init_c.c

来自「周立功arm7(lpc2104)的工程模板」· C语言 代码 · 共 139 行

// *********************************
// LPC2000 SYSTEM WITHOUT OS
// FILE:     INIT_C.C
// MODIFIED: ZPCYP 2005-3-16 20:16
// *********************************

#include "config.h"
#include "lpc22xx.h"
#include "serial.h"


void target_init(void) {

  int i;                            // Variables for copying vectors
  int *p1, *p2;

  i = i; p1 = p1; p2 = p2;          // To avoid compiler warning

#if PLL_SETUP > 0

  PLLCFG  = PLLCFG_VAL;
  PLLCON  = 0x01;                   // Enable PLL
  PLLFEED = 0xAA;                   // Feed
  PLLFEED = 0x55;

  while ((PLLSTAT & (1<<10)) == 0); // Wait

  PLLCON  = 0x03;                   // Connect PLL
  PLLFEED = 0xAA;                   // Feed
  PLLFEED = 0x55;

#endif


#if MAM_SETUP > 0

  MAMTIM = MAMTIM_VAL;
  MAMCR  = MAMCR_VAL;

#endif


#if VPBDIV_SETUP > 0

  VPBDIV = VPBDIV_VAL;

#endif


#if MEMMAP_SETUP > 0

  #if MEMMAP_VAL == 0x02            // Note: Check scatter file to make sure that
                                    // spaces for RAM based vectors has been reserved.
    p1 = (int *) 0x00000000;        // From current vectors (always 0x00000000)
    p2 = (int *) 0x40000000;        // To RAM based vectors

    for (i = 0; i < 16; i++) {      // Copy 16 words (64 bytes)
      *p2++ = *p1++;
    }

  #endif

  MEMMAP = MEMMAP_VAL;

#endif


#if EMC_SETUP > 0

  #if BCFG0_SETUP > 0

    BCFG0 = BCFG0_VAL;    

  #endif

  #if BCFG1_SETUP > 0

    BCFG1 = BCFG1_VAL;    

  #endif

  #if BCFG2_SETUP > 0

    BCFG2 = BCFG2_VAL;    

  #endif

  #if BCFG3_SETUP > 0

    BCFG3 = BCFG3_VAL;    

  #endif

#endif


#if PINSEL_SETUP > 0

  #if PINSEL0_SETUP > 0

    PINSEL0 = PINSEL0_VAL;

  #endif

  #if PINSEL1_SETUP > 0

    PINSEL1 = PINSEL1_VAL;

  #endif
  
  #if PINSEL2_SETUP > 0

    PINSEL2 = PINSEL2_VAL;

  #endif

#endif


#if UART0_SETUP > 0                 // Remember to select TXD, RXD pin in config.h

  init_serial_0();

#endif


  PREINT  = F_PCLK / 32768 - 1;     // RTC Setup
  PREFRAC = F_PCLK - (F_PCLK / 32768) * 32768;
  CCR     = 0x01;                   // Enable RTC


  VICIntEnClr  = 0xFFFFFFFF;        // Disable all interrupts at first
  VICIntSelect = 0x00000000;        // All interrupts are IRQs (no FIQ)

}