RTOS (freertos) debug support over STM32CubeIDE

[JBeca.1]

Dear all,

I'm trying to debug FreeRTOS over STM32F7/F3/F4 but I don't get it.

With STLINK gdb server debugger, i can debug but only see 1 task in debugger panel.

I tried with openOCD but it not works...

Anyone do it before?

Thanks

Regards

[Panometric]

You need to add a user defined configuration script:

Here's an example. The key is the last line: "$_TARGETNAME configure -rtos FreeRTOS"

# This is an genericBoard board with a single STM32L476RGTx chip
#
# Generated by STM32CubeIDE
# Take care that such file, as generated, may be overridden without any early notice. Please have a look to debug launch configuration setup(s)
 
source [find interface/stlink.cfg]
 
set WORKAREASIZE 0x8000
 
transport select "hla_swd"
 
set CHIPNAME STM32L476JEYX
 
# Enable debug when in low power modes
set ENABLE_LOW_POWER 1
 
# Stop Watchdog counters when halt
set STOP_WATCHDOG 1
 
# STlink Debug clock frequency
set CLOCK_FREQ 8000
 
# Reset configuration
# use hardware reset, connect under reset
# connect_assert_srst needed if low power mode application running (WFI...)
reset_config srst_only srst_nogate connect_assert_srst
set CONNECT_UNDER_RESET 1
set CORE_RESET 0
 
# BCTM CPU variables
 
source [find target/stm32l4x.cfg]
$_TARGETNAME configure -rtos FreeRTOS

[JBeca.1]

Hi,

thanks for the feedback.

I tried it before, and it not works...

This is my ouptut with OCD debugger

Open On-Chip Debugger 0.10.0+dev-01193-g5ce997d (2020-02-20-10:54)
Licensed under GNU GPL v2
For bug reports, read
	http://openocd.org/doc/doxygen/bugs.html
srst_only separate srst_nogate srst_open_drain connect_assert_srst
Info : The selected transport took over low-level target control. The results might differ compared to plain JTAG/SWD
adapter speed: 8000 kHz
adapter_nsrst_delay: 100
Info : Listening on port 6666 for tcl connections
Info : Listening on port 4444 for telnet connections
Info : clock speed 8000 kHz
Info : STLINK V2J36S26 (API v2) VID:PID 0483:374B
Info : using stlink api v2
Info : Target voltage: 3.235194
Info : SRST line asserted
Warn : Silicon bug: single stepping will enter pending exception handler!
Info : STM32F746ZGTx.cpu: hardware has 8 breakpoints, 4 watchpoints
Info : Listening on port 3333 for gdb connections
Info : accepting 'gdb' connection on tcp/3333
Error: No symbols for FreeRTOS
Info : SRST line released
target halted due to debug-request, current mode: Thread 
xPSR: 0x01000000 pc: 0x08003828 msp: 0x20050000
Info : Unable to match requested speed 8000 kHz, using 4000 kHz
Info : Unable to match requested speed 8000 kHz, using 4000 kHz
adapter speed: 4000 kHz
Info : device id = 0x10016449
Info : flash size = 1024kbytes
Info : SRST line asserted
Info : SRST line released
target halted due to debug-request, current mode: Thread 
xPSR: 0x01000000 pc: 0x08003828 msp: 0x20050000
Info : Unable to match requested speed 8000 kHz, using 4000 kHz
Info : Unable to match requested speed 8000 kHz, using 4000 kHz
adapter speed: 4000 kHz
Info : Padding image section 0 at 0x080001c8 with 8 bytes
target halted due to breakpoint, current mode: Thread 
xPSR: 0x61000000 pc: 0x20000044 msp: 0x20050000
Info : SRST line asserted
Info : SRST line released
target halted due to debug-request, current mode: Thread 
xPSR: 0x01000000 pc: 0x08003828 msp: 0x20050000
Error: Error: null stack pointer in thread
Error: RTOS: failed to get register list
Error: Error: null stack pointer in thread
Error: RTOS: failed to get register list
Error: Error: null stack pointer in thread
Error: RTOS: failed to get register list

[Pavel A.]

Does "ST-LINK GDB server" have an option similar to $_TARGETNAME configure -rtos FreeRTOS ?

Or must use OpenOCD to have RTOS support?

-- pa

[Panometric]

Not that I'm aware. I think OpenOCD is the only way to get thread aware debugging in STM32 with STLINK anyway.

[JBeca.1]

Hi,

correct, only OpenOCD has multitask debug support.

ST-LINK GDB is an option to debug, but you only see 1 task.

@Panometric​ any idea about OpenOCD not works in my case?

Thanks

Regards

Jordi

[Panometric]

@JBeca.1 I don't see that error. It suggests your RTOS is not linked in. I did notice this other part that I had applied though.

Put this in a .C file:

#include "FreeRTOS.h"
 
#ifdef __GNUC__
#define USED __attribute__((used))
#else
#define USED
#endif
 
const int USED uxTopUsedPriority = configMAX_PRIORITIES - 1;

 And put this in the linker settings:

-Wl,--undefined=uxTopUsedPriority

And here's the guide I used to figure it out.

https://mcuoneclipse.com/2016/04/09/freertos-thread-debugging-with-eclipse-and-openocd/

[JBeca.1]

HI @Panometric​ ,

thanks for your support. I tried it... but it doesn't work.

I added the code in main.c

And the linker setting I added in build options (see image)

I can "enter in debug mode" but debugger not works. The eclipse show that app is running, but I can't resume, stop, step, ... and board doesn't do a nything

I attach the console output

Thanks for your tiem

Regards

Jordi

Open On-Chip Debugger 0.10.0+dev-01193-g5ce997d (2020-02-20-10:54)
Licensed under GNU GPL v2
For bug reports, read
	http://openocd.org/doc/doxygen/bugs.html
srst_only separate srst_nogate srst_open_drain connect_assert_srst
Info : The selected transport took over low-level target control. The results might differ compared to plain JTAG/SWD
adapter speed: 8000 kHz
adapter_nsrst_delay: 100
Info : Listening on port 6666 for tcl connections
Info : Listening on port 4444 for telnet connections
Info : clock speed 8000 kHz
Info : STLINK V2J36S26 (API v2) VID:PID 0483:374B
Info : using stlink api v2
Info : Target voltage: 3.244649
Info : SRST line asserted
Info : STM32F334R8Tx.cpu: hardware has 6 breakpoints, 4 watchpoints
Info : Listening on port 3333 for gdb connections
Info : accepting 'gdb' connection on tcp/3333
Info : SRST line released
target halted due to debug-request, current mode: Thread 
xPSR: 0x01000000 pc: 0x08000640 msp: 0x20003000
Info : Unable to match requested speed 8000 kHz, using 4000 kHz
Info : Unable to match requested speed 8000 kHz, using 4000 kHz
adapter speed: 4000 kHz
Info : device id = 0x10016438
Info : flash size = 64kbytes
Info : Auto-detected RTOS: FreeRTOS
Info : SRST line asserted
Info : SRST line released
target halted due to debug-request, current mode: Thread 
xPSR: 0x01000000 pc: 0x08000640 msp: 0x20003000
Info : Unable to match requested speed 8000 kHz, using 4000 kHz
Info : Unable to match requested speed 8000 kHz, using 4000 kHz
adapter speed: 4000 kHz
Info : Padding image section 0 at 0x08000188 with 8 bytes
target halted due to breakpoint, current mode: Thread 
xPSR: 0x61000000 pc: 0x2000003a msp: 0x20003000
Info : SRST line asserted
Info : SRST line released
target halted due to debug-request, current mode: Thread 
xPSR: 0x01000000 pc: 0x08000640 msp: 0x20003000
Error: Error reading stack frame from thread
Error: RTOS: failed to get register list
Error: Error reading stack frame from thread
Error: RTOS: failed to get register list

[KOkun.1048]

Please refer to the following link.

https://community.st.com/s/question/0D50X0000BVp8RtSQJ/thread-awareness-debugging-in-freertos-stm32cubeide-110-has-a-bug-for-using-rtos-freertos-on-stlinkopenocd

[JBeca.1]

@KOkun.1048​ 

Hi,

sorry for the delay in my answer.

I check your link, but it not works....

I will answer in the other thread.

Thanks

Jordi