spi_slave_example.c File Reference

AVR MEGARF SPI Slave example.

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

#include <conf_spi_slave_example.h>
#include <asf.h>

Macros
#define	DATA_BUFFER_SIZE   0x04
#define	SLAVE_RD_CMD   0x9F
#define	SPI_MISO   IOPORT_CREATE_PIN(PORTB, 3)
#define	SPI_MOSI   IOPORT_CREATE_PIN(PORTB, 2)
#define	SPI_SCK   IOPORT_CREATE_PIN(PORTB, 1)
#define	SPI_SS   IOPORT_CREATE_PIN(PORTB, 0)

Functions
int	main (void)
	Main function. More...
static void	spi_interrupt_callback (void)
	Interrupt callback for SPI interrupt. More...
static void	spi_slave_init (volatile void *spi, uint8_t mode)
	Initialize the SPI in slave mode and enable the spi interrupt. More...
static bool	spi_slave_transfer (void)
	SPI slave tranfers data to Usart SPI master. More...
static bool	spi_usart_master_transfer (void)
	Usart configured as SPI master transfers data to SPI slave. More...

Variables
uint8_t	count = 0
uint8_t	data_master_rx [DATA_BUFFER_SIZE]
uint8_t	data_master_tx [DATA_BUFFER_SIZE] = {0x11, 0x22, 0x33, 0x44}
uint8_t	data_slave_rx [DATA_BUFFER_SIZE]
uint8_t	data_slave_tx [DATA_BUFFER_SIZE] = {0x55, 0x66, 0x77, 0x88}
bool	data_transfer = false
struct usart_spi_device	USART_SPI_DEVICE_EXAMPLE

#define DATA_BUFFER_SIZE   0x04

Referenced by spi_slave_transfer(), and spi_usart_master_transfer().

#define SLAVE_RD_CMD   0x9F

Referenced by spi_interrupt_callback(), and spi_slave_transfer().

#define SPI_MISO   IOPORT_CREATE_PIN(PORTB, 3)

Referenced by spi_slave_init().

#define SPI_MOSI   IOPORT_CREATE_PIN(PORTB, 2)

Referenced by spi_slave_init().

#define SPI_SCK   IOPORT_CREATE_PIN(PORTB, 1)

Referenced by spi_slave_init().

#define SPI_SS   IOPORT_CREATE_PIN(PORTB, 0)

Referenced by spi_slave_init().

static void spi_interrupt_callback ( void  )

static

Interrupt callback for SPI interrupt.

Parameters

none

References count, data, data_slave_rx, data_slave_tx, data_transfer, SLAVE_RD_CMD, spi_get(), and spi_put().

Referenced by spi_slave_init().

static void spi_slave_init ( volatile void *  spi, uint8_t  mode  )

static

Initialize the SPI in slave mode and enable the spi interrupt.

References gpio_configure_pin, IOPORT_DIR_INPUT, IOPORT_DIR_OUTPUT, IOPORT_INIT_HIGH, PRSPI_bm, spi_enable_interrupt(), spi_enable_slave_mode(), spi_interrupt_callback(), SPI_MISO, SPI_MOSI, SPI_SCK, spi_set_clock_mode(), spi_set_interrupt_callback(), SPI_SS, and sysclk_enable_module().

Referenced by main().

static bool spi_slave_transfer ( void  )

static

SPI slave tranfers data to Usart SPI master.

References count, DATA_BUFFER_SIZE, data_master_rx, data_master_tx, data_slave_tx, SLAVE_RD_CMD, usart_spi_deselect_device(), usart_spi_read_packet(), usart_spi_select_device(), and usart_spi_write_packet().

Referenced by main().

static bool spi_usart_master_transfer ( void  )

static

Usart configured as SPI master transfers data to SPI slave.

References DATA_BUFFER_SIZE, data_master_tx, data_slave_rx, usart_spi_deselect_device(), usart_spi_select_device(), and usart_spi_write_packet().

Referenced by main().

uint8_t count = 0

Referenced by ak8975_get_data(), app_task(), bma020_get_accel(), bma150_get_accel(), bma180_get_accel(), bma220_get_accel(), bma222_get_accel(), bma250_get_accel(), hmc5883l_device_id(), hmc5883l_get_data(), hmc5883l_selftest(), imu3000_get_rotation(), imu3000_get_temperature(), ISR(), itg3200_get_rotation(), itg3200_get_temperature(), kxtf9_get_accel(), peer_req_send_task(), Receive_Message(), sfh5712_get_light(), sfh7770_get_light(), sfh7770_get_proximity(), spi_interrupt_callback(), and spi_slave_transfer().

uint8_t data_master_rx[DATA_BUFFER_SIZE]

Referenced by spi_slave_transfer().

uint8_t data_master_tx[DATA_BUFFER_SIZE] = {0x11, 0x22, 0x33, 0x44}

Referenced by spi_slave_transfer(), and spi_usart_master_transfer().

uint8_t data_slave_rx[DATA_BUFFER_SIZE]

Referenced by spi_interrupt_callback(), and spi_usart_master_transfer().

uint8_t data_slave_tx[DATA_BUFFER_SIZE] = {0x55, 0x66, 0x77, 0x88}

Referenced by spi_interrupt_callback(), and spi_slave_transfer().

bool data_transfer = false

Referenced by spi_interrupt_callback().

struct usart_spi_device USART_SPI_DEVICE_EXAMPLE

Initial value:

= {
    
    .id = USART_SPI_DEVICE_EXAMPLE_ID
}