EtherCAT Device Interface

Master interface for EtherCAT-capable network device drivers. More...

Functions
void	ecdev_withdraw (ec_device_t *device)
	Withdraws an EtherCAT device from the master. More...
int	ecdev_open (ec_device_t *device)
	Opens the network device and makes the master enter IDLE phase. More...
void	ecdev_close (ec_device_t *device)
	Makes the master leave IDLE phase and closes the network device. More...
void	ecdev_receive (ec_device_t *device, const void *data, size_t size)
	Accepts a received frame. More...
void	ecdev_set_link (ec_device_t *device, uint8_t state)
	Sets a new link state. More...
uint8_t	ecdev_get_link (const ec_device_t *device)
	Reads the link state. More...
ec_device_t *	ecdev_offer (struct net_device *net_dev, ec_pollfunc_t poll, struct module *module)
	Offers an EtherCAT device to a certain master. More...

Detailed Description

Master interface for EtherCAT-capable network device drivers.

Through the EtherCAT device interface, EtherCAT-capable network device drivers are able to connect their device(s) to the master, pass received frames and notify the master about status changes. The master on his part, can send his frames through connected devices.

Function Documentation

ecdev_withdraw()

void ecdev_withdraw

(

ec_device_t *

device

)

Withdraws an EtherCAT device from the master.

The device is disconnected from the master and all device ressources are freed.

Attention

Before calling this function, the ecdev_stop() function has to be called, to be sure that the master does not use the device any more.

Parameters

device

EtherCAT device

Definition at line 548 of file device.c.

ecdev_open()

int ecdev_open

(

ec_device_t *

device

)

Opens the network device and makes the master enter IDLE phase.

Returns

0 on success, else < 0

Parameters

device

EtherCAT device

Definition at line 579 of file device.c.

ecdev_close()

void ecdev_close

(

ec_device_t *

device

)

Makes the master leave IDLE phase and closes the network device.

Returns

0 on success, else < 0

Parameters

device

EtherCAT device

Definition at line 617 of file device.c.

ecdev_receive()

void ecdev_receive	(	ec_device_t *	device,
		const void *	data,
		size_t	size
	)

Accepts a received frame.

Forwards the received data to the master. The master will analyze the frame and dispatch the received commands to the sending instances.

The data have to begin with the Ethernet header (target MAC address).

Parameters

device	EtherCAT device
data	pointer to received data
size	number of bytes received

Definition at line 641 of file device.c.

ecdev_set_link()

void ecdev_set_link	(	ec_device_t *	device,
		uint8_t	state
	)

Sets a new link state.

If the device notifies the master about the link being down, the master will not try to send frames using this device.

Parameters

device	EtherCAT device
state	new link state

Definition at line 685 of file device.c.

ecdev_get_link()

uint8_t ecdev_get_link

(

const ec_device_t *

device

)

Reads the link state.

Returns

Link state.

Parameters

device

EtherCAT device

Definition at line 711 of file device.c.

ecdev_offer()

ec_device_t* ecdev_offer	(	struct net_device *	net_dev,
		ec_pollfunc_t	poll,
		struct module *	module
	)

Offers an EtherCAT device to a certain master.

The master decides, if it wants to use the device for EtherCAT operation, or not. It is important, that the offered net_device is not used by the kernel IP stack. If the master, accepted the offer, the address of the newly created EtherCAT device is returned, else NULL is returned.

Returns

Pointer to device, if accepted, or NULL if declined.

Parameters

net_dev	net_device to offer
poll	device poll function
module	pointer to the module

Definition at line 484 of file module.c.