和使用内部RAM一样，关键设置分散加载文件，同时设置JLINK初始化配置文件。

1、新增工程配置组。

2设置分散加载组

3设置ini文件

Ext_Ram内容：

FUNC void SetupForStart (void) {


// <o> Program Entry Point

PC = 0x30000000;

}

FUNC void Init (void) {

_WDWORD(0x4A000008, 0xFFFFFFFF);      // Disable All Interrupts

_WDWORD(0x53000000, 0x00000000);      // Disable Watchdog Timer

// Clock Setup

// FCLK = 300 MHz, HCLK = 100 MHz, PCLK = 50 MHz

_WDWORD(0x4C000000, 0x0FFF0FFF);      // LOCKTIME

_WDWORD(0x4C000014, 0x0000000F);      // CLKDIVN

_WDWORD(0x4C000004, 0x00043011);      // MPLLCON

_WDWORD(0x4C000008, 0x00038021);      // UPLLCON

_WDWORD(0x4C00000C, 0x001FFFF0);      // CLKCON

// Memory Controller Setup for SDRAM

_WDWORD(0x48000000, 0x22000000);      // BWSCON

_WDWORD(0x4800001C, 0x00018005);      // BANKCON6

_WDWORD(0x48000020, 0x00018005);      // BANKCON7

_WDWORD(0x48000024, 0x008404F3);      // REFRESH

_WDWORD(0x48000028, 0x00000032);      // BANKSIZE

_WDWORD(0x4800002C, 0x00000020);      // MRSRB6

_WDWORD(0x48000030, 0x00000020);      // MRSRB7

_WDWORD(0x56000000, 0x000003FF);      // GPACON: Enable Address lines for SDRAM

}

_WDWORD(0x40000000, 0xEAFFFFFE);        // Load RAM addr 0 with branch to itself

CPSR = 0x000000D3;                      // Disable interrupts

PC   = 0x40000000;                      // Position PC to start of RAM

_WDWORD(0x53000000, 0x00000021);        // Enable Watchdog

g, 0                                    // Wait for Watchdog to reset chip

Init();                                 // Initialize memory

LOAD .\output\obj\s3c2440keil.axf INCREMENTAL         // Download program

SetupForStart();                        // Setup for Running

g, main                                 // Goto Main

更改S3C2440.S文件如下：

DCD  ||Image$$ER_ROM1$$RO$$Length||+\

||Image$$RW_RAM1$$RW$$Length||

去调内部RAM运行时给改的I.

4运行调试

5关于分散加载和JLINK初始化文件