keyboard_test.c

Embest EudKit-II教学系统配Samsung S3C2410处理器的部分测试程序。

/*********************************************************************************************
* File name:	keyboard.c
* Author:		Embest
* Descript:		keyboard source code. 
* History:
*				Y.J.Guo, Programming start, April 4, 2005
*********************************************************************************************/

/*------------------------------------------------------------------------------------------*/
/*	 								include files						 				    */
/*------------------------------------------------------------------------------------------*/
#include "2410lib.h"
#include "iic_keybd.h"

/*------------------------------------------------------------------------------------------*/
/*	 								function declare										*/
/*------------------------------------------------------------------------------------------*/
void keyboard_test(void);
void keyboard_int(void);// __attribute__ ((interrupt ("IRQ")));
UINT8T key_set(UINT8T ucChar);
extern void isrEINT1(void);

static	char f_nKeyPress=0;

/*********************************************************************************************
* name:		keyboard_init
* func:		keyboard initialize
* para:		none
* ret:		none
* modify:
* comment:		
*********************************************************************************************/
void keyboard_init(void)
{
	int i;
	
	// initiaze the 8led-function first of ZLG7290 (more to see ZLG7290.pdf)
	// precent the invalid sign generated while keyboard-function
	iic_init_8led();	
	for(i=0; i<8; i++)
	{
		iic_write_8led(0x70, 0x10+i, 0xFF);		// write data to DpRam0~DpRam7(Register of ZLG7290)
		delay(5);
	}

	iic_init_keybd();							// enable IIC and EINT1 int
	// set EINT1 interrupt handler
    pISR_EINT1 = (int)isrEINT1;//keyboard_int;
}

/*********************************************************************************************
* name:		keyboard_test
* func:		test keyboard
* para:		none
* ret:		none
* modify:
* comment:		
*********************************************************************************************/
void keyboard_test(void)
{
	UINT8T ucChar;
	UINT8T szBuf[40];
	
	uart_printf("\n Keyboard Test Example\n");
	uart_printf(" Press any key to exit...\n");
	keyboard_init();
	
	g_nKeyPress=0xFE;
	while(1)
	{
		f_nKeyPress = 0;
		while(f_nKeyPress==0)
		{
			if(uart_getkey())					// Press any key from UART0 to exit
				return;
			else if(ucChar==7)					// or press 5x4 Key-7 to exit
				return;
			else if(g_nKeyPress!=0xFE)			// or SB1202/SB1203 to exit
				return;
		}
		iic_read_keybd(0x70, 0x1, &ucChar);		// get data from ZLG7290
		if(ucChar != 0)
		{
			ucChar = key_set(ucChar);			// key map for EduKitII
			if(ucChar<16)
				sprintf(&szBuf, " press key %d",ucChar);
			else if(ucChar<255)
				sprintf(&szBuf, " press key %c",ucChar);
				
			if(ucChar==0xFF) 
				sprintf(&szBuf, " press key FUN");
				
			#ifdef BOARDTEST
			print_lcd(200,170,0x1c,&szBuf);	
			#endif
			uart_printf(szBuf);
			uart_printf("\n");
		}
		
	}
	
	uart_printf(" end.\n");
}

/*********************************************************************************************
* name:		key_set
* func:		keyboard setting
* para:		none
* ret:		none
* modify:
* comment:		
*********************************************************************************************/
UINT8T key_set(UINT8T ucChar)
{
	switch(ucChar)
	{
		case 1:
		case 2:
		case 3:
		case 4:
		case 5:
				ucChar-=1; break;
		case 9:
		case 10:
		case 11:
		case 12:
		case 13:
				ucChar-=4; break;
		case 17:
		case 18:
		case 19:
		case 20:
		case 21:
				ucChar-=7; break;
		case 25: ucChar = 0xF; break;
		case 26: ucChar = '+'; break;
		case 27: ucChar = '-'; break;
		case 28: ucChar = '*'; break;
		case 29: ucChar = 0xFF; break;
		default: ucChar = 0;
	}
	return ucChar;
}
/*********************************************************************************************
* name:		keyboard_int
* func:		keyboard interrupt handler
* para:		none
* ret:		none
* modify:
* comment:		
*********************************************************************************************/
void keyboard_int(void)
{
    UINT8T ucChar;
    ClearPending(BIT_EINT1);
    f_nKeyPress = 1;

#ifdef BOARDTEST
	g_nKeyPress = 0xFE;
#endif
}