atmega32u4 avr-gcc (WinAVR 2010) 編譯 啓動代碼 crtm32u4.o

研究是基於： SparkFun ATMEGA32U4 Breakout https://github.com/sparkfun/32U4_Breakout_Board 32U4_Breakout_Board-master\Examples\32U4_digital_input 源碼爲： main.cgit /* Created 05/22/2012 by Jordan McConnell at S

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