LPC1769 JLINK fail to read memory

haipengyan — Thu, 05 Jan 2017 23:40:36 GMT

Hi,

I have NXP PNEV512B (blueboard) and LPCXpresso1769 board for NFC development. I downloaded example library for NFC and tested with on-board debugger which everything runs fine. When I switched to J-link debugger (and shorted "on-board debugger" jumper). I received the following messages from J-link

SEGGER J-Link GDB Server V6.12c GUI Version

Target voltage: 3.30 V
Listening on TCP/IP port 2331
Connecting to target...
J-Link found 1 JTAG device, Total IRLen = 4
JTAG ID: 0x4BA00477 (Cortex-M3)
Connected to target
Waiting for GDB connection...Connected to 127.0.0.1
Reading all registers
Read 4 bytes @ address 0x00000000 (Data = 0x10008000)
Read 4 bytes @ address 0x00000000 (Data = 0x10008000)
Read 4 bytes @ address 0x00000000 (Data = 0x10008000)
WARNING: Failed to read memory @ address 0xFFFFFFF4
WARNING: Failed to read memory @ address 0xFFFFFFF4
Downloading 4096 bytes @ address 0x00000000
Downloading 988 bytes @ address 0x00001000
Writing register (PC = 0x44010000)
Read 4 bytes @ address 0x00000144 (Data = 0x4C1CB570)
Starting target CPU...
...Target halted (DBGRQ, PC = 0x00000ADE)

Could someone help? Jlink connection seems to be fine. What went wrong?

Many Thanks

Haipeng

Original Attachment has been moved to: JLinkGDB.log.zip

Re: LPC1769 JLINK fail to read memory

kerryzhou — Mon, 09 Jan 2017 06:47:39 GMT

Hi Haipeng,

Please try to download this lpcopen code for IAR and MDK:

http://www.nxp.com/assets/downloads/data/en/software/lpcopen_2_10_keil_iar_nxp_lpcxpresso_1769.zip

Then use your JLINK to download the code in the IAR or MDK project to the LPCXpresso LPC1769 board, whether that can be ok?

If yes, this problem maybe caused by the JLINK GDB, you need to contact with Segger, they may from the JLINKGDB side give more professional answer.

About the JLINK GDB, you can contact with Segger from this link:

Main Page - SEGGER Forum

Wish it helps you!

If you still have question about the LPC, please let me know!
Have a great day,
Kerry

-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------

LPC Microcontrollers中的主题 Re: LPC1769 JLINK fail to read memory

LPC1769 JLINK fail to read memory

Re: LPC1769 JLINK fail to read memory