key.c

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//#include "..\demo\def.h"


void key_init()
{
	enable_interrupts(GLOBAL);
	enable_interrupts(INT_RB);
	input(key1);
	input(key2);
	input(key3);
	input(key4);
}
//==============================================
int8 get_key()
{
	key_init();
	if(bit_key_prss)
	{
		keyval = keyval>>4;
		keyval &= 0x0f;
		bit_key_prss = 0;
	}
	else
	{
		keyval = 0xff;
	}
	return(keyval);
}
//==============================================
void Test_key()
{
	bit_key_prss = 0;
	puts("please press a key in board.ESC to escape\n");
	key_init();
	while(TRUE)
	{	
		if(bit_key_prss)
		{
			keyval = keyval>>4;
			keyval &= 0x0f;
			switch(keyval)
				{
					case 0x07:
						printf("key1 pressed\n");
						break;
					case 0x0b:
						printf("key2 pressed\n");
						break;
					case 0x0d:
						printf("key3 pressed\n");
						break;
					case 0x0e:
						printf("key4 pressed\n");
						break;
					default:
						break;
				}
			//	while((input_b() & 0xf0) != 0xf0);
				bit_key_prss = 0;
			//	enable_interrupts(int_rb);		
			}
		if(kbhit())
		{
			if(getc()==ESC_KEY)
			{
				disable_interrupts(GLOBAL);
				disable_interrupts(INT_RB);
				return;
			}
		}
	}
}
#int_rb
void service_rb()
{	
	if(bit_key_prss)
		return;
	keyval = input_b();
	keyval &= 0xf0;
	if(keyval == 0xf0)
		return;
	bit_key_prss = 1;
}