spi_master.c File Reference

SPI master driver functions.

Copyright (c) 2014-2018 Microchip Technology Inc. and its subsidiaries.

#include "spi_master.h"
#include "sysclk.h"

Functions
void	spi_deselect_device (volatile void *spi, struct spi_device *device)
	Deselect given device on the SPI bus. More...
void	spi_master_init (volatile void *spi)
	Initializes the SPI in master mode. More...
void	spi_master_setup_device (volatile void *spi, struct spi_device *device, spi_flags_t flags, uint32_t baud_rate, board_spi_select_id_t sel_id)
	Setup a SPI device. More...
status_code_t	spi_read_packet (volatile void *spi, uint8_t *data, size_t len)
	Receive a sequence of bytes from a SPI device. More...
void	spi_select_device (volatile void *spi, struct spi_device *device)
	Select given device on the SPI bus. More...
status_code_t	spi_write_packet (volatile void *spi, const uint8_t *data, size_t len)
	Send a sequence of bytes to a SPI device. More...

void spi_master_setup_device	(	volatile void *	spi,
		struct spi_device *	device,
		spi_flags_t	flags,
		uint32_t	baud_rate,
		board_spi_select_id_t	sel_id
	)

Setup a SPI device.

The returned device descriptor structure must be passed to the driver whenever that device should be used as current slave device.

Parameters

spi	Base address of the SPI instance.
device	Pointer to SPI device struct that should be initialized.
flags	SPI configuration flags. Common flags for all implementations are the SPI modes SPI_MODE_0 ... SPI_MODE_3.
baud_rate	Divider for Baud rate setting.
sel_id	Board specific select id

References Assert, SPI_MODE_gm, SPI_MODE_gp, spi_set_baud_div(), and sysclk_get_cpu_hz().

Referenced by epd_spi_init(), and main().