target.c

NXP LPC系列AMR7的开发程序源码（LCD

/*****************************************************************************
 *   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 <nxp/iolpc2468.h>
#include "type.h"
#include "irq.h"
#include "target.h"

#include <intrinsics.h>

/******************************************************************************
** 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;

  IO0DIR = 0x00000000;
  IO1DIR = 0x00000000;

  FIO0DIR = 0x00000000;
  FIO1DIR = 0x00000000;
  FIO2DIR = 0x00000000;
  FIO3DIR = 0x00000000;
  FIO4DIR = 0x00000000;

  FIO0MASK = 0x00000000;
  FIO1MASK = 0x00000000;
  FIO2MASK = 0x00000000;
  FIO3MASK = 0x00000000;
  FIO4MASK = 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)
{
  /* Set memory accelerater module*/
  MAMCR = 0;
#if Fcclk < 20000000
  MAMTIM = 1;
#else
#if Fcclk < 40000000
  MAMTIM = 2;
#else
  MAMTIM = 3;
#endif
#endif
  MAMCR = 2;

#if USE_USB
  PCONP |= 0x80000000;    /* Turn On USB PCLK */
#endif

  /* 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

  /* Configure PLL, switch from IRC to Main OSC */
  ConfigurePLL();

  GPIOResetInit();

  init_VIC();

  return;
}

/******************************************************************************
**                            End Of File
******************************************************************************/