中国石油大学胜利学院MSP430期末考试题库

1、MSP430实验一1. 熟悉开发环境，掌握USB下载软件的方法。2. 用汇编语言实现：P2.0-P2.7依次点亮（参考开发板原理图）要求先软件仿真调试程序，无误后再下载到开发板运行3. 用C语言实现上述功能，其它要求同上。汇编语言参考程序清单：#include <msp430F149.h> ;包含msp430.h文件 ; NAME main ;模块名称定义 ;PUBLIC main ; ORG 0FFFEh ;中断向量表复位向量地址 DC16 init ;存放用户程序入口地址，复位后开始执行 RSEG DATA16_C ;在ROM中存放LED显示值LEDdata DB 01h,02

2、h,04h,08h,10h,20h,40h,80h RSEG CSTACK ;定义堆栈段 RSEG CODE定义代码段init: MOV #SFE(CSTACK), SP ;初始化堆栈指针main: NOP ; main program MOV.W #WDTPW+WDTHOLD,&WDTCTL ;关闭看门狗定时器 MOV.b #0, &P2SEL ;设置P1为基本I/O MOV.b #0FFh, &P2DIR ;设置P1为输出端口 MOV.b #0, &P2OUT ;使8个LED全灭again: MOV #LEDdata,R4 ;取输出表格首地址 MOV #8,

3、 R5 ;循环控制次数next: MOV.b R4+, &P2OUT ;取表中的某一种状态输出 CALL #delay ;延时 DEC R5 ;判断8种状态是否输出完 JNZ next ;否,继续 JMP again ;重新从表头开始delay: PUSH SR ;延时 mov #20,R7WAIT1: MOV #0FFFFh,R6 ;A123: DEC R6 JNZ A123 dec R7 JNZ WAIT1 POP SR RET END ; C 语言参考程序：#include "msp430f149.h" void delay(); int main( void

4、 ) unsigned char LEDdata =1, 2, 4,8,0x10,0x20,0x40,0x80; unsigned int i; WDTCTL = WDTPW + WDTHOLD; /关闭看门狗 P2SEL=0; /设置P1为基本I/O P2DIR=0xFF; /设置P1为输出端口 P2OUT=0; /使8个LED全灭 while(1) /无限循环 for ( i=0; i<8; i+) /8个LED依次点亮 P2OUT=LEDdatai; / delay(); /调用延时子程void delay() unsigned int i; /定义函数变量for (i=0;i&l

5、t;0xffff;i+); /延时MSP430实验2P1.0作为中断输入端，下降沿触发，当有中断请求时取反P2.0状态。P1.0的硬件接线参考原理图。1、用汇编语言实现（参考程序如下）#include "msp430.h"NAME mainPUBLIC mainORG 0FFFEhDC16 init ;set reset vector to 'init' labelORG 0FFE0h+PORT1_VECTOR ;中断向量表首地址+端口1中断偏址DC16 intP1 ;set port1 vector to intP1 labelRSEG CSTACK ;定

6、义堆栈段RSEG CODE ;代码段init: MOV #SFE(CSTACK), SP ;初始化SPmain: NOPMOV.w #WDTPW+WDTHOLD, &WDTCTL ; 关闭看门狗BIC.b #BIT0, &P1IE ;关闭P1.0中断允许BIC.b #BIT0, &P2SEL ;设置P2.0为基本I/O功能BIS.b #BIT0, &P2DIR ;设置P2.0为输出BIC.b #BIT0, &P2OUT ;置P2.0输出初值为0BIC b #BIT0, &P1SEL ;置P1.0作为基本I/O端口BIC.b #BIT0, &

7、;P1DIR ;置P1.0为输入BIS.b #BIT0, &P1IES ;置P1.0下降沿作中断源BIC.b #BIT0, &P1IFG ;清P1.0中断标志BIS.b #BIT0, &P1IE ;打开P1.0中断允许EINT ;允许可屏蔽中断GIE=1JMP $ ;主程循环intP1: BIT.b #BIT0, &P1IFG ;判断是否是P1IFG.0中断标志JZ exit ;不是则跳转XOR.b #BIT0, &P2OUT ;对P2.0取反BIC.b #BIT0, &P1IFG ;清P1.0中断标志exit: RETIEND2.用C语言实现（

8、参考程序如下）#include "msp430x14x.h"int main( void ) WDTCTL = WDTPW + WDTHOLD; /关闭看门狗_DINT(); /禁止可屏蔽中断GIE=0P1IE |=BIT0; / 关闭P1.0中断允许P2SEL|=BIT0; /设置P2.0为基本I/O功能P2DIR|=BIT0; /设置P2.0为输出 P2OUT &=BIT0; /置P2.0输出初值为0 P1SEL&=BIT0; /置P1.0作为基本I/O端口 P1DIR=0XFE; /置P1.0为输入 P1IES&=BIT0; /置P1.0下降沿

9、作中断源 P1IFG=0X00; /清P1.0中断标志 P1IE|=BIT0; /打开P1.0中断允许_EINT(); /允许可屏蔽中断GIE=1while(1) ; /主程循环#pragma vector=PORT1_VECTOR /置P1中断向量_interrupt void port_int(void) /中断子程 if (P1IFG=BIT0) /判断是否是P1IFG.0中断标志P2OUT =BIT0; /对P2.0取反P1IFG &=BIT0; /清P1.0中断标志 修改程序，使P1.0为上升沿触发中断，观察程序运行的差异。串行口实验#include <msp430x1

10、4x.h>void main(void) /关电平转换 WDTCTL = WDTPW + WDTHOLD; / Stop WDT P3SEL |= 0x30; / P3.4,5 = USART0 TXD/RXD ME1 |= UTXE0 + URXE0; / Enable USART0 TXD/RXD UCTL0 |= CHAR; / 8-bit character UTCTL0 |= SSEL0; / UCLK = ACLK UBR00 = 0x0D; / 32k/2400 - 13.65 UBR10 = 0x00; / UMCTL0 = 0x6B; / Modulation UCTL

11、0 &= SWRST; / Initialize USART state machine IE1 |= URXIE0; / Enable USART0 RX interrupt/ Mainloop for (;) _BIS_SR(LPM3_bits + GIE); / Enter LPM3 w/interrupt while (!(IFG1 & UTXIFG0); / USART0 TX buffer ready? TXBUF0 = RXBUF0; / RXBUF0 to TXBUF0/ UART0 RX ISR will for exit from LPM3 in Mainl

12、oop#pragma vector=UART0RX_VECTOR_interrupt void usart0_rx (void) _BIC_SR_IRQ(LPM3_bits); / Clear LPM3 bits from 0(SR)实验3系统时钟部分：注：DCOCTL：地址为056H，PUC后的值为060HBCSTCL1：地址为057H，PUC后的值为084HBCSTCL2 ：地址为058H，PUC后值为00H怎样改变系统时钟？ 因为PUC信号之后，DCOCLK被自动选做MCLK时钟信号，根据需要，MCLK的时钟源可以另外设置为LFXT1或者XT2.设置顺序如下：1.复位OscOff;2.清

13、除OFIFG；3.延时等待至少50us；4.再次检查OFIFG，如果仍然置位，则重复3，4步骤，直到OFIFG=0为止。MSP430x14x及时钟模块有关的几个引脚引脚名称引脚序号第二功能P1.4/SMCLK12SMCLK信号输出P2.0/ACLK20ACLK信号输出P5.4/MCLK48MCLK信号输出P5.5/SMCLK49SMCLK信号输出P5.6/ACLK50ACLK信号输出XIN8晶体振荡器XT1的输入口XOUT/TCLK9晶体振荡器XT1的输出口或测试时钟输入口XT2IN53晶体振荡器XT2的输入口XT2OUT52晶体振荡器XT2的输出口P2.5/Rosc25外界一电阻以确定DCO

14、的工作频率基础时钟模块试验程序1： 设MCLK=XT2，SMCLK=DCOCLK，将MCLK由5.4输出程序如下：#include <msp430x14x.h>void main(void) unsigned int i; WDTCTL = WDTPW + WDTHOLD; /停止看门狗 P5DIR |= 0X10; /设置P5.4为输出 P5SEL |= 0X10; /设置P5.4为MCLK输出 BCSCTL1 &= XT2OFF; /设置XT2为有效 do IFG1 &= OFIFG; /清除振荡器失效标志 for(i = 0xFF;i>0;i-); /稳

15、定时间 while(IFG1 & OFIFG) != 0); /如果振荡器失效标志存在则继续循环。 BCSCTL2 |= SELM1; /设置MCLK = XT2 for(;);基础时钟模块试验程序2： 设置ACLK=MCLK=LFXT1=LF，将MCLK通过P5.4输出。#include <msp430x14x.h>void main(void) unsigned int i; WDTCTL = WDTPW + WDTHOLD; /停止看门狗 / P5DIR |= 0X10; /设置P5.4为输出 P5SEL |= 0X10; /设置P5.4为MCLK输出 BCSCTL1

16、 &= XTS; /设置LFXT1为低速模式 do IFG1 &= OFIFG; /清除振荡器失效标志 for(i = 0xFF;i>0;i-); /稳定时间 while(IFG1 & OFIFG) != 0); /如果振荡器失效标志存在则继续循环 BCSCTL2 |= SELM1+SELM0; /设置MCLK=LFXT1 for(;);低功耗部分：试验程序1：#include <msp430x14x.h>void main(void) BCSCTL1 |= DIVA_2; / ACLK/4 WDTCTL = WDT_ADLY_1000; / WDT

17、1s/4 interval timer IE1 |= WDTIE; / Enable WDT interrupt P3DIR |= BIT1; / Set P3.1 to output direction P3OUT &= BIT1; / Set P3.1 to 0 while(1) int i; _BIS_SR(LPM3_bits + GIE); / Enter LPM3 P3OUT |=BIT1; / Set P3.1 LED on for (i = 5000; i>0; i-); / Delay P3OUT &= BIT1; / Clear P3.1 LED off

18、#pragma vector=WDT_VECTOR_interrupt void watchdog_timer (void) _BIC_SR_IRQ(LPM3_bits) / Clear LPM3 bits from 0(SR)看门狗定时器：看门狗定时器实验程序：# include <msp430x14x.h>void main(void)WDTCTL = WDT_MDLY_32; / 定时周期为32msIE1 |= WDTIE; / 使能WDT中断 P1DIR |= 0x01; / P1.0输出 _EINT(); / 系统中断允许 for (;) _BIS_SR(CPUOFF);

19、 / 进入 LPM0 _NOP(); / 看门狗中断服务子程序#pragma vector= WDT_VECTOR_interrupt void watchdog_timer (void) P1OUT = 0x01; / P1.0取反实验5 （定时器部分）相关寄存器一、1、分析给定程序，在重要语句后加上注释，2、改变定时器的时钟源，计算相关引脚的翻转频率3、改变定时器的计数模式，（增计数或连续计数）4、开放捕获比较模块1和模块2的中断，要求模块1的翻转频率为模块0的一倍；模块2是模块1的一倍。5、若定时器选用辅助时钟，计数器采用增模式计数，利用模块0的中断使P20的翻转频率为100HZ. #i

20、nclude <msp430x14x.h>void main(void) WDTCTL = WDTPW + WDTHOLD; / P6DIR |= BIT2;P6OUT |= BIT2; /关电平转换 P2DIR |= BIT0+BIT7; / CCTL0 = CCIE; / CCR0 interrupt enabled CCR0 = 33; / TACTL = TASSEL_1 + MC_1; / _BIS_SR(LPM0_bits + GIE); / / Timer A0 interrupt service routine#pragma vector=TIMERA0_VECTO

21、R /_interrupt void Timer_A (void) P2OUT = BIT0; / CCR0 += 32768; / #pragma vector=TIMERA1_VECTOR /_interrupt void Timer_A1 (void) switch(TAIV) case 0x02:break; / case 0x04:break; / case 10:P2OUT=BIT7; / break;二、实验要求：1、示波器分别连接P1.2和P1.3，改变CCR1和CCR2观察占空比的变化。2、改变CCR0的值，观察PWM的周期或频率的变化。3、修改如下程序，使PWM的频率为10

22、0HZ,占空比为50.#include <msp430x14x.h>Void main(void)WDTCTL=WDTPW+WDTHOLD;P1DIR|=0X0C;PISEL|=0X0C; /P1.2和P1.3为模块功能CCR0=512-1; /PWM的宽度CCTL1=OUTMOC_7； /CCR1的输出单元P1.2复位/置位模式CCR1=384; CCTL2=OUTMOD_7;CCR2=128;TACTL=TASSEL_1+MC_1;_BIS_SR(LPM3_bits );三、CCR0捕获比较寄存器的捕获功能应用基本原理：每产生一次上升沿，在中断服务程序中取反P0.7，用示波器测

23、量验证捕获信号的周期。实验要求：用导线连接P2.0P1.1，示波器接在P2.7端口。 改变辅助时钟的频率被测信号的周期。#include <msp430x14x.h>unsigned int new_cap=0;unsigned int old_cap=0;unsigned int cap_diff=0;unsigned int diff_array16;unsigned int capture_array16;unsigned char index=0;unsigned char count=0;void main(void) volatile unsigned int i;WD

24、TCTL=WDTPW+WDTHOLD;for(i=0;i<20000;i+)P1DIR=0X01;P1OUT &=0X01;P1SEL=0X02;P2DIR=0X01;P2SEL|=0X01;/P2.0为辅助时钟的输出BCSCTL1|=DIVA_3;CCTL0=CM1+SCS+CCIS_0+CAP+CCIE;/上升捕获+同步+CCI0A(P1.1信号源)+捕获功能+捕获中断TACTL=TASSEL_2+MC_2 ;_BIS_SR(LPM0_bits+GIE);#pragma vector=TIMERA0_VECTOR_interrupt void timera0(void) ne

25、w_cap=TACCR0;cap_diff=new_cap-old_cap;diff_arrayindex=cap_diff;capture_arrayindex+=new_cap;P2OUT=BIT7;if(index=16)index=0;P1OUT=0X01;old_cap=new_cap;count+; if(count=32)count=0;_NOP();试验程序：1、/ MSP-FET430P140 Demo - USART0, Ultra-Low Pwr UART 2400 Echo ISR, 32kHz ACLK/ Description: Echo a received ch

26、aracter, RX ISR used. In the Mainloop UART0/ is made ready to receive one character with interrupt active. The Mainloop/ waits in LPM3. The UART0 ISR forces the Mainloop to exit LPM3 after/ receiving one character which echo's back the received character./ ACLK = UCLK0 = LFXT1 = 32768, MCLK = SM

27、CLK = DCO 800k/ Baud rate divider with 32768hz XTAL 2400 = 32768Hz/2400 = 13.65 (000Dh)/ /* An external watch crystal is required on XIN XOUT for ACLK */ MSP430F149/ /| XIN|-/ | | | 32kHz/ -|RST XOUT|-/ | P3.4|->/ | | 2400 - 8N1/ | P3.5|<-/ M. Buccini/ Texas Instruments Inc./ Feb 2005/ Built w

28、ith IAR Embedded Workbench Version: 3.21A#include <msp430x14x.h>void main(void) P6DIR |= BIT2;P6OUT |= BIT2; /关电平转换 WDTCTL = WDTPW + WDTHOLD; / Stop WDT P3SEL |= 0x30; / P3.4,5 = USART0 TXD/RXD ME1 |= UTXE0 + URXE0; / Enable USART0 TXD/RXD UCTL0 |= CHAR; / 8-bit character UTCTL0 |= SSEL0; / UC

29、LK = ACLK UBR00 = 0x0D; / 32k/2400 - 13.65 UBR10 = 0x00; / UMCTL0 = 0x6B; / Modulation UCTL0 &= SWRST; / Initialize USART state machine IE1 |= URXIE0; / Enable USART0 RX interrupt/ Mainloop for (;) _BIS_SR(LPM3_bits + GIE); / Enter LPM3 w/interrupt while (!(IFG1 & UTXIFG0); / USART0 TX buffe

30、r ready? TXBUF0 = RXBUF0; / RXBUF0 to TXBUF0/ UART0 RX ISR will for exit from LPM3 in Mainloop#pragma vector=UART0RX_VECTOR_interrupt void usart0_rx (void) _BIC_SR_IRQ(LPM3_bits); / Clear LPM3 bits from 0(SR)2、/ MSP-FET430P140 Demo - USART0, Ultra-Low Pwr UART 9600 Echo ISR, 32kHz ACLK/ Description:

31、 Echo a received character, RX ISR used. In the Mainloop UART0/ is made ready to receive one character with interrupt active. The Mainloop/ waits in LPM3. The UART0 ISR forces the Mainloop to exit LPM3 after/ receiving one character which echo's back the received character./ ACLK = UCLK0 = LFXT1

32、 = 32768, MCLK = SMCLK = DCO 800k/ Baud rate divider with 32768hz XTAL 9600 = 32768Hz/9600 = 3.41 (0003h 4Ah )/ /* An external watch crystal is required on XIN XOUT for ACLK */ MSP430F149/ /| XIN|-/ | | | 32kHz/ -|RST XOUT|-/ | P3.4|->/ | | 9600 - 8N1/ | P3.5|<-/ M. Buccini/ Texas Instruments

33、Inc./ Feb 2005/ Built with IAR Embedded Workbench Version: 3.21A#include <msp430x14x.h>void main(void) P6DIR |= BIT2;P6OUT |= BIT2; /关电平转换 WDTCTL = WDTPW + WDTHOLD; / Stop WDT P3SEL |= 0x30; / P3.4,5 = USART0 TXD/RXD ME1 |= UTXE0 + URXE0; / Enable USART0 TXD/RXD UCTL0 |= CHAR; / 8-bit characte

34、r UTCTL0 |= SSEL0; / UCLK = ACLK UBR00 = 0x03; / 32k/9600 - 3.41 UBR10 = 0x00; / UMCTL0 = 0x4A; / Modulation UCTL0 &= SWRST; / Initialize USART state machine IE1 |= URXIE0; / Enable USART0 RX interrupt/ Mainloop for (;) _BIS_SR(LPM3_bits + GIE); / Enter LPM3 w/interrupt while (!(IFG1 & UTXIF

35、G0); / USART0 TX buffer ready? TXBUF0 = RXBUF0; / RXBUF0 to TXBUF0/ UART0 RX ISR will for exit from LPM3 in Mainloop#pragma vector=UART0RX_VECTOR_interrupt void usart0_rx (void) _BIC_SR_IRQ(LPM3_bits); / Clear LPM3 bits from 0(SR)3、/ MSP-FET430P140 Demo - USART0, Ultra-Low Pwr UART 9600 Echo ISR, 8M

36、Hz SMCLK /*#include <msp430x14x.h>void main(void) volatile unsigned int i; P6DIR |= BIT2;P6OUT |= BIT2; /关电平转换 P3SEL |= 0x30; / P3.4,5 = USART0 TXD/RXD WDTCTL = WDTPW + WDTHOLD; / Stop WDT BCSCTL1 &= XT2OFF; / XT2on do IFG1 &= OFIFG; / Clear OSCFault flag for (i = 0xFF; i > 0; i-);

37、/ Time for flag to set while (IFG1 & OFIFG); / OSCFault flag still set? BCSCTL2 |= SELM_2 + SELS; / MCLK = SMCLK = XT2 (safe) ME1 |= UTXE0 + URXE0; / Enable USART0 TXD/RXD UCTL0 |= CHAR; / 8-bit character UTCTL0 |= SSEL1; / UCLK = SMCLK UBR00 = 0x41; / 8Mhz/19200 417 UBR10 = 0x03; / UMCTL0 = 0x0

38、0; / no modulation UCTL0 &= SWRST; / Initialize USART state machine IE1 |= URXIE0; / Enable USART0 RX interrupt _BIS_SR(LPM0_bits + GIE); / Enter LPM0 w/ interrupt#pragma vector=UART0RX_VECTOR_interrupt void usart0_rx (void) while (!(IFG1 & UTXIFG0); / USART0 TX buffer ready? TXBUF0 = RXBUF0

39、; / RXBUF0 to TXBUF0在程序3的基础上修改程序，实现自收自发，接受的数据送P2口显示。#include <msp430x14x.h>typedef unsigned int uint; uint j;void main(void) P6DIR |= BIT2;P6OUT |= BIT2; /关电平转换 WDTCTL = WDTPW + WDTHOLD; / Stop WDT P3SEL |= 0x30; / P3.4,5 = USART0 TXD/RXD P2DIR=0XFF; ME1 |= UTXE0 + URXE0; / Enable USART0 TXD/R

40、XD UCTL0 |= CHAR+LISTEN; / 8-bit character UTCTL0 |= SSEL0; / UCLK = ACLK UBR00 = 0x03; / 32k/9600 - 3.41 UBR10 = 0x00; / UMCTL0 = 0x4A; / Modulation UCTL0 &= SWRST; / Initialize USART state machine IE1 |= URXIE0; / Enable USART0 RX interrupt TXBUF0 = 0X00;/ Mainloop for (;) _BIS_SR(LPM3_bits +

41、GIE); / Enter LPM3 w/interrupt while (!(IFG1 & UTXIFG0); / USART0 TX buffer ready? j =RXBUF0-1; P2OUT = j; / RXBUF0 to TXBUF0 for(uint i=0;i<=5000;i+); for(uint i=0;i<=5000;i+); for(uint i=0;i<=5000;i+); for(uint i=0;i<=5000;i+); for(uint i=0;i<=5000;i+); for(uint i=0;i<=5000;i

42、+); for(uint i=0;i<=5000;i+); for(uint i=0;i<=5000;i+); TXBUF0=j;/ UART0 RX ISR will for exit from LPM3 in Mainloop#pragma vector=UART0RX_VECTOR_interrupt void usart0_rx (void) _BIC_SR_IRQ(LPM3_bits); / Clear LPM3 bits from 0(SR)#include <msp430x14x.h>void main(void) WDTCTL = WDTPW + WDT

43、HOLD; / Stop WDT P6DIR |= BIT2;P6OUT |= BIT2; /关闭电平转换 ADC12CTL0 = SHT0_2 + ADC12ON; / Set sampling time, turn on ADC12 ADC12CTL1 = SHP; / Use sampling timer ADC12IE = 0x01; / Enable interrupt ADC12CTL0 |= ENC; / Conversion enabled P6SEL |= 0x01; / P6.0 ADC option select P2DIR |= BIT4; / P2.4 output

44、for (;) ADC12CTL0 |= ADC12SC; / Sampling open _BIS_SR(CPUOFF + GIE); / LPM0, ADC12_ISR will force exit/ ADC12 interrupt service routine#pragma vector=ADC_VECTOR_interrupt void ADC12_ISR (void) if (ADC12MEM0 < 0x7FF) P2OUT &= BIT4; / Clear P2.4 LED off else P2OUT |= BIT4; / Set P2.4 LED on _BIC_SR_