STM32F4 AD9833 SPI

Probably want to be checking TXE/RXNE instead of blindly writing

/**
* @brief Write a byte on the SD.
* @param Data: byte to send.
* @retval None
*/
uint8_t SD_WriteByte(uint8_t Data)
{
/*!< Wait until the transmit buffer is empty */
while(SPI_I2S_GetFlagStatus(SD_SPI, SPI_I2S_FLAG_TXE) == RESET)
{
}
/*!< Send the byte */
SPI_I2S_SendData(SD_SPI, Data);
/*!< Wait to receive a byte*/
while(SPI_I2S_GetFlagStatus(SD_SPI, SPI_I2S_FLAG_RXNE) == RESET)
{
}
/*!< Return the byte read from the SPI bus */
return SPI_I2S_ReceiveData(SD_SPI);
}

Thanks for the help clive1. I have some questions though, if I'm not going to receive anything would i still have to use

while(SPI_I2S_GetFlagStatus(SD_SPI, SPI_I2S_FLAG_RXNE) == RESET)
{
}
/*!< Return the byte read from the SPI bus */
return SPI_I2S_ReceiveData(SD_SPI);

It's important to understand the symmetrical nature of the SPI interface, TXE signals as soon as, and probably before, the first bit hits the wire,  whereas RXNE signals after the last bit has left. This is important with respect to manually driving as CS pin.

Hello, I've been working on the project for a while now. I'm now able to generate the desired waveform but I can not set the frequency or the phase of the signal. Can you tell what am i doing wrong and how can it be fixed? Thank you very much!

Hi,