Re: Help using SystemView on an STM32 Nucleo board with re-flashed ST-Link #stm32 #jlink


Raúl Sánchez Siles
 

  Hello:


  I remembered that Anas Nashif wrote a post about this subject:

https://www.planux.com/index.php/2018/08/21/tracing-zephyr-applications-with-segger-systemview/ 


  HTH, Regards,


El domingo, 4 de abril de 2021 3:15:14 (CEST) carlos.rodriguez via lists.zephyrproject.org escribió:

 

Hello:

 

I was wondering if the community could help me with using SystemView with Zephyr. 

 

When I connect to the board using JLink and then try to record with Systemview, I get a message telling me that the RTT control block was not detected.  If I force the call to SEGGER_SYSVIEW_Start() by either setting CONFIG_SEGGER_SYSTEMVIEW_BOOT_ENABLE=y or by putting it in my main function, what I get instead is a message to the effect that it can't find the SystemView buffer.

 

I believe I've been following the instructions correctly as outlined here:

 

https://docs.zephyrproject.org/2.4.0/guides/debugging/probes.html?highlight=segger.

 

and here

 

https://docs.zephyrproject.org/1.9.0/samples/subsys/debug/sysview/README.html

 

I am using Zephyr 2.4.9 with the 0.11.4 SDK on Ubuntu 20.4.

 

For the image, I am using the hello_world example and adding the following to the prj.conf file:

 

CONFIG_TRACING=y

CONFIG_SEGGER_SYSTEMVIEW=y

CONFIG_THREAD_NAME=y

CONFIG_USE_SEGGER_RTT=y

CONFIG_SEGGER_SYSTEMVIEW_BOOT_ENABLE=y

CONFIG_STDOUT_CONSOLE=y

 

It's interesting to note that JLink itself appears to connect just fine:

 

 Connecting to target via SWD

 Found SW-DP with ID 0x4BA01477

 STM32 (Protection Detection): Unexpected IDCODE DEV_ID 0x 461 found. Only checking the 1st flash bank for write protection.

 Found SW-DP with ID 0x4BA01477

 DPv0 detected

 Scanning AP map to find all available APs

 AP[1]: Stopped AP scan as end of AP map has been reached

 AP[0]: AHB-AP (IDR: 0x24770011)

 Iterating through AP map to find AHB-AP to use

 AP[0]: Core found

 AP[0]: AHB-AP ROM base: 0xE00FF000

 CPUID register: 0x410FC241. Implementer code: 0x41 (ARM)

 Found Cortex-M4 r0p1, Little endian.

 FPUnit: 6 code (BP) slots and 2 literal slots

 CoreSight components:

 ROMTbl[0] @ E00FF000

 ROMTbl[0][0]: E000E000, CID: B105E00D, PID: 000BB00C SCS-M7

 ROMTbl[0][1]: E0001000, CID: B105E00D, PID: 003BB002 DWT

 ROMTbl[0][2]: E0002000, CID: B105E00D, PID: 002BB003 FPB

 ROMTbl[0][3]: E0000000, CID: B105E00D, PID: 003BB001 ITM

 ROMTbl[0][4]: E0040000, CID: B105900D, PID: 000BB9A1 TPIU

 ROMTbl[0][5]: E0041000, CID: B105900D, PID: 000BB925 ETM

 Cortex-M4 identified.

 J-Link>

 

I am working on a Nucleo-L496ZG board, but the same thing happens on a Nucleo-F429Zi or a Nucleo-L4R5zi.  I am following the SEGGER instructions to flash the onboard ST-Links with JLink firmware, which appears to work fine.

 

Any help will be appreciated.

 

Best regards:

 

-Carlos Rodriguez.


--

Raúl Sánchez Siles


SW Engineer


K-LAGAN EID

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