Functions
int	edt_close (EdtDev edt_p)
	Shut down all pending I/O operations, closes the device or channel and frees all resources associated with the device handle. More...

EDT_CHECK_RETURN EdtDev	edt_open (const char *device_name, int unit)
	Open the specified EDT board and sets up the device handle. Equivalent to `edt_open_device(device_name, unit, channel: 0, verbose: 1)`. More...

EDT_CHECK_RETURN EdtDev	edt_open_quiet (const char *device_name, int unit)
	Same as edt_open(), but with fewer log messages. Equivalent to `edt_open_device(device_name, unit, channel: 0, verbose: 0)`. More...

EDT_CHECK_RETURN EdtDev	edt_open_channel (const char *device_name, int unit, int channel)
	Open a specific DMA channel on the specified EDT board. Equivalent to `edt_open_device(device_name, unit, channel, verbose: 1)`. More...

EDT_CHECK_RETURN EdtDev	edt_open_device (const char *device_name, int unit, int channel, int verbose)
	Open a specific EDT board and DMA channel. More...

void	edt_set_port (EdtDev edt_p, EdtIOPort port)
	Set the `port` number, as distinct from the DMA channel. More...

EdtIOPort	edt_get_port (EdtDev edt_p)
	Get the port number set by edt_set_port(). More...

Detailed Description

These functions are used to open and close the EDT device.

Function Documentation

◆ edt_close()

int edt_close ( EdtDev edt_p )

Shut down all pending I/O operations, closes the device or channel and frees all resources associated with the device handle.

Parameters

edt_p The open EDT device handle.

Returns: 0 on success, -1 on failure. If an error occurs, call edt_perror() to get the system error message.

See also: edt_open_device()

◆ edt_open()

EDT_CHECK_RETURN EdtDev edt_open	(	const char *	device_name,
		int	unit
	)

Open the specified EDT board and sets up the device handle. Equivalent to edt_open_device(device_name, unit, channel: 0, verbose: 1).

Parameters

device_name	Pass EDT_INTERFACE. Open a dummy device for testing by passing "dmy".
unit	Unit number of the device. Unit numbers start at 0.

Returns: The opened EDT device handle if successful, or NULL if unsuccessful. Use edt_perror() to print an error message.

Once opened, the device handle may be used to perform I/O using edt_read(), edt_write(), edt_configure_ring_buffers(), and other input-output library calls. When finished, use edt_close() to release allocated resources.

See also: edt_open_channel(), edt_open_quiet(), edt_close()

◆ edt_open_quiet()

EDT_CHECK_RETURN EdtDev edt_open_quiet	(	const char *	device_name,
		int	unit
	)

Same as edt_open(), but with fewer log messages. Equivalent to edt_open_device(device_name, unit, channel: 0, verbose: 0).

Parameters

device_name	Pass EDT_INTERFACE. Open a dummy device for testing by passing "dmy".
unit	Unit number of the device. Unit numbers start at 0.

Returns: The opened EDT device handle if successful, or NULL if unsuccessful. Use edt_perror() to print an error message.

Once opened, the device handle may be used to perform I/O using edt_read(), edt_write(), edt_configure_ring_buffers(), and other input-output library calls. When finished, use edt_close() to release allocated resources.

See also: edt_open_channel(), edt_open_quiet(), edt_close()

◆ edt_open_channel()

EDT_CHECK_RETURN EdtDev edt_open_channel	(	const char *	device_name,
		int	unit,
		int	channel
	)

Open a specific DMA channel on the specified EDT board. Equivalent to edt_open_device(device_name, unit, channel, verbose: 1).

Parameters

device_name	Pass EDT_INTERFACE. Open a dummy device for testing by passing "dmy".
unit	Unit number of the device. Unit numbers start at 0.
channel	DMA channel number, starting from 0.

Returns: The opened EDT device handle if successful, or NULL if unsuccessful. Use edt_perror() to print an error message.

Once opened, the device handle may be used to perform I/O using edt_read(), edt_write(), edt_configure_ring_buffers(), and other input-output library calls. When finished, use edt_close() to release allocated resources.

See also: edt_open_channel(), edt_open_quiet(), edt_close()

◆ edt_open_device()

EDT_CHECK_RETURN EdtDev edt_open_device	(	const char *	device_name,
		int	unit,
		int	channel,
		int	verbose
	)

Open a specific EDT board and DMA channel.

Parameters

device_name	Pass EDT_INTERFACE. Open a dummy device for testing by passing "dmy".
unit	Unit number of the device. Unit numbers start at 0.
channel	DMA channel number, starting from 0.
verbose	Enable (true / non-zero) messages on successful open, or error messages on failure. Pass false or 0 to disable.

Returns: The opened EDT device handle if successful, or NULL if unsuccessful. Use edt_perror() to print an error message.

Once opened, the device handle may be used to perform I/O using edt_read(), edt_write(), edt_configure_ring_buffers(), and other input-output library calls. When finished, use edt_close() to release allocated resources.

See also: edt_open_channel(), edt_open_quiet(), edt_close()

◆ edt_set_port()

void edt_set_port	(	EdtDev	edt_p,
		EdtIOPort	port
	)

Set the port number, as distinct from the DMA channel.

Parameters

edt_p	The open EDT device handle.
port	Port number enum.

See also: edt_get_port(), edt_device_channel()

◆ edt_get_port()

EdtIOPort edt_get_port ( EdtDev edt_p )

Get the port number set by edt_set_port().

Parameters

edt_p The open EDT device handle.

Returns: Port number enum.

Routine to get the "port" number, as distinct from the dma channel

Functions

Detailed Description

Function Documentation

◆ edt_close()

◆ edt_open()

◆ edt_open_quiet()

◆ edt_open_channel()

◆ edt_open_device()

◆ edt_set_port()

◆ edt_get_port()