Availability of the core while using SPI_DMA

[gupta_shivam22]

Hi team,

I have a query regarding the STM32F756ZG MCU that I am currently using for my project. I wanted to know that if I use the SPI_DMA port for continuous data stream that has a sampling rate of 1kSPS, then, is it possible to use the MCU core to process the data and apply my algorithms on the data stored in DMA simultaneously in the real-time without disturbing the data stream and losing any packet. In other words, can I use the SPI DMA and DSP core simultaneously?

Thanks

[LCE]

Yes, that's what DMA is for: to "un-load" the CPU.

Just build a small state machine, using for example flags which are set in the DMA (half-) complete interrupts, so DMA transferred from SPI peripheral to RAM. Then process the data.

Double Buffer Mode (DBM) is a nice extra feature for that.

Just make sure that the processing time gets not too high, but at 1kSPS this will probably not the case.