用Arduino板學AVR篇程 - USART

Submitted by saladlam on

控制serial port是MCU篇程一個很基本的技巧。而ATmega328P的說明書都寫得幾清楚背後的原理是怎麼樣，但對一個新手來說，由零開始寫始終是一大挑戰。

Peter Fleury寫了一個控制USART的Library，但Code實在太舊。Tim Sharpe修改了由他所寫的Library，令到Library可以用於新出的MCU，並支持現今的AVR-GCC Complier。

我用了這個Library，並作出少許修改，試作serial port通訊。試驗如下:

23092011-0001.jpg
顯示出預定的句字

23092011-0002.jpg
在Keyboard亂打一通，都識feedback，証明程式正常運作

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