Problem with CRC using 16 bit SPI with DMA on STM32F103

hrobinson · ‎2014-01-07

Posted on January 07, 2014 at 17:58

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hrobinson · ‎2014-01-08

Posted on January 08, 2014 at 14:40

SOLVED!

Call SPI_I2S_ClearFlag(SPI1, SPI_FLAG_CRCERR);

immediately before or after enabling the CRC, before starting the transfer.

I would have thought that the flag would be cleared by disabling and re-enabling the CRC; but apparently not. It is in the ref manual, but it's not made very clear!