I want the maximum processing speed from the STM32H723. So I enabled ITMC and DTCM cache. The project prcesses samples from 4 ADC inputs with ADC1. ADC1 is timer triggered and set up to use DMA in circular mode to transfer data to a buffer in D2 domain.
I to access these values from my code in ITCM, so I configured MDMA to copy the buffer to DTCM. Now because DCache is active I need to work with the MPU (memory protection unit) I studied the example from STM MDMA_LinkedList and copied the MPU configuration.
The MDMA is configured in BUFFER_TRANSFER mode and BURST_SINGLE without any linked item. MDMA complete and error callbacks are configured.
Now I can see that the MDMA initialized with HAL_MDMA_Start_IT, completes. I even see the values in the D1 buffer but .....it executes only once and both the DMA and MDMA freeze. I am at a loss as to what else I need to do to get it working. Help is very much appreciated.
