ext_sdram.ini

开发板AT91SAM9260-EK的测试程序

/******************************************************************************/
/* Ext_SDRAM.INI: External SDRAM Initialization File                          */
/******************************************************************************/
// <<< Use Configuration Wizard in Context Menu >>>                           // 
/******************************************************************************/
/* This file is part of the uVision/ARM development tools.                    */
/* Copyright (c) 2005-2007 Keil Software. All rights reserved.                */
/* This software may only be used under the terms of a valid, current,        */
/* end user licence from KEIL for a compatible version of KEIL software       */
/* development tools. Nothing else gives you the right to use this software.  */
/******************************************************************************/


FUNC void Setup (void) {

  _WDWORD(0xFFFFF804, 0xFFFF0000);      // PIOC_PDR: Enable Peripheral Mode  

  _WDWORD(0xFFFFEF1C, 0x0001003A);      // EBI_CSA:  CSA1 support for SDRAM

  _WDWORD(0xFFFFEA08, 0x85227259);      // Init SDRAM
  _sleep_(10);                          // Wait for 10 ms
  _WDWORD(0xFFFFEA00, 0x00000002);
  _WDWORD(0x20000000, 0x00000000);
  _sleep_(10);                          // Wait for 10 ms
  _WDWORD(0xFFFFEA00, 0x00000004);
  _WDWORD(0x20000004, 0x00000001);
  _WDWORD(0xFFFFEA00, 0x00000004);
  _WDWORD(0x20000008, 0x00000002);
  _WDWORD(0xFFFFEA00, 0x00000004);
  _WDWORD(0x2000000C, 0x00000003);
  _WDWORD(0xFFFFEA00, 0x00000004);
  _WDWORD(0x20000010, 0x00000004);
  _WDWORD(0xFFFFEA00, 0x00000004);
  _WDWORD(0x20000014, 0x00000005);
  _WDWORD(0xFFFFEA00, 0x00000004);
  _WDWORD(0x20000018, 0x00000006);
  _WDWORD(0xFFFFEA00, 0x00000004);
  _WDWORD(0x2000001C, 0x00000007);
  _WDWORD(0xFFFFEA00, 0x00000004);
  _WDWORD(0x20000020, 0x00000008);
  _WDWORD(0xFFFFEA00, 0x00000003);
  _WDWORD(0x20000024, 0xCAFEDEDE);

  _WDWORD(0xFFFFEA04, 0x0000011F);      // Refresh for SDRAM (at 18.432 MHz)

  _WDWORD(0xFFFFEA00, 0x00000000);
  _WDWORD(0x20000000, 0x00000000);

  // <o> Program Entry Point
  PC = 0x20000000;
}

// Switching from Slow Clock to Main Oscillator for faster Download
_WDWORD(0xFFFFFC20, 0x00000601);        // PMC_MOR:  Enable Main Oscillator
_sleep_(10);                            // Wait for stable Main Oscillator
_WDWORD(0xFFFFFC30, 0x00000001);        // PMC_MCKR: Switch to Main Oscillator

_WDWORD(0xFFFFFD44, 0x00008000);        // WDT_MR:   Disable Watchdog

_WDWORD(0xFFFFEF00, 0x00000003);        // MATRIX_MRCR: Remap (for SAM9260)

Setup();                                // Setup for Init

LOAD Ext_SDRAM\Blinky.axf INCREMENTAL   // Download

g, main