xdmac_example.c File Reference

SAM Direct Memory Access Controller driver example.

Copyright (c) 2015-2018 Microchip Technology Inc. and its subsidiaries.

#include <asf.h>
#include <conf_board.h>
#include <conf_clock.h>

Macros
#define	BLOCK_LEN   16
	Block length for single transfer. More...
#define	BUFFER_SIZE   512
	The buffer size for transfer. More...
#define	MICROBLOCK_LEN   16
	Micro-block length for single transfer. More...
#define	XDMA_CH   0
	XDMA channel used in this example. More...

Functions
static void	configure_console (void)
	Configure the console UART. More...
int	main (void)
	Application entry point. More...
void	XDMAC_Handler (void)
	XDMAC interrupt handler. More...

Variables
static uint8_t	dst_buf [BUFFER_SIZE]
volatile uint32_t	g_xfer_done = 0
static COMPILER_WORD_ALIGNED lld_view0	lld [2]
	Linked list descriptor. More...
static uint8_t	src_buf [BUFFER_SIZE]
static xdmac_channel_config_t	xdmac_channel_cfg
	XDMA channel configuration. More...

#define BLOCK_LEN   16

Block length for single transfer.

Referenced by main().

#define BUFFER_SIZE   512

The buffer size for transfer.

Referenced by main().

#define MICROBLOCK_LEN   16

Micro-block length for single transfer.

Referenced by main().

#define XDMA_CH   0

XDMA channel used in this example.

Referenced by main(), and XDMAC_Handler().

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, CONSOLE_UART_ID, stdio_serial_init(), and sysclk_enable_peripheral_clock().

Referenced by main().

int main

(

void

)

Application entry point.

Returns

Unused (ANSI-C compatibility).

References BLOCK_LEN, board_init(), BOARD_NAME, BUFFER_SIZE, configure_console(), dst_buf, g_xfer_done, lld, xdmac_channel_config_t::mbr_bc, xdmac_channel_config_t::mbr_cfg, xdmac_channel_config_t::mbr_da, lld_view0::mbr_da, xdmac_channel_config_t::mbr_ds, xdmac_channel_config_t::mbr_dus, lld_view0::mbr_nda, xdmac_channel_config_t::mbr_sa, xdmac_channel_config_t::mbr_sus, xdmac_channel_config_t::mbr_ubc, lld_view0::mbr_ubc, MICROBLOCK_LEN, pmc_enable_periph_clk(), src_buf, sysclk_init(), XDMA_CH, xdmac_channel_enable(), xdmac_channel_enable_interrupt(), xdmac_channel_set_descriptor_addr(), xdmac_channel_set_descriptor_control(), xdmac_configure_transfer(), xdmac_enable_interrupt(), XDMAC_UBC_NDE_FETCH_EN, XDMAC_UBC_NDEN_UPDATED, XDMAC_UBC_NSEN_UPDATED, XDMAC_UBC_NVIEW_NDV0, and XDMAC_UBC_UBLEN.

void XDMAC_Handler

(

void

)

XDMAC interrupt handler.

References g_xfer_done, XDMA_CH, and xdmac_channel_get_interrupt_status().

uint8_t dst_buf[BUFFER_SIZE]

static

Referenced by main().

volatile uint32_t g_xfer_done = 0

Referenced by main(), and XDMAC_Handler().

COMPILER_WORD_ALIGNED lld_view0 lld[2]

static

Linked list descriptor.

Referenced by main().

uint8_t src_buf[BUFFER_SIZE]

static

Referenced by main().

xdmac_channel_config_t xdmac_channel_cfg

static

XDMA channel configuration.