PI & TTL

最近一直使用 TTL 的方式來控制PI

可是前一陣子的時候發現, 螢幕上有看到畫面, 可是輸入指令完全沒有反應. 囧!!!!!

然後看到這邊
https://www.raspberrypi.org/forums/viewtopic.php?f=28&t=79573

There's a similar-sounding problem here where it turns out the problem was actually a physically damaged RX pin on the Pi.

該不會真的GG吧, pin腳出問題.... QAQ

後來在這邊看到
https://www.raspberrypi.org/forums/viewtopic.php?f=29&t=79512

The most likely is you haven't connected the Pi's RXD to the dongles TX pin, or you haven't connected the grounds.

然後再檢查一下pin腳.......
還真的有一個pin腳鬆脫了  ˊ______>ˋ

默默的把線接回去, 就恢復正常了 orz

看樣子以後遇到這種情形要先檢查線有沒有接好 XD