單片機自行車測速系統的設計 12232液晶顯示

ID:419294 · 發表于 2018-11-22 18:47

主要測量速度、里程、行駛時間及溫度。利用的是STC89C52、霍爾傳感器、矩陣鍵盤。

電路原理圖如下：

單片機源程序：

#include <REGX52.H>
#include "12232.h"
#include "stc_eep.h"
sbit LCD_bk = P2^4;
sbit KEY1 = P1^3;
sbit KEY2 = P1^4;
sbit KEY3 = P1^5;
volatile unsigned int t_counter=0;
volatile unsigned char int_flag=0,t0_flag=0;
void t0_srv(void) interrupt 1 using 1
{
TR0 = 0;
ET0 = 0;
t_counter++;
t0_flag = 1;
if(t_counter<5)
{
IE0 = 0;
}
if(t_counter==5)
{
EX0 = 1; //50ms后開int0中斷, 防抖動.
}
TH0 = 216; //(65536-10000)/256
//TL0 = 240; //(65536-10000)%256
TL0 = 255;
TR0 = 1;
ET0 = 1;
}
void int0_srv(void) interrupt 0 using 0
{
EX0 = 0;
int_flag = 1;
}
void delay_nms(unsigned int count)
{
unsigned int i,j;
for(i=0;i<count;i++)
for(j=0;j<45;j++);
}
void main(void)
{
unsigned char buff[]=(" 0.000km");
unsigned char buff_2[]=(" 000.0km");
unsigned char buff_1[]=("11");
unsigned char sec=0,min=0,hour=0,counter=0;
unsigned char time_buff[]=("00:00:00");
unsigned int temp=0;
unsigned int speed=0;
unsigned int once_counter=0; //單次騎行計數
unsigned char all_counter_1,all_counter_2,all_counter_3;
unsigned long all_counter=0,temp1=0;
EA = 0;
IT0 = 1; //int0 下降沿中斷
EX0 = 1; //允許外部中斷0
TMOD = 0x09; //timer0 工作方式1 10ms溢出
TH0 = 216; //(65536-10000)/256
TL0 = 240; //(65536-10000)%256
TR0 = 1;
ET0 = 1;
EA = 1;
LCD_init();
LCD_bk = 0;
clrscr(0x00);
//drawascii(10,0,"speed meater v0.1");
//----------------------------------------------
//--大字符顯示格式------------------------------
//*
draw_very_big_ascii(0,"12");
draw_big_ascii(47,2,".3");
drawascii(73,3," KM/H");
drawascii(73,0,"00.000km");
drawascii(73,1,"0000.0km");
drawascii(73,2,"00:00:00");
//*/
//----------------------------------------------
//--小字符顯示格式------------------------------
/*
drawascii(0,0,"SPD 12.3KM/H");
drawascii(48,0," KM/H");
drawascii(0,2,"max 29.8 | avg 13.2 ");
drawascii(0,3,"12.345KM | 1234.56KM");
*/
//STC_BYTE_program(0x20,0x20,0x1f);
// if(STC_BYTE_read(0x20,0x20)==0x1f)
// P1=0xf0;
/*
STC_SECTOR_erase(0x20,0x00);
STC_BYTE_program(0x20,0x21,00);
STC_BYTE_program(0x20,0x22,00);
STC_BYTE_program(0x20,0x23,00);
*/
if((KEY1 == 0)&&(KEY2 == 0))
{
delay_nms(20);
if((KEY1 == 0)&&(KEY2 == 0))
{
drawascii(73,3,"CLEAR");
while((KEY1 == 0)&&(KEY2 == 0));
STC_SECTOR_erase(0x20,0x00);
STC_BYTE_program(0x20,0x21,0);
STC_BYTE_program(0x20,0x22,0);
STC_BYTE_program(0x20,0x23,0);
delay_nms(4000);
drawascii(73,3," KM/H ");
}
}
all_counter_1 = STC_BYTE_read(0x20,0x21);
all_counter_2 = STC_BYTE_read(0x20,0x22);
all_counter_3 = STC_BYTE_read(0x20,0x23);
all_counter = (unsigned long)all_counter_1<<16 | (unsigned long)all_counter_2<<8 | (unsigned long)all_counter_3 ;
temp1 = all_counter *2;
buff_2[0] = temp1/1000000 + '0';
buff_2[1] = temp1%1000000/100000 + '0';
buff_2[2] = temp1%100000/10000 + '0';
buff_2[3] = temp1%10000/1000 + '0';
buff_2[5] = temp1%1000/100 + '0';
drawascii(73,1,buff_2);
while(1)
{
if(t0_flag == 1)
{
t0_flag = 0;
counter++;
if(counter == 100)
{
counter = 0;
sec ++;
if(sec == 60)
{
sec = 0;
min ++;
if(min == 60)
{
min = 0;
hour ++;
}
}
time_buff[0]=hour/10+'0';
time_buff[1]=hour%10+'0';
time_buff[3]=min/10+'0';
time_buff[4]=min%10+'0';
time_buff[6]=sec/10+'0';
time_buff[7]=sec%10+'0';
drawascii(73,2,time_buff);
}
}
if(t_counter>1000)
{
t_counter = 0;
//drawascii(0,1,"time out");
}
if(KEY3 == 0)
{
delay_nms(20);
if(KEY3 == 0)
{
while(KEY3==0);
LCD_bk = !LCD_bk;
}
}
if(KEY1 == 0)
{
delay_nms(20);
if(KEY1 == 0)
{
while(KEY1==0);
drawascii(73,3,"WRITED");
STC_SECTOR_erase(0x20,0x00);
STC_BYTE_program(0x20,0x21,(unsigned char)all_counter>>16);
STC_BYTE_program(0x20,0x22,(unsigned char)all_counter>>8);
STC_BYTE_program(0x20,0x23,(unsigned char)all_counter);
delay_nms(2000);
drawascii(73,3," KM/H ");
}
}
if(int_flag==1)
{
int_flag = 0;
temp = t_counter;
t_counter = 0;
/*
buff[0] = temp/1000 + '0';
buff[1] = temp%1000/100 + '0';
buff[2] = temp%100/10 + '0';
buff[3] = temp%10 + '0';
//drawascii(0,1,buff);
*/
speed = 7351/temp; //顯示速度
buff_1[0] = speed/100 + '0';
buff_1[1] = speed%100/10 + '0';
draw_very_big_ascii(0,buff_1);
buff_1[0] = '.';
buff_1[1] = speed%10 + '0';
draw_big_ascii(47,2,buff_1);
once_counter++;
all_counter++; //顯示距離
temp = (unsigned long)once_counter * 2040 /1000; //輪胎周長2040mm
buff[0] = temp/10000 + '0';
buff[1] = temp%10000/1000 + '0';
buff[3] = temp%1000/100 + '0';
buff[4] = temp%100/10 + '0';
buff[5] = temp%10 + '0';
drawascii(73,0,buff);
temp1 = all_counter *2;
buff_2[0] = temp1/1000000 + '0';
buff_2[1] = temp1%1000000/100000 + '0';
buff_2[2] = temp1%100000/10000 + '0';
buff_2[3] = temp1%10000/1000 + '0';
buff_2[5] = temp1%1000/100 + '0';
drawascii(73,1,buff_2);
}
}
}