device.h File Reference

EtherCAT device structure. More...

Go to the source code of this file.

Data Structures
struct	ec_device
	EtherCAT device. More...

Macros
#define	EC_TX_RING_SIZE   2
	Size of the transmit ring. More...

Functions
int	ec_device_init (ec_device_t *, ec_master_t *)
	Constructor. More...
void	ec_device_clear (ec_device_t *)
	Destructor.
void	ec_device_attach (ec_device_t *, struct net_device *, ec_pollfunc_t, struct module *)
	Associate with net_device.
void	ec_device_detach (ec_device_t *)
	Disconnect from net_device.
int	ec_device_open (ec_device_t *)
	Opens the EtherCAT device. More...
int	ec_device_close (ec_device_t *)
	Stops the EtherCAT device. More...
void	ec_device_poll (ec_device_t *)
	Calls the poll function of the assigned net_device. More...
uint8_t *	ec_device_tx_data (ec_device_t *)
	Returns a pointer to the device's transmit memory. More...
void	ec_device_send (ec_device_t *, size_t)
	Sends the content of the transmit socket buffer. More...
void	ec_device_clear_stats (ec_device_t *)
	Clears the frame statistics.
void	ec_device_update_stats (ec_device_t *)
	Update device statistics.

Detailed Description

EtherCAT device structure.

Definition in file device.h.

Macro Definition Documentation

EC_TX_RING_SIZE

#define EC_TX_RING_SIZE   2

Size of the transmit ring.

This memory ring is used to transmit frames. It is necessary to use different memory regions, because otherwise the network device DMA could send the same data twice, if it is called twice.

Definition at line 51 of file device.h.

Function Documentation

ec_device_init()

int ec_device_init	(	ec_device_t *	device,
		ec_master_t *	master
	)

Constructor.

Returns

0 in case of success, else < 0

Parameters

device	EtherCAT device
master	master owning the device

Definition at line 68 of file device.c.

ec_device_open()

int ec_device_open

(

ec_device_t *

device

)

Opens the EtherCAT device.

Returns

0 in case of success, else < 0

Parameters

device

EtherCAT device

Definition at line 247 of file device.c.

ec_device_close()

int ec_device_close

(

ec_device_t *

device

)

Stops the EtherCAT device.

Returns

0 in case of success, else < 0

Parameters

device

EtherCAT device

Definition at line 284 of file device.c.

ec_device_poll()

void ec_device_poll

(

ec_device_t *

device

)

Calls the poll function of the assigned net_device.

The master itself works without using interrupts. Therefore the processing of received data and status changes of the network device has to be done by the master calling the ISR "manually".

Parameters

device

EtherCAT device

Definition at line 483 of file device.c.

ec_device_tx_data()

uint8_t* ec_device_tx_data

(

ec_device_t *

device

)

Returns a pointer to the device's transmit memory.

Returns

pointer to the TX socket buffer

Parameters

device

EtherCAT device

Definition at line 317 of file device.c.

ec_device_send()

void ec_device_send	(	ec_device_t *	device,
		size_t	size
	)

Sends the content of the transmit socket buffer.

Cuts the socket buffer content to the (now known) size, and calls the start_xmit() function of the assigned net_device.

Parameters

device	EtherCAT device
size	number of bytes to send

Definition at line 336 of file device.c.