How to share data between cores on the STM32h745 using the Hardware Semaphore

• STM32CubeH7

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  STM32Cube MCU Full Package for the STM32H7 series - (HAL + LL Drivers, CMSIS Core, CMSIS Device, MW libraries plus a set of Projects running on all boards provided by ST (Nucleo, Evaluation and Discovery Kits))

  

I have a STM32H745 board with an IMU connected. I'm accquiring the data over the M4 core and then trying to send it to the M7 core using the HSEM (hardware semaphore). I'm basing my work off the examples on the ST project here.

• stm32h7-dual-core-inter-cpu-async-communication

  1 74 3.6 C

  Inter-CPU asynchronous communication between Cortex-M7 and Cortex-M4 cores on STM32H7 dual core devices

Unfortunately, the data on the M7 side seems to repeat ever so often and I'm not sure why. A sample output is shown here. I'm not sure if I'm making a very obvious mistake here. I've looked around and tried all sorts of tricks. The only one that seems to have worked is Tijen Majerle's ring buffer implementation but this doesn't seem to make use of the HSEM. I'm looking for a HSEM solution partly out of curiosity and partly for performance reasons down the line.

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