STM32G474RE CRC feed from buffer via DMA memory transfer.

[Spam4tea]

I want to use the standalone CRC module to offload calculations AND transfers from CPU - using purely DMA memory transfers - is this possible on the STM32G474RE?

[Saket_Om]

Hello @Spam4tea 

Yes, it is possible to use DMA to offload CRC calculations on the STM32G474RE

Please refer to the AN4187 for more details. 

The recommended steps are as follows:

1. Configure CRC module.
2. Configure DMA.
3. Start DMA transfer.
4. Wait for DMA transfer complete interrupt/flag.
5. In the complete callback function read CRC result from CRC->DR.