如果多次不能燒寫，可以重新插一下USBASP線。
[octopus@pc3 7SegDisp]$ make run
sudo avrdude -p m16 -c usbasp -e -U flash:w:main.hex

avrdude: warning: cannot set sck period. please check for usbasp firmware update.
avrdude: error: programm enable: target doesn't answer. 1
avrdude: initialization failed, rc=-1
         Double check connections and try again, or use -F to override
         this check.


avrdude done.  Thank you.

Makefile:8: recipe for target 'run' failed
make: *** [run] Error 1

參閱：https://zh.arslanbar.net/post.php?t=22539

另外，Windows下的WinAVR也是用的avrdude 和 gcc-avr。所以在網上查資料的時候，可以直接用WinAVR關鍵詞。