My connection is below:I have configured STM32F407G as master and STM32F429I as slave from CUBEMX. According to reference manual "The idle state of SCK must correspond to the polarity selected in the SPI_CR1 register (by pulling up SCK if CPOL=1 or p...

I used STM32Cube IDE ST Examples to try SPI Polling communication. I followed SPI_FullDuplex_ComPolling reading file instructions. After I pressed reset buttons of 2 boards, I pressed master board user button. The result is according to readme file i...