scan_key_test.c

使用embest IDE开发工具开发的基于LPC2294 的触摸屏开发

/*
***********************************************************************

       Embest Info&Tech Co., Ltd.  All rights reserved.
                     www.embedinfo.com

***********************************************************************

---------------- file information -------------------------------------

file name: scan_key_test.c
version  : v0
author   : z.x.q. Embest
begin    : 2006-04-10
finish   : 2006-04-10
define   : scan_key_test file

notes    :
---------------- modify information -----------------------------------
version  :
modify   :
begin    :
finish   :
define   :
-----------------------------------------------------------------------
*/

/*-------------------------------------------------------------------*/
/*                       include files                               */
/*---------------------------------------------------------------- --*/

#include	"..\..\com\lpc_lib_uart\lpc_lib_uart.h"
#include	"..\..\com\lpc_lib_keyboard\lpc_lib_keyboard.h"
/*-------------------------------------------------------------------*/
/*                       global function/variable declare            */
/*-------------------------------------------------------------------*/
       //the scan key value,initialize with 255,that as a flag (>15)
void key_test(void);
/*-------------------------------------------------------------------*/
/*                       function code                               */
/*-------------------------------------------------------------------*/	
extern INT32U key_data;

void Main(void)
{
	 lpc_init_pll_manual();					//init the pll clock
	 
	VICIntEnClr = 0xffffffff;				
	VICVectAddr = 0;
	VICIntSelect = 0;	
						
	spi_data_send(0, 0xfb);
	spi_data_send(0, 0x56);
	spi_data_send(0, 0xfb);
	spi_data_send(0, 0x56);
	
     uart0_init(57600); 					//set baudrate 19200						
	 uart0_printf("\nwelcome,:)\n"); 
	 
	 key_test();

}

void key_test(void)
{
	INT32U i=0;
	key_init();	
	while(1)
	{	
		if(key_data<16)					//judge key value effectivity
		{	
			uart0_printf("%x,",key_data);
			key_data=255;				
			i++;
			if(i>14)						//10 chars for a line
			{
				uart0_sendch('\n');
				i=0;
				key_close();
			}

		}

	}		
	
}