【正文】 ............................................................21． 2． 2 國內乒乓球發(fā)球機的研究現狀 .............................................................................................4 本課題研究內容與設計步驟 ..............................................................................................................5 本課題研究內容 ...........................................................................................................................5 本課題設計步驟 ...........................................................................................................................6第 2 章 乒乓球發(fā)球機控制器設計分析 ........................................................................................................8 乒乓球發(fā)球機的結構及電動機選擇 ...................................................................................................8 主控單片機的選型 ...............................................................................................................................9 單片機的主要特性 .......................................................................................................................9 液晶顯示芯片的選擇 .........................................................................................................................10 LCD12864 引腳說明 ..................................................................................................................11 LCD12864 工作時序 ..................................................................................................................12 驅動芯片的選擇 .................................................................................................................................13 L298N 引腳說明 .........................................................................................................................13 步進電機的調速方法 .........................................................................................................................15 步進電動機概述 .........................................................................................................................15 步進電動機的調速 .....................................................................................................................15 直流電動機的調速方法 .....................................................................................................................15 直流電動機概述 .........................................................................................................................15 直流電動機的調速 .....................................................................................................................16第 3 章 乒乓球發(fā)球機控制器硬件設計 ......................................................................................................17 總體設計 .............................................................................................................................................18 單片機的最小系統 .............................................................................................................................18 驅動電路模塊 .....................................................................................................................................19 按鍵電路模塊 .....................................................................................................................................20 LCD 液晶顯示電路模塊 ....................................................................................................................20第 4 章 乒乓球發(fā)球機控制器軟件設計 ......................................................................................................21 系統軟件設計概述 ............................................................................................................................21 軟件程序編寫的原則 ................................................................................................................21 程序設計方法 ............................................................................................................................22 軟件設計步驟 ............................................................................................................................23 編譯軟件介紹 ....................................................................................................................................234 系統各部分流程圖 .............................................................................................................................24 主程序流程 ................................................................................................................................24 LCD12864 流程 ..........................................................................................................................25 按鍵流程 ....................................................................................................................................27 電機驅動流程 ............................................................................................................................29 直流電機驅動流程 ..............................................................................................................................30 步進電機驅動流程 ..............................................................................................................................31第 5 章 系統調試 ..........................................................................................................................................32 硬件調試 ............................................................................................................................................32 硬件靜態(tài)調試 ............................................................................................................................32 硬件動態(tài)調試 ............................................................................................................................33 軟件調試 ............................................................................................................................................33 聯機調試 ....................................................................