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Date of registration: Oct 30th 2015

Posts: 1


Thursday, May 5th 2016, 7:55pm

[SOLVED] AM3352 DBGEN is not asserted error

I'm using a J-Link Pro to debug a AM3352 based board. Sometimes when I try to connect from CodeBench I get an error that tells me that since DBGEN is not asserted, no debugging is possible. Once the board is in this condition, I can't force it out of it. Complete power cycling, changing to another J-Link Pro, etc doesn't seem to make a difference. Then suddenly (after multiple hours) it will start working again and I can emulate. I tried the script that is mentioned in http://forum.segger.com/index.php?page=Thread&postID=3166&highlight=DBGEN#post3166 but that didn't work even after I updated the script to cater for the different ID's returned by the AM3352.

Any suggestions what to do next?

This is what the result is of an attempt to connect to the target with jlink.exe looks like:-

C:\Program Files (x86)\SEGGER\JLink_V512e>jlink
SEGGER J-Link Commander V5.12e (Compiled Apr 29 2016 15:04:36)
DLL version V5.12e, compiled Apr 29 2016 15:03:58

Connecting to J-Link via USB...O.K.
Firmware: J-Link Pro V4 compiled Mar 29 2016 18:47:17
Hardware version: V4.00
S/N: 174301807
License(s): RDI, FlashBP, FlashDL, JFlash, GDB
IP-Addr: DHCP (no addr. received yet)
VTref = 3.348V

Type "connect" to establish a target connection, '?' for help
Please specify device / core. <Default>: AM3352
Type '?' for selection dialog
Please specify target interface:
J) JTAG (Default)
Device position in JTAG chain (IRPre,DRPre) <Default>: -1,-1 => Auto-detect
Specify target interface speed [kHz]. <Default>: 4000 kHz
Device "AM3352" selected.

Could not measure total IR len. TDO is constant high.
TotalIRLen = 6, IRPrint = 0x01
TotalIRLen = 10, IRPrint = 0x0011
CoreSight AP[0]: 0x04770001, AHB-AP
CoreSight AP[1]: 0x04770002, APB-AP
CoreSight AP[2]: 0x04760000, JTAG-AP
Found Cortex-A8 r3p2
6 code breakpoints, 2 data breakpoints
Debug architecture ARMv7.0
TotalIRLen = 6, IRPrint = 0x01
TotalIRLen = 10, IRPrint = 0x0011

****** Error: Cortex-A/R (connect): Core internal signal DBGEN is not asserted. Debugging is not possible.
TotalIRLen = 6, IRPrint = 0x01
TotalIRLen = 10, IRPrint = 0x0011
TotalIRLen = 6, IRPrint = 0x01
TotalIRLen = 10, IRPrint = 0x0011
Can not connect to target.
Kind Regards,

SEGGER - Niklas

Super Moderator

Date of registration: Oct 6th 2014

Posts: 1,691


Friday, May 6th 2016, 3:31pm

Hi Vinny,

I answered your mail regarding this issue.

Best regards,
Would you like to be added to the J-Link software update notification list, so you get informed automatically when a new version becomes available?
Just write me a PM or in case you want to subscribe to it yourself, please use this link: Link
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