STM32Ethernet + STM32FreeRTOS interrupt problems

[ramboerik]

Hi,

My project needs non-blocking Ethernet so I started using this repo with FreeRTOS to achieve that. I soon encountered problems with the interrupt design of the Ethernet implementation. The board always hang in places where the Ethernet implementation uses HAL_GetTick or HAL_Delay from its interrupt. I tracked it down and found that the FreeRTOS system interrupt stopped to get called and FreeRTOS internal ticks was never increased, causing the delays to never end.
I tried to fix the issue by increasing the priority of FreeRTOS's interrupt by never got it to work.

What I found to be a working solution is to skip using the Ethernet interrupt and set up a FreeRTOS task to handle calls to Ethernet.schedule(). Could you add a define to toggle the interrupt behavior on/off for use with FreeRTOS? or is there any better way to handle this?

[fpistm]

I guess you talk about this line:

STM32Ethernet/src/utility/stm32_eth.cpp

Line 276 in 87a5de5

if((HAL_GetTick() - gEhtLinkTickStart) >= TIME_CHECK_ETH_LINK_STATE) {

You're right this library is not really RTOS compatible.
I think a better way would be to avoid using HAL_GetTick() and/or maybe add some RTOS implementation to avoid those issues.

[ramboerik]

I will probably hit them all sooner or later but the one i got stuck on now is HAL_Delay in:
https://github.com/stm32duino/Arduino_Core_STM32/blob/ea8664573c69acf7673103b6ef198ef4b22d00b9/system/Drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_eth.c#L1684

Another thing that didn't work by unknown reason is the rand() call in:
https://github.com/stm32duino/LwIP/blob/484e6bbe4f74c6b8f4d73361963b0f7e0d29fb22/src/core/ipv4/dhcp.c#L1913
I had to compile with -DDHCP_CREATE_RAND_XID=0 to get a DHCP lease without deadlock.

I think a better way would be to avoid using HAL_GetTick() and/or maybe add some RTOS implementation to avoid those issues.

Okay, I will continue to use my implementation for now but keep that in mind if I get more problems.

[Ddh012345dhD]

STM32Ethernet and STM32FreeRTOS don't work together in 1 project? How to use them in 1 project?

[tpcorrea]

Hi, everyone. I am running into the same issue in my code here. This issue was set as "Done", but I guess the problem wasn´t fixed, right?

This is my set-up:
self-developed board with STM32F407
Windows 11
VS Code, PlatformIO
stm32duino/STM32duino FreeRTOS@^10.3.2
stm32duino/STM32Ethernet@^1.3.0
stm32duino/STM32duino LwIP@^2.1.2

Is @ramboerik workaround the best solution this far?

Thanks a lot and kind regards,
Tomas

[fpistm]

Hi, everyone. I am running into the same issue in my code here. This issue was set as "Done", but I guess the problem wasn´t fixed, right?

This is my set-up: self-developed board with STM32F407 Windows 11 VS Code, PlatformIO stm32duino/STM32duino FreeRTOS@^10.3.2 stm32duino/STM32Ethernet@^1.3.0 stm32duino/STM32duino LwIP@^2.1.2

Is @ramboerik workaround the best solution this far?

Thanks a lot and kind regards, Tomas

Tested with Arduino IDE and it works. We do not support PIO. Probably a misalignment of the version.

[tpcorrea]

@fpistm, would you be so kind and tell me which LWIP, STM32Ethernet and STM32duino versions you get it working?

Thanks a lot and BR,
Tomas

[fpistm]

I'm always up to date. So last one for all libraries and core.