Posted on October 19, 2012 at 10:18Hello All,
I am using STM32Fs series and I am writing a code for SPI2 . I have to read and write from the slave device. I have to read the data when RX buffer is full and write data continuoulsy to another device. I have wrtitten a small application. Which could read and write. I am new to this domain. It would be of great help, if any could check and let me know if any changes needed
void
SPIInit(
SPI_InitTypeDef
*SPI_InitStruct)
{
//Initialize the SPI_Direction member
SPI_InitStruct->SPI_Direction = SPI_Direction_2Lines_FullDuplex;
//initialize the SPI_Mode member
SPI_InitStruct->SPI_Mode = SPI_Mode_Master;
//initialize the SPI_DataSize member
SPI_InitStruct->SPI_DataSize = SPI_DataSize_8b;
//Initialize the SPI_CPOL member
SPI_InitStruct->SPI_CPOL = SPI_CPOL_High;
//Initialize the SPI_CPHA member
SPI_InitStruct->SPI_CPHA = SPI_CPHA_2Edge;
//Initialize the SPI_NSS member
SPI_InitStruct->SPI_NSS = SPI_NSS_Soft;
//Initialize the SPI_BaudRatePrescaler member
SPI_InitStruct->SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_2;
//Initialize the SPI_FirstBit member */
SPI_InitStruct->SPI_FirstBit = SPI_FirstBit_MSB;
// Initialize the SPI_CRCPolynomial member
SPI_InitStruct->SPI_CRCPolynomial = 7;
// Configure SPI2
SPI_Init(SPI2, SPI_InitStruct);
// Enable SPI2 Receive and Transmit interrupts
SPI_I2S_ITConfig(SPI2, SPI_IT_TXE,
ENABLE
);
SPI_I2S_ITConfig(SPI2, SPI_IT_RXNE,
ENABLE
);
//Enable SPI2
SPI_Cmd(SPI2,
ENABLE
);
}
uint8_t
SpiWrite(
uint16_t
Data)
{
uint8_t
SlaveData;
while
(SPI_I2S_GetFlagStatus(SPIx, SPI_I2S_FLAG_TXE) ==
RESET
);
SPI_I2S_SendData(SPIx, Data);
while
(SPI_I2S_GetFlagStatus(SPIx, SPI_I2S_FLAG_RXNE) ==
RESET
);
SlaveData=SPI_I2S_ReceiveData(SPIx);
return
SUCCESS;
}
uint8_t
SpiRead(
uint8_t
*BufferPtr)
{
uint16_t
RxBuffer=0;
while
(SPI_I2S_GetITStatus(SPIx, SPI_I2S_IT_RXNE ));
RxBuffer=SPI_I2S_ReceiveData(SPIx);
return
RxBuffer;
}
Thanks
#c-code #spi-stm32
