target.c

nxp lpc23/24xx common keil例程 通用文件

/*****************************************************************************
 *   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 << 25) )
  {
	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 << 16);
  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 << 26)) == 0) );	/* Check lock bit status */
    
  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 << 25)) == 0) );	/* Check connect bit status */
  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
******************************************************************************/