Version 11.2, Segger, Download 'Failure to Read'

[Keith4DSmith]

Using version 11.2 on Windows 10, I am debugging a program ~2MB in size on an iMX RT 1064.

I frequently get an error during the download phase. There was a similar error during download under 10.3, but with less diagnostic information.

Below is the 'J-Link Segger GDB Server' Details reported by 11.2 during a download.

If I repeat the debug session I don't have the error. It always works the second time.

I don't have problems with smaller programs.

WARNING: Target connection lost.
ROMTbl[2][2]: E0002000, CID: B105E00D, PID: 000BB00E FPB-M7
ROMTbl[2][3]: E0000000, CID: B105E00D, PID: 000BB001 ITM
ROMTbl[1][1]: E0041000, CID: B105900D, PID: 001BB975 ETM-M7
ROMTbl[1][2]: E0042000, CID: B105900D, PID: 004BB906 CTI
ROMTbl[0][1]: E0040000, CID: B105900D, PID: 000BB9A9 TPIU-M7
ROMTbl[0][2]: E0043000, CID: B105F00D, PID: 001BB101 TSG
Cache: Separate I- and D-cache.
I-Cache L1: 32 KB, 512 Sets, 32 Bytes/Line, 2-Way
D-Cache L1: 32 KB, 256 Sets, 32 Bytes/Line, 4-Way
Connected to target
Waiting for GDB connection...Connected to 127.0.0.1
Reading all registers
Read 2 bytes @ address 0x700977C8 (Data = 0xB508)
Read 2 bytes @ address 0x70087A04 (Data = 0x4770)
Read 4 bytes @ address 0x700C66A6 (Data = 0x3102E7FE)
Loading RTOS plugin: GDBServer/RTOSPlugin_FreeRTOS...
RTOS plugin (API v1.0) loaded successfully
RTOS plugin: Loaded
Received symbol: pxCurrentTCB (0x202087EC)
Received symbol: pxReadyTasksLists (0x202087F0)
Received symbol: xDelayedTaskList1 (0x20208A70)
Received symbol: xDelayedTaskList2 (0x20208A84)
Received symbol: pxDelayedTaskList (0x20208A98)
Received symbol: pxOverflowDelayedTaskList (0x20208A9C)
Received symbol: xPendingReadyList (0x20208AA0)
Received symbol: xTasksWaitingTermination (0x20208AB4)
Received symbol: xSuspendedTaskList (0x20208ACC)
Received symbol: uxCurrentNumberOfTasks (0x20208AE0)
Received symbol: uxTopUsedPriority (0x00000000)
Received symbol: uxTopReadyPriority (0x20208AE8)
Received symbol: vPortEnableVFP (0x70060E28)
Received symbol: FreeRTOSDebugConfig (0x00000000)
All mandatory symbols successfully loaded.
Connected to 127.0.0.1
Reading all registers
Read 2 bytes @ address 0x700977C8 (Data = 0xB508)
Read 2 bytes @ address 0x70087A04 (Data = 0x4770)
Read 4 bytes @ address 0x700C66A6 (Data = 0x3102E7FE)
Received symbol: pxCurrentTCB (0x202087EC)
Received symbol: pxReadyTasksLists (0x202087F0)
Received symbol: xDelayedTaskList1 (0x20208A70)
Received symbol: xDelayedTaskList2 (0x20208A84)
Received symbol: pxDelayedTaskList (0x20208A98)
Received symbol: pxOverflowDelayedTaskList (0x20208A9C)
Received symbol: xPendingReadyList (0x20208AA0)
Received symbol: xTasksWaitingTermination (0x20208AB4)
Received symbol: xSuspendedTaskList (0x20208ACC)
Received symbol: uxCurrentNumberOfTasks (0x20208AE0)
Received symbol: uxTopUsedPriority (0x00000000)
Received symbol: uxTopReadyPriority (0x20208AE8)
Received symbol: vPortEnableVFP (0x70060E28)
Received symbol: FreeRTOSDebugConfig (0x00000000)
All mandatory symbols successfully loaded.
Received monitor command: reset
Reset: Halt core after reset via DEMCR.VC_CORERESET.
Reset: Reset device via AIRCR.SYSRESETREQ.
Resetting target
Downloading 8192 bytes @ address 0x70000000 - Verified OK
Downloading 15840 bytes @ address 0x70002000 - Verified OK
Downloading 15952 bytes @ address 0x70005DE0 - Verified OK
Downloading 15904 bytes @ address 0x70009C30 - Verified OK
Downloading 15952 bytes @ address 0x7000DA50 - Verified OK
Downloading 16160 bytes @ address 0x700118A0 - Verified OK
Downloading 16208 bytes @ address 0x700157C0 - Verified OK
Downloading 16064 bytes @ address 0x70019710 - Verified OK
Downloading 16160 bytes @ address 0x7001D5D0 - Verified OK
Downloading 16080 bytes @ address 0x700214F0 - Verified OK
Downloading 16080 bytes @ address 0x700253C0 - Verified OK
Downloading 16208 bytes @ address 0x70029290 - Verified OK
Downloading 16144 bytes @ address 0x7002D1E0 - Verified OK
Downloading 16128 bytes @ address 0x700310F0 - Verified OK
Downloading 16112 bytes @ address 0x70034FF0 - Verified OK
Downloading 16128 bytes @ address 0x70038EE0 - Verified OK
Downloading 15904 bytes @ address 0x7003CDE0 - Verified OK
Downloading 16224 bytes @ address 0x70040C00 - Verified OK
Downloading 16240 bytes @ address 0x70044B60 - Verified OK
Downloading 16224 bytes @ address 0x70048AD0 - Verified OK
Downloading 16128 bytes @ address 0x7004CA30 - Verified OK
Downloading 16192 bytes @ address 0x70050930 - Verified OK
Downloading 16192 bytes @ address 0x70054870 - Verified OK
Downloading 16112 bytes @ address 0x700587B0 - Verified OK
Downloading 16096 bytes @ address 0x7005C6A0 - Verified OK
Downloading 16112 bytes @ address 0x70060580 - Verified OK
Downloading 16000 bytes @ address 0x70064470 - Verified OK
Downloading 16048 bytes @ address 0x700682F0 - Verified OK
Downloading 16112 bytes @ address 0x7006C1A0 - Verified OK
Downloading 16160 bytes @ address 0x70070090 - Verified OK
Downloading 16176 bytes @ address 0x70073FB0 - Verified OK
Downloading 15952 bytes @ address 0x70077EE0 - Verified OK
Downloading 16128 bytes @ address 0x7007BD30 - Verified OK
Downloading 16192 bytes @ address 0x7007FC30 - Verified OK
Downloading 16272 bytes @ address 0x70083B70 - Verified OK
Downloading 16080 bytes @ address 0x70087B00 - Verified OK
Downloading 16064 bytes @ address 0x7008B9D0 - Verified OK
Downloading 16032 bytes @ address 0x7008F890 - Verified OK
Downloading 16096 bytes @ address 0x70093730 - Verified OK
Downloading 16048 bytes @ address 0x70097610 - Verified OK
Downloading 16048 bytes @ address 0x7009B4C0 - Verified OK
Downloading 15952 bytes @ address 0x7009F370 - Verified OK
Downloading 16112 bytes @ address 0x700A31C0 - Verified OK
Downloading 16112 bytes @ address 0x700A70B0 - Verified OK
Downloading 16064 bytes @ address 0x700AAFA0 - Verified OK
Downloading 16096 bytes @ address 0x700AEE60 - Verified OK
Downloading 16128 bytes @ address 0x700B2D40 - Verified OK
Downloading 15904 bytes @ address 0x700B6C40 - Verified OK
Downloading 16080 bytes @ address 0x700BAA60 - Verified OK
Downloading 16080 bytes @ address 0x700BE930 - Verified OK
Downloading 16096 bytes @ address 0x700C2800 - Verified OK
Downloading 16256 bytes @ address 0x700C66E0 - Verified OK
Downloading 16240 bytes @ address 0x700CA660 - Verified OK
Downloading 16208 bytes @ address 0x700CE5D0 - Verified OK
Downloading 16256 bytes @ address 0x700D2520 - Verified OK
Downloading 16304 bytes @ address 0x700D64A0 - Verified OK
Downloading 16320 bytes @ address 0x700DA450 - Verified OK
Downloading 16272 bytes @ address 0x700DE410 - Verified OK
Downloading 16288 bytes @ address 0x700E23A0 - Verified OK
Downloading 16320 bytes @ address 0x700E6340 - Verified OK
Downloading 16320 bytes @ address 0x700EA300 - Verified OK
Downloading 16304 bytes @ address 0x700EE2C0 - Verified OK
Downloading 16304 bytes @ address 0x700F2270 - Verified OK
Downloading 16320 bytes @ address 0x700F6220 - Verified OK
Downloading 16320 bytes @ address 0x700FA1E0 - Verified OK
Downloading 16240 bytes @ address 0x700FE1A0 - Verified OK
Downloading 16272 bytes @ address 0x70102110 - Verified OK
Downloading 16208 bytes @ address 0x701060A0 - Verified OK
Downloading 16256 bytes @ address 0x70109FF0 - Verified OK
Downloading 16320 bytes @ address 0x7010DF70 - Verified OK
Downloading 16288 bytes @ address 0x70111F30 - Verified OK
Downloading 16096 bytes @ address 0x70115ED0 - Verified OK
Downloading 16160 bytes @ address 0x70119DB0 - Verified OK
Downloading 16272 bytes @ address 0x7011DCD0 - Verified OK
Downloading 16272 bytes @ address 0x70121C60 - Verified OK
Downloading 16288 bytes @ address 0x70125BF0 - Verified OK
Downloading 16240 bytes @ address 0x70129B90 - Verified OK
Downloading 16272 bytes @ address 0x7012DB00 - Verified OK
Downloading 16288 bytes @ address 0x70131A90 - Verified OK
Downloading 16176 bytes @ address 0x70135A30 - Verified OK
Downloading 16128 bytes @ address 0x70139960 - Verified OK
Downloading 16240 bytes @ address 0x7013D860 - Verified OK
Downloading 16272 bytes @ address 0x701417D0 - Verified OK
Downloading 16272 bytes @ address 0x70145760 - Verified OK
Downloading 16016 bytes @ address 0x701496F0 - Verified OK
Downloading 16080 bytes @ address 0x7014D580 - Verified OK
Downloading 16224 bytes @ address 0x70151450 - Verified OK
Downloading 16304 bytes @ address 0x701553B0 - Verified OK
Downloading 16336 bytes @ address 0x70159360 - Verified OK
Downloading 16304 bytes @ address 0x7015D330 - Verified OK
Downloading 16336 bytes @ address 0x701612E0 - Verified OK
Downloading 16272 bytes @ address 0x701652B0 - Verified OK
Downloading 16288 bytes @ address 0x70169240 - Verified OK
Downloading 16320 bytes @ address 0x7016D1E0 - Verified OK
Downloading 16240 bytes @ address 0x701711A0 - Verified OK
Downloading 16304 bytes @ address 0x70175110 - Verified OK
Downloading 16320 bytes @ address 0x701790C0 - Verified OK
Downloading 16320 bytes @ address 0x7017D080 - Verified OK
Downloading 16208 bytes @ address 0x70181040 - Verified OK
Downloading 16288 bytes @ address 0x70184F90 - Verified OK
Downloading 2856 bytes @ address 0x70188F30 - Verified OK
Downloading 16312 bytes @ address 0x70189A58 - Verified OK
Downloading 16320 bytes @ address 0x7018DA10 - Verified OK
Downloading 16272 bytes @ address 0x701919D0 - Verified OK
Downloading 16288 bytes @ address 0x70195960 - Verified OK
Downloading 16288 bytes @ address 0x70199900 - Verified OK
Downloading 16288 bytes @ address 0x7019D8A0 - Verified OK
Downloading 3408 bytes @ address 0x701A1840 - Verified OK
Downloading 64 bytes @ address 0x701A25C0 - Verified OK
Downloading 16256 bytes @ address 0x701A2600 - Verified OK
Downloading 16256 bytes @ address 0x701A6580 - Verified OK
Downloading 16288 bytes @ address 0x701AA500 - Verified OK
Downloading 16256 bytes @ address 0x701AE4A0 - Verified OK
Downloading 11688 bytes @ address 0x701B2420 - Verified OK
Downloading 8288 bytes @ address 0x701B51C8 - Verified OK
J-Link: Flash download: Bank 0 @ 0x70000000: 3 ranges affected (1179648 bytes)
J-Link: Flash download: Total: 15.772s (Prepare: 0.096s, Compare: 2.791s, Erase: 3.269s, Program & Verify: 9.609s, Restore: 0.005s)
J-Link: Flash download: Program & Verify speed: 119 KB/s
Writing register (PC = 0x70002308)
WARNING: Target connection lost.
WARNING: Failed to read memory @ address 0x700977C8
WARNING: Failed to read memory @ address 0x70087A04
Reading all registers
Read register 0 (4 bytes) from DLL: 582E5103
Read register 1 (4 bytes) from DLL: 582E5103
Read register 2 (4 bytes) from DLL: 582E5103
Read register 3 (4 bytes) from DLL: 582E5103
Read register 4 (4 bytes) from DLL: 582E5103
Read register 5 (4 bytes) from DLL: 582E5103
Read register 6 (4 bytes) from DLL: 582E5103
Read register 7 (4 bytes) from DLL: 582E5103
Read register 8 (4 bytes) from DLL: 582E5103
Read register 9 (4 bytes) from DLL: 582E5103
Read register 10 (4 bytes) from DLL: 582E5103
Read register 11 (4 bytes) from DLL: 582E5103
Read register 12 (4 bytes) from DLL: 582E5103
Read register 13 (4 bytes) from DLL: 582E5103
Read register 14 (4 bytes) from DLL: 582E5103
Read register 15 (4 bytes) from DLL: 582E5103
Read register 16 (4 bytes) from DLL: 582E5103
WARNING: Failed to read memory @ address 0x03512E58
WARNING: Failed to read memory @ address 0x03512E58
Reading 64 bytes @ address 0x70051E00

[Keith4DSmith]

I am using 5'/6' cables.

[Keith4DSmith]

This problem still persists.

It might be reproducible with a smaller program by lowering the J-Link speed.

From 'Debug Configurations...', JLink Debugger tab, Click speed 'fixed' button.

Set speed slow enough that it takes more than 15 seconds to program.

[lpcxpresso_supp]

From what I can see in the log you provided, there's a "target connection lost" right before the memory access failures. Maybe some bad cables? But that does not quite explain the second attempt always working though. In the failing situation, is the debug session still up and target can be controlled?

Greetings,
MCUXpresso IDE Support

[Keith4DSmith]

The debug session is running. It never stopped at 'main', the default breakpoint.

Pressing the 'Pause' button shows the program has executed a hardware fault. This is always the case when the download does not work. I have not verified what at the location of the hardware fault. My suspicion is 0xFFFF FFFF, unprogrammed flash.

To resume, press the 'stop' button and restart the Debug session.

I am working with an iMX RT 1064 using Segger J-Link 6.80d via SWD at 4000kHZ.

[Keith4DSmith]

Let me add that the 'connection lost' seems to occur when the program and verify step takes 15 seconds.

If the program and verify step is < 15 seconds, no error.

I can't say for sure that the time is 15 seconds, but failure occurs when the program and verify step takes many seconds, instead of a few. The program and verify step of the second debug session is short < 5 seconds.

[myke_predko]

Hey @Keith4DSmith ,

This might sound off the wall, but how long a USB cable are you using to connect to your PC to the J-Link?  

I had something similar to what you are describing with a 10' long cable - no problems with using it with a P&E Micro Multilink programmer, but with my J-Link Plus it would die with larger programs.  I reduced the cable length to 5' (what I had on hand) and the problems went away.  

myke