AVR笔记2：定义F_CPU
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2.warning: "F_CPU" redefined
本文引用地址：https://www.eepw.com.cn/article/201611/322364.htm3.c:/winavr-20100110/lib/gcc/../../avr/include/util/delay.h:86:1: warning: this is the location of the previous definition
出现以上三种错误的解决办法是将#define F_CPU 1000000
放在在#include
#define F_CPU 1000000
#include
#include
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