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SW4STM32 and SW4Linux fully supports the STM32MP1 asymmetric multicore Cortex/A7+M4 MPUs

   With System Workbench for Linux, Embedded Linux on the STM32MP1 family of MPUs from ST was never as simple to build and maintain, even for newcomers in the Linux world.
And, if you install System Workbench for Linux in System Workbench for STM32 you can seamlessly develop and debug asymmetric applications running partly on Linux, partly on the Cortex-M4.
You can get more information from the ac6-tools website and download two short videos (registration required) highlighting:

System Workbench for STM32


Receiving Characters From UART Corrupts Memory

> // pUART2Rx2 is global:
> uint8_t pUART2Rx2; /**< UART2 Rx DMA buffer for receiving commands */
>
> // Exectuted in an initialization function:
> HAL_UART_Receive_DMA( &huart2, pUART2Rx, 2 );

It looks like you’ve declared pUART2Rx2 as a single byte, then configured the DMA to transfer two bytes.
But you also declare pUART2Rx2 then reference pUART2Rx, so I don’t see how this code compiles at all.