SPI emulation module. More...

#include <stdbool.h>
#include <stdint.h>
#include "gpio.h"

Include dependency graph for spi.h:

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Data Structures
struct	spi_config
	Configuration structure for the SPI emulation module. More...

Functions
void	init_spi_module (const struct spi_config *config)
	Configures the SPI module. More...

uint16_t	spi_transceive (uint16_t output)
	Sends and receives a word (full duplex) More...

void	spi_select (bool select)
	Controls the chip select line. More...

Detailed Description

SPI emulation module.

Note: At the moment only a single instance is supported! Also, the clock frequency is hard-coded to 500kHz.

Function Documentation

void init_spi_module ( const struct spi_config * config )

Configures the SPI module.

Initializes all specified GPIO ports and the clock line

Parameters

config the SPI configuration

void spi_select ( bool select )

Controls the chip select line.

Parameters

select if true, the line is pulled down

uint16_t spi_transceive ( uint16_t output )

Sends and receives a word (full duplex)

Parameters

output the output word