Problem with UDP communication while configuring stm32nucleo using cubemx in Simulink

Hello everyone,

I am migrating a Simulink-based project from STM32F767 to STM32H753ZI (Nucleo-H753ZI) and facing persistent issues with UDP Receive and send blocks in Monitor & Tune mode.

Below are the full details of my setup and everything I have already tried.

//Environment

Board: Nucleo-H753ZI MCU: STM32H753ZITx STM32CubeMX version: 6.15.0 Simulink with STM32 support package Host: Windows PC Connection: Ethernet (RMII)

//Working peripherals

PWM (TIM1, TIM4, TIM15) → working I2C (I2C1, I2C2) → working GPIO → working Model runs fine in Monitor & Tune until UDP blocks are enabled

//Problem

When I uncomment the UDP Receive or UDP send block and run Monitor & Tune, Simulink throws the error:

“To use TCP, UDP or MQTT blocks, set the Rx buffer address to 0x30040200 in the STM32CubeMX project.”

This error persists, even though the Rx buffer address is already set correctly.

I have also attached the txt file of the ioc(cubemx) file.

I tried everything I could. Did everything chatgpt asked. But I'm hopeless. If anyone can provide any insight, it would be really helpful.

Answer 1

[Madhu Varshini]

Please refer

STM32H753ZI: Simulink UDP/TCP blocks fail due to Ethernet DMA buffer address requirement (0x30040200) - MATLAB Answers - MATLAB Central