Hello. I use a bunch of stm32f446 and w25q128. Connected QSPI. Data is only read is single line mode. If you use four lines mode, it does not work correctly. As an example I used from Open-7xx Quad SPI w25q128. Tell me, it's problem w25q128 or QSPI peripheral module. The attached photo shows the result of the reading function on four lines(Q0 - Q3). In pdf it is indicated that empty cycles are needed(DummyCycles). But if I add them, then nonsense is read.