ext_ram.ini

ARM外围FLASH 以及SDRAM烧写程序 完整的程序 可能对大家硬件编程有点帮助

/******************************************************************************/
/* Ext_RAM.INI: External RAM (SDRAM) Initialization File                      */
/******************************************************************************/
// <<< Use Configuration Wizard in Context Menu >>>                           // 
/******************************************************************************/
/* This file is part of the uVision/ARM development tools.                    */
/* Copyright (c) 2005-2006 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(0xFFFFFF60, 0x00000002);      // EBI_CSA: CSA1 support for SDRAM

  _WDWORD(0xFFFFFF90, 0x00000002);      // Init SDRAM
  _WDWORD(0x20000000, 0);
  _WDWORD(0xFFFFFF90, 0x00000004);
  _WDWORD(0x20000000, 0);
  _WDWORD(0x20000000, 0);
  _WDWORD(0x20000000, 0);
  _WDWORD(0x20000000, 0);
  _WDWORD(0x20000000, 0);
  _WDWORD(0x20000000, 0);
  _WDWORD(0x20000000, 0);
  _WDWORD(0x20000000, 0);
  _WDWORD(0xFFFFFF90, 0x00000003);
  _WDWORD(0x20000080, 0);
  _WDWORD(0xFFFFFF94, 0x000002E0);
  _WDWORD(0x20000000, 0);
  _WDWORD(0xFFFFFF98, 0x2188C155);
  _WDWORD(0xFFFFFF90, 0x00000000);
  _WDWORD(0x20000000, 0);

  _WDWORD(0xFFFFFC20, 0x0000FF01);      // PMC PLLB (~60 MHz)
  _WDWORD(0xFFFFFC2C, 0x100F3E05);

  _WDWORD(0xFFFFFC30, 0x00000003);      // Select PLLB as master clock

  _WDWORD(0xFFFFF404, 0xC00000);        // Open PIO for USART2
  _WDWORD(0xFFFFFC10, 0x80100);         // Open USART 2 Clock and TC2
}

Setup();                                // Setup for Init

LOAD Ext_RAM\GraphicAnimation.axf INCREMENTAL   // Download

// <o> Program Entry Point
PC = 0x20000000;                        // Start of SDRAM

g, main