嵌入式软件构件：TMR计时器管理、CLK实时时钟、KEY键盘扫描、LED数码显示、LCD显示、COMM串口通信

				/*****************************************************************************
				 *   target.c:  Target C file for NXP LPC23xx/24xx Family Microprocessors
				 *
				 *   Copyright(C) 2006, NXP Semiconductor
				 *   All rights reserved.
				 *
				 *   History
				 *   2006.07.13  ver 1.00    Prelimnary version, first Release
				 *
				*****************************************************************************/
				#include "LPC23xx.h"
				#include "type.h"
				#include "irq.h"
				#include "target.h"
				
				/******************************************************************************
				** Function name:		TargetInit
				**
				** Descriptions:		Initialize the target board; it is called in a necessary 
				**						place, change it as needed
				**
				** parameters:			None
				** Returned value:		None
				** 
				******************************************************************************/
				void TargetInit(void)
				{
				    /* Add your codes here */
				    return;
				}
				
				/******************************************************************************
				** Function name:		GPIOResetInit
				**
				** Descriptions:		Initialize the target board before running the main() 
				**				function; User may change it as needed, but may not 
				**				deleted it.
				**
				** parameters:			None
				** Returned value:		None
				** 
				******************************************************************************/
				void GPIOResetInit( void )
				{
					/* Reset all GPIO pins to default: primary function */
				    PINSEL0 = 0x00000000;
				    PINSEL1 = 0x00000000;
				    PINSEL2 = 0x00000000;
				    PINSEL3 = 0x00000000;
				    PINSEL4 = 0x00000000;
				    PINSEL5 = 0x00000000;
				    PINSEL6 = 0x00000000;
				    PINSEL7 = 0x00000000;
				    PINSEL8 = 0x00000000;
				    PINSEL9 = 0x00000000;
				    PINSEL10 = 0x00000000;
				    
				    IODIR0 = 0x00000000;
				    IODIR1 = 0x00000000;
					IOSET0 = 0x00000000;
				    IOSET1 = 0x00000000;
				    
				    FIO0DIR = 0x00000000;
				    FIO1DIR = 0x00000000;
				    FIO2DIR = 0x00000000;
				    FIO3DIR = 0x00000000;
				    FIO4DIR = 0x00000000;
				    
				    FIO0SET = 0x00000000;
				    FIO1SET = 0x00000000;
				    FIO2SET = 0x00000000;
				    FIO3SET = 0x00000000;
				    FIO4SET = 0x00000000;
				    return;        
				}
				
				/******************************************************************************
				** Function name:		ConfigurePLL
				**
				** Descriptions:		Configure PLL switching to main OSC instead of IRC
				**						at power up and wake up from power down. 
				**						This routine is used in TargetResetInit() and those
				**						examples using power down and wake up such as
				**						USB suspend to resume, ethernet WOL, and power management
				**						example
				** parameters:			None
				** Returned value:		None
				** 
				******************************************************************************/
				void ConfigurePLL ( void )
				{
					DWORD MValue, NValue;
				
					if ( PLLSTAT & (1 				    {
						PLLCON = 1;			/* Enable PLL, disconnected */
						PLLFEED = 0xaa;
						PLLFEED = 0x55;
				    }
				
				    PLLCON = 0;				/* Disable PLL, disconnected */
				    PLLFEED = 0xaa;
				    PLLFEED = 0x55;
				    
					SCS |= 0x20;			/* Enable main OSC */
				    while( !(SCS & 0x40) );	/* Wait until main OSC is usable */
				
				    CLKSRCSEL = 0x1;		/* select main OSC, 12MHz, as the PLL clock source */
				
				    PLLCFG = PLL_MValue | (PLL_NValue 				    PLLFEED = 0xaa;
				    PLLFEED = 0x55;
				      
				    PLLCON = 1;				/* Enable PLL, disconnected */
				    PLLFEED = 0xaa;
				    PLLFEED = 0x55;
				
				    CCLKCFG = CCLKDivValue;	/* Set clock divider */
				#if USE_USB
				    USBCLKCFG = USBCLKDivValue;		/* usbclk = 288 MHz/6 = 48 MHz */
				#endif
				
				    while ( ((PLLSTAT & (1 				    
				    MValue = PLLSTAT & 0x00007FFF;
				    NValue = (PLLSTAT & 0x00FF0000) >> 16;
				    while ((MValue != PLL_MValue) && ( NValue != PLL_NValue) );
				
				    PLLCON = 3;				/* enable and connect */
				    PLLFEED = 0xaa;
				    PLLFEED = 0x55;
					while ( ((PLLSTAT & (1 					return;
				}
				
				/******************************************************************************
				** Function name:		TargetResetInit
				**
				** Descriptions:		Initialize the target board before running the main() 
				**						function; User may change it as needed, but may not 
				**						deleted it.
				**
				** parameters:			None
				** Returned value:		None
				** 
				******************************************************************************/
				void TargetResetInit(void)
				{
				#ifdef __DEBUG_RAM    
				    MEMMAP = 0x2;			/* remap to internal RAM */
				#endif
				
				#ifdef __DEBUG_FLASH    
				    MEMMAP = 0x1;			/* remap to internal flash */
				#endif
				
				#if USE_USB
					PCONP |= 0x80000000;		/* Turn On USB PCLK */
				#endif
					/* Configure PLL, switch from IRC to Main OSC */
					ConfigurePLL();
				
				  /* Set system timers for each component */
				#if (Fpclk / (Fcclk / 4)) == 1
				    PCLKSEL0 = 0x00000000;	/* PCLK is 1/4 CCLK */
				    PCLKSEL1 = 0x00000000;
				#endif
				#if (Fpclk / (Fcclk / 4)) == 2
				    PCLKSEL0 = 0xAAAAAAAA;	/* PCLK is 1/2 CCLK */
				    PCLKSEL1 = 0xAAAAAAAA;	 
				#endif
				#if (Fpclk / (Fcclk / 4)) == 4
				    PCLKSEL0 = 0x55555555;	/* PCLK is the same as CCLK */
				    PCLKSEL1 = 0x55555555;	
				#endif
				
				    /* Set memory accelerater module*/
				    MAMCR = 0;
				#if Fcclk < 20000000
				    MAMTIM = 1;
				#else
				#if Fcclk < 40000000
				    MAMTIM = 2;
				#else
				    MAMTIM = 3;
				#endif
				#endif
				    MAMCR = 2;
				
				    GPIOResetInit();
				
					init_VIC();
				    return;
				}
				
				/******************************************************************************
				**                            End Of File
				******************************************************************************/