可有偿
