Serial Peripheral Interface (SPI) PDC example for SAM.

#include "asf.h"
#include "conf_board.h"
#include "conf_spi_pdc_example.h"
#include "delay.h"

Macros
#define	COMM_BUFFER_SIZE 64

#define	NUM_SPCK_CONFIGURATIONS 4

#define	SPI_CHIP_SEL 0

#define	SPI_CLK_PHASE 0

#define	SPI_CLK_POLARITY 0

#define	SPI_DLYBCT 0x10

#define	SPI_DLYBS 0x40

#define	STRING_EOL "\r"

#define	STRING_HEADER

#define	UART_BAUDRATE 115200

Functions
static void	configure_console (void)
	Configure the Console UART. More...

static void	display_menu (void)
	Display the user menu on the terminal. More...

int	main (void)
	Application entry point for SPI PDC example. More...

void	SPI_Handler (void)
	Interrupt handler for the SPI slave. More...

static void	spi_master_go (void)
	Start SPI transfer test. More...

static void	spi_master_initialize (void)
	Initialize SPI as master. More...

static void	spi_master_transfer (void p_tbuf, uint32_t tsize, void p_rbuf, uint32_t rsize)
	Perform SPI master transfer. More...

static void	spi_set_clock_configuration (uint8_t configuration)
	Set the specified SPI clock configuration. More...

static void	spi_slave_initialize (void)
	Initialize SPI as slave. More...

static void	spi_slave_transfer (void p_tbuf, uint32_t tsize, void p_rbuf, uint32_t rsize)
	Set SPI slave transfer. More...

Variables
Pdc *	g_p_spim_pdc

Pdc *	g_p_spis_pdc

static uint8_t	gs_uc_spi_m_rbuffer [COMM_BUFFER_SIZE]

static uint8_t	gs_uc_spi_m_tbuffer [COMM_BUFFER_SIZE]

static uint8_t	gs_uc_spi_s_rbuffer [COMM_BUFFER_SIZE]

static uint8_t	gs_uc_spi_s_tbuffer [COMM_BUFFER_SIZE]

static const uint32_t	gs_ul_clock_configurations []

static uint32_t	gs_ul_spi_clock = 500000

#define COMM_BUFFER_SIZE 64

Referenced by SPI_Handler(), spi_master_go(), spi_master_initialize(), and spi_slave_initialize().

#define NUM_SPCK_CONFIGURATIONS 4

Referenced by display_menu(), and main().

#define SPI_CHIP_SEL 0

Referenced by spi_master_initialize(), spi_set_clock_configuration(), and spi_slave_initialize().

#define SPI_CLK_PHASE 0

Referenced by spi_master_initialize(), and spi_slave_initialize().

#define SPI_CLK_POLARITY 0

Referenced by spi_master_initialize(), and spi_slave_initialize().

#define SPI_DLYBCT 0x10

Referenced by spi_master_initialize().

#define SPI_DLYBS 0x40

Referenced by spi_master_initialize().

#define STRING_EOL "\r"

#define STRING_HEADER

Value:

"-- Spi Pdc Example  --\r\n" \
        "-- "BOARD_NAME" --\r\n" \
        "-- Compiled: "__DATE__" "__TIME__" --"STRING_EOL

Referenced by main().

#define UART_BAUDRATE 115200

static void configure_console ( void )

static

Configure the Console UART.

References uart_rs232_options::baudrate, CONF_UART, CONF_UART_BAUDRATE, CONF_UART_CHAR_LENGTH, CONF_UART_PARITY, CONF_UART_STOP_BITS, stdio_serial_init(), and sysclk_enable_peripheral_clock().

Referenced by main().

static void display_menu ( void )

static

Display the user menu on the terminal.

References NUM_SPCK_CONFIGURATIONS.

Referenced by main().

int main ( void )

Application entry point for SPI PDC example.

Returns: Unused (ANSI-C compatibility).

References board_init(), configure_console(), display_menu(), NUM_SPCK_CONFIGURATIONS, spi_master_go(), spi_set_clock_configuration(), spi_slave_initialize(), STRING_HEADER, and sysclk_init().

void SPI_Handler ( void )

Interrupt handler for the SPI slave.

References COMM_BUFFER_SIZE, spi_read_status(), spi_slave_transfer(), and status.

static void spi_master_go ( void )

static

Start SPI transfer test.

References COMM_BUFFER_SIZE, spi_master_initialize(), and spi_master_transfer().

Referenced by main().

static void spi_master_initialize ( void )

static

static void spi_master_transfer	(	void *	p_tbuf,
		uint32_t	tsize,
		void *	p_rbuf,
		uint32_t	rsize
	)

static

Perform SPI master transfer.

Parameters

pbuf	Pointer to buffer to transfer.
size	Size of the buffer.

References NULL, pdc_disable_transfer(), pdc_enable_transfer(), pdc_rx_init(), pdc_tx_init(), spi_read_status(), pdc_packet::ul_addr, and pdc_packet::ul_size.

Referenced by spi_master_go().

static void spi_set_clock_configuration ( uint8_t configuration )

static

Set the specified SPI clock configuration.

Parameters

configuration Index of the configuration to set.

References SPI_CHIP_SEL, spi_set_baudrate_div(), and sysclk_get_peripheral_hz().

Referenced by main().

static void spi_slave_initialize ( void )

static

Initialize SPI as slave.

References COMM_BUFFER_SIZE, pdc_disable_transfer(), pmc_enable_periph_clk(), SPI_CHIP_SEL, SPI_CLK_PHASE, SPI_CLK_POLARITY, spi_disable(), spi_disable_mode_fault_detect(), spi_enable(), spi_reset(), spi_set_bits_per_transfer(), spi_set_clock_phase(), spi_set_clock_polarity(), spi_set_peripheral_chip_select_value(), spi_set_slave_mode(), and spi_slave_transfer().

Referenced by main().

static void spi_slave_transfer	(	void *	p_tbuf,
		uint32_t	tsize,
		void *	p_rbuf,
		uint32_t	rsize
	)

static

Set SPI slave transfer.

Parameters

p_buf	Pointer to buffer to transfer.
size	Size of the buffer.

References NULL, pdc_enable_transfer(), pdc_rx_init(), pdc_tx_init(), spi_enable_interrupt(), pdc_packet::ul_addr, and pdc_packet::ul_size.

Referenced by SPI_Handler(), and spi_slave_initialize().

Pdc* g_p_spim_pdc

Referenced by nm_bus_init().

Pdc * g_p_spis_pdc

uint8_t gs_uc_spi_m_rbuffer[COMM_BUFFER_SIZE]

static

uint8_t gs_uc_spi_m_tbuffer[COMM_BUFFER_SIZE]

static

uint8_t gs_uc_spi_s_rbuffer[COMM_BUFFER_SIZE]

static

uint8_t gs_uc_spi_s_tbuffer[COMM_BUFFER_SIZE]

static

const uint32_t gs_ul_clock_configurations[]

static

Initial value:

=

{ 500000, 1000000, 2000000, 5000000 }

uint32_t gs_ul_spi_clock = 500000

static

Microchip® Advanced Software Framework

Macros

Functions

Variables