几个msp430单片机的重点例程

几个msp430单片机的重点例程#include "msp430x14x.h"#include "ioport.h"//按键按下,则P1.0状态取反键盘检测void main(void){sys_init();port_init();while(1){while((P1IN&0xf0)==0xf0){}; // 等待有键按下delay(10000); //软件去抖if((P1IN&0xf0)!=0xf0){switch (P1IN&0xf0){case 0xe0:{ //S1键按下处理...P1OUT ^=BIT0;}break;case 0xd0:{ //S2键按下处理...P1OUT ^=BIT0;}break;case 0xb0:{ //S3键按下处理...P1OUT ^=BIT0;}break;case 0x70:{ //S4键按下处理...P1OUT ^=BIT0;}break;default:{P1OUT ^=BIT0;} break;}}}}//***************************************************************************** *//调试成功，自发自收，发0x55，波特率1200bps，格式为：起始位＋d0+d1+d2+d3+d4+d5+d6+d7 共８位// Baud rate divider with 32768Hz = 32768Hz/1200 = ~27.31 32768/1200=27.31// ACLK =32768HZ//// MSP430F149// -----------------// /|\| XIN|-// | | |// --|RST XOUT|-// | |// | P3.4/UCA0TXD|------------>// | | 1200 - 8N1// | P3.5/UCA0RXD|<------------////***************************************************************************** *#include "msp430x14x.h"void main(void){ unsigned char revbuf;WDTCTL = WDTPW + WDTHOLD; // Stop WDTP3SEL = 0x30; // P3.4,5 = USCI_A0 TXD/RXDUTCTL0 |= SSEL0; // ACLKUBR00 = 0x1b; // 32768Hz 1200; (27.31)decimal = 1bh UBR10 = 0; // 32768Hz 1200UMCTL0 = 0x03; // Modulation UCBRSx = 1U0CTL |=CHAR+PENA+SPB; //发送字节U0ME |= UTXE0+URXE0;U0CTL &= ~SWRST; // **Initialize USCI state machine**IE1 |= URXIE0; // Enable USCI_A0 RX interruptU0TXBUF =0x55;while(1){__bis_SR_register(LPM0_bits + GIE); // Enter LPM0, interrupts enabledrevbuf=U0RXBUF;revbuf=U0RXBUF;}}void delay(unsigned char t) //150 us{unsigned char i,j;for(i=0;i<t;i++)for(j=0;j<30;j++){;}}// Echo back RXed character, confirm TX buffer is ready first#pragma vector=USART0RX_VECTOR__interrupt void USART0RX_ISR(void){while (!(IFG1&UTXIFG0)); // USCI_A0 TX buffer ready?U0TXBUF = U0RXBUF; // TX -> RXed characterdelay(80);}定时不十分准确,与DCO频率不精确有关，需要根据实际时钟频率计算，如果需要精确定时，可使用外接高稳定度的晶振#include "msp430x14x.h" //TAunsigned int const10ms=0 ;void PortInit(){P1DIR |=BIT0; // P1.0 LED}void timerA_Init() //定时1ms{TACTL=TASSEL_2+TACLR; //定时器A时钟源为SMCLK,并清TAR,关溢出中断TAIE=0TACCR0 =8000;// //计数值为8000个SMCLK周期(8M SMCLK时钟,若定时1ms，则TBCCR0初值为1000/(1/8)=8000)TACCTL0 &=~CCIE; //CCR0中断禁止}void main(void){WDTCTL=WDTPW+WDTHOLD; //关看门狗}//XT2调试成功: 450kHz ~ 8MHz，该程序未调试,仅供参考。

//************************************************************************* *****//// MSP430x149// -----------------// /|\| XIN|-// | | | 32KHz// --|RST XOUT|-// | |// | XT2IN|-// | | 8.00355MHz// | XT2OUT|-// | |// | P1.0|-->LED// | P5.4/MCLK|-->MCLK = XT2 HFXTAL////************************************************************************* *****#include <msp430x14x.h>unsigned char const10ms=0;void sys_Init(){ unsigned char i;WDTCTL = WDTPW+WDTHOLD; // Stop WDTBCSCTL1 &= ~XT2OFF; // Activate XT2 high freq xtaldo{IFG1 &= ~OFIFG; // Clear OSCFault flagfor (i = 0x47FF; i > 0; i--); // Time for flag to set}while ((IFG1 & OFIFG)); // OSCFault flag still set?BCSCTL2 |= SELM_2+SELS; // ***MCLK = XT2 HF XTAL (safe) ****SMCLK= XT2 HF XTAL******P1DIR |=BIT0;}void timerA_Init() //定时1ms{TACTL=TASSEL_2+TACLR; //定时器A时钟源为SMCLK,并清TAR,关溢出中断TAIE=0TACCR0 =8000;//298; //计数值为8000个SMCLK周期(8M SMCLK时钟,若定时1ms，则TBCCR0初值为1000/(1/8)=8000)TACCTL0 |=CCIE; //CCR0中断使能}#pragma vector = TIMERA0_VECTOR //ccr0中断服务__interrupt void ta0_isr(void){unsigned long x;const10ms++;if(const10ms==2) //2ms到则取反//（实际1分钟闪烁94次）{ P1OUT ^= 0x01;const10ms=0;}TACCR0+=8000;}void main(void){volatile unsigned int i;sys_Init();timerA_Init();TACTL |=MC1; //连续模式_BIS_SR(CPUOFF+GIE);}此程序为位移测量程序，涉及到AD转换、按键、LCD显示器、产生PWM波形、定时器定时等内容。

程序基于MSP430F247完成，调试成功，pwm模块程序可以参考msp430x24x_tb_10.C （多路PWM）#include "msp430x24x.h"#include "lcd.h"// 使用P1.4 、P1.5、P1.6、P1.7作为键盘口// 按键使用说明：S1: 步进+；S2：步进-；S4：确认后启动电机//#define STD 2000 //-20.00mm --- +20.00mm#define K1 -3.1904#define B1 8359.5#define K2 -5.2092#define B2 9858.5#define K3 -2.4068#define B3 1920.9unsigned int D = 5115;unsigned char dsign=0; //D的符号unsigned int currstd=1330; //当前位移，显示在第三行0x8cunsigned char currsign=0; //当前位移的符号unsigned int jddistance;unsigned int setstd=0x00; //设置值，显示在第四行0x9bunsigned char setdsign=0; //设置值的符号unsigned int setjddistance=2000; //设置的绝对位移unsigned long daccx,daccy=0; //采样值累加平均unsigned int const500ms=0 ; //500ms累加unsigned char motorstartup=0; //步进电机启动停止控制unsigned char fororback=0; //前进0或后退1 全局变量unsigned int motorspeed;unsigned char endflag=0; //定位unsigned char mode=0;void motor_Init(){CCR0 = 512-1; // PWM Period 64HZCCTL1 = OUTMOD_7; // CCR1 reset/setCCR1 = 400; // CCR1 PWM duty cycle 实验结果，由于与非门反相，脉宽越大电机越慢P2OUT &=~BIT2;}void motor_startup(){TACTL = TASSEL_1 + MC_1;}void motor_ctl(unsigned int speed,unsigned char dir){CCR1 = speed;if(dir==0) //电机正转：{ P1OUT &=~BIT0; //P1.0输出低}else //电机反转：{ P1OUT |=BIT0; //P1.0输出高}}void timerB_Init() //定时1ms{TBCTL=TBSSEL_2+TBCLR; //定时器A时钟源为SMCLK,并清TAR,关溢出中断TAIE=0TBCCR0 =16000; //298; //计数值为16000个SMCLK周期TBCCTL0 |=CCIE; //CCR0中断使能}void AD_INI(void) //ADS7818初始化{UCA0CTL1 |=UCSSEL1; //时钟源选择SMCLK,1MHZ DCOCLKUCA0CTL0 |=UCMST+UCSYNC+UCCKPL+UCMSB;//spi主机模式,spi通讯,时钟极性选为高电平无效,选择最高有效位先发UCA0BR1=0; //1000000/1=1000000UCA0BR0=2;UCA0MCTL=0;}unsigned int AD_TRANSF(void) //启动一次AD转换，返回12位AD 转换值{ unsigned int n;unsigned int rec_data16=0;UCA0CTL1 &=~UCSWRST; //进入SPI工作模式P3OUT|=BIT1;for(n=10;n>0;n--);P3OUT&=~BIT1;UCA0TXBUF=0; //主机首先发一帧,发1MHZ时钟while(!(UCA0RXIFG&IFG2)); //查询接收标志位IFG2&=~UCA0RXIFG;rec_data16=UCA0RXBUF; //将收到的高8位数据放入rec_data16 rec_data16<<=8; //最高位始终为0UCA0TXBUF=0; //发1MHZ时钟while(!(UCA0RXIFG&IFG2)); //查询接收标志位IFG2&=~UCA0RXIFG;rec_data16=rec_data16+UCA0RXBUF; //将收到的低8位数据放入rec_data16 rec_data16>>=3; //获取12位数据P3OUT|=BIT1;return (rec_data16);}unsigned int AD2_TRANSF(void) //启动一次AD转换，返回12位AD转换值{ unsigned int n;unsigned int rec_data16=0;UCA0CTL1 &=~UCSWRST; //进入SPI工作模式P2OUT|=BIT1;for(n=10;n>0;n--);P2OUT&=~BIT1;UCA0TXBUF=0; //主机首先发一帧,发1MHZ时钟while(!(UCA0RXIFG&IFG2)); //查询接收标志位IFG2&=~UCA0RXIFG;rec_data16=UCA0RXBUF; //将收到的高8位数据放入rec_data16 rec_data16<<=8; //最高位始终为0UCA0TXBUF=0; //发1MHZ时钟while(!(UCA0RXIFG&IFG2)); //查询接收标志位IFG2&=~UCA0RXIFG;rec_data16=rec_data16+UCA0RXBUF; //将收到的低8位数据放入rec_data16 rec_data16>>=3; //获取12位数据P2OUT|=BIT1;return (rec_data16);}#pragma vector = TIMERB0_VECTOR //1ms中断__interrupt void ta0_isr(void){float floatx;const500ms++;daccx+=AD_TRANSF(); //整形转长整形，以0.01mm为基本单位daccy+=AD2_TRANSF();if(const500ms%20==0){ daccx=daccx/20;daccy=daccy/20;if(daccx>daccy){dsign=0;D=(daccx-daccy)*10000/(daccx+daccy); }else if(daccx<daccy){dsign=1;D=(daccy-daccx)*10000/(daccx+daccy); }else {dsign=0,D=0;}daccx=0;daccy=0;/* 由D值得到currstd和currsign*//*首先按公式计算计算绝对位移*/floatx=D;if(dsign==0){if(D>=6400){jddistance=(D-B1)/K1;}else {jddistance=(D-B2)/K2;}}else{if(D>=4948){jddistance=(D+B3)/(-K3);}else{jddistance=(D+B2)/(-K2);}}/*由绝对位移确定currsign,currstd，以便显示*/if(jddistance>=2000){currsign=0;currstd=jddistance-2000;}else {currsign=1;currstd=2000-jddistance;}/*控制直流电机*/if(motorstartup!=0) //若电机开{if((((jddistance-setjddistance)<10)||((setjddistance-jddistance)<10))){// motor_ctl(500,0);// motor_ctl(500,1);P1SEL &=~0x04; //P1.2=0P1OUT |= 0x04;TACTL &= 0xcf;motorstartup=0x00;endflag=~endflag;P2OUT |=BIT2;}else{if(jddistance<=setjddistance){fororback=0x00;}else {fororback=~0x00;}if(((jddistance-setjddistance)<400)||((setjddistance-jddistance)<400)){if(fororback==0x00){motor speed=450;}else{motorspeed=420;}} //速度很慢else{if(fororback==0x00){motorspeed=400;} else{motorspeed=320;}} ////________motor_ctl(motorspeed,fororback);}}}if(const500ms==500) //100ms刷新显示{ diplyamp(mode);diplyamp2(dsign,D,0x94); //显示D值diplyamp1(currsign,currstd,0x8c); //显示当前位移diplyamp1(setdsign,setstd,0x9c); //显示设置位移const500ms=0;}TBCCR0+=16000;}void main(void){WDTCTL=WDTPW+WDTHOLD; //关看门狗BCSCTL1 =CALBC1_16MHZ; //设定DCO为16MHZDCOCTL =CALDCO_16MHZ;PortInit();AD_INI();LCDInit(); //初始化LCD屏Test(); //显示文本diplyamp(0); //显示位移测量仪diplyamp2(dsign,D,0x94); //显示D值diplyamp1(currsign,currstd,0x8c); //显示当前位移diplyamp1(setdsign,setstd,0x9c); //显示设置位移timerB_Init();motor_Init();TBCTL |=MC1; //开采样定时器TIMERB，基本时间1ms_BIS_SR(GIE);while(1){ while((P1IN&0xf0)==0xf0){if(endflag!=0x00){delay(30000);P2OUT &=~BIT2;endflag=~endflag;}}delay(30000); //去抖if((P1IN&0xf0)!=0xf0){switch (P1IN&0xf0){case 0xe0: // S1 设置目标位移，步进+{ if(mode==0x00){if(setdsign==0){setstd+=10; if(setstd>STD){setstd-=10;}setjddistance=setstd+2000; }else{setstd-=10; if(setstd==0){setdsign=0;}setjddistance=2000-setstd;}}else{P1SEL |= 0x04; //P1.2启用第2功能，产生PWM波motor_startup();motor_ctl(350,0);while((P1IN&0xf0)==0xe0); //等待按键释放P1SEL &=~0x04; //P1.2=0P1OUT |= 0x04;TACTL &= 0xcf;}}break;case 0xd0: //S2 设置目标位移，步进-{if(mode==0x00){if(setdsign==0){ if(setstd==0){setstd=10;setdsign=1;}else{setstd-=10;}setjddistance=setstd+2000; }else { setstd+=10; if(setstd>STD){setstd-=10;}setjddistance=2000-setstd;}}else{P1SEL |= 0x04; //P1.2=0motor_startup();motor_ctl(350,1);while((P1IN&0xf0)==0xd0);P1SEL &=~0x04; //P1.2=0P1OUT |= 0x04;TACTL &= 0xcf;}}break;case 0xb0: //S3{mode=~mode;if(mode!=0x00){P1SEL |= 0x04; //P1.2=0motor_startup();motor_ctl(500,0);}else{ P1SEL &=~0x04; //P1.2=0P1OUT |= 0x04;TACTL &= 0xcf; }}break;case 0x70: //S4 确认键按下后，电机准备启动{if(mode==0x00){if((((jddistance-setjddistance)<10)||((setjddistance-jddistance)<10))) { motorstartup=0x00; P1SEL &=~0x04; //P1.2=0P1OUT |= 0x04;}else {motorstartup=0xff;P1SEL |=0x04; //P1.2=1motor_startup();}}else{}}break;default:{ }break;}}}}。