【正文】 ............................................................................II1 引言 .........................................................................................................................................1 課題研究背景及意義 ......................................................................................................1 研究現(xiàn)狀 ..........................................................................................................................1 論文主要內(nèi)容和預(yù)期目標(biāo) ..............................................................................................2 論文組織結(jié)構(gòu) ..................................................................................................................22 稱(chēng)重系統(tǒng)總體方案設(shè)計(jì) .........................................................................................................4 稱(chēng)重系統(tǒng)基本工作原理 ..................................................................................................4 稱(chēng)重系統(tǒng)模塊方案設(shè)計(jì) ..................................................................................................4 主控制器模塊方案設(shè)計(jì) ..........................................................................................4 數(shù)據(jù)采集模塊方案設(shè)計(jì) ..........................................................................................4 數(shù)據(jù)顯示模塊方案設(shè)計(jì) ..........................................................................................5 電源管理模塊方案設(shè)計(jì) ..........................................................................................6 設(shè)計(jì)方案總結(jié) ..................................................................................................................63 稱(chēng)重系統(tǒng)硬件設(shè)計(jì) .................................................................................................................7 MSP430 單片機(jī)最小系統(tǒng)設(shè)計(jì) .......................................................................................7 MSP430 單片機(jī)介紹 ...............................................................................................7 MSP430 單片機(jī)接口電路設(shè)計(jì) ...............................................................................8 電源管理模塊設(shè)計(jì) ........................................................................................................11 5V 轉(zhuǎn)換電路 ...........................................................................................................11 轉(zhuǎn)換電路 ........................................................................................................12 信號(hào)采集模塊電路設(shè)計(jì) ................................................................................................12 工作原理 ................................................................................................................12 信號(hào)檢測(cè)電路設(shè)計(jì) ................................................................................................14 信號(hào)調(diào)理電路設(shè)計(jì) ........................................................................................................15 AD620 工作原理 ....................................................................................................15 信號(hào)放大電路 ........................................................................................................16 AD 轉(zhuǎn)換電路設(shè)計(jì) .........................................................................................................16 SD16 概覽 ..............................................................................................................16 轉(zhuǎn)換接口電路設(shè)計(jì) ................................................................................................17 顯示電路設(shè)計(jì) ................................................................................................................17 硬件電路設(shè)計(jì)小結(jié) ........................................................................................................194 稱(chēng)重系統(tǒng)軟件設(shè)計(jì) ...............................................................................................................20 主程序設(shè)計(jì) ....................................................................................................................20 初始化程序模塊 ............................................................................................................21 AD 采集與數(shù)據(jù)處理程序模塊 .....................................................................................22 LCD 顯示程序模塊 .......................................................................................................23 軟件設(shè)計(jì)小結(jié) ................................................................................................................245 調(diào)試與總結(jié) ...........................................................................................................................25 調(diào)試中遇到問(wèn)題及解決方案 ........................................................................................25 結(jié)論 ................................................................................................................................25致謝 ...........................................................................................................................................26參考文獻(xiàn) ...................................................................................................................................27附錄 ?.........................................................................................................................................28附錄 II .......................................................................................................................................29 摘要電子秤是日常生活中常用的電子衡器，智能電子秤測(cè)量準(zhǔn)確、快速，易于實(shí)時(shí)測(cè)量和監(jiān)控，成為測(cè)量領(lǐng)域的主流產(chǎn)品。本設(shè)計(jì)是基于 MSP430 單片機(jī)的稱(chēng)重系統(tǒng)，可實(shí)現(xiàn) 0~500g 重物的精確測(cè)量。系統(tǒng)使用橋式應(yīng)變片傳感器測(cè)量重物并輸出電壓信號(hào)，經(jīng)過(guò)信號(hào)調(diào)理電路放大濾波后，經(jīng)模數(shù)轉(zhuǎn)換將信息傳至單片機(jī)處理，同時(shí)將重量實(shí)時(shí)顯示。文章還詳細(xì)闡述了本次設(shè)計(jì)的調(diào)試過(guò)程以及在調(diào)試過(guò)程中遇到的問(wèn)題及解決方法。關(guān)鍵詞：MSP430 ；稱(chēng)重傳感器；LCD；I AbstractElectronic scale is a electron weighing apparatus used in everyday life, intelligent electronic scales measurement accuracy, fast, easy to realtime measuring and monitoring, bee the mainstream of the fields products.This design is a weighing system based on MSP430 MCU, which can realize the 0 ~ 500g clog precision measurement. The