target.h

基于FREERtos和LPC2468的程序。里面实现了串口通信

/*****************************************************************************
 *   target.h:  Header file for NXP LPC23xx/24xx Family Microprocessors
 *
 *   Copyright(C) 2006, NXP Semiconductor
 *   All rights reserved.
 *
 *   History
 *   2006.09.20  ver 1.00    Prelimnary version, first Release
 *
******************************************************************************/
#ifndef __TARGET_H 
#define __TARGET_H

#ifdef __cplusplus
   extern "C" {
#endif

#define KEIL_BOARD_LPC23XX         0
#define EA_BOARD_LPC24XX           0
#define OLIMEX_BOARD_LPC2378_EK    1

/* If USB device is used, the CCLK setting needs to be 57.6Mhz, CCO will be 288Mhz
to get precise USB clock 48Mhz. If USB is not used, you set any clock you want
based on the table below. If you want to use USB, change "define USE_USB" from 0 to 1 */
 
/*-----------------------------------------------------------*/
#define	USE_USB					1
/* These are limited number of Fcco configuration for
USB communication as the CPU clock and USB clock shares
the same PLL. The USB clock needs to be multiple of
48Mhz. */
#if USE_USB		/* 1 is USB, 0 is non-USB related */  
/* Fcck = 48Mhz, Fosc = 288Mhz, and USB 48Mhz */
#define PLL_MValue			11
#define PLL_NValue			0
#define CCLKDivValue		5
#define USBCLKDivValue		5

/* System configuration: Fosc, Fcclk, Fcco, Fpclk must be defined */
/* PLL input Crystal frequence range 4KHz~20MHz. */
#define Fosc	12000000
/* System frequence,should be less than 80MHz. */
#define Fcclk	48000000
#define Fcco	288000000

#else

/* Fcck = 60Mhz, Fosc = 360Mhz, USB can't be divided into 48Mhz
in this case, so USBCLKDivValue is not needed. */
#define PLL_MValue			14
#define PLL_NValue			0
#define CCLKDivValue		5

/* System configuration: Fosc, Fcclk, Fcco, Fpclk must be defined */
/* PLL input Crystal frequence range 4KHz~20MHz. */
#define Fosc	12000000
/* System frequence,should be less than 72MHz. */
#define Fcclk	60000000
#define Fcco	360000000

#endif

/* APB clock frequence , must be 1/2/4 multiples of ( Fcclk/4 ). */
/* If USB is enabled, the minimum APB must be greater than 16Mhz */ 
#if USE_USB
#define Fpclk	(Fcclk / 2)
#else
#define Fpclk	(Fcclk / 4)
#endif


/******************************************************************************
** Function name:		TargetInit
**
** Descriptions:		Initialize the target board; it is called in a 
**				necessary place, change it as needed
**
** parameters:			None
** Returned value:		None
**
******************************************************************************/
extern void TargetInit(void);
extern void ConfigurePLL( void );
extern void TargetResetInit(void);

#ifdef __cplusplus
   }
#endif
 
#endif /* end __TARGET_H */
/******************************************************************************
**                            End Of File
******************************************************************************/