stm32 - STM32F205 SPI RXNE flag is not set -

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I am using STM32F205 SPI1 in master mode and during the transaction the RXNE flag is never set here. SPI initialization Is a part of: 

  SPI1-> CR1 = SPI_CR1_MSTR | SPI_CR1_SSI | SPI_CR1_SSM | SPI_CR1_SPE; SPI1- & gt; CR2 = 0;

Then I am trying to get a single byte transmission: 

  while (! (SPI1-> SR & amp; SPI_FLAG_TXE)) {} previous tx SPI1-> gt; DR = 0 xab; // While transmitting some bytes (! (SPI1-> SR & SPI_flag_RXNE)) wait for // byte UIT 8_T result = SPI1-> Dr; This code is waiting for the RXN flag. I tried to wait for the busy flag  BSY = 0  instead of  RXNE = 1  and the SPI began to work It seems that RXNE is never set up .

Suggestion only: 

  SPI1 - & gt; CR1 = SPI_CR1_MSTR | SPI_CR1_SSI | SPI_CR1_SSM | SPI_CR1_SPE; SPI1- & gt; CR2 = 0;

You are naming the SPI before writing in the CR2 register. Enable SPI only after typing upside down or CR2.


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