Hello there, I’ve spent some time debugging my TCP implementation. I’m using TMS570LC435 copy Ethernet driver for FreeRTOS**+**TCP V4.3.2 and static buffer allocation (BufferAllocation_1.c). To test the integration. I implemented a simple echo server. When testing it the TCP handshake worked fine…

[image] posner: This causes the check if( ( xNetworkBufferSemaphore != NULL ) && ( xRequestedSizeBytes <= ( ipconfigNETWORK_MTU + ipSIZE_OF_ETH_HEADER ) ) ) { to fail as ipconfigNETWORK_MTU + ipSIZE_OF_ETH_HEADER is in my case 1514. I assume you are talking about this check which compares aga…

Thank you for your reply. It explained already a lot. It was a bug that was already fixed in the release of V4.3.3 .

When is this BufferAllocation_1.c fix going to be applied to an LTS release, as the current LTS release still references V4.2.6? I’m using the STM32H7, and I’m not even receiving ARP replies because RX buffer allocation is failing. See past bug issues #1276, #1285, etc. Thanks!

[image] rhaber80: as the current LTS release still references V4.2.6? As I see on this page, the current LTS is pointing to 4.4.1: FreeRTOS LTS Libraries - FreeRTOS™ .

Huh, Oh Ok, guess I was looking at the wrong branch then… FreeRTOS-LTS/FreeRTOS at 202604-LTS · FreeRTOS/FreeRTOS-LTS

What STM32 HAL version does the 202604-LTS release utilize? I probably need to update my STM32 driver files to match the driver version used in this release. Still using V1.9.0 which is quite dated. Is this documented anywhere? Thanks!

FreeRTOS Plus TCP wrong frame size with BufferAllocation_1.c

Libraries

aggarg (Gaurav Aggarwal) August 10, 2026, 4:17pm 9

I do not think there is a dependency on the driver version. I’d use with the latest or with whatever you have. Let us know if you face any problem.

Version of STM32 HAL utilized?

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FreeRTOS Plus TCP wrong frame size with BufferAllocation_1.c

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