Hello,

I using Segger JLink V6 with GDB Server V3.80a. I have install the Yagarto from 08.04.2008. I use the controller LPC2366.

Sometimes, I can debug, most comes errors like this:

Performing single step...
...Target halted (PC = 0x00005A80)
Reading all registers
Setting breakpoint @ address 0x00005A7C, Size = 4, BPHandle = 0x0006
Starting target CPU...
Debugger requested to halt target...
ERROR: Unable to halt ARM core
Connection to debugger closed !

WARNING: PC of target system has unexpected value of 0xEFFFFFD8 after reset. Resetting target

Writing register (PC = 0x00000000)
Resetting target
Read 4 bytes @ address 0x00000AE0 (Data = 0xE1A03000)
Read 4 bytes @ address 0x4000453C (Data = 0x3AEF5CDE)
WARNING: Failed to read memory @ address 0x3AEF5CDE
Read 4 bytes @ address 0x3AEF5CDE (Data = 0xAAAAAAAA)

My Debug Settings for ARM-ELF-GDB:
target remote localhost:2331
monitor endian little
monitor speed auto
monitor reset
monitor flash download = 1
monitor flash device = LPC2366
monitor long 0xE01FC040 = 1
load
monitor reset

I have set with Eclipse a Breakpoint, then the Debugger or GDB Server generate an Error and the GDB leaves.
Or why is the PC after Reset not at 0x00000000? What is in the address 0x4000453C?

Have I set a wrong parameters for GDB connection?

Thank you very much for any Idea.

Regards Markus.

Apply... I have download and install V3.80c, It working better, but always, when I set a breakpoint at a specific code line, the debugger breaks, then comes this messages from GDB Server:

vvvvvvvvvvvvvvvvvvvvvv
Starting target CPU...
...Breakpoint reached @ address 0x00005AFC
Reading all registers
Removing breakpoint @ address 0x00005AFC, Size = 4
Read 4 bytes @ address 0x00005AFC (Data = 0xE3A03102)
Read 4 bytes @ address 0x400042E8 (Data = 0x00000444)
Read 4 bytes @ address 0x00000444 (Data = 0xEB0011C4)
Setting breakpoint @ address 0x00005B0C, Size = 4, BPHandle = 0x0003
Starting target CPU...
Debugger requested to halt target...
ERROR: Unable to halt ARM core
Connection to debugger closed !


All pending breakpoints removed

J-Link connected
Firmware: J-Link ARM V6
Feature(s): FlashBP, FlashDL, GDB

J-Link found 1 JTAG device, Total IRLen = 4
JTAG ID: 0x4F1F0F0F (ARM7)
ERROR: Unable to halt ARM core
ERROR: Could not connect to target.

J-Link connected
Firmware: J-Link ARM V6
Feature(s): FlashBP, FlashDL, GDB

Resetting target and trying again to connect...

J-Link found 1 JTAG device, Total IRLen = 4
JTAG ID: 0x4F1F0F0F (ARM7)
^

The J-Link make a reconnect ?

After this code line, it hang:
// >>> #define MAC_BASE_ADDR 0xFFE00000 /* AHB Peripheral # 0 */
// >>> #define MAC_MAC1 (*(volatile unsigned int *)(MAC_BASE_ADDR + 0x000)) /* MAC config reg 1 */
// >>> #define MAC1_PASS_ALL 0x00000002 /* Pass All Receive Frames */
/* Initialize MAC control registers. */
MAC_MAC1 = MAC1_PASS_ALL;

If I make a double Klick in the Eclipse Editor for set a breakpoint, then comes the error.

I have no idea, what is wrong at this code line.

Regards, Markus.