這個(gè)單片機(jī)程序定義沒(méi)怎么看懂，H,M,L沒(méi)懂什么意思，還有就是為什么要乘100000,100...

ID:551568 · 發(fā)表于 2019-6-1 00:50

void READS()
{
      uchar Mileage_H,Mileage_M,Mileage_L;
      delay(10);
      RADIUS=read_add(0x01);
      delay(10);
      SAFE_SPEED=read_add(0x02);

      delay(10);
      Mileage_H=read_add(0x03);
      delay(10);
      Mileage_M=read_add(0x04);
      delay(10);
      Mileage_L=read_add(0x05);

      Mileage=Mileage_H*100000+Mileage_M*1000+Mileage_L*10;
}

//寫(xiě)初值
void SETS()
{
      delay(10);
      write_add(0x01,RADIUS);
      delay(10);
      write_add(0x02,SAFE_SPEED);

/*       Mileage_H=Mileage/10000;                      //123.4560
      Mileage_M=Mileage%10000/100;
      Mileage_L=Mileage%10000%100;       */
      delay(10);
      write_add(0x03,Mileage/100000);
      delay(10);
      write_add(0x04,Mileage%100000/1000);
      delay(10);
      write_add(0x05,Mileage%100000%1000/10);
}
我是一個(gè)單片機(jī)小白，希望各位大佬相助一下，

ID:511890 · 發(fā)表于 2019-6-1 03:59

程序不全。不知道為啥要這樣做，可能和讀取的位數(shù)有關(guān)，每次只能read_add兩個(gè)字符。按照你給的代碼。uchar應(yīng)該是unsigned char類型。范圍為0~255的整數(shù)。而Mileage最大值應(yīng)該是一個(gè)6-7位數(shù)以上的數(shù)，超出了unsigned char范圍。因此，Mileage_H表示第6位以上的數(shù)，Mileage_M表示第4位第5位，Mileage_L表示第2位第3位。

ID:552248 · 發(fā)表于 2019-6-1 07:28

從void SETS()可以看出，這是個(gè)用整形數(shù)據(jù)來(lái)處理浮點(diǎn)類型數(shù)據(jù)的函數(shù)， Mileage=Mileage_H*100000+Mileage_M*1000+Mileage_L*10;Mileage是最終浮點(diǎn)數(shù)據(jù)值用整形存儲(chǔ)的變量值，Mileage_H*100000是高位擴(kuò)大100000倍作為記錄單元，其它*1000同理

ID:330198 · 發(fā)表于 2019-6-1 09:20

你這個(gè)估計(jì)是把數(shù)據(jù)存在EEPROM中的，乘100000是為了變成整數(shù)，好把每一位數(shù)值取出來(lái)單獨(dú)保存。

ID:160500 · 發(fā)表于 2019-6-1 10:49

H、M、L是高中低三個(gè)位段的數(shù)，乘100000,1000，10是分別擴(kuò)大這么多倍的和賦值給Mileage。為什么要乘因?yàn)榘言瓉?lái)的數(shù)分開(kāi)時(shí)縮小了這么多的倍，恢復(fù)自然要再乘回來(lái)

ID:551568 · 發(fā)表于 2019-6-1 14:01

幻劍心發(fā)表于 2019-6-1 03:59
程序不全。不知道為啥要這樣做，可能和讀取的位數(shù)有關(guān)，每次只能read_add兩個(gè)字符。按照你給的代碼。uchar ...

那我可以把全部程序發(fā)給你看一下嗎就這里不怎么懂什么意思你的評(píng)論我覺(jué)得挺好的但是好像有什么24小時(shí)評(píng)分限制我明天再給評(píng)分謝謝了希望能回復(fù)一下實(shí)在是單片機(jī)小白想學(xué)習(xí)一下很多不懂的

ID:511890 · 發(fā)表于 2019-6-1 16:30

我的國(guó)兒發(fā)表于 2019-6-1 14:01
那我可以把全部程序發(fā)給你看一下嗎就這里不怎么懂什么意思你的評(píng)論我覺(jué)得挺好的但是好像有什么24 ...

可以，不過(guò)要晚上才有時(shí)間了。

ID:551568 · 發(fā)表于 2019-6-1 17:16

幻劍心發(fā)表于 2019-6-1 16:30
可以，不過(guò)要晚上才有時(shí)間了。

#include<reg52.h> //調(diào)用單片機(jī)頭文件
#include "DS18B20.h"
#include <stdio.h>
#define uchar unsigned char //無(wú)符號(hào)字符型宏定義變量范圍0~255
#define uint unsigned int //無(wú)符號(hào)整型宏定義變量范圍0~65535
#include "Data.h"
#include "DS1302.h"
#include "AT24C02.h"
sbit COUNT_IN=P3^2; //脈沖輸入端口
//定義1602相關(guān)管腳
sbit rs=P1^4; //寄存器選擇信號(hào) H：數(shù)據(jù) L:指令
sbit en=P1^0; //片選信號(hào) 下降沿觸發(fā)
//鍵盤(pán)定義
sbit K1=P3^4; //設(shè)置時(shí)間
sbit K3=P3^6; //減按鍵
sbit K2=P3^5; //加按鍵
sbit K4=P3^7; //設(shè)置半徑安全距離
sbit BEEP=P3^0; //蜂鳴器外接端口
uint count;
unsigned long Velocity,Mileage;
uchar code tab1[]={" / / : "}; //時(shí)間年月日時(shí) 分星期
uchar code tab2[]={" 0.000km 00 "}; //里程速度
uchar code tab3[]={"Wheel Radius cm"}; // 半徑
uchar code tab4[]={"Safe Speed km/h"}; // 安全速度
uchar code tab5[]={"Sec : "}; // 在按鍵設(shè)置的時(shí)候會(huì)顯示秒
uchar Display_Buff[30]; //顯示
uchar Mode=0;
uchar bike_set=0;
uchar a;
char RADIUS,SAFE_SPEED;
bit LED_SEC;
uchar before_sec;
//自定義字符RAM
uchar code num[]={
0x04,0x04,0x04,0x04,0x04,0x04,0x04,0x00,//1
0x1f,0x01,0x01,0x1f,0x10,0x10,0x1f,0x00,//2
0x1f,0x01,0x01,0x1f,0x01,0x01,0x1f,0x00,//3
0x11,0x11,0x11,0x1f,0x01,0x01,0x01,0x00,//4
0x1f,0x10,0x10,0x1f,0x01,0x01,0x1f,0x00,//5
0x1f,0x10,0x10,0x1f,0x11,0x11,0x1f,0x00,//6
0x1f,0x01,0x01,0x01,0x01,0x01,0x01,0x00,//7 顯示星期依次為周一到周日
};
void READS();
void SETS();
void delay(uint x)
{
uint i,j;
for(i=0;i<x;i++)
for(j=0;j<110;j++);
}
void init()
{
IT0=1; //INT0負(fù)跳變觸發(fā)
TMOD=0x01;//定時(shí)器工作于方式1
TH0=0x3c; //50ms
TL0=0xb0;
EA=1; //CPU開(kāi)中斷總允許
ET0=1;//開(kāi)定時(shí)中斷
EX0=1;//開(kāi)外部INTO中斷
TR0=1;//啟動(dòng)定時(shí)
}
/********液晶寫(xiě)入指令函數(shù)與寫(xiě)入數(shù)據(jù)函數(shù)，以后可調(diào)用**************/
void write_1602com(uchar com)//****液晶寫(xiě)入指令函數(shù)****
{
rs=0;//把寄存器置為指令
P0=com;//送入數(shù)據(jù)
delay(1);
en=1;//拉高使能端，為制造有效的下降沿做準(zhǔn)備
delay(1);
en=0;//en由高變低，產(chǎn)生下降沿，液晶執(zhí)行命令
}
void write_1602dat(uchar dat)//***液晶寫(xiě)入數(shù)據(jù)函數(shù)****
{
rs=1;//把寄存器置為數(shù)據(jù)
P0=dat;//送入數(shù)據(jù)
delay(1);
en=1; //en置高電平，為制造下降沿做準(zhǔn)備
delay(1);
en=0; //en由高變低，產(chǎn)生下降沿，液晶執(zhí)行命令
}
void write_1602_Str(uchar *Str)
{
uchar i = 0;
while (Str[i])
{
write_1602dat(Str[i++]);
}
}
//自定義字符集
void Lcd_ram() // 液晶寫(xiě)數(shù)據(jù)。
{
uchar i,j,k=0;
uchar temp=0x40;//設(shè)定CGRAM地址指令01000000（DB5~DB0含義)
for(i=0;i<7;i++) //自定義7個(gè)字符
{
for(j=0;j<8;j++)
{
write_1602com(temp+j);
write_1602dat(num[k]); //分別寫(xiě)入CGRAM的字模
k++;
}
temp=temp+8;
}
}
void lcd_init()//***液晶初始化函數(shù)****
{
Lcd_ram();
write_1602com(0x38);//設(shè)置液晶8位數(shù)據(jù)工作模式，2行，5×7
write_1602com(0x0c);//整體顯示、開(kāi)光標(biāo)、不閃爍
write_1602com(0x06);//設(shè)定輸入方式屏不移位
write_1602com(0x01);//清除屏幕顯示
write_1602com(0x80);//顯示固定符號(hào)從第一行第1個(gè)位置之后開(kāi)始顯示
for(a=0;a<16;a++)
{
write_1602dat(tab1[a]);//向液晶屏寫(xiě)固定符號(hào)部分
}
write_1602com(0x80+0x40);//顯示固定符號(hào)寫(xiě)入位置，從第2個(gè)位置后開(kāi)始顯示
for(a=0;a<16;a++)
{
write_1602dat(tab2[a]);//寫(xiě)顯示固定符號(hào)
}
}
void display() //液晶顯示部分
{
if(Mode==0&&bike_set==0)
{
//讀時(shí)間
Ds1302_Read_Time();
//顯示時(shí)間
write_1602com(0x80);
write_1602dat(0x30+time_buf1[1]/10); //顯示設(shè)置
write_1602dat(0x30+time_buf1[1]%10);
write_1602com(0x80+3);
write_1602dat(0x30+time_buf1[2]/10);
write_1602dat(0x30+time_buf1[2]%10);
write_1602com(0x80+6);
write_1602dat(0x30+time_buf1[3]/10);
write_1602dat(0x30+time_buf1[3]%10);
write_1602com(0x80+9);
write_1602dat(0x30+time_buf1[4]/10);
write_1602dat(0x30+time_buf1[4]%10);
write_1602com(0x80+12);
write_1602dat(0x30+time_buf1[5]/10);
write_1602dat(0x30+time_buf1[5]%10);
write_1602com(0x80+15);
write_1602dat(time_buf1[7]-1);
if(before_sec!=time_buf1[6])
{
before_sec=time_buf1[6];
write_1602com(0x80+11);
write_1602dat(':');
LED_SEC=1;
}
if(LED_SEC==0)
{
write_1602com(0x80+11);
write_1602dat(' ');
}
write_1602com(0x80+0x40);
if(Mileage/1000000==0)
write_1602dat(' ');
else
write_1602dat(0x30+Mileage/1000000);//數(shù)字+0x30得到該數(shù)字的LCD1602顯示碼
if(Mileage%1000000/100000==0)
write_1602dat(' ');
else
write_1602dat(0x30+Mileage%1000000/100000);//數(shù)字+0x30得到該數(shù)字的LCD1602顯示碼
write_1602dat(0x30+Mileage%1000000%100000/10000);//數(shù)字+0x30得到該數(shù)字的LCD1602顯示碼
write_1602com(0x80+0x40+4);
write_1602dat(0x30+Mileage%1000000%100000%10000/1000);//數(shù)字+30得到該數(shù)字的LCD1602顯示碼
write_1602dat(0x30+Mileage%1000000%100000%10000%1000/100);//數(shù)字+30得到該數(shù)字的LCD1602顯示碼
write_1602dat(0x30+Mileage%1000000%100000%10000%1000%100/10);//數(shù)字+30得到該數(shù)字的LCD1602顯示碼
SETS();
write_1602com(0x80+0x40+10);
write_1602dat(0x30+Velocity/10);
write_1602dat(0x30+Velocity%10);//數(shù)字+30得到該數(shù)字的LCD1602顯示碼
write_1602com(0x80+0x40+13);
sprintf(Display_Buff, "%dC", Temperature);
write_1602_Str(Display_Buff);
}
else if(Mode!=0)
{
switch(Mode)
{
case 1:
write_1602com(0x80+0x40);//顯示固定符號(hào)寫(xiě)入位置
for(a=0;a<16;a++)
{
write_1602dat(tab5[a]);//寫(xiě)顯示固定符號(hào)
}
write_1602com(0x80+0x40+14);
write_1602dat(0x30+time_buf1[6]/10);
write_1602dat(0x30+time_buf1[6]%10);
write_1602com(0x0F); //打開(kāi)閃爍
write_1602com(0x80+1);
break;
case 2:
write_1602com(0x80+4);
break;
case 3:
write_1602com(0x80+7);
break;
case 4:
write_1602com(0x80+10);
break;
case 5:
write_1602com(0x80+13);
break;
case 6:
write_1602com(0x80+0x40+15);
break;
case 7:
write_1602com(0x80+15);
break;
case 8:
write_1602com(0x0c);
write_1602com(0x80);//顯示固定符號(hào)從第一行第1個(gè)位置之后開(kāi)始顯示
for(a=0;a<16;a++)
{
write_1602dat(tab1[a]);//向液晶屏寫(xiě)固定符號(hào)部分
}
write_1602com(0x80+0x40);//顯示固定符號(hào)寫(xiě)入位置，從第2個(gè)位置后開(kāi)始顯示
for(a=0;a<16;a++)
{
write_1602dat(tab2[a]);//寫(xiě)顯示固定符號(hào)
}
break;
}
}
else if(bike_set!=0)
{
switch(bike_set)
{
case 1:
write_1602com(0x80);//顯示固定符號(hào)寫(xiě)入位置
for(a=0;a<16;a++)
{
write_1602dat(tab3[a]);//寫(xiě)顯示固定符號(hào)
}
write_1602com(0x80+0x40);//顯示固定符號(hào)寫(xiě)入位置
for(a=0;a<16;a++)
{
write_1602dat(tab4[a]);//寫(xiě)顯示固定符號(hào)
}
write_1602com(0x80+12);
write_1602dat(0x30+RADIUS/10); //車輪半徑
write_1602dat(0x30+RADIUS%10);
write_1602com(0x80+0x40+10);
write_1602dat(0x30+SAFE_SPEED/10); //安全速度
write_1602dat(0x30+SAFE_SPEED%10);
write_1602com(0x0F); //打開(kāi)光標(biāo)閃爍
write_1602com(0x80+13);
break;
case 2:
write_1602com(0x80+0x40+11);
break;
case 3:
write_1602com(0x0c);
write_1602com(0x80);//顯示固定符號(hào)從第一行第1個(gè)位置之后開(kāi)始顯示
for(a=0;a<16;a++)
{
write_1602dat(tab1[a]);//向液晶屏寫(xiě)固定符號(hào)部分
}
write_1602com(0x80+0x40);//顯示固定符號(hào)寫(xiě)入位置，從第2個(gè)位置后開(kāi)始顯示
for(a=0;a<16;a++)
{
write_1602dat(tab2[a]);//寫(xiě)顯示固定符號(hào)
}
break;
}
}
}
void KEY()
{
if(bike_set==0&&K1==0) //按鍵部分與蜂鳴器
{
delay(20);
if(bike_set==0&&K1==0)
{
BEEP=0;
delay(50);
BEEP=1;
Mode++;
display();
if(Mode>=8)
{
Mode=0;
Ds1302_Write_Time();
}
}
while(bike_set==0&&K1==0);
}
if(K4==0&&Mode==0)
{
delay(20);
if(K4==0&&Mode==0)
{
BEEP=0;
delay(50);
BEEP=1;
bike_set++;
display();
if(bike_set>=3)
{
bike_set=0;
SETS();
}
}
while(Mode==0&&K4==0);
}
//+
if(K2==0&&(Mode!=0||bike_set!=0))
{
delay(20);
//調(diào)時(shí)
if(K2==0&&(Mode!=0||bike_set!=0))
{
BEEP=0;
delay(50);
BEEP=1;
switch(Mode)
{
case 1:
time_buf1[1]++;
if(time_buf1[1]>=100)
time_buf1[1]=0;
write_1602com(0x80);
write_1602dat(0x30+time_buf1[1]/10);
write_1602dat(0x30+time_buf1[1]%10);
write_1602com(0x80+1);
break;
case 2:
time_buf1[2]++;
if(time_buf1[2]>=13)
time_buf1[2]=1;
write_1602com(0x80+3);
write_1602dat(0x30+time_buf1[2]/10);
write_1602dat(0x30+time_buf1[2]%10);
write_1602com(0x80+4);
break;
case 3:
time_buf1[3]++;
if(time_buf1[3]>=YDay(time_buf1[1],time_buf1[2])+1)
time_buf1[3]=1;
write_1602com(0x80+6);
write_1602dat(0x30+time_buf1[3]/10);
write_1602dat(0x30+time_buf1[3]%10);
write_1602com(0x80+7);
break;
case 4:
time_buf1[4]++;
if(time_buf1[4]>=24)
time_buf1[4]=0;
write_1602com(0x80+9);
write_1602dat(0x30+time_buf1[4]/10);
write_1602dat(0x30+time_buf1[4]%10);
write_1602com(0x80+10);
break;
case 5:
time_buf1[5]++;
if(time_buf1[5]>=60)
time_buf1[5]=0;
write_1602com(0x80+12);
write_1602dat(0x30+time_buf1[5]/10);
write_1602dat(0x30+time_buf1[5]%10);
write_1602com(0x80+13);
break;
case 6:
time_buf1[6]++;
if(time_buf1[6]>=60)
time_buf1[6]=0;
write_1602com(0x80+0x40+14);
write_1602dat(0x30+time_buf1[6]/10);
write_1602dat(0x30+time_buf1[6]%10);
write_1602com(0x80+0x40+15);
break;
case 7:
time_buf1[7]++;
if(time_buf1[7]>=8)
time_buf1[7]=1;
write_1602com(0x80+15);
write_1602dat(time_buf1[7]-1);
write_1602com(0x80+15);
break;
}
switch(bike_set)
{
case 1:
RADIUS++;
if(RADIUS>=71)
RADIUS=0;
write_1602com(0x80+12);
write_1602dat(0x30+RADIUS/10);
write_1602dat(0x30+RADIUS%10);
write_1602com(0x80+13);
break;
case 2:
SAFE_SPEED++;
if(SAFE_SPEED>=100)
SAFE_SPEED=0;
write_1602com(0x80+0x40+10);
write_1602dat(0x30+SAFE_SPEED/10);
write_1602dat(0x30+SAFE_SPEED%10);
write_1602com(0x80+0x40+11);
break;
}
}
while(K2==0);
}
//-
if(K3==0&&(Mode!=0||bike_set!=0))
{
delay(20);
//調(diào)時(shí)
if(K3==0&&(Mode!=0||bike_set!=0))
{
BEEP=0;
delay(50);
BEEP=1;
switch(Mode)
{
case 1:
time_buf1[1]--;
if(time_buf1[1]<0)
time_buf1[1]=99;
write_1602com(0x80);
write_1602dat(0x30+time_buf1[1]/10);
write_1602dat(0x30+time_buf1[1]%10);
write_1602com(0x80+1);
break;
case 2:
time_buf1[2]--;
if(time_buf1[2]<=0)
time_buf1[2]=12;
write_1602com(0x80+3);
write_1602dat(0x30+time_buf1[2]/10);
write_1602dat(0x30+time_buf1[2]%10);
write_1602com(0x80+4);
break;
case 3:
time_buf1[3]--;
if(time_buf1[3]<=0)
time_buf1[3]=YDay(time_buf1[1],time_buf1[2]);
write_1602com(0x80+6);
write_1602dat(0x30+time_buf1[3]/10);
write_1602dat(0x30+time_buf1[3]%10);
write_1602com(0x80+7);
break;
case 4:
time_buf1[4]--;
if(time_buf1[4]<0)
time_buf1[4]=23;
write_1602com(0x80+9);
write_1602dat(0x30+time_buf1[4]/10);
write_1602dat(0x30+time_buf1[4]%10);
write_1602com(0x80+10);
break;
case 5:
time_buf1[5]--;
if(time_buf1[5]<0)
time_buf1[5]=59;
write_1602com(0x80+12);
write_1602dat(0x30+time_buf1[5]/10);
write_1602dat(0x30+time_buf1[5]%10);
write_1602com(0x80+13);
break;
case 6:
time_buf1[6]--;
if(time_buf1[6]<0)
time_buf1[6]=59;
write_1602com(0x80+0x40+14);
write_1602dat(0x30+time_buf1[6]/10);
write_1602dat(0x30+time_buf1[6]%10);
write_1602com(0x80+0x40+15);
break;
case 7:
time_buf1[7]--;
if(time_buf1[7]<1)
time_buf1[7]=7;
write_1602com(0x80+15);
write_1602dat(time_buf1[7]-1);
write_1602com(0x80+15);
break;
}
switch(bike_set)
{
case 1:
RADIUS--;
if(RADIUS<0)
RADIUS=70;
write_1602com(0x80+12);
write_1602dat(0x30+RADIUS/10);
write_1602dat(0x30+RADIUS%10);
write_1602com(0x80+13);
break;
case 2:
SAFE_SPEED--;
if(SAFE_SPEED<0)
SAFE_SPEED=99;
write_1602com(0x80+0x40+10);
write_1602dat(0x30+SAFE_SPEED/10);
write_1602dat(0x30+SAFE_SPEED%10);
write_1602com(0x80+0x40+11);
break;
}
}
while(K3==0);
}
if(K2==0&&K3==0&&Mode==0&bike_set==0)
{
BEEP=0;
delay(100);
BEEP=1;
delay(100);
BEEP=0;
delay(100);
BEEP=1;
delay(100);
Mileage=0;
SETS();
while(K2==0&&K3==0);
}
}
void BJ_SAFE()
{
if(Velocity>SAFE_SPEED)
{
BEEP=0; //蜂鳴器響
}
else
{
BEEP=1; //蜂鳴器不響
}
}
void main()
{
//初始化
Ds1302_Init();
lcd_init();
initeeprom();
//讀取初始參數(shù)
READS();
//定時(shí)器初始化
// InitTimer0();
init();
lcd_init();
before_sec=time_buf1[6];
Temp_Get(); // 第一次采集是錯(cuò)誤數(shù)據(jù)
delay(200);
Temp_Get(); // 第一次采集是錯(cuò)誤數(shù)據(jù)
delay(200);
Temp_Get(); // 第一次采集是錯(cuò)誤數(shù)據(jù)
delay(200);
Temp_Get(); // 第一次采集是錯(cuò)誤數(shù)據(jù)
delay(200);
Temp_Get(); // 第一次采集是錯(cuò)誤數(shù)據(jù)
while(1) //等待定時(shí)器中斷
{
if(Mode==0&&bike_set==0)
{
display();
BJ_SAFE();
}
KEY();
Temp_Handle();
}
}
void EXINT0() interrupt 0
{
count++;
}
void time0() interrupt 1
{
uchar m,n;
TH0=0x3c;
TL0=0xb0; //50ms
m++;
if(LED_SEC==1)
{
n++;
if(n>=10)
{
n=0;
LED_SEC=0;
}
}
if(m>=10)
{
m=0;
Mileage=Mileage+count*2*3.14*RADIUS/20/10;//里程數(shù)mileage=里程+記數(shù)值*輪周長(zhǎng)/脈沖數(shù)/10
Velocity=count*2*3.14*RADIUS/100000*3600*2/20;//總定時(shí)500ms
count=0;
}
} // 處理數(shù)據(jù)，并顯示里程和速度
//讀初值
void READS()
{
uchar Mileage_H,Mileage_M,Mileage_L;
delay(10);
RADIUS=read_add(0x01);
delay(10);
SAFE_SPEED=read_add(0x02);
delay(10);
Mileage_H=read_add(0x03);
delay(10);
Mileage_M=read_add(0x04);
delay(10);
Mileage_L=read_add(0x05);
Mileage=Mileage_H*100000+Mileage_M*1000+Mileage_L*10;
}
//寫(xiě)初值
void SETS()
{
delay(10);
write_add(0x01,RADIUS);
delay(10);
write_add(0x02,SAFE_SPEED);
/* Mileage_H=Mileage/10000; //123.4560
Mileage_M=Mileage%10000/100;
Mileage_L=Mileage%10000%100; */
delay(10);
write_add(0x03,Mileage/100000);
delay(10);
write_add(0x04,Mileage%100000/1000);
delay(10);
write_add(0x05,Mileage%100000%1000/10);
}

復(fù)制代碼

這是主程序，這個(gè)程序主要用來(lái)測(cè)速，用的是光電傳感器，通過(guò)定時(shí)記脈沖來(lái)進(jìn)行測(cè)速，用了一個(gè)外部存儲(chǔ)器，就是這里不怎么懂，希望大佬幫下忙，謝謝

ID:551568 · 發(fā)表于 2019-6-1 18:37

幻劍心發(fā)表于 2019-6-1 16:30
可以，不過(guò)要晚上才有時(shí)間了。

主要是還是太多不懂了，之前發(fā)了一份，不知道發(fā)成功沒(méi)用，我重新發(fā)一下

#include<reg52.h> //調(diào)用單片機(jī)頭文件
#include "DS18B20.h"
#include <stdio.h>
#define uchar unsigned char //無(wú)符號(hào)字符型宏定義變量范圍0~255
#define uint unsigned int //無(wú)符號(hào)整型宏定義變量范圍0~65535
#include "Data.h"
#include "DS1302.h"
#include "AT24C02.h"
sbit COUNT_IN=P3^2; //脈沖輸入端口
//定義1602相關(guān)管腳
sbit rs=P1^4; //寄存器選擇信號(hào) H：數(shù)據(jù) L:指令
sbit en=P1^0; //片選信號(hào) 下降沿觸發(fā)
//鍵盤(pán)定義
sbit K1=P3^4; //設(shè)置時(shí)間
sbit K3=P3^6; //減按鍵
sbit K2=P3^5; //加按鍵
sbit K4=P3^7; //設(shè)置半徑安全距離
sbit BEEP=P3^0; //蜂鳴器外接端口
uint count;
unsigned long Velocity,Mileage;
uchar code tab1[]={" / / : "}; //時(shí)間年月日時(shí) 分星期
uchar code tab2[]={" 0.000km 00 "}; //里程速度
uchar code tab3[]={"Wheel Radius cm"}; // 半徑
uchar code tab4[]={"Safe Speed km/h"}; // 安全速度
uchar code tab5[]={"Sec : "}; // 在按鍵設(shè)置的時(shí)候會(huì)顯示秒
uchar Display_Buff[30]; //顯示
uchar Mode=0;
uchar bike_set=0;
uchar a;
char RADIUS,SAFE_SPEED;
bit LED_SEC;
uchar before_sec;
//自定義字符RAM
uchar code num[]={
0x04,0x04,0x04,0x04,0x04,0x04,0x04,0x00,//1
0x1f,0x01,0x01,0x1f,0x10,0x10,0x1f,0x00,//2
0x1f,0x01,0x01,0x1f,0x01,0x01,0x1f,0x00,//3
0x11,0x11,0x11,0x1f,0x01,0x01,0x01,0x00,//4
0x1f,0x10,0x10,0x1f,0x01,0x01,0x1f,0x00,//5
0x1f,0x10,0x10,0x1f,0x11,0x11,0x1f,0x00,//6
0x1f,0x01,0x01,0x01,0x01,0x01,0x01,0x00,//7 顯示星期依次為周一到周日
};
void READS();
void SETS();
void delay(uint x)
{
uint i,j;
for(i=0;i<x;i++)
for(j=0;j<110;j++);
}
void init()
{
IT0=1; //INT0負(fù)跳變觸發(fā)
TMOD=0x01;//定時(shí)器工作于方式1
TH0=0x3c; //50ms
TL0=0xb0;
EA=1; //CPU開(kāi)中斷總允許
ET0=1;//開(kāi)定時(shí)中斷
EX0=1;//開(kāi)外部INTO中斷
TR0=1;//啟動(dòng)定時(shí)
}
/********液晶寫(xiě)入指令函數(shù)與寫(xiě)入數(shù)據(jù)函數(shù)，以后可調(diào)用**************/
void write_1602com(uchar com)//****液晶寫(xiě)入指令函數(shù)****
{
rs=0;//把寄存器置為指令
P0=com;//送入數(shù)據(jù)
delay(1);
en=1;//拉高使能端，為制造有效的下降沿做準(zhǔn)備
delay(1);
en=0;//en由高變低，產(chǎn)生下降沿，液晶執(zhí)行命令
}
void write_1602dat(uchar dat)//***液晶寫(xiě)入數(shù)據(jù)函數(shù)****
{
rs=1;//把寄存器置為數(shù)據(jù)
P0=dat;//送入數(shù)據(jù)
delay(1);
en=1; //en置高電平，為制造下降沿做準(zhǔn)備
delay(1);
en=0; //en由高變低，產(chǎn)生下降沿，液晶執(zhí)行命令
}
void write_1602_Str(uchar *Str)
{
uchar i = 0;
while (Str[i])
{
write_1602dat(Str[i++]);
}
}
//自定義字符集
void Lcd_ram() // 液晶寫(xiě)數(shù)據(jù)。
{
uchar i,j,k=0;
uchar temp=0x40;//設(shè)定CGRAM地址指令01000000（DB5~DB0含義)
for(i=0;i<7;i++) //自定義7個(gè)字符
{
for(j=0;j<8;j++)
{
write_1602com(temp+j);
write_1602dat(num[k]); //分別寫(xiě)入CGRAM的字模
k++;
}
temp=temp+8;
}
}
void lcd_init()//***液晶初始化函數(shù)****
{
Lcd_ram();
write_1602com(0x38);//設(shè)置液晶8位數(shù)據(jù)工作模式，2行，5×7
write_1602com(0x0c);//整體顯示、開(kāi)光標(biāo)、不閃爍
write_1602com(0x06);//設(shè)定輸入方式屏不移位
write_1602com(0x01);//清除屏幕顯示
write_1602com(0x80);//顯示固定符號(hào)從第一行第1個(gè)位置之后開(kāi)始顯示
for(a=0;a<16;a++)
{
write_1602dat(tab1[a]);//向液晶屏寫(xiě)固定符號(hào)部分
}
write_1602com(0x80+0x40);//顯示固定符號(hào)寫(xiě)入位置，從第2個(gè)位置后開(kāi)始顯示
for(a=0;a<16;a++)
{
write_1602dat(tab2[a]);//寫(xiě)顯示固定符號(hào)
}
}
void display() //液晶顯示部分
{
if(Mode==0&&bike_set==0)
{
//讀時(shí)間
Ds1302_Read_Time();
//顯示時(shí)間
write_1602com(0x80);
write_1602dat(0x30+time_buf1[1]/10); //顯示設(shè)置
write_1602dat(0x30+time_buf1[1]%10);
write_1602com(0x80+3);
write_1602dat(0x30+time_buf1[2]/10);
write_1602dat(0x30+time_buf1[2]%10);
write_1602com(0x80+6);
write_1602dat(0x30+time_buf1[3]/10);
write_1602dat(0x30+time_buf1[3]%10);
write_1602com(0x80+9);
write_1602dat(0x30+time_buf1[4]/10);
write_1602dat(0x30+time_buf1[4]%10);
write_1602com(0x80+12);
write_1602dat(0x30+time_buf1[5]/10);
write_1602dat(0x30+time_buf1[5]%10);
write_1602com(0x80+15);
write_1602dat(time_buf1[7]-1);
if(before_sec!=time_buf1[6])
{
before_sec=time_buf1[6];
write_1602com(0x80+11);
write_1602dat(':');
LED_SEC=1;
}
if(LED_SEC==0)
{
write_1602com(0x80+11);
write_1602dat(' ');
}
write_1602com(0x80+0x40);
if(Mileage/1000000==0)
write_1602dat(' ');
else
write_1602dat(0x30+Mileage/1000000);//數(shù)字+0x30得到該數(shù)字的LCD1602顯示碼
if(Mileage%1000000/100000==0)
write_1602dat(' ');
else
write_1602dat(0x30+Mileage%1000000/100000);//數(shù)字+0x30得到該數(shù)字的LCD1602顯示碼
write_1602dat(0x30+Mileage%1000000%100000/10000);//數(shù)字+0x30得到該數(shù)字的LCD1602顯示碼
write_1602com(0x80+0x40+4);
write_1602dat(0x30+Mileage%1000000%100000%10000/1000);//數(shù)字+30得到該數(shù)字的LCD1602顯示碼
write_1602dat(0x30+Mileage%1000000%100000%10000%1000/100);//數(shù)字+30得到該數(shù)字的LCD1602顯示碼
write_1602dat(0x30+Mileage%1000000%100000%10000%1000%100/10);//數(shù)字+30得到該數(shù)字的LCD1602顯示碼
SETS();
write_1602com(0x80+0x40+10);
write_1602dat(0x30+Velocity/10);
write_1602dat(0x30+Velocity%10);//數(shù)字+30得到該數(shù)字的LCD1602顯示碼
write_1602com(0x80+0x40+13);
sprintf(Display_Buff, "%dC", Temperature);
write_1602_Str(Display_Buff);
}
else if(Mode!=0)
{
switch(Mode)
{
case 1:
write_1602com(0x80+0x40);//顯示固定符號(hào)寫(xiě)入位置
for(a=0;a<16;a++)
{
write_1602dat(tab5[a]);//寫(xiě)顯示固定符號(hào)
}
write_1602com(0x80+0x40+14);
write_1602dat(0x30+time_buf1[6]/10);
write_1602dat(0x30+time_buf1[6]%10);
write_1602com(0x0F); //打開(kāi)閃爍
write_1602com(0x80+1);
break;
case 2:
write_1602com(0x80+4);
break;
case 3:
write_1602com(0x80+7);
break;
case 4:
write_1602com(0x80+10);
break;
case 5:
write_1602com(0x80+13);
break;
case 6:
write_1602com(0x80+0x40+15);
break;
case 7:
write_1602com(0x80+15);
break;
case 8:
write_1602com(0x0c);
write_1602com(0x80);//顯示固定符號(hào)從第一行第1個(gè)位置之后開(kāi)始顯示
for(a=0;a<16;a++)
{
write_1602dat(tab1[a]);//向液晶屏寫(xiě)固定符號(hào)部分
}
write_1602com(0x80+0x40);//顯示固定符號(hào)寫(xiě)入位置，從第2個(gè)位置后開(kāi)始顯示
for(a=0;a<16;a++)
{
write_1602dat(tab2[a]);//寫(xiě)顯示固定符號(hào)
}
break;
}
}
else if(bike_set!=0)
{
switch(bike_set)
{
case 1:
write_1602com(0x80);//顯示固定符號(hào)寫(xiě)入位置
for(a=0;a<16;a++)
{
write_1602dat(tab3[a]);//寫(xiě)顯示固定符號(hào)
}
write_1602com(0x80+0x40);//顯示固定符號(hào)寫(xiě)入位置
for(a=0;a<16;a++)
{
write_1602dat(tab4[a]);//寫(xiě)顯示固定符號(hào)
}
write_1602com(0x80+12);
write_1602dat(0x30+RADIUS/10); //車輪半徑
write_1602dat(0x30+RADIUS%10);
write_1602com(0x80+0x40+10);
write_1602dat(0x30+SAFE_SPEED/10); //安全速度
write_1602dat(0x30+SAFE_SPEED%10);
write_1602com(0x0F); //打開(kāi)光標(biāo)閃爍
write_1602com(0x80+13);
break;
case 2:
write_1602com(0x80+0x40+11);
break;
case 3:
write_1602com(0x0c);
write_1602com(0x80);//顯示固定符號(hào)從第一行第1個(gè)位置之后開(kāi)始顯示
for(a=0;a<16;a++)
{
write_1602dat(tab1[a]);//向液晶屏寫(xiě)固定符號(hào)部分
}
write_1602com(0x80+0x40);//顯示固定符號(hào)寫(xiě)入位置，從第2個(gè)位置后開(kāi)始顯示
for(a=0;a<16;a++)
{
write_1602dat(tab2[a]);//寫(xiě)顯示固定符號(hào)
}
break;
}
}
}
void KEY()
{
if(bike_set==0&&K1==0) //按鍵部分與蜂鳴器
{
delay(20);
if(bike_set==0&&K1==0)
{
BEEP=0;
delay(50);
BEEP=1;
Mode++;
display();
if(Mode>=8)
{
Mode=0;
Ds1302_Write_Time();
}
}
while(bike_set==0&&K1==0);
}
if(K4==0&&Mode==0)
{
delay(20);
if(K4==0&&Mode==0)
{
BEEP=0;
delay(50);
BEEP=1;
bike_set++;
display();
if(bike_set>=3)
{
bike_set=0;
SETS();
}
}
while(Mode==0&&K4==0);
}
//+
if(K2==0&&(Mode!=0||bike_set!=0))
{
delay(20);
//調(diào)時(shí)
if(K2==0&&(Mode!=0||bike_set!=0))
{
BEEP=0;
delay(50);
BEEP=1;
switch(Mode)
{
case 1:
time_buf1[1]++;
if(time_buf1[1]>=100)
time_buf1[1]=0;
write_1602com(0x80);
write_1602dat(0x30+time_buf1[1]/10);
write_1602dat(0x30+time_buf1[1]%10);
write_1602com(0x80+1);
break;
case 2:
time_buf1[2]++;
if(time_buf1[2]>=13)
time_buf1[2]=1;
write_1602com(0x80+3);
write_1602dat(0x30+time_buf1[2]/10);
write_1602dat(0x30+time_buf1[2]%10);
write_1602com(0x80+4);
break;
case 3:
time_buf1[3]++;
if(time_buf1[3]>=YDay(time_buf1[1],time_buf1[2])+1)
time_buf1[3]=1;
write_1602com(0x80+6);
write_1602dat(0x30+time_buf1[3]/10);
write_1602dat(0x30+time_buf1[3]%10);
write_1602com(0x80+7);
break;
case 4:
time_buf1[4]++;
if(time_buf1[4]>=24)
time_buf1[4]=0;
write_1602com(0x80+9);
write_1602dat(0x30+time_buf1[4]/10);
write_1602dat(0x30+time_buf1[4]%10);
write_1602com(0x80+10);
break;
case 5:
time_buf1[5]++;
if(time_buf1[5]>=60)
time_buf1[5]=0;
write_1602com(0x80+12);
write_1602dat(0x30+time_buf1[5]/10);
write_1602dat(0x30+time_buf1[5]%10);
write_1602com(0x80+13);
break;
case 6:
time_buf1[6]++;
if(time_buf1[6]>=60)
time_buf1[6]=0;
write_1602com(0x80+0x40+14);
write_1602dat(0x30+time_buf1[6]/10);
write_1602dat(0x30+time_buf1[6]%10);
write_1602com(0x80+0x40+15);
break;
case 7:
time_buf1[7]++;
if(time_buf1[7]>=8)
time_buf1[7]=1;
write_1602com(0x80+15);
write_1602dat(time_buf1[7]-1);
write_1602com(0x80+15);
break;
}
switch(bike_set)
{
case 1:
RADIUS++;
if(RADIUS>=71)
RADIUS=0;
write_1602com(0x80+12);
write_1602dat(0x30+RADIUS/10);
write_1602dat(0x30+RADIUS%10);
write_1602com(0x80+13);
break;
case 2:
SAFE_SPEED++;
if(SAFE_SPEED>=100)
SAFE_SPEED=0;
write_1602com(0x80+0x40+10);
write_1602dat(0x30+SAFE_SPEED/10);
write_1602dat(0x30+SAFE_SPEED%10);
write_1602com(0x80+0x40+11);
break;
}
}
while(K2==0);
}
//-
if(K3==0&&(Mode!=0||bike_set!=0))
{
delay(20);
//調(diào)時(shí)
if(K3==0&&(Mode!=0||bike_set!=0))
{
BEEP=0;
delay(50);
BEEP=1;
switch(Mode)
{
case 1:
time_buf1[1]--;
if(time_buf1[1]<0)
time_buf1[1]=99;
write_1602com(0x80);
write_1602dat(0x30+time_buf1[1]/10);
write_1602dat(0x30+time_buf1[1]%10);
write_1602com(0x80+1);
break;
case 2:
time_buf1[2]--;
if(time_buf1[2]<=0)
time_buf1[2]=12;
write_1602com(0x80+3);
write_1602dat(0x30+time_buf1[2]/10);
write_1602dat(0x30+time_buf1[2]%10);
write_1602com(0x80+4);
break;
case 3:
time_buf1[3]--;
if(time_buf1[3]<=0)
time_buf1[3]=YDay(time_buf1[1],time_buf1[2]);
write_1602com(0x80+6);
write_1602dat(0x30+time_buf1[3]/10);
write_1602dat(0x30+time_buf1[3]%10);
write_1602com(0x80+7);
break;
case 4:
time_buf1[4]--;
if(time_buf1[4]<0)
time_buf1[4]=23;
write_1602com(0x80+9);
write_1602dat(0x30+time_buf1[4]/10);
write_1602dat(0x30+time_buf1[4]%10);
write_1602com(0x80+10);
break;
case 5:
time_buf1[5]--;
if(time_buf1[5]<0)
time_buf1[5]=59;
write_1602com(0x80+12);
write_1602dat(0x30+time_buf1[5]/10);
write_1602dat(0x30+time_buf1[5]%10);
write_1602com(0x80+13);
break;
case 6:
time_buf1[6]--;
if(time_buf1[6]<0)
time_buf1[6]=59;
write_1602com(0x80+0x40+14);
write_1602dat(0x30+time_buf1[6]/10);
write_1602dat(0x30+time_buf1[6]%10);
write_1602com(0x80+0x40+15);
break;
case 7:
time_buf1[7]--;
if(time_buf1[7]<1)
time_buf1[7]=7;
write_1602com(0x80+15);
write_1602dat(time_buf1[7]-1);
write_1602com(0x80+15);
break;
}
switch(bike_set)
{
case 1:
RADIUS--;
if(RADIUS<0)
RADIUS=70;
write_1602com(0x80+12);
write_1602dat(0x30+RADIUS/10);
write_1602dat(0x30+RADIUS%10);
write_1602com(0x80+13);
break;
case 2:
SAFE_SPEED--;
if(SAFE_SPEED<0)
SAFE_SPEED=99;
write_1602com(0x80+0x40+10);
write_1602dat(0x30+SAFE_SPEED/10);
write_1602dat(0x30+SAFE_SPEED%10);
write_1602com(0x80+0x40+11);
break;
}
}
while(K3==0);
}
if(K2==0&&K3==0&&Mode==0&bike_set==0)
{
BEEP=0;
delay(100);
BEEP=1;
delay(100);
BEEP=0;
delay(100);
BEEP=1;
delay(100);
Mileage=0;
SETS();
while(K2==0&&K3==0);
}
}
void BJ_SAFE()
{
if(Velocity>SAFE_SPEED)
{
BEEP=0; //蜂鳴器響
}
else
{
BEEP=1; //蜂鳴器不響
}
}
void main()
{
//初始化
Ds1302_Init();
lcd_init();
initeeprom();
//讀取初始參數(shù)
READS();
//定時(shí)器初始化
// InitTimer0();
init();
lcd_init();
before_sec=time_buf1[6];
Temp_Get(); // 第一次采集是錯(cuò)誤數(shù)據(jù)
delay(200);
Temp_Get(); // 第一次采集是錯(cuò)誤數(shù)據(jù)
delay(200);
Temp_Get(); // 第一次采集是錯(cuò)誤數(shù)據(jù)
delay(200);
Temp_Get(); // 第一次采集是錯(cuò)誤數(shù)據(jù)
delay(200);
Temp_Get(); // 第一次采集是錯(cuò)誤數(shù)據(jù)
while(1) //等待定時(shí)器中斷
{
if(Mode==0&&bike_set==0)
{
display();
BJ_SAFE();
}
KEY();
Temp_Handle();
}
}
void EXINT0() interrupt 0
{
count++;
}
void time0() interrupt 1
{
uchar m,n;
TH0=0x3c;
TL0=0xb0; //50ms
m++;
if(LED_SEC==1)
{
n++;
if(n>=10)
{
n=0;
LED_SEC=0;
}
}
if(m>=10)
{
m=0;
Mileage=Mileage+count*2*3.14*RADIUS/20/10;//里程數(shù)mileage=里程+記數(shù)值*輪周長(zhǎng)/脈沖數(shù)/10
Velocity=count*2*3.14*RADIUS/100000*3600*2/20;//總定時(shí)500ms
count=0;
}
} // 處理數(shù)據(jù)，并顯示里程和速度
//讀初值
void READS()
{
uchar Mileage_H,Mileage_M,Mileage_L;
delay(10);
RADIUS=read_add(0x01);
delay(10);
SAFE_SPEED=read_add(0x02);
delay(10);
Mileage_H=read_add(0x03);
delay(10);
Mileage_M=read_add(0x04);
delay(10);
Mileage_L=read_add(0x05);
Mileage=Mileage_H*100000+Mileage_M*1000+Mileage_L*10;
}
//寫(xiě)初值
void SETS()
{
delay(10);
write_add(0x01,RADIUS);
delay(10);
write_add(0x02,SAFE_SPEED);
/* Mileage_H=Mileage/10000; //123.4560
Mileage_M=Mileage%10000/100;
Mileage_L=Mileage%10000%100; */
delay(10);
write_add(0x03,Mileage/100000);
delay(10);
write_add(0x04,Mileage%100000/1000);
delay(10);
write_add(0x05,Mileage%100000%1000/10);
}

復(fù)制代碼

ID:511890 · 發(fā)表于 2019-6-1 21:02

程序應(yīng)該是一個(gè)里程計(jì)數(shù)器。外部應(yīng)該還有霍爾之類的轉(zhuǎn)速傳感器。根據(jù)轉(zhuǎn)速傳感器得到count，然后根據(jù)車輪周長(zhǎng)計(jì)算，累加成Mileage。通過(guò)uchar code tab3[]={"Wheel Radius  cm"};          // 半徑知道RADIUS是半徑。脈沖數(shù)20應(yīng)該是車輪轉(zhuǎn)20分之1就會(huì)發(fā)出一次脈沖。再除以10，得到Mileage的單位為分米。
Mileage=Mileage+count*2*3.14*RADIUS/20/10;//里程數(shù)mileage=里程+記數(shù)值*輪周長(zhǎng)/脈沖數(shù)/10

程序中READS()作用是單片機(jī)開(kāi)機(jī)時(shí)從AT24C02讀出存儲(chǔ)在AT24C02中的歷史里程數(shù)。SETS()是存儲(chǔ)當(dāng)前里程數(shù)。
根據(jù)SETS()中的存儲(chǔ)方式：首先假設(shè)Mileage = 6543210  由于AT24C02每次操作的地址或者數(shù)據(jù)都只是8位(即值范圍為：0~255)Mileage = 6543210遠(yuǎn)大于255，所以要把它分開(kāi)存儲(chǔ)。由前面知道Mileage的單位為分米，再舍掉個(gè)位，剛好得到米為單位的值。所以用一下方法存取：
低位：Mileage%100000%1000/10=21
中位：Mileage%100000/1000=43
高位：Mileage/100000=65

uchar code tab2[]={"  0.000km 00 "};       //里程速度
write_1602com(0x80+0x40);
                     if(Mileage/1000000==0)
                     write_1602dat(' ');
                     else
                     write_1602dat(0x30+Mileage/1000000);//數(shù)字+0x30得到該數(shù)字的LCD1602顯示碼
                     if(Mileage%1000000/100000==0)
                     write_1602dat(' ');
                     else
                     write_1602dat(0x30+Mileage%1000000/100000);//數(shù)字+0x30得到該數(shù)字的LCD1602顯示碼
                     write_1602dat(0x30+Mileage%1000000%100000/10000);//數(shù)字+0x30得到該數(shù)字的LCD1602顯示碼
                     write_1602com(0x80+0x40+4);
                     write_1602dat(0x30+Mileage%1000000%100000%10000/1000);//數(shù)字+30得到該數(shù)字的LCD1602顯示碼
                     write_1602dat(0x30+Mileage%1000000%100000%10000%1000/100);//數(shù)字+30得到該數(shù)字的LCD1602顯示碼
                     write_1602dat(0x30+Mileage%1000000%100000%10000%1000%100/10);//數(shù)字+30得到該數(shù)字的LCD1602顯示碼
這些代碼也證明了Mileage的單位是分米。

ID:551568 · 發(fā)表于 2019-6-3 01:27

幻劍心發(fā)表于 2019-6-1 21:02
程序應(yīng)該是一個(gè)里程計(jì)數(shù)器。外部應(yīng)該還有霍爾之類的轉(zhuǎn)速傳感器。根據(jù)轉(zhuǎn)速傳感器得到count，然后根據(jù)車輪周 ...

哥我再問(wèn)一個(gè)問(wèn)題哈，有點(diǎn)疑惑，如果里程的單位為分米的話，那么這上面寫(xiě)千米的單位不是錯(cuò)了嗎

ID:551568 · 發(fā)表于 2019-6-3 01:36

幻劍心發(fā)表于 2019-6-1 21:02
程序應(yīng)該是一個(gè)里程計(jì)數(shù)器。外部應(yīng)該還有霍爾之類的轉(zhuǎn)速傳感器。根據(jù)轉(zhuǎn)速傳感器得到count，然后根據(jù)車輪周 ...

哥我反應(yīng)過(guò)來(lái)了反應(yīng)太遲鈍了

ID:56665 · 發(fā)表于 2019-6-3 08:35

合并成10進(jìn)制數(shù)

ID:325337 · 發(fā)表于 2020-5-25 10:47

幻劍心發(fā)表于 2019-6-1 21:02
程序應(yīng)該是一個(gè)里程計(jì)數(shù)器。外部應(yīng)該還有霍爾之類的轉(zhuǎn)速傳感器。根據(jù)轉(zhuǎn)速傳感器得到count，然后根據(jù)車輪周 ...

哥，我也想問(wèn)一下就是這個(gè)公式 Velocity=count*2*3.14*RADIUS/100000*3600*2/20;他后邊/100000*3600*2/20是啥意思啊？

ID:325337 · 發(fā)表于 2020-5-25 10:52

我的國(guó)兒發(fā)表于 2019-6-3 01:27
哥我再問(wèn)一個(gè)問(wèn)題哈，有點(diǎn)疑惑，如果里程的單位為分米的話，那么這上面寫(xiě)千米的單位不是錯(cuò)了嗎

我也想說(shuō)，那個(gè)是分米的話，顯示的是千米，那不是錯(cuò)了嗎…兄弟你是咋想明白的

帳號(hào)		自動(dòng)登錄	找回密碼
密碼			立即注冊(cè)

久久久久久久999_99精品久久精品一区二区爱城_成人欧美一区二区三区在线播放_国产精品日本一区二区不卡视频_国产午夜视频_欧美精品在线观看免费

這個(gè)單片機(jī)程序定義沒(méi)怎么看懂，H,M,L沒(méi)懂什么意思，還有就是為什么要乘100000,100...

評(píng)分

評(píng)分

評(píng)分

評(píng)分