PIC實驗四用AD轉(zhuǎn)換模塊實現(xiàn)模擬量采集資料

1、1/tsfitnfe of Tedifiohy本科實驗報告實驗名稱： 實驗四 用AD轉(zhuǎn)換模塊實現(xiàn)模擬量采集課程名稱：PIC單片機實驗實驗時間：2015.12.2任課教師：梁蕻實驗地點：4-338實驗教師：梁蕻實驗類型：原理驗證 V綜合設(shè)計 自主創(chuàng)新學生姓名：學號7班級：組號：學院：信息與電子學院同組搭檔：專業(yè)：信息工程成績：信息與電子學院實驗四 用 AD 轉(zhuǎn)換模塊實現(xiàn)模擬量采集一、實驗目的 ：1. 學習使用硬件外設(shè)函數(shù)實現(xiàn) A/D 轉(zhuǎn)換2. 學習對 PIC 單片機外圍模塊 A/D 轉(zhuǎn)換器的控制二、實驗原理：1.與A/D轉(zhuǎn)換相關(guān)的特殊功能寄存器的設(shè)置16PIC18F452自帶的A/D轉(zhuǎn)換模塊的功

2、能是將一個模擬輸入信號轉(zhuǎn)換成一個 位數(shù)字信號，此模塊有 4個寄存器，分別是：（1）A/D轉(zhuǎn)換結(jié)果高位寄存器（ADRESH）（ 2） A/D 轉(zhuǎn)換結(jié)果低位寄存器 （ADRESH）（ 3） A/D 轉(zhuǎn)換控制寄存器 （ADCON0）（4）A/D轉(zhuǎn)換控制寄存器（ADCON1） 這4個寄存器的用法可參考PIC18F452數(shù)據(jù)手冊的相關(guān)內(nèi)容。2.與A/D轉(zhuǎn)換相關(guān)的硬件外設(shè)函數(shù)的使用三程序設(shè)計內(nèi)容：完善例程 2 查看程序，發(fā)現(xiàn)有幾處需要完善 在開頭處需要添加三行代碼 關(guān)閉看門狗計時器 #pragma config WDT = OFF 配置晶振 #pragma config OSC = HS 關(guān)閉低電平 #p

3、ragma config LVP = OFF并且需要配置A/D轉(zhuǎn)換器OpenADC（ADC_FOSC_8&ADC_LEFT_JUST&ADC_1ANA_0REF, ADC_CH0& ADC_INT_OFF）;通過左右對齊控制燈的開關(guān)，并且選擇 0通道，禁止中斷。修改后的實驗代碼 ：#include #include #pragma config WDT = OFF#pragma config OSC = HS#pragma config LVP = OFF/ Exercise 1 :/* Set configuration bits for use with ICD2 / PICDEM2 PL

4、US Demo Board: * - set HS oscillator* - disable watchdog timer* - disable low voltage programming*/void InitializeAD(void);void main(void)/ Set PORTD for LED output / Initial A/D module/ Convert A/D/ Waiting A/D until done/ Put A/D result on LEDsTRISD=0;InitializeAD();while(1)ConvertADC(); while(Bus

5、yADC(); PORTD=ADRESH;/*/* Function: InitializeAD * /*- Fosc/8 clock source*/*- Left justified*/*- 1 analog channels, 0 references*/*- Channel 0*/*- Disable A/D interrupt*/* void InitializeAD(void)OpenADC(ADC_FOSC_8&ADC_LEFT_JUST& ADC_1ANA_0REF,ADC_CH0&ADC_INT_OFF);/ Exercise 2 : Open the A/D periphe

6、ral with A/D Library function / See Page 11-13 of MPLAB-C18 C 編譯器庫函數(shù) 四實驗步驟：1.編輯源文件并將源文件存于mcc18目錄中 2選擇目標處理器3. 建立項目，項目名與源文件同名4. 選擇項目設(shè)置選擇語言工具套件：MPLAB c18c Toolsuite (mcc18.exe), MPLINK Object Lin ker (Mpl in k.exe)選擇MPLAB C18安裝目錄中頭文件和函數(shù)庫子目錄的路徑。5. 加載源文件和鏈接文件6 .編譯7. 用MPLAB SIM軟件模擬器進行調(diào)試8. 用MPLAB ICD2進行調(diào)試N

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11、452.h | _I Object Files 白二J Library Files：,plSF452,lib 寸 2j Linker Scriptfiaf452,lkr1一)Other Fles二| Files 乜 Symbois五.實驗結(jié)果:Output| cd | E)Buid Veton Control Frd mFilw MPLAB ICD 2 Erasing Part.Prograimmz Program Menory (0x0 - 0xl8F) Loading DebugExecut1vePirograiming DebugExecutivePrograraimg Debug Ve

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13、 TargetOutputBuild Version Control Find in FilesDebug build of project 、C:UsersUniverseParaDesktopHPLAIPreprocessor symbol 、_DEBUG is definedWed Dec 02 18:40:32 2015Clean: Deleting intermediary and output files.Clean: Deleted file *C: UsersUniverseParaDesktopMPLAB4s Clean: Deleted file *C: UsersUniv

14、erseParaDesktopMPLAB4% Clean Warning: File C:UsersUniverseParaDesktopMPLAB4s Clean: DoneExecuting: C:MCC18binmccl8.exe -p=18F452 /iC:MCC181 Executing: VC: MCC18bin_jnplink. exe /lC: MCC18lib /k*( MPLINK 4. 1, LinkerCopyright (c) 2006 Microchip Technology Inc.Errors : 0Loaded C: UsersUniverseParaDesktopMPLAB4exp4.cof.MBMM MBMB MB MB MB MM MB MB MB MB MB MBMB MBMB MB Debug build of project、C: UsersUniverseP32DesktopMPLAI Preprocessor symbol 、_DEBUG is definedWed Dec 02 18:40:33 2015BUILD SUCCEEDEDL通過轉(zhuǎn)動旋鈕，可以觀察到LED丁有規(guī)律的變化，代表數(shù)字的加減，是模擬 信號實現(xiàn)了 A/D轉(zhuǎn)換，變?yōu)閿?shù)字編碼。六、實驗感想有了之前幾次實驗的經(jīng)驗，本次實驗異常順利，不管是實驗代碼的完善，還是程