利用單片機(jī)與嵌入式GPU進(jìn)行充分顯示為基礎(chǔ)的用戶界面

　　各種類型的嵌入式系統(tǒng)正變得越來越緊密，以數(shù)據(jù)為中心，最終用戶期望高分辨率、全彩色顯示圖形、指示器，甚至分析。簡單的旋鈕和用戶界面撥號的日子正在迅速消失。

　　對于負(fù)責(zé)使復(fù)雜的嵌入式系統(tǒng)為終端用戶提供簡單和直觀的同時又使其美觀的任務(wù)的設(shè)計者來說，許多后端設(shè)計問題和權(quán)衡需要仔細(xì)考慮。以決議為例。

　　高分辨率轉(zhuǎn)換為更高的功耗，通常應(yīng)該是低功耗系統(tǒng)。隨著功耗最小化，設(shè)計者需要在空間、成本和時間上考慮市場問題，同時也要選擇最佳屏幕技術(shù)并相應(yīng)地配置其系統(tǒng)。

　　在許多情況下，嵌入式工程師沒有使用LCD屏幕的經(jīng)驗，也很少有嵌入式程序員設(shè)計了圖形用戶界面（GUI）。那么，這些開發(fā)人員應(yīng)該如何在經(jīng)常緊張的時間、預(yù)算和空間限制的情況下實現(xiàn)產(chǎn)品的現(xiàn)代化呢？

　　Stacking the human machine GUI problems

　　To the end user， a graphical interface should be intuitive. For its developers， it’s anything but that. Attractive and usable interfaces can be remarkably difficult to design， calibrate， and deploy in the field. Quite apart from the sometimes non-intuitive hardware problems， there’s the issue of designing the graphical aspect of the interface itself. How should data be presented？ How big should the indicators be？ Is the display equally visible in bright daylight and dim conditions？ Should the display update rapidly， or should it present static content that the user can easily find？ Should real-time information be presented as a “virtual gauge” or dial， or is it better presented as numbers， bar graphs， or colors？ All these design decisions – and many more – quickly present themselves to often stressed and inexperienced developers and their team.