#include <string.h>
#include <stdio.h>

#include "Target\44b.h"
#include "Target\44blib.h"
/********************************************/
//   ARMSYS實驗五：I/O應用測試 
//   描述：矩陣鍵盤掃描讀入                    
/********************************************/
const char Keyboard[4][4] = {
	                          	{'7','8','9','/'},
	                          	{'4','5','6','*'},
	                          	{'1','2','3','-'},
	                          	{'0','.','+','\n'}};

char ReadKeybd(void)
{

    unsigned int PCONFback=0;
	unsigned int PUPFback=0;
	unsigned char  scanvalue[4] ={0xfe,0xfd,0xfb,0xf7};
	unsigned char  i,j,x,temp;
	char keyvalue=0;
	
	PCONFback = rPCONF;
	rPCONF = 0x55;//pf0-pf3:output, pf4-pf7:input
	PUPFback=rPUPG;
	rPUPF=0xff;//disable pull-up

	rPDATF=0xf0;//pf0-pf3:0
	if((temp=(rPDATF&0xf0))!=0xf0){
		for(i=0;i<4;i++){
			rPDATF=scanvalue[i];
			for(x=0;x<100;x++);
			if((temp=(rPDATF&0xf0))!=0xf0){
				temp=(~(temp>>4))&0x0f;
				for(j=0;j<4;j++){
					if(temp==0x01){
						keyvalue=Keyboard[j][i];
						return keyvalue;
						}
					else
						temp=temp>>1;
					}
				}
			}
		}
	rPCONF=PCONFback;
	rPUPF=PUPFback;
	return keyvalue;
}

void Main(void)
{
	char aa,ch1=0,ch2=0;
	unsigned char keyflg=0;
	
    Port_Init();
	Led_Display(0xf);
	Beep(0x1);
	Uart_Printf("\n\n*************************************************************************");
	Beep(0x0);
	Uart_Printf("\n*                            立泰電子                                    *");
	Uart_Printf("\n*                     -S3C44B0X功能部件:I/O測試-                         *");
	Uart_Printf("\n*                          Version 1.11                                 *");    
	Uart_Printf("\n*                     Email:rao_dali@263.net                            *");
	Uart_Printf("\n*             UART Config--COM:115.2kbps,8Bit,NP,UART0                  *");
	Uart_Printf("\n*------------------Begin to Start IO test,OK? (Y/N)--------------------*");
	Led_Display(0x0);
    aa= Uart_Getch();
	if((aa=='Y')||(aa=='y'))
	{
	   Uart_Printf("\nBegin Keyboard Scan...");
	   while(1)
	  {	
		ch1=ReadKeybd();
		if(ch1!=0){
			if((keyflg==1)&&(ch1==ch2))//Co
			{
				Uart_SendByte(ch1);
				while((rPDATF&0xf0)!=0xf0);//等待按鍵釋放
			}
			else{
				keyflg=1;
				ch2=ch1;
				}
		}
		else{
			keyflg=0;
			ch2=0;
		}
		
		Delay(1000);
	  }
   }
}