neorv32_spi_irq.c File Reference

Addition to neorv32_spi.c, which provides an IRQ driven data flow. More...

#include "neorv32.h"
#include "neorv32_spi_irq.h"

Functions
void	neorv32_spi_init (t_neorv32_spi *self)
void	neorv32_spi_isr (t_neorv32_spi *self)
int	neorv32_spi_rw (t_neorv32_spi *self, uint8_t csn, void *spi, uint32_t len)
int	neorv32_spi_rw_busy (t_neorv32_spi *self)

Detailed Description

Addition to neorv32_spi.c, which provides an IRQ driven data flow.

Author

Andreas Kaeberlein

Note

These functions should only be used if the SPI unit was synthesized (IO_SPI_EN = true).

Function Documentation

neorv32_spi_init()

void neorv32_spi_init

(

t_neorv32_spi *

self

)

Initializes SPI flow control handle. The data structure elements are listed in t_neorv32_spi.

Parameters

[in,out]

*self

SPI driver common data handle. See t_neorv32_spi.

neorv32_spi_isr()

void neorv32_spi_isr

(

t_neorv32_spi *

self

)

SPI interrupt service routine. The data structure elements are listed in t_neorv32_spi.

Parameters

[in,out]

*self

SPI driver common data handle. See t_neorv32_spi.

neorv32_spi_rw()

int neorv32_spi_rw	(	t_neorv32_spi *	self,
		uint8_t	csn,
		void *	spi,
		uint32_t	len )

Starts ISR driven read/write SPI transfer.

Parameters

[in,out]	*self	SPI driver common data handle. See t_neorv32_spi.
[in]	csn	Used chip select index for transfer.
[in,out]	*spi	write/read data buffer for SPI. Before transmission contents the write data and after the read data.
[in]	len	number of bytes to transfer.

Returns

int status of function.

Return values

0	new transfer started.
1	transfer active, refused request.
2	unsupported data size, only 1/2/4 allowed.

neorv32_spi_rw_busy()

int neorv32_spi_rw_busy

(

t_neorv32_spi *

self

)

Check if transfer is active. see neorv32_spi_rw

Parameters

[in,out]

*self

SPI driver common data handle. See t_neorv32_spi.

Returns

int status of function.

Return values

0	idle.
1	busy.