main.c

S3C44B0X全套培训资料及源代码,ARM 并行口仿真器的使用.

#include "..\startup\44b.h"
#include"..\ucos-ii\includes.h"   
#include"..\inc\Uhal.h"
unsigned char MykeyBoard_KeyMap[]={1,4,7,10,2,5,8,0,3,6,9,11,12,13,14,15};//10-退格,11-*/.,12-↑,13-↓,14-确定,15-取消
unsigned short  MyGetScanKey();
unsigned int  MyGetKey();
int Main(int argc, char **argv)
{
unsigned int key;
unsigned int tempkey=0;
Uart_SendByte(0,0xa);//换行
Uart_SendByte(0,0xd);//回车
       
	for (;;){
		
		key=MyGetKey();
		key&=0x000f;
		if(key>9){
			Uart_SendByte(0,0x31);
			tempkey=key-10;
			Uart_SendByte(0,tempkey|=0x0030);
			}
		else
	      	Uart_SendByte(0,key|0x0030);
	       Uart_SendByte(0,0x2c);
	}

return 0;
}
unsigned short  MyGetScanKey()
{
	unsigned short key;
	unsigned int i,temp;
	for(i=1;i<0x10;i<<=1){
		rPDATE|=0xf0;
		rPDATE&=~(i<<4);
		key<<=4;
		Delay(10);
		temp=rPDATC;
		key|=(temp&0xf);
	}
	return key;
}
unsigned int  MyGetKey()
{
	int i;
	unsigned short key,tempkey=1;
	static unsigned short  oldkey=0xffff;
	static unsigned char  keystatus=0;
	unsigned char  keycnt=0;
	while(1){
		key=0xffff;
		while(1){
			key=MyGetScanKey();
			if(key!=0xffff)
				break;
			Delay(200);
			oldkey=0xffff;
			}
		Delay(500);
		if(key!=MyGetScanKey())
			continue;

		if(oldkey!=key){
			keystatus=0;
		}
		if(keystatus==0){	//第一次按下此键
			keycnt=0;
			keystatus=1;
		}
		else if(keystatus==1){	//第二次重复此键
			keycnt++;
			if(keycnt==20)
				keystatus=2;
			else
				continue;
		}

		oldkey=key;
		break;
	}
	
	for(i=0;i<16;i++){	//查找按键，不包括功能键
		if((key&tempkey)==0)
			break;
		tempkey<<=1;
	}
	return MykeyBoard_KeyMap[i];
}