本人单片机小白，在尝试做飞控的途中遇到了一些问题
先看图
目前遇到的问题是ch340G可以与电脑通讯，但尝试写入程序时报错，错误如下
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0xde
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 2 of 10: not in sync: resp=0xde
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 3 of 10: not in sync: resp=0xde
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 4 of 10: not in sync: resp=0xde
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 5 of 10: not in sync: resp=0xde
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 6 of 10: not in sync: resp=0xde
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 7 of 10: not in sync: resp=0xde
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 8 of 10: not in sync: resp=0xde
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 9 of 10: not in sync: resp=0xde
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 10 of 10: not in sync: resp=0xde
请教一下各位大佬问题出在哪里，谢谢！
ps：pcb确实画的有一些问题，如没有正确差分走线，布线太乱等问题，如果有我没有发现的，也请大家发表高见，谢谢
又到了日经的远程分布式云debug环节。芯片没有去耦电容其一，企图用7805把usb进来的5v又稳压成5V其二，正3V稳压器用的居然是7903其三，晶体和它的负载电容之间更是隔了十万八千里其四。显然你的整个板子上只有ch340一个直接接上usb就能动的东西在正常工作。
我建议单纯火箭爱好者直接买成品开源飞控就行了，要求每个对火箭感兴趣的人都得先学会电路设计程序设计嵌入式设计pcblayout显然不现实。
你想知道晶振有没有起振，串口波形正常否，你至少得有个示波器吧，买个示波器能买5个成品飞控了。
200字以内，仅用于支线交流，主线讨论请采用回复功能。