单片机复习题答案(14页).doc

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1、-单片机复习题答案-第 14 页复习题考试时间：90分钟试题1：小灯闪烁要求利用LauncnPad上的LED小灯(P1.0 P1.6)，通过循环延时程序控制小灯闪烁，要求修改内部DCO系统时钟，控制小灯闪烁的速度，要求至少有四种明显变化的速度。要求画出硬件接线图。主程序：#include void GPIO_init();void BCSplus_init(void);void P1_IODect();void P13_Onclick();void main()WDTCTL=WDTPW+WDTHOLD;GPIO_init();_EINT();_enable_interrupts();while

2、(1)P1OUT=BIT0;P1OUT=BIT6;_delay_cycles(1000000);void GPIO_init()P1DIR|=BIT0+BIT6;P1OUT|=BIT0;P1OUT&=BIT6;P1IFG&=BIT0;P1REN|=BIT3;P1OUT|=BIT3;P1DIR&=BIT3;P1IES|=BIT3;P1IE|=BIT3;void P1_IODect()unsigned char Push_Key=0;Push_Key=P1IFG&(P1DIR);_delay_cycles(10000);if(P1IN&Push_Key)=0)switch(Push_Key)cas

3、e BIT0: break;case BIT1: break;case BIT2: break;case BIT3: P13_Onclick();break;default:break;#pragma vector=PORT1_VECTOR_interrupt void P1_ISR(void)_DINT(); P1_IODect();P1IFG&=0X00;_EINT();void P13_Onclick()static unsigned int Freq=0;if(Freq3)Freq=0;switch(Freq)case 0:BCSCTL1 = CALBC1_1MHZ; DCOCTL =

4、 CALDCO_1MHZ;break;case 1:BCSCTL1 = CALBC1_8MHZ; DCOCTL = CALDCO_8MHZ;break;case 2:BCSCTL1 = CALBC1_12MHZ; DCOCTL = CALDCO_12MHZ;break;case 3:BCSCTL1 = CALBC1_16MHZ; DCOCTL = CALDCO_16MHZ;break;default:break;Freq+;试题2：LCD显示学号在提供的段式LCD驱动程序基础上，编写主程序显示学号。要求画出硬件接线图。主程序：#include#include#include#includema

5、in()WDTCTL=WDTPW+WDTHOLD;TCA6416A_Init();HT1621_init();while(1)LCD_DisplayDigit(1,10);LCD_DisplayDigit(4,9);LCD_DisplayDigit(8,8);LCD_DisplayDigit(4,7);LCD_DisplayDigit(1,1);LCD_DisplayDigit(1,2);LCD_DisplayDigit(0,3);LCD_DisplayDigit(3,4);HT1621_Reflash(LCD_Buffer);显示为本人学号试题3：流水灯在提供的TCA6416驱动程序基础上，

6、要求首先实现8个外扩小灯的循环显示即流水灯功能，循环显示方式为：(要求画出硬件接线图)加入TCA6416A.cvoid LEDFlash(void)unsigned char out0_72=0;unsigned char Flag1=0x7F;unsigned char Flag2=0xFE;unsigned int i;for(i=0;i1)|0x80;TCA6416_Tx_Frame(out0_7,2);/ 将更新后的数据包，写入芯片寄存器_delay_cycles(16000000); for(i=0;i8;i+)out0_70 = Out_CMD0;out0_71 = Flag2;F

7、lag2=(Flag21)|0x01;TCA6416_Tx_Frame(out0_7,2);/ 将更新后的数据包，写入芯片寄存器_delay_cycles(16000000);主程序：#include #includevoid main(void)WDTCTL=WDTPW+WDTHOLD;TCA6416A_Init();BCSCTL1 = CALBC1_12MHZ;DCOCTL = CALDCO_12MHZ;while(1)LEDFlash();试题4：按键外部中断要求利用LaunchPad板，P1.3外接按键，控制LED小灯（P1.6）状态，通过外部中断实现。要求画出硬件接线图。主程序：（非

8、常规方法）#includemsp430g2553.hvoid P13_Onclick();void P1_IODect();void GPIO_init();void main(void)WDTCTL=WDTPW+WDTHOLD;GPIO_init();_EINT();TACTL=TASSEL_2+ID_0+MC_1+TACLR+TAIE+TAIFG;TACCTL1=OUTMOD_7;TACCR0=500;_BIS_SR(LPM0_bits+GIE);LPM3;void GPIO_init()P1DIR|=BIT6;P1SEL|=BIT6;P1REN|=BIT3;P1OUT|=BIT3;P1D

9、IR&=BIT3;P1IES|=BIT3;P1IE|=BIT3;#pragma vector =PORT1_VECTOR_interrupt void PORT1_ISR(void)P1_IODect();P1IFG=0;void P1_IODect()unsigned int key=0;key=P1IFG&(P1DIR);_delay_cycles(10000);if(P1IN&key)=0)switch(key)/case BIT0:P10_Onclick();break;case BIT3:P13_Onclick();break;default:break;void P13_Oncli

10、ck()static unsigned int Freq=0;if(Freq=3)Freq=0;else Freq+;switch(Freq)case 0:TACCR1=100;break;case 1:TACCR1=0;break;case 2:TACCR1=100;break;case 3:TACCR1=0;break;default:break;试题5:定时器利用定时器定时0.5S功能，让小灯亮0.5s,暗0.5s方式闪烁。要求采用定时器中断功能实现。主程序：#includevoid BCSplus_init(void);void main(void)WDTCTL=WDTPW+WDTHO

11、LD;BCSplus_init();P1SEL=0X00;P1DIR|=0X01;P1OUT|=0X01;while(1)P1OUT=0X01;_delay_cycles(500000);void BCSplus_init(void) BCSCTL2 = SELM_0 + DIVM_0 + DIVS_0; if (CALBC1_1MHZ != 0xFF) DCOCTL = 0x00; BCSCTL1 = CALBC1_1MHZ; /* Set DCO to 1MHz */ DCOCTL = CALDCO_1MHZ; BCSCTL1 |= XT2OFF + DIVA_0;试题6：串口控制小灯亮灭

12、要求通过串口连接实验箱和计算机，编制程序，从PC机发送字符A到单片机，单片机接收后关闭LED小灯。发送字符B到单片机，单片机接收后点亮LED小灯。主程序：#include msp430g2553.hvoid UART_RX(void);unsigned char temp;void main(void) / CSL_init(); / Activate Grace-generated configurationWDTCTL = WDTPW + WDTHOLD;P1DIR|=BIT0;P1SEL = BIT1 + BIT2;P1SEL2 = BIT1 + BIT2;if (CALBC1_1MHZ

13、 != 0xFF) DCOCTL = 0x00; BCSCTL1 = CALBC1_1MHZ; /* Set DCO to 1MHz */ DCOCTL = CALDCO_1MHZ; UCA0CTL1 |= UCSWRST; UCA0CTL1 = UCSSEL_2 + UCSWRST; UCA0MCTL = UCBRF_0 + UCBRS_1; UCA0BR0 = 104; UCA0CTL1 &= UCSWRST; IFG2 &= (UCA0RXIFG); IE2 |= UCA0RXIE; _bis_SR_register(GIE); LPM0;#pragma vector=USCIAB0RX

14、_VECTOR_interrupt void USCI0RX_ISR_HOOK(void)UART_RX();void UART_RX(void)temp=UCA0RXBUF;if(temp=B)P1OUT|=BIT0;Else if(temp=A)P1OUT&=BIT0;while (!(IFG2&UCA0TXIFG);UCA0TXBUF=temp;题7：串口通信要求通过串口连接实验箱和计算机，编制程序，从PC机发送字符到单片机，单片机在LCD上显示接收到的字符。#include#include#include#includevoid UART_RX(void);unsigned char

15、temp;void main(void) / CSL_init(); / Activate Grace-generated configurationWDTCTL = WDTPW + WDTHOLD;P1DIR|=BIT0;P1SEL = BIT1 + BIT2;P1SEL2 = BIT1 + BIT2;if (CALBC1_1MHZ != 0xFF) DCOCTL = 0x00; BCSCTL1 = CALBC1_1MHZ; /* Set DCO to 1MHz */ DCOCTL = CALDCO_1MHZ; UCA0CTL1 |= UCSWRST; UCA0CTL1 = UCSSEL_2

16、 + UCSWRST; UCA0MCTL = UCBRF_0 + UCBRS_1; UCA0BR0 = 104; UCA0CTL1 &= UCSWRST; IFG2 &= (UCA0RXIFG); IE2 |= UCA0RXIE; _bis_SR_register(GIE); LPM0;#pragma vector=USCIAB0RX_VECTOR_interrupt void USCI0RX_ISR_HOOK(void)UART_RX();void UART_RX(void)temp=UCA0RXBUF;TCA6416A_Init();HT1621_init();LCD_DisplayDig

17、it(temp-48,6);HT1621_Reflash(LCD_Buffer);while (!(IFG2&UCA0TXIFG);UCA0TXBUF=temp;r试题8：定时器使用单片机的内部定时器模块，制作电子钟并通过液晶显示时间信息。电子钟能正常运行时在LCD液晶上显示”XX:XX:XX”(时分秒)主程序：#include#include#include#includeint i,j=0,a1,a2,a3;void js();void GPIO_init();main() WDTCTL=WDTPW+WDTHOLD;TCA6416A_Init();HT1621_init();GPIO_in

18、it();js();void js(void) TCA6416A_Init();HT1621_init();_DINT();while(1)i+;if(i%2)LCD_DisplaySeg(99); LCD_DisplaySeg(83);if(i%2=0)LCD_ClearSeg(83); LCD_ClearSeg(99);a1=i/3600;a2=(i-a1*3600)/60;a3=i-a1*3600-a2*60;LCD_DisplayDigit(a1/10%6,1);LCD_DisplayDigit(a1%10,2 );LCD_DisplayDigit(a2/10%6,3);LCD_Dis

19、playDigit(a2%10,4);LCD_DisplayDigit(a3/10%6,5);LCD_DisplayDigit(a3%10,6);_delay_cycles(1000000);HT1621_Reflash(LCD_Buffer);void GPIO_init()P1REN|=BIT3;P1OUT|=BIT3;P1DIR&=BIT3;P1IES|=BIT3;P1IE|=BIT3;试题9：温度测量显示要求MSP430G2553单片机ADC，内部温度传感器进行测量，并把温度结果通过LCD显示。要求画出硬件接线图。主程序：#include #include #include#inclu

20、de#include#includevoid ADC10_init(void);void BCSplus_init(void);long IntDegc;unsigned int Value;int main(int argc, char *argv) /WDTplus_init(); WDTCTL=WDTPW+WDTHOLD; TCA6416A_Init(); HT1621_init(); BCSplus_init(); ADC10_init(); while(1) ADC10CTL0|= ENC+ADC10SC; /while(ADC10DTCL1&BIT0); Value=ADC10ME

21、M; IntDegc=(Value-673)*423)/1024; LCD_DisplayDigit(IntDegc/100,1); LCD_DisplayDigit(IntDegc/10%10,2); LCD_DisplayDigit(IntDegc%10,3); LCD_DisplaySeg(24); LCD_DisplaySeg(51); LCD_DisplaySeg(55); LCD_DisplaySeg(54); LCD_DisplaySeg(50); LCD_DisplaySeg(63); LCD_DisplaySeg(57); LCD_DisplaySeg(56); LCD_Di

22、splaySeg(59); HT1621_Reflash(LCD_Buffer); /return (0);试题10：信号周期检测，并通过串口显示。要求利用定时器的输入捕捉功能，检测输入信号周期，并通过串口发送给PC显示。#include msp430g2553.hunsigned char temp;unsigned char string=Please input controled number:;void putchar(unsigned char c);void putstr(unsigned char *s);void main(void) WDTCTL = WDTPW + WDT

23、HOLD; / Stop WDT if (CALBC1_1MHZ=0xFF) / If calibration constant erased while(1); / do not load, trap CPU! DCOCTL = 0; / Select lowest DCOx and MODx settings BCSCTL1 = CALBC1_1MHZ; / Set DCO DCOCTL = CALDCO_1MHZ; P1DIR|=BIT6; P1DIR |= BIT2; /P1.2 UART_TX P1DIR &=BIT1; /P1.2 UART_RX P1SEL |= BIT1+BIT

24、2; /select P1.1 and P1.2 as UART port P1SEL2 |= BIT1+BIT2; UCA0CTL1 |= UCSWRST; UCA0CTL1 = UCSSEL_2 + UCSWRST; UCA0MCTL = UCBRF_0 + UCBRS_1; UCA0BR0 = 104; UCA0CTL1 &= UCSWRST; IE2 |= UCA0RXIE; _EINT(); putstr(string); LPM0; /_bis_SR_register(LPM0_bits + GIE); / Enter LPM0, interrupts enabled#pragma

25、 vector=USCIAB0RX_VECTOR_interrupt void USCIA0_ISR(void)while (!(IFG2&UCA0TXIFG); / USCI_A0 TX buffer ready?UCA0TXBUF = UCA0RXBUF; temp=UCA0RXBUF; if(temp=A) P1OUT|=BIT6; else P1OUT&=BIT6;void putchar(unsigned char c)while (!(IFG2&UCA0TXIFG);UCA0TXBUF=c;void putstr(unsigned char *s)IE2&=UCA0RXIE;whi

26、le(*s)!=0)putchar(*s);s+;putchar(n);IE2|=UCA0RXIE;TACTL=TASSEL_2+MC_2+TAIE+TACLR;TACTL=TASSEL_2+MC_2+TAIE+TACLR;试题11：PWM控制小灯亮度要求利用LaunchPad开发板上P1.3按键，P1.6TA输出口接LED（用跳线帽连接），编写一段代码，通过按键改变PWM占空比，从而改变LED亮度。要求至少实现四级亮度变化。#include void GPIO_init();void BCSplus_init(void);void P1_IODect();void P13_Onclick()

27、;void main()WDTCTL=WDTPW+WDTHOLD;GPIO_init();_EINT();_enable_interrupts();while(1)P1OUT=BIT0;P1OUT=BIT6;_delay_cycles(1000000);void GPIO_init()P1DIR|=BIT0+BIT6;P1OUT|=BIT0;P1OUT&=BIT6;P1IFG&=BIT0;P1REN|=BIT3;P1OUT|=BIT3;P1DIR&=BIT3;P1IES|=BIT3;P1IE|=BIT3;void P1_IODect()unsigned char Push_Key=0;Push

28、_Key=P1IFG&(P1DIR);_delay_cycles(10000);if(P1IN&Push_Key)=0)switch(Push_Key)case BIT0: break;case BIT1: break;case BIT2: break;case BIT3: P13_Onclick();break;default:break;#pragma vector=PORT1_VECTOR_interrupt void P1_ISR(void)_DINT(); P1_IODect();P1IFG&=0X00;_EINT();void P13_Onclick()static unsigned int Freq=0;if(Freq3)Freq=0;switch(Freq)case 0:BCSCTL1 = CALBC1_1MHZ; DCOCTL = CALDCO_1MHZ;break;case 1:BCSCTL1 = CALBC1_8MHZ; DCOCTL = CALDCO_8MHZ;break;case 2:BCSCTL1 = CALBC1_12MHZ; DCOCTL = CALDCO_12MHZ;break;case 3:BCSCTL1 = CALBC1_16MHZ; DCOCTL = CALDCO_16MHZ;break;default:break;Freq+;