PIC實(shí)驗(yàn)四用AD轉(zhuǎn)換模塊實(shí)現(xiàn)模擬量采集資料

1、1/tsfitnfe of Tedifiohy本科實(shí)驗(yàn)報(bào)告實(shí)驗(yàn)名稱： 實(shí)驗(yàn)四 用AD轉(zhuǎn)換模塊實(shí)現(xiàn)模擬量采集課程名稱：PIC單片機(jī)實(shí)驗(yàn)實(shí)驗(yàn)時(shí)間：2015.12.2任課教師：梁蕻實(shí)驗(yàn)地點(diǎn)：4-338實(shí)驗(yàn)教師：梁蕻實(shí)驗(yàn)類型：原理驗(yàn)證 V綜合設(shè)計(jì) 自主創(chuàng)新學(xué)生姓名：學(xué)號(hào)7班級(jí)：組號(hào)：學(xué)院：信息與電子學(xué)院同組搭檔：專業(yè)：信息工程成績(jī)：信息與電子學(xué)院實(shí)驗(yàn)四 用 AD 轉(zhuǎn)換模塊實(shí)現(xiàn)模擬量采集一、實(shí)驗(yàn)?zāi)康?：1. 學(xué)習(xí)使用硬件外設(shè)函數(shù)實(shí)現(xiàn) A/D 轉(zhuǎn)換2. 學(xué)習(xí)對(duì) PIC 單片機(jī)外圍模塊 A/D 轉(zhuǎn)換器的控制二、實(shí)驗(yàn)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(gè)模擬輸入信號(hào)轉(zhuǎn)換成一個(gè) 位數(shù)字信號(hào)，此模塊有 4個(gè)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(gè)寄存器的用法可參考PIC18F452數(shù)據(jù)手冊(cè)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(jì)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(kāi)頭處需要添加三行代碼 關(guān)閉看門(mén)狗計(jì)時(shí)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(guò)左右對(duì)齊控制燈的開(kāi)關(guān)，并且選擇 0通道，禁止中斷。修改后的實(shí)驗(yàn)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(kù)函數(shù) 四實(shí)驗(yàn)步驟：1.編輯源文件并將源文件存于mcc18目錄中 2選擇目標(biāo)處理器3. 建立項(xiàng)目，項(xiàng)目名與源文件同名4. 選擇項(xiàng)目設(shè)置選擇語(yǔ)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(kù)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(jìn)行調(diào)試8. 用MPLAB ICD2進(jìn)行調(diào)試N

7、ew ProjectXPnoject Nameep4Project D iiectovD U seisUniverseParaD Ewkf 叩MPLAB 4E rowseHelpOKCancelBuild Options For Project VxpS.mcpMPASM AssemblerMPLINK LinkerMPLAB dBDi rectoriCustom Build Tratfr MPASM/C17/C1BDirectories and Search PathsSlhow direct 口 比詁第 For： InclijdmiPathNewDownUp|C.MCC10hBidd Di

8、rectory PolicyO Aserrtile/Compile m souroe-file dii比tctji link in outpul: direcioryAsserrible/CompileAink in (tie pcoject diectoryMPASM AssemblerMPLINK LinkerMPLAB C18Dirertories Custom Build Trace MPASM/C17/C18 SuiteDirectories and Search Pah$Show diectories fo:Library Search PathvNewDeleteDownUpSu

9、ite DefaultsBuild Directory PolicyO AssemWe/Compile in source-file directory, Irk r output drectory() A$emble/Connpile/link in the project directory期助族(A)Build Options For Project exp3.mcpwMPASM AssemblerMPLINK LinkerMPLAB C18Directories Custom Build Trace MPASM/C17/C18 SuiteDirectories and Search P

10、athsS how directories for:Linker-S cript S earch Path7NewDeleteSuite DefaultsBuid Directory PolicyO Asembte/Compile in source-file drecto(yz link in output directory Assembte/Compfe/Link in the protect direclocy群助族(A)21 exp4.mcw 1=1 回 S30- _I exp4mcp- _| Source Fie; =) exp4x l一J Header Hies1 T) pl8f

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(shí)驗(yàn)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

12、ctor Pro(raiurang RSBUG Verifying . Progran MenoryDebug ExecutiveDebug VectorVerify SucceededPrograiming Configuration Bits Config MenoryVerifying： configuration neitoryVerify SucceededConnecting to debug executive Prograiunmg succeeded02-Dec 2015 18 40 33MPLAB ICD 2 ready for next operation Running

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(guò)轉(zhuǎn)動(dòng)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(hào)實(shí)現(xiàn)了 A/D轉(zhuǎn)換，變?yōu)閿?shù)字編碼。六、實(shí)驗(yàn)感想有了之前幾次實(shí)驗(yàn)的經(jīng)驗(yàn)，本次實(shí)驗(yàn)異常順利，不管是實(shí)驗(yàn)代碼的完善，還是程