msp430超声波测距程序.doc

#include msp430x14x.h #include 1602.c #define uint unsigned int #define uchar unsigned char void USARTinit(); void timeinit(); long static uint distance=0; uchar table[]=gu zhuanyuan; /*void delay(uint y) { uint x; for(;y0;y--) for(x=100;x0;x--); }*/ uchar i=0,j=0; void main( ) { // Stop watchdog timer to prevent time out reset WDTCTL = WDTPW + WDTHOLD; // USARTinit(); P1DIR|=BIT0; P2DIR=0XFF; timeinit(); lcdinit(); display_string(3,1,table); P1IE=BIT1; P1IES=~BIT1; while(1) { P1OUT|=BIT0; delay(1); P1OUT=~BIT0; delay(1000); display_one(1,0,(distance/10000)%10+0x30); display_one(2,0,(distance/1000)%10+0x30); display_one(3,0,(distance/100)%10+0x30); display_one(4,0,(distance/10)%10+0x30); display_one(5,0,distance%10+0x30); } } void timeinit() { TACTL=TASSEL_2+ID_3+MC_1;//ID_2表示八分频！ MC_1表示连续计数模式！ BCSCTL2=0x88;//选择SMCLK的信号源XT2CLK（8MHz） CCR0=65535; _EINT(); //打开总中断！ } #pragma vector=PORT1_VECTOR __interrupt void port1_int(void) { if((P1INBIT1)==BIT1) { TACTL|=MC_1+TACLR; P1IES|=BIT1; } else { TACTL=~MC_3; P1IES=~BIT1; distance=TAR*5/3; P2OUT=TAR; } P1IFG=~BIT1; } #include msp430x14x.h #define uint unsigned int #define uchar unsigned char void lcdinit(); void writecommand(uchar wdata); void writedata(uchar wdata); void delay(uint y); void display_xy(uchar x,uchar y); void display_one(uchar x,uchar y,uchar c); void display_string(uchar x,uchar y,uchar *s); void lcdinit() { P4DIR=0XFF; P3DIR=0xff; delay(1); writecommand(0x38); //必须要有，显示模式设置，设置为16*2显示，5*7点阵，8位数据接口！ // delay(50); writecommand(0x08); //关闭显示,要不要都可以 writecommand(0x01); //显示清屏 writecommand(0x0f); //开显示，显示光标，光标闪烁！！ writecomma