61 lines
2.8 KiB
INI
61 lines
2.8 KiB
INI
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/******************************************************************************/
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/* Ext_RAM.INI: External RAM (SDRAM) Initialization File */
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/******************************************************************************/
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// <<< Use Configuration Wizard in Context Menu >>> //
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/******************************************************************************/
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/* This file is part of the uVision/ARM development tools. */
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/* Copyright (c) 2005-2008 Keil Software. All rights reserved. */
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/* This software may only be used under the terms of a valid, current, */
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/* end user licence from KEIL for a compatible version of KEIL software */
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/* development tools. Nothing else gives you the right to use this software. */
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/******************************************************************************/
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FUNC void SetupForStart (void) {
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// <o> Program Entry Point
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PC = 0x30000000;
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}
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FUNC void Init (void) {
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_WDWORD(0x4A000008, 0xFFFFFFFF); // Disable All Interrupts
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_WDWORD(0x53000000, 0x00000000); // Disable Watchdog Timer
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// Clock Setup
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// FCLK = 300 MHz, HCLK = 100 MHz, PCLK = 50 MHz
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_WDWORD(0x4C000000, 0x0FFF0FFF); // LOCKTIME
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_WDWORD(0x4C000014, 0x0000000F); // CLKDIVN
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_WDWORD(0x4C000004, 0x00043011); // MPLLCON
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_WDWORD(0x4C000008, 0x00038021); // UPLLCON
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_WDWORD(0x4C00000C, 0x001FFFF0); // CLKCON
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// Memory Controller Setup for SDRAM
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_WDWORD(0x48000000, 0x22000000); // BWSCON
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_WDWORD(0x4800001C, 0x00018005); // BANKCON6
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_WDWORD(0x48000020, 0x00018005); // BANKCON7
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_WDWORD(0x48000024, 0x008404F3); // REFRESH
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_WDWORD(0x48000028, 0x00000032); // BANKSIZE
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_WDWORD(0x4800002C, 0x00000020); // MRSRB6
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_WDWORD(0x48000030, 0x00000020); // MRSRB7
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_WDWORD(0x56000000, 0x000003FF); // GPACON: Enable Address lines for SDRAM
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}
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// Reset chip with watchdog, because nRST line is routed on hardware in a way
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// that it can not be pulled low with ULINK
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_WDWORD(0x40000000, 0xEAFFFFFE); // Load RAM addr 0 with branch to itself
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CPSR = 0x000000D3; // Disable interrupts
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PC = 0x40000000; // Position PC to start of RAM
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_WDWORD(0x53000000, 0x00000021); // Enable Watchdog
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g, 0 // Wait for Watchdog to reset chip
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Init(); // Initialize memory
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LOAD rtthread-mini2440.axf INCREMENTAL // Download program
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SetupForStart(); // Setup for Running
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g, main // Goto Main
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