hongwai.c

无刷电机的控制程序

//--------------------------------------------------
// 外部中断1服务程序
// 即红外识别程序
//--------------------------------------------------
#include "sfr.h"
#include "port.h"
//--------------------------------------------------
extern bit Ready;	
extern enum State IRstate;	
//--------------------------------------------------
void IRint() interrupt 2
{
	static unchar count = 0;
	static unchar recevier[9] = {0,0,0,0,0,0,0,0,0};
	static unchar temp = 0;
	static unchar bits = 1;
	static unchar i = 0;
	unint time = 0;

	count++;
	if( count >= 3 )
	{
		if( count == 3 )
		{
			TL1 = 0;        // 第一个下降沿使能Timer1
        	TH1 = 0;
       		TR1 = 1;
		}
		else 
		{
			TR1  = 0;       // 禁止Timer1,准备Timer1的值
        	time = TH1;
        	time = ( time << 8 ) + TL1;     // 读TIEMR1的值,看此电平的时间为多少
        	TL1  = 0;
        	TH1  = 0;
        	TR1  = 1;

			if( time > 50 )
			{
				if ( ( time > 0x0460 ) && ( time < 0x0490 ) )		// 说明收到的此位为1
				{
					temp |= bits;				
				}

				bits = bits << 1;
			}

			if( bits == 0 )		// 收到一个字节的数据了
			{
				recevier[i] = temp;
				temp = 0;
				bits = 1;
				i++;
				if( i == 9 )		//按一次按键产生的数据都已经收到
				{
					i = 0;
					count = 0;
					Ready = 1;
					recevier[1] = recevier[1] & 0xF0;
					if( recevier[0] == 0xA5 )
					{
						switch ( recevier[1] )
						{
							case 0x00:			// 按下的是开关键
								IRstate = IR_stop;
								break;
							case 0x80:			// 按下的是开关键								
								IRstate = IR_start;
								break;			
							case 0xC0: 									// 按下的是风速键
								if( recevier[5] == 0x03 )
								{
									IRstate = IR_low;					// 低风档
								}
								else if( recevier[5] == 0x01 )
								{
									IRstate = IR_middle;				// 中风档
								}
								else if( recevier[5] == 0x02 )
								{
									IRstate = IR_large;					// 高风档
								}
								else
								{
									IRstate = IR_error;	
								}
								break;
							case 0x40:									// 按下的是模式键
								if( recevier[6] == 0x04 )
								{
									IRstate = IR_sleep;					// 睡眠模式
								}
								else if( recevier[6] == 0x02 )
								{
									IRstate = IR_clever;				// 聪明模式
								}
								else if( recevier[6] == 0x06 )
								{
									IRstate = IR_simple;				// 普通无模式
								}
								else
								{
									IRstate = IR_error;	
								}
								break;
						   	default:								
 						    	IRstate = IR_error;							// 收到误码
								break;
						}
				 	}
					else
					{
						IRstate = IR_error;									// 收到误码
					}
				}
			}
	   	}
	}
}