MSP430單片機(jī)AD轉(zhuǎn)換實(shí)驗(yàn)

1、AD轉(zhuǎn)換實(shí)驗(yàn)一、轉(zhuǎn)換原理MSP430F149勺A/D轉(zhuǎn)換器原理請(qǐng)參考相關(guān)書籍。 實(shí)驗(yàn)板上與AD相關(guān)的硬件電路：RV310K33J6P61S：ICAl）輸入電路RV4III-10Kf>|1 1|3EF1P50編程工作實(shí)際就是對(duì)以下寄存器的操作:寄存器類型寄存器縮寫寄存器的含義轉(zhuǎn)換控制奇存器ADC12CTL0轉(zhuǎn)換控制寄存器0ADC12CTL1轉(zhuǎn)換控制寄存器1中斷 控制 寄存器ADC12IFG中斷標(biāo)志奇存器ADC12IE中斷使能寄存器ADC12IV中斷向量寄存器存儲(chǔ)及其 控制寄存器ADC12MCTL ADC12MCTL存儲(chǔ)控制寄存器015ADC12MEM0 -ADC12MEM15存儲(chǔ)寄存器01

2、5設(shè)計(jì)主程序和中斷服務(wù)程序。二、轉(zhuǎn)換程序1、程序1:轉(zhuǎn)換結(jié)果發(fā)送到 PC主程序中進(jìn)行 A/D初始化，中斷服務(wù)程序讀A/D轉(zhuǎn)換結(jié)果，主程序過(guò)串口發(fā)送結(jié)果。“main.c ”主程序與中斷程序：/*程序功能：將ADC對(duì)P6.0端口電壓的轉(zhuǎn)換結(jié)果按轉(zhuǎn)換數(shù)據(jù)和對(duì)應(yīng)的 模擬電壓的形式通過(guò)串口發(fā)送到PC機(jī)屏幕上顯示通信格式：9600測(cè)試說(shuō)明：打開串口調(diào)試精靈，正確設(shè)置通信格式，觀察接收數(shù)據(jù)*/#i nclude <msp430.h>#include "allfunc.h"#i nclude "UARTO_Fu nc.c"#in clude "AD

3、C_Fu nc.c"#defi ne Num_of_Results 32uint resultsNum_of_Results; /保存 ADC轉(zhuǎn)換結(jié)果的數(shù)組uint average;uchar tent = 0;主函數(shù) */*void mai n( void )uchar i;uchar buffer5;WDTCTL = WDTPW + WDTHOLD; / 關(guān)狗/*下面六行程序關(guān)閉所有的10 口 */P1DIR =0XFF;P1OUT =0XFF;P2DIR =0XFF;P2OUT =0XFF;P3DIR =0XFF;P3OUT =0XFF;P4DIR =0XFF;P4OUT =0

4、XFF;P5DIR =0XFF;P5OUT =0XFF;P6DIR =0XFF;P6OUT =0XFF;關(guān)閉電平轉(zhuǎn)換關(guān)閉數(shù)碼管顯示P6DIR |= BIT2;P6OUT |= BIT2; /P6DIR|=BIT6;P6OUT&=BIT6;/Ini tUART();Ini t_ADC(); _EINT();buffer4 = '0'while(1)LPM1;Hex2Dec(average,buffer);for(i = 0; i < 4; i+) bufferi += 0x30;PutStri ngO("The digital value is:"

5、;);PutStri ng(buffer);Tran s_val(average,buffer); buffer3 = buffer2; buffer2 = buffer1;buffer1 = 0x2e - 0x30;for(i = 0; i < 4; i+) bufferi += 0x30;PutStri ng0("The an alog value is:");PutStri ng(buffer);/*函數(shù)名稱：ADC12ISR功能: ADC中斷服務(wù)函數(shù)，在這里用多次平均的計(jì)算P6.0 口的模擬電壓數(shù)值參數(shù)：無(wú)返回值：無(wú)*/#pragma vector=ADC_V

6、ECTOR_in terrupt void ADC12ISR (void)/ Move resultsstatic uchar in dex = 0;results" ndex+ = ADC12MEM0; if(in dex = Num_of_Results) uchar i;average = 0;for(i = 0; i < Num_of_Results; i+) average += resultsi;average >>= 5;/除以32in dex = 0;ten t+;if(tc nt = 250)/主要是降低串口發(fā)送速度LPM1_EXIT;tent =

7、 0;“ADC_Func.c” A/D轉(zhuǎn)換相關(guān)程序：#in elude <msp430.h> typedef un sig ned int uint;/*函數(shù)名稱：Ini t_ADC功能:初始化ADC參數(shù)：無(wú)返回值：無(wú)*void In it_ADC(void)使能ADC通道打開ADC設(shè)置采樣時(shí)間 使用采樣定時(shí)器使能ADC中斷使能轉(zhuǎn)換開始轉(zhuǎn)換P6SEL |= 0x01;/ADC12CTL0 = ADC12ON+SHT0_15+MSC; /ADC12CTL1 = SHP+CONSEQ_2;/ADC12IE = 0x01;/ADC12CTL0 |= ENC;/ADC12CTL0 |= A

8、DC12SC;/*函數(shù)名稱：Hex2Dec功能:將16進(jìn)制ADC轉(zhuǎn)換數(shù)據(jù)變換成十進(jìn)制表示形式參數(shù):Hex_Val-16進(jìn)制數(shù)據(jù)ptr-指向存放轉(zhuǎn)換結(jié)果的指針返回值：無(wú)*/void Hex2Dec( uint Hex_val,uchar *ptr)ptr0 = Hex_val / 1000;ptr1 = (Hex_val - ptr0*1000)/100;ptr2 = (Hex_val - ptr0*1000 - ptr1*100)/10;ptr3 = (Hex_val - ptr0*1000 - ptr1*100 - ptr2*10);/*函數(shù)名稱：Tran s_val功能:將16進(jìn)制ADC轉(zhuǎn)

9、換數(shù)據(jù)變換成三位10進(jìn)制真實(shí)的模擬電壓數(shù)據(jù)，并在液晶上顯示參數(shù)：Hex_Val-16 進(jìn)制數(shù)據(jù)返回值：無(wú)*/void Tran s_val(u int Hex_Val,uchar *ptr)un sig ned long caltmp;ui nt Curr_Volt;uchar t1;caltmp = Hex_Val;caltmp = (caltmp << 5) + Hex_Val; /caltmp = Hex_Val * 33caltmp = (caltmp << 3) + (caltmp << 1); /caltmp = caltmp * 10Curr_

10、Volt = caltmp >> 12;Curr_Volt = caltmp / 25變換ptr0 = Curr_Volt / 100;Hex->Dect1 = Curr_Volt - (ptr0 * 100);ptr1 = t1 / 10;ptr2 = t1 - (ptr1 * 10);“ UART0_Fu nc.c” 串口程序：#i nclude <msp430.h> typedef un sig ned char uchar;/*函數(shù)名稱：In itUART功能：初始化UART端 口參數(shù)：無(wú)返回值：無(wú)* void In itUART(void)/ P3.4,

11、5 = USART0 TXD/RXD/ En able USART0 T/RXD/ 8-bit character/ UCLK = ACLK/ 32k/9600 - 3.41/P3SEL |= 0x30;ME1 |= URXE0 + UTXE0;UCTL0 |= CHAR;UTCTL0 |= SSEL0;UBR00 = 0x03;UBR10 = 0x00;UCTLO &= SWRST;/Initialize USART state machine/*函數(shù)名稱：Sen d1Char功能:向PC機(jī)發(fā)送一個(gè)字符參數(shù):sendchar-要發(fā)送的字符返回值：無(wú)* Jvoid Sen d1Char

12、(uchar sen dchar)while (!(IFG1 & UTXIFGO); /TXBUF0 = sen dchar;等待發(fā)送寄存器為空/*函數(shù)名稱：PutSt ing功能:向PC機(jī)發(fā)送字符串并換行指令參數(shù)：ptr-指向發(fā)送字符串的指針返回值：無(wú)*/void PutStri ng(uchar *ptr)while(*ptr != '0')Sen d1Char(*ptr+);/while (!(IFG1 & UTXIFGO);TXBUF0 = 'n'/*函數(shù)名稱：PutSti ngO功能:向PC機(jī)發(fā)送字符串，無(wú)換行參數(shù)：ptr-指向發(fā)送字符

13、串的指針返回值：無(wú)*/void PutStri ng0(uchar *ptr)while(*ptr != '0')Sen d1Char(*ptr+);/發(fā)送數(shù)據(jù)發(fā)送換行指令發(fā)送數(shù)據(jù)2、程序2:轉(zhuǎn)換結(jié)果顯示在 1602顯示模塊上/*#defi ne DataDir#defi ne DataPort#defi ne Busy#defi ne CtrlDir#defi ne CLR_RS P6OUT&=BIT3;#defi ne SET_RS P6OUT|=BIT3;#defi ne CLR_RW P6OUT&=BIT4;#defi ne SET_RW P6OUT|=

14、BIT4;#defi ne CLR_EN P6OUT&=BIT5; #defi ne SET_EN P6OUT|=BIT5;/*/RS = P6.3RW = P6.4EN = P6.5“ ma in .c ”程序#in clude <msp430x14x.h>#in clude "cry1602.h" typedef un sig ned char uchar; typedef un sig ned int uint;定義 */P2DIRP2OUT0x80P6DIR函數(shù)名稱：DispNchar功能:讓液晶從某個(gè)位置起連續(xù)顯示參數(shù):x-位置的列坐標(biāo)y-位置

15、的仃坐標(biāo)n-字符個(gè)數(shù)ptr-指向字符存放位置的指N個(gè)字符返回值：無(wú)*/void DispNChar(uchar x,uchar y, uchar n, uchar *ptr) uchar i;for (i=0;i <n ;i+)Disp1Char(x+,y,ptri);if (x = 0x0f)x = 0;y A= 1;LocateXY向液晶輸入顯示字符位置的坐標(biāo)信息X-位置的列坐標(biāo)/* 函數(shù)名稱： 功 能:參 數(shù)：y-位置的行坐標(biāo)返回值：無(wú)*void LocateXY(uchar x,uchar y)uchar temp;temp = x&OxOf;y &= 0x01;

16、if(y) temp |= 0x40; /如果在第 2 行temp |= 0x80;LcdWriteComma nd(temp,1);/*函數(shù)名稱：Disp1Char功 能:在某個(gè)位置顯示一個(gè)字符參 數(shù)：X-位置的列坐標(biāo) y- 位置的行坐標(biāo) data-顯示的字符數(shù)據(jù)返回值：無(wú)*/void Disp1Char(uchar x,uchar y,uchar data) LocateXY( x, y ); LcdWriteData( data );/*函數(shù)名稱：LcdReset功能:對(duì)1602液晶模塊進(jìn)行復(fù)位操作參數(shù)：無(wú)返回值：無(wú)*/void LcdReset(void)控制線端口設(shè)為輸出狀態(tài) 數(shù)據(jù)端

17、口設(shè)為輸出狀態(tài)規(guī)定的復(fù)位操作CtrlDir |= 0x07;/DataDir = 0xFF;/LcdWriteComma nd(0x38, 0);/Delay5ms();LcdWriteComma nd(0x38, 0);Delay5ms();LcdWriteComma nd(0x38, 0);Delay5ms();LcdWriteComma nd(0x38, 1);LcdWriteComma nd(0x08, 1);LcdWriteComma nd(0x01, 1);LcdWriteComma nd(0x06, 1);LcdWriteComma nd(0x0c, 1);/* 函數(shù)名稱：Lcd

18、WriteComma nd 功能:向液晶模塊寫入命令參數(shù)：cmd-命令，chk-是否判忙的標(biāo)志，返回值：無(wú)/顯示模式設(shè)置/顯示關(guān)閉/ 顯示清屏/寫字符時(shí)整體不移動(dòng)/顯示開，不開游標(biāo)，不閃爍1:判忙，0:不判*/void LcdWriteComma nd(uchar cmd,uchar chk)if (chk) WaitForE nable(); /檢測(cè)忙信號(hào)？CLR_RS;CLR_RW;_NOP();_NOP();SET_EN;_NOP();_NOP(); CLR_EN;/DataPort = cmd;/將命令字寫入數(shù)據(jù)端口產(chǎn)生使能脈沖信號(hào)/*函數(shù)名稱：LcdWriteData功能:向液晶顯示

19、的當(dāng)前地址寫入顯示數(shù)據(jù)參數(shù)：data-顯示字符數(shù)據(jù)返回值：無(wú)*/void LcdWriteData( uchar data )WaitForE nable();/等待液晶不忙SET_RS;CLR_RW;_NOP();DataPort = data; /將顯示數(shù)據(jù)寫入數(shù)據(jù)端口_NOP();SET_EN;/產(chǎn)生使能脈沖信號(hào)_NOP();_NOP();CLR_EN;/*函數(shù)名稱：WaitForE nable功能:等待1602液晶完成部操作參 數(shù)：無(wú) 返回值：無(wú)*/void WaitForE nable(void)P2DIR &= 0x00; / 將P4 口切換為輸入狀態(tài)CLR_RS;SET_

20、RW;_NOP();SET_EN;_NOP();_NOP();檢測(cè)忙標(biāo)志while(P2IN & Busy)!=0); /CLR_EN;P2DIR |= 0xFF; /將P4 口切換為輸出狀態(tài) /*函數(shù)名稱：Delay5ms功能:延時(shí)約5ms參數(shù)：無(wú)返回值：無(wú)*void Delay5ms(void)uint i=40000;while (i != 0)I-;/*函數(shù)名稱：Delay400ms功能:延時(shí)約400ms參數(shù)：無(wú)返回值：無(wú)*void Delay400ms(void)uchar i=50;uint j;while(i-)j=7269; while(j-);“ cry1602 .c

21、 ”程序#in clude <msp430x14x.h>#in clude "cry1602.h" typedef un sig ned char uchar; typedef un sig ned int uint;/*定義 */#defi ne DataDirP2DIR#defi ne DataPortP2OUT#defi ne Busy#defi ne CtrlDir0x80P6DIR#defi ne CLR_RS P6OUT&=BIT3;#defi ne SET_RS P6OUT|=BIT3;#defi ne CLR_RW P6OUT&=

22、BIT4;#defi ne SET_RW P6OUT|=BIT4;#defi ne CLR_EN P6OUT&=BIT5; #defi ne SET_EN P6OUT|=BIT5;/*/RS = P6.3RW = P6.4EN = P6.5函數(shù)名稱：DispNchar功 能:讓液晶從某個(gè)位置起連續(xù)顯示N個(gè)字符參 數(shù)：X-位置的列坐標(biāo)y- 位置的行坐標(biāo)n-字符個(gè)數(shù)ptr-指向字符存放位置的指針返回值：無(wú)*/void DispNChar(uchar x,uchar y, uchar n, uchar *ptr) uchar i;for (i=0;i <n ;i+)Disp1Char(

23、x+,y,ptri);if (x = 0x0f)x = 0;y A= 1;未*函數(shù)名稱：LocateXY功能:向液晶輸入顯示字符位置的坐標(biāo)信息參數(shù)：x-位置的列坐標(biāo)y-位置的仃坐標(biāo)返回值：無(wú)*/void LocateXY(uchar x,uchar y)uchar temp;temp = x&OxOf;y &= 0x01;if(y) temp |= 0x40; /如果在第 2 行temp |= 0x80;LcdWriteComma nd(temp,1);/* 函數(shù)名稱：DispIChar功 能:在某個(gè)位置顯示一個(gè)字符 參 數(shù)：X-位置的列坐標(biāo)y- 位置的行坐標(biāo)data-顯示的字

24、符數(shù)據(jù)返回值：無(wú)void Disp1Char(uchar x,uchar y,uchar data) LocateXY( x, y ); LcdWriteData( data );/*函數(shù)名稱：LcdReset功能:對(duì)1602液晶模塊進(jìn)行復(fù)位操作參數(shù)：無(wú)返回值：無(wú)*Ivoid LcdReset(void)CtrlDir |= 0x07;/DataDir = 0xFF;/LcdWriteComma nd(0x38, 0);Delay5ms();LcdWriteComma nd(0x38, 0); Delay5ms();LcdWriteComma nd(0x38, 0); Delay5ms();LcdWriteComma nd(0x38, 1);LcdWriteComma nd(0x08, 1);LcdWriteComma nd(0x01, 1);LcdWriteComma nd(0x06, 1);LcdWriteComma nd(0x0c, 1);/* 函數(shù)名稱：LcdWriteComma nd 功能:向液晶模塊寫入命令參數(shù)：cmd-命令，chk-是否判忙的標(biāo)志，返回值：無(wú)控制線端口設(shè)為輸出狀態(tài) 數(shù)據(jù)端口設(shè)為輸出狀態(tài)/ 規(guī)定的復(fù)位操作/顯示模式設(shè)置/顯示關(guān)閉/