刚上手，就碰到这个问题。用的是例程

项目使用了 928 字节，占用了 (2%) 程序存储空间。最大为 32256 字节。
全局变量使用了9字节，(0%)的动态内存，余留2039字节局部变量。最大为2048字节。
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0x90
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 2 of 10: not in sync: resp=0x90
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 3 of 10: not in sync: resp=0x90
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 4 of 10: not in sync: resp=0x90
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 5 of 10: not in sync: resp=0x90
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 6 of 10: not in sync: resp=0x90
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 7 of 10: not in sync: resp=0x90
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 8 of 10: not in sync: resp=0x90
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 9 of 10: not in sync: resp=0x90
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 10 of 10: not in sync: resp=0x90
上传出错。查看http://www.arduino.cc/en/Guide/Troubleshooting#upload 获取建议。

追问。。。。。not in sync: resp=0x90是什么意思？？

gxd088 发表于 2017-9-23 23:37
追问。。。。。not in sync: resp=0x90是什么意思？？

意思是不同步:resp = 0 x90

板子没接好，或者电脑USB有问题，另外确认下COM口选对了没