Resolved! STM32U5xx: OCTOSPI (as QSPI) with regular QSPI transaction - for you
STM says: OCTOSPI can generate a "regular SPI" transaction. But is not true:A "regular SPI transaction" means actually on OCTOSPI: a half-duplex SPI transaction (using just IO0, but for both directions).I you want to generate a "regular" SPI transact...