基于單片機(jī)的轉(zhuǎn)速測量系統(tǒng)設(shè)計-資料下載頁
2025-06-22 02:01本頁面
【正文】 65535)external_counter = 0。time_counter8 = 0。 //只要8秒內(nèi)有切割，車子就任在運(yùn)行if(external_counter % 2 == 0)//切割2次 更新下速度{ //*5是因?yàn)橹袛嘁淮问?MSif(flag1==0){speed =((ulong)(36000)*zhouchang)/(time_counter * 5)。flag1=1。} else if(flag1==1){speed =((ulong)(36000)*2*zhouchang)/(time_counter * 5)。}//速度：單位為 m/h ,*1000的目的是不出現(xiàn)浮點(diǎn)數(shù)if((speed = 100)amp。amp。(speed 1000)) //100 1000 3位整數(shù){point1 = 1。buf1[3] = speed%10。buf1[2] = speed/10%10。buf1[1] = speed/100%10。buf1[0] = 0。}else if((speed = 1000)amp。amp。(speed 10000)) //1000 10000 4位整數(shù){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)amp。amp。(speed 100000)) //10000 100000 5位整數(shù){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)amp。amp。(speed 1000000)) //100000 1000000 6位整數(shù){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：單位為 cmif((s = 1000)amp。amp。(s 10000)){point2 = 1。 // 001212buf2[3] = s/100%10。buf2[2] = s/1000%10。buf2[1] = 0。buf2[0] = 0。}// 4位整數(shù)else if((s = 10000)amp。amp。(s 100000)){point2 = 1。buf2[3] = s/100%10。buf2[2] = s/1000%10。buf2[1] = s/10000%10。buf2[0] = 0。}// 5位整數(shù) 012345else if((s = 100000)amp。amp。(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位整數(shù) 1234 56 else if((s = 1000000)amp。amp。(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位整數(shù) 1234 567else if((s = 10000000)amp。amp。(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位整數(shù) 1234 5678}}//==================================開電源就顯示的數(shù)據(jù),初始顯示速度========================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。}}//====================================顯示函數(shù)===================================void display_function(){if(flag == 0)//顯示速度{switch(point1){case 0:wei = bitcode[num1]。led = display1[buf1[num1]]。num。break。//速度顯示 0case 1:if(num == 1){ wei = bitcode[num1]。led = 0x7famp。display1[buf1[num1]]。num。} else { wei = bitcode[num1]。led = display1[buf1[num1]]。num。}break。//最高位小數(shù)點(diǎn)亮 case 2:if(num == 2){ wei = bitcode[num1]。led = 0x7famp。display1[buf1[num1]]。num。} else { wei = bitcode[num1]。led = display1[buf1[num1]]。num。}break。//第二高位小數(shù)點(diǎn)亮 case 3:if(num == 3){ wei = bitcode[num1]。led = 0x7famp。display1[buf1[num1]]。num。} else { wei = bitcode[num1]。led = display1[buf1[num1]]。num。}break。//第三高位小數(shù)點(diǎn)亮default:break。 }if(num == 0)num = 4。}else if(flag == 1)//顯示里程 {switch(point2){case 0:wei = bitcode[num1]。led = display1[buf2[num1]]。num。break。//里程顯示 0case 1:if(num == 1){ wei = bitcode[num1]。led = 0x7famp。display1[buf2[num1]]。num。} else { wei = bitcode[num1]。led = display1[buf2[num1]]。num。}break。//最高位小數(shù)點(diǎn)亮 case 2:if(num == 2){ wei = bitcode[num1]。led = 0x7famp。display1[buf2[num1]]。num。} else { wei = bitcode[num1]。led = display1[buf2[num1]]。num。}break。//第二高位小數(shù)點(diǎn)亮 case 3:if(num == 3){ wei = bitcode[num1]。led = 0x7famp。display1[buf2[num1]]。num。} else { wei = bitcode[num1]。led = display1[buf2[num1]]。num。}break。//第三高位小數(shù)點(diǎn)亮default:break。 }if(num == 0)num = 4。 }} //=================================定時器0和外部中斷0的初始化函數(shù)=================void time0_int0_init(){TMOD |= 0x01。TMOD amp。= 0xfd。//定時器0工作于方式1TL0 = (65536 5000) % 256。//12M晶振，5ms定時TH0 = (65536 5000) / 256。IT0 = 1。//外部中斷0，負(fù)跳變觸發(fā)方式TR0 = 0。ET0 = 1。EX0 = 1。EA = 1。}//====================================ms 級延時函數(shù)=========================== void delay1m(uchar x){uchar i,j。for(i=0。ix。i++) //連數(shù)x次，約 x msfor(j=0。j120。j++)。 //數(shù)120 次，約1 ms}
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