//?8255芯片1的I/O端口地址，并口
#define?IOCON	8006H
#define?IOA?????8000H
#define?IOB?????8002H

//?8255芯片2的I/O端口地址，并口
#define?IOCON2??90C0H
#define?IOA2????9000H
#define?IOB2????9040H

//?0809芯片的I/O端口地址，AD數模轉換
#define?AD0809	0E002H

//?檔位
#define??STOP?????0xfb
#define??BACK?????0xfd
#define??SLOW?????0xfe
#define??MID??????0xf7
#define??FAST?????0xef

unsigned?char?tableNum[10]={0xc00xf90xa40xb00x990x920x820xf80x800x90};?//?0?1?2?...?9

unsigned?char?table1[8]={0x020x060x040x0c0x080x090x010x03};?//?八個方向，順時針，相隔?45°
unsigned?char?table2[8]={0x030x010x090x080x0c0x040x060x02};

void?outp（unsigned?int?addr?char?data）
//?Write?a?byte?to?the?specified?I/O?port
?{?__asm
????{?mov?dx?addr
??????mov?al?data
??????out?dx?al
????}
?}

char?inp（unsigned?int?addr）
//?Read?a?byte?from?the?specified?I/O?port
{?char?result;
???__asm
????{?mov?dx?addr
??????in?al?dx
??????mov?result?al
????}
???return?result;
}

?//?由檔位和油門決定速度（delay的長短）
unsigned?int?speedAndDelay（unsigned?char?gear?unsigned?char?digital）?
{
	unsigned?int?accelerator?=?（unsigned?int）digital;
	unsigned?int?delay?=?0;
	unsigned?int?speed?=?0;
	if（gear==SLOW）
	{
		delay?=?accelerator/4?+?150;???????//速度越慢，delay時間越長
		if（accelerator<64）???????speed=4;
		else?if（accelerator<128）?speed=3;
		else?if（accelerator<192）?speed=2;
		else?????????????????????speed=1;
	}
	else?if（gear==MID）
	{
		delay?=?accelerator/4?+?50;
		if（accelerator<64）???????speed=7;
		else?if（accelerator<128）?speed=6;
		else?if（accelerator<192）?speed=5;
		else?????????????????????speed=4;
	}
	else?if（gear==FAST）
	{
		delay?=?accelerator/4?+?10;
		if（accelerator<64）???????speed=9;
		else?if（accelerator<128）?speed=8;
		else?if（accelerator<192）?speed=7;
		else?????????????????????speed=6;
	}
	else?if（gear==BACK）
	{
		delay?=?200;
		speed?=?2;??????????????//?倒車恒速
	}
	for（unsigned?int?i=0;?i	{
	}
	return?speed;
}

void?print（unsigned?int?speed）
{
	outp（IOA2?tableNum[speed]）;?
	outp（IOB2?0x08）;
}


void?main（void）
{
	unsigned?char?digital;???//?轉換成的數字信號
	unsigned?char?gear=0;????//?汽車的檔位
????outp（IOCON0x90）;
	outp（IOCON2?0x80）;

????while（1）
????{
????????gear=inp（IOA）;
		
????????if（gear==BACK）??//?倒車
		{
			while（1）
			{
????????
				for（int?indx=0;indx<8;indx++）
				{
					outp（IOBtable2[indx]）;
					for（int?i=0;i<3;++i）???//?讀三次
					{
						gear=inp（IOA）;
					}
????????????????????if（gear==SLOW||gear==STOP||gear==MID||gear==FAST）
						break;?

					outp（AD08090）;
					digital=inp（AD0809）;
					unsigned?int?speed?=?speedAndDelay（BACK?digital）;

					print（speed）;
				
				}
				if（gear==SLOW||gear==STOP||gear==MID||gear==FAST）
					break;
			}
????????}
		if（gear==SLOW）??//?前進?1?
		{
			while（1）
			{
				for（int?indx=0;indx<8;indx++）
				{
					outp（IOBtable1[indx]）;
					for（int?i=0;i<3;++i）???//?讀三次
					{
						gear=inp（IOA）;
					}
					if（gear==B

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????文件????????4422??2016-01-19?16:20??8086\main.c
?????文件???????45330??2016-01-19?12:53??汽車控制高級系統——電路圖.PDF
?????目錄???????????0??2016-01-08?10:35??8086\
?????目錄???????????0??2016-01-08?17:49??8086\Debug\
?????文件????????3972??2016-01-19?12:24??8086\Debug\Debug.exe
?????文件????????1181??2016-01-19?12:24??8086\Debug\Makefile
?????文件????????2723??2016-01-19?12:24??8086\Debug\main.obj
?????文件?????????190??2016-01-08?10:58??8086\Debug\rtl.obj
?????文件?????????559??2016-01-08?09:48??8086\rtl.asm
?????文件???????32585??2016-01-19?12:56??汽車控制高級系統.pdsprj