SPI Peripheral Driver. More...

#include <stdint.h>

Data Structures
struct	spi_t
	SPI Peripheral Descriptor. More...

Macros
#define	SPI_TRANSFER_COMPLETE 0
	SPI transfer complete without errors.
#define	SPI_TRANSFER_ERROR 1
	SPI transfer had errors.
#define	SPI_DIV_2 0
	SPI Baudrate = SPI clock / 2.
#define	SPI_DIV_4 1
	SPI Baudrate = SPI clock / 4.
#define	SPI_DIV_8 2
	SPI Baudrate = SPI clock / 8.
#define	SPI_DIV_16 3
	SPI Baudrate = SPI clock / 16.
#define	SPI_DIV_32 4
	SPI Baudrate = SPI clock / 32.
#define	SPI_DIV_64 5
	SPI Baudrate = SPI clock / 64.
#define	SPI_DIV_128 6
	SPI Baudrate = SPI clock / 128.
#define	SPI_DIV_256 7
	SPI Baudrate = SPI clock / 256.

Typedefs
typedef void(*	spi_callback_t) (uint32_t event)
	SPI callback on transfer complete or on transfer error.

Functions
void	spi_init (uint8_t spi_id, uint32_t div, spi_callback_t callback)
	Initializes the given SPI.
void	spi_transfer (uint8_t spi_id, uint8_t src, uint8_t dst, uint16_t len)
	Transfers the block of data requested.

Detailed Description

SPI Peripheral Driver.

Provides functions to initialize the SPI peripheral and to initiate a transfer.

Typedef Documentation

typedef void(* spi_callback_t) (uint32_t event)

SPI callback on transfer complete or on transfer error.

Parameters

event

type of event. It can be:

Initializes the given SPI.

Parameters

spi_id	- SPI identifier
div	- Divider for the baudrate value. It can be one of: SPI_DIV_2, SPI_DIV_4, SPI_DIV_8, SPI_DIV_16, SPI_DIV_32, SPI_DIV_64, SPI_DIV_128, SPI_DIV_256.
callback	- function to be called at the end of the tranfer or in case of errors.

Transfers the block of data requested.

Parameters

spi_id	- SPI identifier.
src	- source buffer. It can be NULL if it is a send-only transfer.
dst	- destination buffer. It can be NULL if it is a send-only transfer.
len	- buffers length.