【正文】 前 言 ...................................................................................................................... 1 第一章 緒論 ............................................................................................................... 2 課題背景 .....................................................................................................................................2 數(shù)控直流電流源概述 .................................................................................................................2 電流源簡介 ..........................................................................................................................2 數(shù)控直流電流源的必要性 ..................................................................................................2 數(shù)控直流電流源簡介 ..........................................................................................................3 課題進展 .....................................................................................................................................3 后話 .............................................................................................................................................3 第二章 芯片簡介 ....................................................................................................... 4 單片機芯片 MSP430F2274........................................................................................................4 D/A 芯片 TLC5615 ....................................................................................................................5 TLC5615 功能簡介 ............................................................................................................6 TLC5615 工作原理 ............................................................................................................7 ZLG7289A 芯片介紹 .................................................................................................................8 芯片簡介 ..............................................................................................................................8 引腳說明 ..............................................................................................................................8 第三章 系統(tǒng)硬件設(shè)計 .............................................................................................. 10 總體方案設(shè)計與比較 ...............................................................................................................10 單元電路 設(shè)計 ..........................................................................................................................11 電源電路 ...........................................................................................................................11 D/A 電路 .............................................................................................................................12 恒流源電路 .......................................................................................................................12 數(shù)碼管顯示電路 ...............................................................................................................14 PROTEL 99SE 介紹 .................................................................................................................15 第四章 系統(tǒng)軟件設(shè)計 .............................................................................................. 17 程序語言介紹 ...........................................................................................................................17 機器語言 ............................................................................................................................17 匯編語言 ............................................................................................................................17 II 高級語言 ............................................................................................................................17 PID 算法介紹 ............................................................................................................................18 PID 增量式算法 .................................................................................................................18 PID 位置算法 .....................................................................................................................19 微分先行 PID 算法 ............................................................................................................20 C 語言程序設(shè)計流程 ...............................................................................................................20 MSP430F2274 編程基礎(chǔ)簡介 ..................................................................................................21 數(shù)據(jù)存儲器和程序存儲器地址空間 ................................................................................21 MSP430F2274 寄存器介紹 ...............................................................................................21 單片機的工作模式 ............................................................................................................23 程序流程圖 ...............................................................................................................................23 主程序流程圖 ....................................................................................................................24 中文液晶顯示 ....................................................................................................................24 鍵盤程序流程圖 ................................................................................................................25 A/D 轉(zhuǎn)換流程圖 ................................................................................................................26 D/A 轉(zhuǎn)換流程圖 ................................................................................................................26 本章小結(jié) .........................................................................................................................