keyscan.c.bak

LCD显示电子计价秤方案 1. 该方案使用的传感器为20KG,灵敏度约为0.5mv/v,选用新传感器线性较好的一段(100g-15Kg),直接处理,没有做非线性修正,称重可能会有偏差. 2. 软件

#include<def.h>
#define  SCANPORT	P2
uint bdata	keyres;
sbit key_0=keyres^0;	
sbit key_1=keyres^1;
sbit key_2=keyres^2;
sbit key_3=keyres^3;
sbit key_4=keyres^4;
sbit key_5=keyres^5;
sbit key_6=keyres^6;
sbit key_7=keyres^7;
sbit key_8=keyres^8;
sbit key_9=keyres^9;
sbit key_p=keyres^10;
sbit key_flay =keyres^11;
sbit key_clear=keyres^12;
sbit key_store=keyres^13;
sbit key_add  =keyres^14;
sbit key_cladd=keyres^15;

uint bdata keystatus;
sbit s_0=keystatus^0;
sbit s_1=keystatus^1;
sbit s_2=keystatus^2;
sbit s_3=keystatus^3;
sbit s_4=keystatus^4;
sbit s_5=keystatus^5;
sbit s_6=keystatus^6;
sbit s_7=keystatus^7;
sbit s_8=keystatus^8;
sbit s_9=keystatus^9;
sbit s_p=keystatus^10;
sbit s_flay =keystatus^11;
sbit s_clear=keystatus^12;
sbit s_store=keystatus^13;
sbit s_add  =keystatus^14;
sbit s_cladd=keystatus^15;

uchar	bdata	keyres_long;
sbit	key_point_long=keyres_long^0;	//point长按
sbit	key_store_long=keyres_long^1;	//存储长按 
//----------------------------------------按键扫描程序--------------------------------------------
uchar key_mcu()
{
	uchar i,keydata;
   	//利用P2口做键盘扫描
    SCANPORT=0Xfe;	//初始状态    
    for(i=0;i<4;i++)
	{	  	
		switch(SCANPORT)
	   	{
	   	  	case 0xee:s_0=1 ;break;	 
		  	case 0xde:s_1=1 ;break;	 
			case 0xbe:s_2=1;break;	 
			case 0x7e:keydata=4 ;break;
			case 0xed:keydata=5 ;break;	 
		  	case 0xdd:keydata=6 ;break;	 
			case 0xbd:keydata=7 ;break;	 
			case 0x7d:keydata=8 ;break;
			case 0xeb:keydata=9 ;break;	 
		  	case 0xdb:keydata=10;break;	 
			case 0xbb:keydata=11;break;	 
			case 0x7b:keydata=12;break;
			case 0xe7:keydata=13;break;	 
		  	case 0xd7:keydata=14;break;	 
			case 0xb7:keydata=15;break;	 
			case 0x77:keydata=16;break;	 
			default:keydata=0;//无按键按下
	   	}
		SCANPORT<<=1;
		SCANPORT|=0x01;		
	}
   	return(keydata);
}
void key_ser()
{

}
void keydeal()
{
	keyres=0;
	keyres_long=0;
	if(keybit==0)
	{
		key_mcu();	//调用单片机扫描键盘

	}
	else
	{
		key_ser();	//调用串行扫描
	}

}