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I'm trying to get the segger systemview working on a STM32L073RZ nucle board with FreeRTOS. I have verified that freertos is working fine with the MCU as I could create 2 tasks and run them independentitly. But as soon as I try adding the Systemview and RTT source files I keep getting error.

These are the file versions that I'm using in this project.

FreeRTOS version FreeRTOSv202406.04-LTS (FreeRTOS Kernel V11.1.0)
STM32Cubeide version 1.19.0
STM32L0 FW package STM32Cube FW_L0 V1.12.3
MCU Reference STM32L073RZTx
Segger Systemview target source Release V3.60e

These are the errors I keep on getting.

Description Resource    Path    Location    Type
make: *** [makefile:70: FreeRTOS_Base_STM32L0.elf] Error 1  FreeRTOS_Base_STM32L0           C/C++ Problem
undefined reference to `SEGGER_SYSVIEW_X_GetTimestamp'  FreeRTOS_Base_STM32L0       line 0, external location: C:\Users\SESA674736\OneDrive - Schneider Electric\Documents\STM32CubeIDE\FreeRTOS_workspace\FreeRTOS_Base_STM32L0\ThirdParty\SEGGER\SEGGER\SEGGER_SYSVIEW.c:1456 C/C++ Problem
undefined reference to `SEGGER_SYSVIEW_X_GetTimestamp'  FreeRTOS_Base_STM32L0       line 0, external location: C:\Users\SESA674736\OneDrive - Schneider Electric\Documents\STM32CubeIDE\FreeRTOS_workspace\FreeRTOS_Base_STM32L0\ThirdParty\SEGGER\SEGGER\SEGGER_SYSVIEW.c:2107 C/C++ Problem
undefined reference to `SEGGER_SYSVIEW_X_GetTimestamp'  FreeRTOS_Base_STM32L0       line 0, external location: C:\Users\SESA674736\OneDrive - Schneider Electric\Documents\STM32CubeIDE\FreeRTOS_workspace\FreeRTOS_Base_STM32L0\ThirdParty\SEGGER\SEGGER\SEGGER_SYSVIEW.c:657  C/C++ Problem
undefined reference to `SEGGER_SYSVIEW_X_GetTimestamp'  FreeRTOS_Base_STM32L0       line 0, external location: C:\Users\SESA674736\OneDrive - Schneider Electric\Documents\STM32CubeIDE\FreeRTOS_workspace\FreeRTOS_Base_STM32L0\ThirdParty\SEGGER\SEGGER\SEGGER_SYSVIEW.c:881  C/C++ Problem

Not sure whats going wrong, BTW I'm a hardware engineer with limited knowledge of firmware.

Thanks in advance!

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    It seems to be a linker error meaning some lib isn't installed correctly or some of the required paths to all files are wrong. If you check the source for SEGGER_SYSVIEW_X_GetTimestamp then you should get a hint of which file that is the problematic one. Commented Nov 13 at 15:58

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I got it working, it wasn't a linker problem but an implementation problem.

For Segger Systemview to run on ARM CM0 the user needs to implement the SEGGER_SYSVIEW_X_GetTimestamp() function.

While looking for a solution on github I came across this solution. Refer these 2 comits, Commit 866d39c and Commit 8cd0165

Keep in mind the function void xPortSysTickHandler( void ) is renamed to SysTick_Handler( void ) in recent versions of FreeRTOS in the file port.c of CM0

With above implementation its working fine for me, below are the library versions that I'm using.

  • FreeRTOS version FreeRTOSv202406.04-LTS (FreeRTOS Kernel V11.1.0)
  • STM32Cubeide version 1.19.0
  • STM32L0 FW package STM32Cube FW_L0 V1.12.3
  • MCU Reference STM32L073RZTx
  • System Clock 32Mhz
  • Segger Systemview target source Release V3.60e
  • Segger Systemview software V3.62b
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1 Comment

Thanks for sharing. SysTick_Handler would be the "standardized" name from ARM/CMSIS. All of this will be about whom in your toolchain that delivers the "C run-time" (CRT) start-up code (I guess that comes from ST rather than FreeRTOS?). Often SysTick_Handler is implemented as an empty default function with "weak linkage" inside the CRT, so that the user may write their own version of it.

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