单片机数码管显示自行车里程c语言,项目实战：51单片机霍尔自行车里程测速仪设计升级版 原理图 程序 制作BOM...

里程c语言,项目实战：51单片机霍尔自行车里程测速仪设计升级版 原理图 程序 制作BOM..."/>

单片机数码管显示自行车里程c语言,项目实战：51单片机霍尔自行车里程测速仪设计升级版 原理图 程序 制作BOM...

}

}

//==定时器0中断函数

void time0_interrupt()interrupt 1

{

TL0 = (65536 - 5000) % 256;// 12M晶振，5ms定时

TH0 = (65536 - 5000) / 256;

display_function();

time_counter++;

time_counter8++;

if(time_counter8 >= 1600)//大于8s没切割，车子视为停下了,速度为：0，但里程还记着

{

time_counter8 = 0;

speed = 0;//速度为 0

point1 = 0;

buf1[3] = speed%10;buf1[2] = speed/10%10;

buf1[1] = speed/100%10;buf1[0] = speed/1000%10;

}

}

//==========外部中断0中断函数=

void int0_interrupt()interrupt 0

{

external_counter++;

if(external_counter ==1 )TR0 = ~TR0;//第一次切割打开定时器0

if(external_counter == 65535)external_counter = 0;

time_counter8 = 0; //只要8秒内有切割，车子就任在运行

if(external_counter % 2 == 0)//切割2次 更新下速度

{ //*5是因为中断一次是5MS

if(flag10){speed =((ulong)(36000)*zhouchang)/(time_counter * 5);flag1=1;}

else if(flag11){speed =((ulong)(36000)2zhouchang)/(time_counter * 5);}//速度：单位为 m/h ,*1000的目的是不出现浮点数

if((speed >= 100)&&(speed < 1000)) //100 ---- 1000 3位整数

{

point1 = 1;buf1[3] = speed%10;buf1[2] = speed/10%10;

buf1[1] = speed/100%10;buf1[0] = 0;}

else if((speed >= 1000)&&(speed < 10000)) //1000 ---- 10000 4位整数

{

point1 = 1;speed = (uint)speed;

buf1[3] = speed%10;buf1[2] = speed/10%10;

buf1[1] = speed/100%10;buf1[0] = speed/1000%10;}

else if((speed >= 10000)&&(speed < 100000)) //10000 ----- 100000 5位整数

{

point1 = 2;

buf1[3] = speed/10%10;buf1[2] = speed/100%10;

buf1[1] = speed/1000%10;buf1[0] = speed/10000%10;}

else if((speed >= 100000)&&(speed < 1000000)) //100000 ------ 1000000 6位整数

{

point1 = 3;

buf1[3] = speed/100%10;buf1[2] = speed/1000%10;

buf1[1] = speed/10000%10;buf1[0] = speed/100000%10;}

time_counter = 0;

}

if(external_counter % 8 == 0)//每切割8次 更新下里程

{

s = (ulong)external_counter * zhouchang; //里程：单位为 cm

if((s >= 1000)&&(s < 10000))

{

point2 = 1; // 0.012 001212

buf2[3] = s/100%10;buf2[2] = s/1000%10;

buf2[1] = 0;buf2[0] = 0;}// 4位整数

else if((s >= 10000)&&(s < 100000))

{

point2 = 1;

buf2[3] = s/100%10;buf2[2] = s/1000%10;

buf2[1] = s/10000%10;buf2[0] = 0;}// 5位整数 0.123 012345

else if((s >= 100000)&&(s < 1000000))

{

point2 = 1;

buf2[3] = s/100%10;buf2[2] = s/1000%10;

buf2[1] = s/10000%10;buf2[0] = s/100000%10;} // 6位整数 1.234 1234 56

else if((s >= 1000000)&&(s < 10000000))

{

point2 = 2;

buf2[3] = s/1000%10;buf2[2] = s/10000%10;

buf2[1] = s/100000%10;buf2[0] = s/1000000%10;}// 7位整数 1234 567

else if((s >= 10000000)&&(s < 100000000))

{

point2 = 3;

buf2[3] = s/10000%10;buf2[2] = s/100000%10;

buf2[1] = s/1000000%10;buf2[0] = s/10000000%10;} // 8位整数 1234 5678

}

}

//==========开电源就显示的数据,初始显示速度

void init_display()

{

uchar i;

for(i = 0;i < 4;i++)

{

wei = bitcode[num - 1];

led = display1[buf1[num–]];

delay1m(4);

if(num == 0)num = 4;

}

}

//==显示函数=

void display_function()

{

if(flag == 0)//显示速度

{

switch(point1)

{

case 0:wei = bitcode[num-1];led = display1[buf1[num-1]];num–;break;//速度显示 0

case 1:if(num == 1){ wei = bitcode[num-1];led = 0x7f&display1[buf1[num-1]];num–;}

else { wei = bitcode[num-1];led = display1[buf1[num-1]];num–;}break;//最高位小数点亮

case 2:if(num == 2){ wei = bitcode[num-1];led = 0x7f&display1[buf1[num-1]];num–;}

else { wei = bitcode[num-1];led = display1[buf1[num-1]];num–;}break;//第二高位小数点亮

case 3:if(num == 3){ wei = bitcode[num-1];led = 0x7f&display1[buf1[num-1]];num–;}

else { wei = bitcode[num-1];led = display1[buf1[num-1]];num–;}break;//第三高位小数点亮

default:break;

}

if(num == 0)num = 4;

}

else if(flag == 1)//显示里程

{

switch(point2)

{

case 0:wei = bitcode[num-1];led = display1[buf2[num-1]];num–;break;//里程显示 0

case 1:if(num == 1){ wei = bitcode[num-1];led = 0x7f&display1[buf2[num-1]];num–;}

else { wei = bitcode[num-1];led = display1[buf2[num-1]];num–;}break;//最高位小数点亮

case 2:if(num == 2){ wei = bitcode[num-1];led = 0x7f&display1[buf2[num-1]];num–;}

else { wei = bitcode[num-1];led = display1[buf2[num-1]];num–;}break;//第二高位小数点亮

case 3:if(num == 3){ wei = bitcode[num-1];led = 0x7f&display1[buf2[num-1]];num–;}

else { wei = bitcode[num-1];led = display1[buf2[num-1]];num–;}break;//第三高位小数点亮

default:break;

}

if(num == 0)num = 4;

}

}

//=================定时器0和外部中断0的初始化函数=void time0_int0_init(){TMOD |= 0x01;TMOD &= 0xfd;//定时器0工作于方式1TL0 = (65536 - 5000) % 256;//12M晶振，5ms定时TH0 = (65536 - 5000) / 256;IT0 = 1;//外部中断0，负跳变触发方式TR0 = 0;ET0 = 1;EX0 = 1;EA = 1;}//==========ms 级延时函数=void delay1m(uchar x){uchar i,j;for(i=0;i