File content as of revision 9:367773f8eba4:

#include "spi_dma.h"

DMA_HandleTypeDef hdma_spi1_tx;
DMA_HandleTypeDef hdma_spi1_rx;
SPI_HandleTypeDef Spi1Handle;

DMA_HandleTypeDef hdma_spi3_tx;
DMA_HandleTypeDef hdma_spi3_rx;
SPI_HandleTypeDef Spi3Handle;
#if 0
	SPI_HandleTypeDef Spi2Handle;
#endif


static void spi_dma_error_handler(void)
{
  while(1)
  { 
	/* infinite loop */
  }
}

static void spi_dma_start( SPI_TypeDef *spi, uint8_t *txbuff, uint8_t *rxbuff, uint16_t count)
{
	SPI_HandleTypeDef *hspi;
	if( spi == SPI1 ) {
		hspi = &Spi1Handle;
	}
#if defined(SPI3_BASE)
	else if( spi == SPI3 ) {
		hspi = &Spi3Handle;
	}
#endif
#if 0
	else{ 
		hspi = &Spi2Handle;
	}
#endif
	if( HAL_SPI_TransmitReceive_DMA( hspi, (uint8_t *)txbuff, (uint8_t *)rxbuff, count) != HAL_OK) {
		spi_dma_error_handler();
	}
}

static void spi_dma_wait_end( SPI_TypeDef *spi )
{
	SPI_HandleTypeDef *hspi;
	if( spi == SPI1 ) {
		hspi = &Spi1Handle;
	} 
#if defined(SPI3_BASE)
	else if( spi == SPI3 ) {
		hspi = &Spi3Handle;
	}
#endif
#if 0
	else{ 
		hspi = &Spi2Handle;
	}
#endif
	while (HAL_SPI_GetState( hspi ) != HAL_SPI_STATE_READY) {
		/* just wait */ 
	} 
}

/* SPI1 init function */
static uint8_t spi_dma_inited = 0;
static void spi_dma_init( SPI_TypeDef *spi)
{
	spi_dma_irq_setup( spi );
}

static void spi_dma_deinit( SPI_TypeDef *spi)
{
	DMA_HandleTypeDef *phdma_rx,*phdma_tx;

	if( spi == SPI1 ) {
		phdma_tx = &hdma_spi1_tx;
		phdma_rx = &hdma_spi1_rx;
	} 
#if defined(SPI3_BASE)
	else if( spi == SPI3 ) {
		phdma_tx = &hdma_spi3_tx;
		phdma_rx = &hdma_spi3_rx;
	} 
#endif
#if 0
	else{ 
	}
#endif
	/* At first, execute DeInit for reset DMA */
	HAL_DMA_DeInit( phdma_tx );
	HAL_DMA_DeInit( phdma_rx );
}

void __spi_dma_read_write( SPI_TypeDef *spi, uint8_t *txbuff, uint8_t *rxbuff, uint16_t count, uint8_t mode)
{
	if( spi_dma_inited == 0 ) {
		spi_dma_inited = 1;
		spi_dma_init( spi );
	}
	spi_dma_get_info( spi );
	spi_dma_handle_setup( spi, mode );	
	spi_dma_start( spi, txbuff, rxbuff, count );
	spi_dma_wait_end( spi );
	//spi_dma_deinit(spi);
}