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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 (registration required) various documents highlighting:

System Workbench for STM32


assembly interrupt is ineffective; Default_Handler acts instead

France

The problem is probably that the linker eliminates your code, thinking it’s not used; try suppressing the weak definition for TIM6_DAC_IRQHandler in startup_stm32l053xx.s to see if it solves the problem.

Bernard (Ac6)