debugging with Jlink under keil

project : debugging with Jlink under keil
instuction: jlinker settings for QQ2440 board under keil IDE

(1) Firstly, modify the scatter files as following( locate it start at SDRAM: 0x30000000):

scatter file:
; *************************************************************
; *** Scatter-Loading Description File generated by uVision ***
; *************************************************************

LR_ROM1 0x30000000 { ; load region size_region
RO +0 { ; load address = execution address
2440init.o (+RO,+First)
*(InRoot$$Sections)
.ANY (+RO)
}
RW +0 { ; RW data
.ANY (+RW)
}
ZI +0 { ; ZI data
.ANY (+ZI)
}
}
=================================================================

(2) Do not enable the item "Run to main()", because when the target reset, the PC value is 0x00000000, so will change it to 0x30000000 to run.(if not, it can not change the PC register value.)

(3) enter into "SEGGER J-Link RDI V4.02 Congiuration" Dialog and setting as below.
(3.1) General page: USB --> Device 0
(3.2) Init page: macro file as following:
filename: QQ2440.setup:
===================================================================
/*********************************************************************
*
* Macro file for J-LINK RDI
*
**********************************************************************
* File: QQ2440.setup
* Purpose: Setup for S3C2440 chip
**********************************************************************
*/
Write32(0x53000000, 0x00000000);
Write32(0x4A000008, 0xFFFFFFFF);
Write32(0x4A00001C, 0x000007FF);
Write32(0x53000000, 0x00000000);
Write32(0x56000050, 0x000055AA);
Write32(0x4C000014, 0x00000007);
Write32(0x4C000000, 0x00FFFFFF);
Write32(0x4C000004, 0x00061012);
Write32(0x4C000008, 0x00040042);
Write32(0x48000000, 0x22111120);
Write32(0x48000004, 0x00002F50);
Write32(0x48000008, 0x00000700);
Write32(0x4800000C, 0x00000700);
Write32(0x48000010, 0x00000700);
Write32(0x48000014, 0x00000700);
Write32(0x48000018, 0x0007FFFC);
Write32(0x4800001C, 0x00018005);
Write32(0x48000020, 0x00018005);
Write32(0x48000024, 0x008E0459);
Write32(0x48000028, 0x00000032);
Write32(0x4800002C, 0x00000030);
Write32(0x48000030, 0x00000030);

===================================================================

(3.3) JTAG page: JTAG speed --> 12000 kHz
(3.4) Flash page: Disable Flash programming.
(3.5) Breakpoints page: Enable Use software breakpoints.
(3.6) CPU page: Enable Allow instruction set simulation, Little endian. Reset Normal.
(3.7) Log page: None.

Done! Good Luck!