Question

求一个cc2530 超声波模块测距的程序

Answer 1

#ifndef ULTRASOUND_H
#define ULTRASOUND_H

#define uchar unsigned char
#define uint unsigned int

#define TRIG P1_3 //P1_2
#define ECHO P0_7 //P0_1

extern uchar RG;
extern uchar H1;
extern uchar L1;
extern uchar H2;
extern uchar L2;
extern uchar H3;
extern uchar L3;
extern uint data;
extern float distance;
extern uchar LoadRegBuf[4];

//void Delay(uint n);
void Delay_1us(uint microSecs);
void Delay_10us(uint n);
void Delay_1s(uint n);
void SysClkSet32M();
void Init_UltrasoundRanging();
void UltrasoundRanging(uchar *ulLoadBufPtr);
__interrupt void P0_ISR(void);
#endif

×××××××××××××××××××××××××××××××××××××××××××
//×××××××××××Ultrasound.c****************************
#include <ioCC2530.h>
#include "Ultrasound.h"

uchar RG;
uchar H1;
uchar L1;
uchar H2;
uchar L2;
uchar H3;
uchar L3;
uint data;
float distance;

uchar LoadRegBuf[4];//全局数据，用以存储定时计数器的值。

void Delay_1us(uint microSecs)
{ while(microSecs--)
{ /* 32 NOPs == 1 usecs 因为延时还有计算的缘故，用了31个nop*/
asm("nop"); asm("nop"); asm("nop"); asm("nop"); asm("nop");
asm("nop"); asm("nop"); asm("nop"); asm("nop"); asm("nop");
asm("nop"); asm("nop"); asm("nop"); asm("nop"); asm("nop");
asm("nop"); asm("nop"); asm("nop"); asm("nop"); asm("nop");
asm("nop"); asm("nop"); asm("nop"); asm("nop"); asm("nop");
asm("nop"); asm("nop"); asm("nop"); asm("nop"); asm("nop");
asm("nop");
}
}

void Delay_10us(uint n)
{ /* 320NOPs == 10usecs 因为延时还有计算的缘故，用了310个nop*/
uint tt,yy;
for(tt = 0;tt<n;tt++);
for(yy = 310;yy>0;yy--);
{asm("NOP");}
}

void Delay_1s(uint n)
{ uint ulloop=1000;
uint tt;
for(tt =n ;tt>0;tt--);
for( ulloop=1000;ulloop>0;ulloop--)
{
Delay_10us(100);
}

}

void SysClkSet32M()
{
CLKCONCMD &= ~0x40; //设置系统时钟源为32MHZ晶振
while(CLKCONSTA & 0x40); //等待晶振稳定
CLKCONCMD &= ~0x47; //设置系统主时钟频率为32MHZ
//此时的CLKCONSTA为0x88。即普通时钟和定时器时钟都是32M。
}

void Init_UltrasoundRanging()
{
P1DIR = 0x08; //0为输入1为输出 00001000 设置TRIG P1_3为输出模式
TRIG=0; //将TRIG 设置为低电平

P0INP &= ~0x80; //有上拉、下拉 有初始化的左右
P0IEN |= 0x80; //P0_7 中断使能
PICTL |= 0x01; //设置P0_7引脚，下降沿触发中断
IEN1 |= 0x20; // P0IE = 1;
P0IFG = 0;

}

void UltrasoundRanging(uchar *ulLoadBufPtr)
{
SysClkSet32M();
Init_UltrasoundRanging();
EA = 0;
TRIG =1;

Delay_1us(10); //需要延时10us以上的高电平
TRIG =0;

T1CNTL=0;
T1CNTH=0;

while(!ECHO);
T1CTL = 0x09; //通道0,中断有效,32分频;自动重装模式(0x0000->0xffff);
L1=T1CNTL;
H1=T1CNTH;
*ulLoadBufPtr++=T1CNTL;
*ulLoadBufPtr++=T1CNTH;
EA = 1;
Delay_10us(60000);
Delay_10us(60000);

}

#pragma vector = P0INT_VECTOR
__interrupt void P0_ISR(void)
{
EA=0;
T1CTL = 0x00;
LoadRegBuf[2]=T1CNTL;
LoadRegBuf[3]=T1CNTH;
L2=T1CNTL;
H2=T1CNTH;

if(P0IFG&0x080) //外部ECHO反馈信号
{
P0IFG = 0;
}
T1CTL = 0x09;
T1CNTL=0;
T1CNTH=0;
P0IF = 0; //清中断标志
EA=1;
}

××××××××××××××××××××××××××××××××××××××
#include <ioCC2530.h>
#include "Ultrasound.h"

void main(void)
{

while(1)
{

UltrasoundRanging(LoadRegBuf);
Delay_1s(1);
data=256*H2+L2-L1-256*H1;
distance=(float)data*340/10000;
Delay_1s(2);
};
}

Answer 2

没有硬件，没有技术要求，别人实在没有办法给你做的。再说这种东西，还是自己做好些。