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Continue to Chatstm32f4-spi-dma https://micromouseonline.com/2012/03/11/adding-dma-to-the-spi-driver-with-the-stm32f4/stm32f4-spi-dma/
stm32f4-spi-dma https://micromouseonline.com/2012/03/11/adding-dma-to-the-spi-driver-with-the-stm32f4/stm32f4-spi-dma/