Device.h File Reference

#include <SoapySDR/Config.h>
#include <SoapySDR/Types.h>
#include <SoapySDR/Constants.h>
#include <SoapySDR/Errors.h>
#include <SoapySDR/Device.h>

Go to the source code of this file.

Typedefs
typedef struct SoapySDRDevice	SoapySDRDevice
	Forward declaration of device handle. More...
typedef struct SoapySDRStream	SoapySDRStream
	Forward declaration of stream handle. More...

Functions
SOAPY_SDR_API SoapySDRKwargs *	SoapySDRDevice_enumerate (const SoapySDRKwargs *args, size_t *length)
SOAPY_SDR_API SoapySDRKwargs *	SoapySDRDevice_enumerateStrArgs (const char *args, size_t *length)
SOAPY_SDR_API SoapySDRDevice *	SoapySDRDevice_make (const SoapySDRKwargs *args)
SOAPY_SDR_API SoapySDRDevice *	SoapySDRDevice_makeStrArgs (const char *args)
SOAPY_SDR_API void	SoapySDRDevice_unmake (SoapySDRDevice *device)
SOAPY_SDR_API char *	SoapySDRDevice_getDriverKey (const SoapySDRDevice *device)
SOAPY_SDR_API char *	SoapySDRDevice_getHardwareKey (const SoapySDRDevice *device)
SOAPY_SDR_API SoapySDRKwargs	SoapySDRDevice_getHardwareInfo (const SoapySDRDevice *device)
SOAPY_SDR_API char *	SoapySDRDevice_setFrontendMapping (SoapySDRDevice *device, const int direction, const char *mapping)
SOAPY_SDR_API char *	SoapySDRDevice_getFrontendMapping (const SoapySDRDevice *device, const int direction)
SOAPY_SDR_API size_t	SoapySDRDevice_getNumChannels (const SoapySDRDevice *device, const int direction)
SOAPY_SDR_API bool	SoapySDRDevice_getFullDuplex (const SoapySDRDevice *device, const int direction, const size_t channel)
SOAPY_SDR_API char **	SoapySDRDevice_getStreamFormats (const SoapySDRDevice *device, const int direction, const size_t channel, size_t *length)
SOAPY_SDR_API char *	SoapySDRDevice_getNativeStreamFormat (const SoapySDRDevice *device, const int direction, const size_t channel, double *fullScale)
SOAPY_SDR_API SoapySDRArgInfo *	SoapySDRDevice_getStreamArgsInfo (const SoapySDRDevice *device, const int direction, const size_t channel, size_t *length)
SOAPY_SDR_API char *	SoapySDRDevice_setupStream (SoapySDRDevice *device, SoapySDRStream **stream, const int direction, const char *format, const size_t *channels, const size_t numChans, const SoapySDRKwargs *args)
SOAPY_SDR_API void	SoapySDRDevice_closeStream (SoapySDRDevice *device, SoapySDRStream *stream)
SOAPY_SDR_API size_t	SoapySDRDevice_getStreamMTU (const SoapySDRDevice *device, SoapySDRStream *stream)
SOAPY_SDR_API int	SoapySDRDevice_activateStream (SoapySDRDevice *device, SoapySDRStream *stream, const int flags, const long long timeNs, const size_t numElems)
SOAPY_SDR_API int	SoapySDRDevice_deactivateStream (SoapySDRDevice *device, SoapySDRStream *stream, const int flags, const long long timeNs)
SOAPY_SDR_API int	SoapySDRDevice_readStream (SoapySDRDevice *device, SoapySDRStream *stream, void *const *buffs, const size_t numElems, int *flags, long long *timeNs, const long timeoutUs)
SOAPY_SDR_API int	SoapySDRDevice_writeStream (SoapySDRDevice *device, SoapySDRStream *stream, const void *const *buffs, const size_t numElems, int *flags, const long long timeNs, const long timeoutUs)
SOAPY_SDR_API int	SoapySDRDevice_readStreamStatus (SoapySDRDevice *device, SoapySDRStream *stream, size_t *chanMask, int *flags, long long *timeNs, const long timeoutUs)
SOAPY_SDR_API size_t	SoapySDRDevice_getNumDirectAccessBuffers (SoapySDRDevice *device, SoapySDRStream *stream)
SOAPY_SDR_API int	SoapySDRDevice_getDirectAccessBufferAddrs (SoapySDRDevice *device, SoapySDRStream *stream, const size_t handle, void **buffs)
SOAPY_SDR_API int	SoapySDRDevice_acquireReadBuffer (SoapySDRDevice *device, SoapySDRStream *stream, size_t *handle, const void **buffs, int *flags, long long *timeNs, const long timeoutUs)
SOAPY_SDR_API void	SoapySDRDevice_releaseReadBuffer (SoapySDRDevice *device, SoapySDRStream *stream, const size_t handle)
SOAPY_SDR_API int	SoapySDRDevice_acquireWriteBuffer (SoapySDRDevice *device, SoapySDRStream *stream, size_t *handle, void **buffs, const long timeoutUs)
SOAPY_SDR_API void	SoapySDRDevice_releaseWriteBuffer (SoapySDRDevice *device, SoapySDRStream *stream, const size_t handle, const size_t numElems, int *flags, const long long timeNs)
SOAPY_SDR_API char **	SoapySDRDevice_listAntennas (const SoapySDRDevice *device, const int direction, const size_t channel, size_t *length)
SOAPY_SDR_API char *	SoapySDRDevice_setAntenna (SoapySDRDevice *device, const int direction, const size_t channel, const char *name)
SOAPY_SDR_API char *	SoapySDRDevice_getAntenna (const SoapySDRDevice *device, const int direction, const size_t channel)
SOAPY_SDR_API bool	SoapySDRDevice_hasDCOffsetMode (const SoapySDRDevice *device, const int direction, const size_t channel)
SOAPY_SDR_API char *	SoapySDRDevice_setDCOffsetMode (SoapySDRDevice *device, const int direction, const size_t channel, const bool automatic)
SOAPY_SDR_API bool	SoapySDRDevice_getDCOffsetMode (const SoapySDRDevice *device, const int direction, const size_t channel)
SOAPY_SDR_API bool	SoapySDRDevice_hasDCOffset (const SoapySDRDevice *device, const int direction, const size_t channel)
SOAPY_SDR_API char *	SoapySDRDevice_setDCOffset (SoapySDRDevice *device, const int direction, const size_t channel, const double offsetI, const double offsetQ)
SOAPY_SDR_API void	SoapySDRDevice_getDCOffset (const SoapySDRDevice *device, const int direction, const size_t channel, double *offsetI, double *offsetQ)
SOAPY_SDR_API bool	SoapySDRDevice_hasIQBalance (const SoapySDRDevice *device, const int direction, const size_t channel)
SOAPY_SDR_API char *	SoapySDRDevice_setIQBalance (SoapySDRDevice *device, const int direction, const size_t channel, const double balanceI, const double balanceQ)
SOAPY_SDR_API void	SoapySDRDevice_getIQBalance (const SoapySDRDevice *device, const int direction, const size_t channel, double *balanceI, double *balanceQ)
SOAPY_SDR_API char **	SoapySDRDevice_listGains (const SoapySDRDevice *device, const int direction, const size_t channel, size_t *length)
SOAPY_SDR_API bool	SoapySDRDevice_hasGainMode (const SoapySDRDevice *device, const int direction, const size_t channel)
SOAPY_SDR_API char *	SoapySDRDevice_setGainMode (SoapySDRDevice *device, const int direction, const size_t channel, const bool automatic)
SOAPY_SDR_API bool	SoapySDRDevice_getGainMode (const SoapySDRDevice *device, const int direction, const size_t channel)
SOAPY_SDR_API char *	SoapySDRDevice_setGain (SoapySDRDevice *device, const int direction, const size_t channel, const double value)
SOAPY_SDR_API char *	SoapySDRDevice_setGainElement (SoapySDRDevice *device, const int direction, const size_t channel, const char *name, const double value)
SOAPY_SDR_API double	SoapySDRDevice_getGain (const SoapySDRDevice *device, const int direction, const size_t channel)
SOAPY_SDR_API double	SoapySDRDevice_getGainElement (const SoapySDRDevice *device, const int direction, const size_t channel, const char *name)
SOAPY_SDR_API SoapySDRRange	SoapySDRDevice_getGainRange (const SoapySDRDevice *device, const int direction, const size_t channel)
SOAPY_SDR_API SoapySDRRange	SoapySDRDevice_getGainElementRange (const SoapySDRDevice *device, const int direction, const size_t channel, const char *name)
SOAPY_SDR_API char *	SoapySDRDevice_setFrequency (SoapySDRDevice *device, const int direction, const size_t channel, const double frequency, const SoapySDRKwargs *args)
SOAPY_SDR_API char *	SoapySDRDevice_setFrequencyComponent (SoapySDRDevice *device, const int direction, const size_t channel, const char *name, const double frequency, const SoapySDRKwargs *args)
SOAPY_SDR_API double	SoapySDRDevice_getFrequency (const SoapySDRDevice *device, const int direction, const size_t channel)
SOAPY_SDR_API double	SoapySDRDevice_getFrequencyComponent (const SoapySDRDevice *device, const int direction, const size_t channel, const char *name)
SOAPY_SDR_API char **	SoapySDRDevice_listFrequencies (const SoapySDRDevice *device, const int direction, const size_t channel, size_t *length)
SOAPY_SDR_API SoapySDRRange *	SoapySDRDevice_getFrequencyRange (const SoapySDRDevice *device, const int direction, const size_t channel, size_t *length)
SOAPY_SDR_API SoapySDRRange *	SoapySDRDevice_getFrequencyRangeComponent (const SoapySDRDevice *device, const int direction, const size_t channel, const char *name, size_t *length)
SOAPY_SDR_API SoapySDRArgInfo *	SoapySDRDevice_getFrequencyArgsInfo (const SoapySDRDevice *device, const int direction, const size_t channel, size_t *length)
SOAPY_SDR_API char *	SoapySDRDevice_setSampleRate (SoapySDRDevice *device, const int direction, const size_t channel, const double rate)
SOAPY_SDR_API double	SoapySDRDevice_getSampleRate (const SoapySDRDevice *device, const int direction, const size_t channel)
SOAPY_SDR_API double *	SoapySDRDevice_listSampleRates (const SoapySDRDevice *device, const int direction, const size_t channel, size_t *length)
SOAPY_SDR_API char *	SoapySDRDevice_setBandwidth (SoapySDRDevice *device, const int direction, const size_t channel, const double bw)
SOAPY_SDR_API double	SoapySDRDevice_getBandwidth (const SoapySDRDevice *device, const int direction, const size_t channel)
SOAPY_SDR_API double *	SoapySDRDevice_listBandwidths (const SoapySDRDevice *device, const int direction, const size_t channel, size_t *length)
SOAPY_SDR_API char *	SoapySDRDevice_setMasterClockRate (SoapySDRDevice *device, const double rate)
SOAPY_SDR_API double	SoapySDRDevice_getMasterClockRate (const SoapySDRDevice *device)
SOAPY_SDR_API SoapySDRRange *	SoapySDRDevice_getMasterClockRates (const SoapySDRDevice *device, size_t *length)
SOAPY_SDR_API char **	SoapySDRDevice_listClockSources (const SoapySDRDevice *device, size_t *length)
SOAPY_SDR_API char *	SoapySDRDevice_setClockSource (SoapySDRDevice *device, const char *source)
SOAPY_SDR_API char *	SoapySDRDevice_getClockSource (const SoapySDRDevice *device)
SOAPY_SDR_API char **	SoapySDRDevice_listTimeSources (const SoapySDRDevice *device, size_t *length)
SOAPY_SDR_API char *	SoapySDRDevice_setTimeSource (SoapySDRDevice *device, const char *source)
SOAPY_SDR_API char *	SoapySDRDevice_getTimeSource (const SoapySDRDevice *device)
SOAPY_SDR_API bool	SoapySDRDevice_hasHardwareTime (const SoapySDRDevice *device, const char *what)
SOAPY_SDR_API long long	SoapySDRDevice_getHardwareTime (const SoapySDRDevice *device, const char *what)
SOAPY_SDR_API void	SoapySDRDevice_setHardwareTime (SoapySDRDevice *device, const long long timeNs, const char *what)
SOAPY_SDR_API void	SoapySDRDevice_setCommandTime (SoapySDRDevice *device, const long long timeNs, const char *what)
SOAPY_SDR_API char **	SoapySDRDevice_listSensors (const SoapySDRDevice *device, size_t *length)
SOAPY_SDR_API SoapySDRArgInfo	SoapySDRDevice_getSensorInfo (const SoapySDRDevice *device, const char *name)
SOAPY_SDR_API char *	SoapySDRDevice_readSensor (const SoapySDRDevice *device, const char *name)
SOAPY_SDR_API char **	SoapySDRDevice_listChannelSensors (const SoapySDRDevice *device, const int direction, const size_t channel, size_t *length)
SOAPY_SDR_API SoapySDRArgInfo	SoapySDRDevice_getChannelSensorInfo (const SoapySDRDevice *device, const int direction, const size_t channel, const char *name)
SOAPY_SDR_API char *	SoapySDRDevice_readChannelSensor (const SoapySDRDevice *device, const int direction, const size_t channel, const char *name)
SOAPY_SDR_API void	SoapySDRDevice_writeRegister (SoapySDRDevice *device, const unsigned addr, const unsigned value)
SOAPY_SDR_API unsigned	SoapySDRDevice_readRegister (const SoapySDRDevice *device, const unsigned addr)
SOAPY_SDR_API SoapySDRArgInfo *	SoapySDRDevice_getSettingInfo (const SoapySDRDevice *device, size_t *length)
SOAPY_SDR_API void	SoapySDRDevice_writeSetting (SoapySDRDevice *device, const char *key, const char *value)
SOAPY_SDR_API char *	SoapySDRDevice_readSetting (const SoapySDRDevice *device, const char *key)
SOAPY_SDR_API char **	SoapySDRDevice_listGPIOBanks (const SoapySDRDevice *device, size_t *length)
SOAPY_SDR_API void	SoapySDRDevice_writeGPIO (SoapySDRDevice *device, const char *bank, const unsigned value)
SOAPY_SDR_API void	SoapySDRDevice_writeGPIOMasked (SoapySDRDevice *device, const char *bank, const unsigned value, const unsigned mask)
SOAPY_SDR_API unsigned	SoapySDRDevice_readGPIO (const SoapySDRDevice *device, const char *bank)
SOAPY_SDR_API void	SoapySDRDevice_writeGPIODir (SoapySDRDevice *device, const char *bank, const unsigned dir)
SOAPY_SDR_API void	SoapySDRDevice_writeGPIODirMasked (SoapySDRDevice *device, const char *bank, const unsigned dir, const unsigned mask)
SOAPY_SDR_API unsigned	SoapySDRDevice_readGPIODir (const SoapySDRDevice *device, const char *bank)
SOAPY_SDR_API void	SoapySDRDevice_writeI2C (SoapySDRDevice *device, const int addr, const char *data, const size_t numBytes)
SOAPY_SDR_API char *	SoapySDRDevice_readI2C (SoapySDRDevice *device, const int addr, const size_t numBytes)
SOAPY_SDR_API unsigned	SoapySDRDevice_transactSPI (SoapySDRDevice *device, const int addr, const unsigned data, const size_t numBits)
SOAPY_SDR_API char **	SoapySDRDevice_listUARTs (const SoapySDRDevice *device, size_t *length)
SOAPY_SDR_API void	SoapySDRDevice_writeUART (SoapySDRDevice *device, const char *which, const char *data)
SOAPY_SDR_API char *	SoapySDRDevice_readUART (const SoapySDRDevice *device, const char *which, const long timeoutUs)

Detailed Description

Interface definition for Soapy SDR devices. This is the C version of the Device interface.

General design rules about the API: The caller must free non-const array results.

Copyright

Copyright (c) 2014-2016 Josh Blum SPDX-License-Identifier: BSL-1.0

Typedef Documentation

typedef struct SoapySDRDevice SoapySDRDevice

Forward declaration of device handle.

typedef struct SoapySDRStream SoapySDRStream

Forward declaration of stream handle.

Function Documentation

SOAPY_SDR_API int SoapySDRDevice_acquireReadBuffer	(	SoapySDRDevice *	device,
		SoapySDRStream *	stream,
		size_t *	handle,
		const void **	buffs,
		int *	flags,
		long long *	timeNs,
		const long	timeoutUs
	)

Acquire direct buffers from a receive stream. This call is part of the direct buffer access API.

The buffs array will be filled with a stream pointer for each channel. Each pointer can be read up to the number of return value elements.

The handle will be set by the implementation so that the caller may later release access to the buffers with releaseReadBuffer(). Handle represents an index into the internal scatter/gather table such that handle is between 0 and num direct buffers - 1.

Parameters

device	a pointer to a device instance
stream	the opaque pointer to a stream handle
handle	an index value used in the release() call
buffs	an array of void* buffers num chans in size
flags	optional flag indicators about the result
timeNs	the buffer's timestamp in nanoseconds
timeoutUs	the timeout in microseconds

Returns

the number of elements read per buffer or error code

SOAPY_SDR_API int SoapySDRDevice_acquireWriteBuffer	(	SoapySDRDevice *	device,
		SoapySDRStream *	stream,
		size_t *	handle,
		void **	buffs,
		const long	timeoutUs
	)

Acquire direct buffers from a transmit stream. This call is part of the direct buffer access API.

The buffs array will be filled with a stream pointer for each channel. Each pointer can be written up to the number of return value elements.

The handle will be set by the implementation so that the caller may later release access to the buffers with releaseWriteBuffer(). Handle represents an index into the internal scatter/gather table such that handle is between 0 and num direct buffers - 1.

Parameters

device	a pointer to a device instance
stream	the opaque pointer to a stream handle
handle	an index value used in the release() call
buffs	an array of void* buffers num chans in size
flags	optional input flags and output flags
timeNs	the buffer's timestamp in nanoseconds
timeoutUs	the timeout in microseconds

Returns

the number of available elements per buffer or error

SOAPY_SDR_API int SoapySDRDevice_activateStream	(	SoapySDRDevice *	device,
		SoapySDRStream *	stream,
		const int	flags,
		const long long	timeNs,
		const size_t	numElems
	)

Activate a stream. Call activate to prepare a stream before using read/write(). The implementation control switches or stimulate data flow.

The timeNs is only valid when the flags have SOAPY_SDR_HAS_TIME. The numElems count can be used to request a finite burst size. The SOAPY_SDR_END_BURST flag can signal end on the finite burst. Not all implementations will support the full range of options. In this case, the implementation returns SOAPY_SDR_NOT_SUPPORTED.

Parameters

device	a pointer to a device instance
stream	the opaque pointer to a stream handle
flags	optional flag indicators about the stream
timeNs	optional activation time in nanoseconds
numElems	optional element count for burst control

Returns

0 for success or error code on failure

SOAPY_SDR_API void SoapySDRDevice_closeStream	(	SoapySDRDevice *	device,
		SoapySDRStream *	stream
	)

Close an open stream created by setupStream

Parameters

device	a pointer to a device instance
stream	the opaque pointer to a stream handle

SOAPY_SDR_API int SoapySDRDevice_deactivateStream	(	SoapySDRDevice *	device,
		SoapySDRStream *	stream,
		const int	flags,
		const long long	timeNs
	)

Deactivate a stream. Call deactivate when not using using read/write(). The implementation control switches or halt data flow.

The timeNs is only valid when the flags have SOAPY_SDR_HAS_TIME. Not all implementations will support the full range of options. In this case, the implementation returns SOAPY_SDR_NOT_SUPPORTED.

Parameters

device	a pointer to a device instance
stream	the opaque pointer to a stream handle
flags	optional flag indicators about the stream
timeNs	optional deactivation time in nanoseconds

Returns

0 for success or error code on failure

SOAPY_SDR_API SoapySDRKwargs* SoapySDRDevice_enumerate	(	const SoapySDRKwargs *	args,
		size_t *	length
	)

Enumerate a list of available devices on the system.

Parameters

	args	device construction key/value argument filters
[out]	length	the number of elements in the result.

Returns

a list of arguments strings, each unique to a device

SOAPY_SDR_API SoapySDRKwargs* SoapySDRDevice_enumerateStrArgs	(	const char *	args,
		size_t *	length
	)

Enumerate a list of available devices on the system. Markup format for args: "keyA=valA, keyB=valB".

Parameters

	args	a markup string of key/value argument filters
[out]	length	the number of elements in the result.

Returns

a list of arguments strings, each unique to a device

SOAPY_SDR_API char* SoapySDRDevice_getAntenna	(	const SoapySDRDevice *	device,
		const int	direction,
		const size_t	channel
	)

Get the selected antenna on a chain.

Parameters

device	a pointer to a device instance
direction	the channel direction RX or TX
channel	an available channel on the device

Returns

the name of an available antenna

SOAPY_SDR_API double SoapySDRDevice_getBandwidth	(	const SoapySDRDevice *	device,
		const int	direction,
		const size_t	channel
	)

Get the baseband filter width of the chain.

Parameters

device	a pointer to a device instance
direction	the channel direction RX or TX
channel	an available channel on the device

Returns

the baseband filter width in Hz

SOAPY_SDR_API SoapySDRArgInfo SoapySDRDevice_getChannelSensorInfo	(	const SoapySDRDevice *	device,
		const int	direction,
		const size_t	channel,
		const char *	name
	)

Get meta-information about a channel sensor. Example: displayable name, type, range.

Parameters

device	a pointer to a device instance
direction	the channel direction RX or TX
channel	an available channel on the device
name	the name of an available sensor

Returns

meta-information about a sensor

SOAPY_SDR_API char* SoapySDRDevice_getClockSource

(

const SoapySDRDevice *

device

)

Get the clock source of the device

Parameters

device

a pointer to a device instance

Returns

the name of a clock source

SOAPY_SDR_API void SoapySDRDevice_getDCOffset	(	const SoapySDRDevice *	device,
		const int	direction,
		const size_t	channel,
		double *	offsetI,
		double *	offsetQ
	)

Get the frontend DC offset correction.

Parameters

	device	a pointer to a device instance
	direction	the channel direction RX or TX
	channel	an available channel on the device
[out]	offsetI	the relative correction (1.0 max)
[out]	offsetQ	the relative correction (1.0 max)

SOAPY_SDR_API bool SoapySDRDevice_getDCOffsetMode	(	const SoapySDRDevice *	device,
		const int	direction,
		const size_t	channel
	)

Get the automatic DC offset corrections mode.

Parameters

device	a pointer to a device instance
direction	the channel direction RX or TX
channel	an available channel on the device

Returns

true for automatic offset correction

SOAPY_SDR_API int SoapySDRDevice_getDirectAccessBufferAddrs	(	SoapySDRDevice *	device,
		SoapySDRStream *	stream,
		const size_t	handle,
		void **	buffs
	)

Get the buffer addresses for a scatter/gather table entry. When the underlying DMA implementation uses scatter/gather then this call provides the user addresses for that table.

Example: The caller may query the DMA memory addresses once after stream creation to pre-allocate a re-usable ring-buffer.

Parameters

device	a pointer to a device instance
stream	the opaque pointer to a stream handle
handle	an index value between 0 and num direct buffers - 1
buffs	an array of void* buffers num chans in size

Returns

0 for success or error code when not supported

SOAPY_SDR_API char* SoapySDRDevice_getDriverKey

(

const SoapySDRDevice *

device

)

A key that uniquely identifies the device driver. This key identifies the underlying implementation. Serveral variants of a product may share a driver.

Parameters

device

a pointer to a device instance

SOAPY_SDR_API double SoapySDRDevice_getFrequency	(	const SoapySDRDevice *	device,
		const int	direction,
		const size_t	channel
	)

Get the overall center frequency of the chain.

• For RX, this specifies the down-conversion frequency.
• For TX, this specifies the up-conversion frequency.

  Parameters

  device	a pointer to a device instance
  direction	the channel direction RX or TX
  channel	an available channel on the device

  Returns

  the center frequency in Hz

SOAPY_SDR_API SoapySDRArgInfo* SoapySDRDevice_getFrequencyArgsInfo	(	const SoapySDRDevice *	device,
		const int	direction,
		const size_t	channel,
		size_t *	length
	)

Query the argument info description for tune args.

Parameters

	device	a pointer to a device instance
	direction	the channel direction RX or TX
	channel	an available channel on the device
[out]	length	the number of argument infos

Returns

a list of argument info structures

SOAPY_SDR_API double SoapySDRDevice_getFrequencyComponent	(	const SoapySDRDevice *	device,
		const int	direction,
		const size_t	channel,
		const char *	name
	)

Get the frequency of a tunable element in the chain.

Parameters

device	a pointer to a device instance
direction	the channel direction RX or TX
channel	an available channel on the device
name	the name of a tunable element

Returns

the tunable element's frequency in Hz

SOAPY_SDR_API SoapySDRRange* SoapySDRDevice_getFrequencyRange	(	const SoapySDRDevice *	device,
		const int	direction,
		const size_t	channel,
		size_t *	length
	)

Get the range of overall frequency values.

Parameters

	device	a pointer to a device instance
	direction	the channel direction RX or TX
	channel	an available channel on the device
[out]	length	the number of ranges

Returns

a list of frequency ranges in Hz

SOAPY_SDR_API SoapySDRRange* SoapySDRDevice_getFrequencyRangeComponent	(	const SoapySDRDevice *	device,
		const int	direction,
		const size_t	channel,
		const char *	name,
		size_t *	length
	)

Get the range of tunable values for the specified element.

Parameters

	device	a pointer to a device instance
	direction	the channel direction RX or TX
	channel	an available channel on the device
	name	the name of a tunable element
[out]	length	the number of ranges

Returns

a list of frequency ranges in Hz

SOAPY_SDR_API char* SoapySDRDevice_getFrontendMapping	(	const SoapySDRDevice *	device,
		const int	direction
	)

Get the mapping configuration string.

Parameters

device	a pointer to a device instance
direction	the channel direction RX or TX
the	vendor-specific mapping string

SOAPY_SDR_API bool SoapySDRDevice_getFullDuplex	(	const SoapySDRDevice *	device,
		const int	direction,
		const size_t	channel
	)

Find out if the specified channel is full or half duplex.

Parameters

device	a pointer to a device instance
direction	the channel direction RX or TX
channel	an available channel on the device

Returns

true for full duplex, false for half duplex

SOAPY_SDR_API double SoapySDRDevice_getGain	(	const SoapySDRDevice *	device,
		const int	direction,
		const size_t	channel
	)

Get the overall value of the gain elements in a chain.

Parameters

device	a pointer to a device instance
direction	the channel direction RX or TX
channel	an available channel on the device

Returns

the value of the gain in dB

SOAPY_SDR_API double SoapySDRDevice_getGainElement	(	const SoapySDRDevice *	device,
		const int	direction,
		const size_t	channel,
		const char *	name
	)

Get the value of an individual amplification element in a chain.

Parameters

device	a pointer to a device instance
direction	the channel direction RX or TX
channel	an available channel on the device
name	the name of an amplification element

Returns

the value of the gain in dB

SOAPY_SDR_API SoapySDRRange SoapySDRDevice_getGainElementRange	(	const SoapySDRDevice *	device,
		const int	direction,
		const size_t	channel,
		const char *	name
	)

Get the range of possible gain values for a specific element.

Parameters

device	a pointer to a device instance
direction	the channel direction RX or TX
channel	an available channel on the device
name	the name of an amplification element

Returns

a list of gain ranges in dB

SOAPY_SDR_API bool SoapySDRDevice_getGainMode	(	const SoapySDRDevice *	device,
		const int	direction,
		const size_t	channel
	)

Get the automatic gain mode on the chain.

Parameters

device	a pointer to a device instance
direction	the channel direction RX or TX
channel	an available channel on the device

Returns

true for automatic gain setting

SOAPY_SDR_API SoapySDRRange SoapySDRDevice_getGainRange	(	const SoapySDRDevice *	device,
		const int	direction,
		const size_t	channel
	)

Get the overall range of possible gain values.

Parameters

device	a pointer to a device instance
direction	the channel direction RX or TX
channel	an available channel on the device

Returns

a list of gain ranges in dB

SOAPY_SDR_API SoapySDRKwargs SoapySDRDevice_getHardwareInfo

(

const SoapySDRDevice *

device

)

Query a dictionary of available device information. This dictionary can any number of values like vendor name, product name, revisions, serials... This information can be displayed to the user to help identify the instantiated device.

Parameters

device

a pointer to a device instance

SOAPY_SDR_API char* SoapySDRDevice_getHardwareKey

(

const SoapySDRDevice *

device

)

A key that uniquely identifies the hardware. This key should be meaningful to the user to optimize for the underlying hardware.

Parameters

device

a pointer to a device instance

SOAPY_SDR_API long long SoapySDRDevice_getHardwareTime	(	const SoapySDRDevice *	device,
		const char *	what
	)

Read the time from the hardware clock on the device. The what argument can refer to a specific time counter.

Parameters

device	a pointer to a device instance
what	optional argument

Returns

the time in nanoseconds

SOAPY_SDR_API void SoapySDRDevice_getIQBalance	(	const SoapySDRDevice *	device,
		const int	direction,
		const size_t	channel,
		double *	balanceI,
		double *	balanceQ
	)

Get the frontend IQ balance correction.

Parameters

	device	a pointer to a device instance
	direction	the channel direction RX or TX
	channel	an available channel on the device
[out]	balanceI	the relative correction (1.0 max)
[out]	balanceQ	the relative correction (1.0 max)

SOAPY_SDR_API double SoapySDRDevice_getMasterClockRate

(

const SoapySDRDevice *

device

)

Get the master clock rate of the device.

Parameters

device

a pointer to a device instance

Returns

the clock rate in Hz

SOAPY_SDR_API SoapySDRRange* SoapySDRDevice_getMasterClockRates	(	const SoapySDRDevice *	device,
		size_t *	length
	)

Get the range of available master clock rates.

Parameters

	device	a pointer to a device instance
[out]	length	the number of ranges

Returns

a list of clock rate ranges in Hz

SOAPY_SDR_API char* SoapySDRDevice_getNativeStreamFormat	(	const SoapySDRDevice *	device,
		const int	direction,
		const size_t	channel,
		double *	fullScale
	)

Get the hardware's native stream format for this channel. This is the format used by the underlying transport layer, and the direct buffer access API calls (when available).

Parameters

	device	a pointer to a device instance
	direction	the channel direction RX or TX
	channel	an available channel on the device
[out]	fullScale	the maximum possible value

Returns

the native stream buffer format string

SOAPY_SDR_API size_t SoapySDRDevice_getNumChannels	(	const SoapySDRDevice *	device,
		const int	direction
	)

Get a number of channels given the streaming direction

Parameters

device	a pointer to a device instance
direction	the channel direction RX or TX

Returns

the number of channels

SOAPY_SDR_API size_t SoapySDRDevice_getNumDirectAccessBuffers	(	SoapySDRDevice *	device,
		SoapySDRStream *	stream
	)

How many direct access buffers can the stream provide? This is the number of times the user can call acquire() on a stream without making subsequent calls to release(). A return value of 0 means that direct access is not supported.

Parameters

device	a pointer to a device instance
stream	the opaque pointer to a stream handle

Returns

the number of direct access buffers or 0

SOAPY_SDR_API double SoapySDRDevice_getSampleRate	(	const SoapySDRDevice *	device,
		const int	direction,
		const size_t	channel
	)

Get the baseband sample rate of the chain.

Parameters

device	a pointer to a device instance
direction	the channel direction RX or TX
channel	an available channel on the device

Returns

the sample rate in samples per second

SOAPY_SDR_API SoapySDRArgInfo SoapySDRDevice_getSensorInfo	(	const SoapySDRDevice *	device,
		const char *	name
	)

Get meta-information about a sensor. Example: displayable name, type, range.

Parameters

device	a pointer to a device instance
name	the name of an available sensor

Returns

meta-information about a sensor

SOAPY_SDR_API SoapySDRArgInfo* SoapySDRDevice_getSettingInfo	(	const SoapySDRDevice *	device,
		size_t *	length
	)

Describe the allowed keys and values used for settings.

Parameters

	device	a pointer to a device instance
[out]	length	the number of sensor names

Returns

a list of argument info structures

SOAPY_SDR_API SoapySDRArgInfo* SoapySDRDevice_getStreamArgsInfo	(	const SoapySDRDevice *	device,
		const int	direction,
		const size_t	channel,
		size_t *	length
	)

Query the argument info description for stream args.

Parameters

	device	a pointer to a device instance
	direction	the channel direction RX or TX
	channel	an available channel on the device
[out]	length	the number of argument infos

Returns

a list of argument info structures

SOAPY_SDR_API char** SoapySDRDevice_getStreamFormats	(	const SoapySDRDevice *	device,
		const int	direction,
		const size_t	channel,
		size_t *	length
	)

Query a list of the available stream formats.

Parameters

	device	a pointer to a device instance
	direction	the channel direction RX or TX
	channel	an available channel on the device
[out]	length	the number of format strings

Returns

a list of allowed format strings

SOAPY_SDR_API size_t SoapySDRDevice_getStreamMTU	(	const SoapySDRDevice *	device,
		SoapySDRStream *	stream
	)

Get the stream's maximum transmission unit (MTU) in number of elements. The MTU specifies the maximum payload transfer in a stream operation. This value can be used as a stream buffer allocation size that can best optimize throughput given the underlying stream implementation.

Parameters

device	a pointer to a device instance
stream	the opaque pointer to a stream handle

Returns

the MTU in number of stream elements (never zero)

SOAPY_SDR_API char* SoapySDRDevice_getTimeSource

(

const SoapySDRDevice *

device

)

Get the time source of the device

Parameters

device

a pointer to a device instance

Returns

the name of a time source

SOAPY_SDR_API bool SoapySDRDevice_hasDCOffset	(	const SoapySDRDevice *	device,
		const int	direction,
		const size_t	channel
	)

Does the device support frontend DC offset correction?

Parameters

device	a pointer to a device instance
direction	the channel direction RX or TX
channel	an available channel on the device

Returns

true if DC offset corrections are supported

SOAPY_SDR_API bool SoapySDRDevice_hasDCOffsetMode	(	const SoapySDRDevice *	device,
		const int	direction,
		const size_t	channel
	)

Does the device support automatic DC offset corrections?

Parameters

device	a pointer to a device instance
direction	the channel direction RX or TX
channel	an available channel on the device

Returns

true if automatic corrections are supported

SOAPY_SDR_API bool SoapySDRDevice_hasGainMode	(	const SoapySDRDevice *	device,
		const int	direction,
		const size_t	channel
	)

Does the device support automatic gain control?

Parameters

device	a pointer to a device instance
direction	the channel direction RX or TX
channel	an available channel on the device

Returns

true for automatic gain control

SOAPY_SDR_API bool SoapySDRDevice_hasHardwareTime	(	const SoapySDRDevice *	device,
		const char *	what
	)

Does this device have a hardware clock?

Parameters

device	a pointer to a device instance
what	optional argument

Returns

true if the hardware clock exists

SOAPY_SDR_API bool SoapySDRDevice_hasIQBalance	(	const SoapySDRDevice *	device,
		const int	direction,
		const size_t	channel
	)

Does the device support frontend IQ balance correction?

Parameters

device	a pointer to a device instance
direction	the channel direction RX or TX
channel	an available channel on the device

Returns

true if IQ balance corrections are supported

SOAPY_SDR_API char** SoapySDRDevice_listAntennas	(	const SoapySDRDevice *	device,
		const int	direction,
		const size_t	channel,
		size_t *	length
	)

Get a list of available antennas to select on a given chain.

Parameters

	device	a pointer to a device instance
	direction	the channel direction RX or TX
	channel	an available channel on the device
[out]	length	the number of antenna names

Returns

a list of available antenna names

SOAPY_SDR_API double* SoapySDRDevice_listBandwidths	(	const SoapySDRDevice *	device,
		const int	direction,
		const size_t	channel,
		size_t *	length
	)

Get the range of possible baseband filter widths.

Parameters

	device	a pointer to a device instance
	direction	the channel direction RX or TX
	channel	an available channel on the device
[out]	length	the number of bandwidths

Returns

a list of possible bandwidths in Hz

SOAPY_SDR_API char** SoapySDRDevice_listChannelSensors	(	const SoapySDRDevice *	device,
		const int	direction,
		const size_t	channel,
		size_t *	length
	)

List the available channel readback sensors. A sensor can represent a reference lock, RSSI, temperature.

Parameters

	device	a pointer to a device instance
	direction	the channel direction RX or TX
	channel	an available channel on the device
[out]	length	the number of sensor names

Returns

a list of available sensor string names

SOAPY_SDR_API char** SoapySDRDevice_listClockSources	(	const SoapySDRDevice *	device,
		size_t *	length
	)

Get the list of available clock sources.

Parameters

	device	a pointer to a device instance
[out]	length	the number of sources

Returns

a list of clock source names

SOAPY_SDR_API char** SoapySDRDevice_listFrequencies	(	const SoapySDRDevice *	device,
		const int	direction,
		const size_t	channel,
		size_t *	length
	)

List available tunable elements in the chain. Elements should be in order RF to baseband.

Parameters

	device	a pointer to a device instance
	direction	the channel direction RX or TX
	channel	an available channel
[out]	length	the number names

Returns

a list of tunable elements by name

SOAPY_SDR_API char** SoapySDRDevice_listGains	(	const SoapySDRDevice *	device,
		const int	direction,
		const size_t	channel,
		size_t *	length
	)

List available amplification elements. Elements should be in order RF to baseband.

Parameters

	device	a pointer to a device instance
	direction	the channel direction RX or TX
	channel	an available channel
[out]	length	the number of gain names

Returns

a list of gain string names

SOAPY_SDR_API char** SoapySDRDevice_listGPIOBanks	(	const SoapySDRDevice *	device,
		size_t *	length
	)

Get a list of available GPIO banks by name.

Parameters

[out]	length	the number of GPIO banks
	device	a pointer to a device instance

SOAPY_SDR_API double* SoapySDRDevice_listSampleRates	(	const SoapySDRDevice *	device,
		const int	direction,
		const size_t	channel,
		size_t *	length
	)

Get the range of possible baseband sample rates.

Parameters

	device	a pointer to a device instance
	direction	the channel direction RX or TX
	channel	an available channel on the device
[out]	length	the number of sample rates

Returns

a list of possible rates in samples per second

SOAPY_SDR_API char** SoapySDRDevice_listSensors	(	const SoapySDRDevice *	device,
		size_t *	length
	)

List the available global readback sensors. A sensor can represent a reference lock, RSSI, temperature.

Parameters

	device	a pointer to a device instance
[out]	length	the number of sensor names

Returns

a list of available sensor string names

SOAPY_SDR_API char** SoapySDRDevice_listTimeSources	(	const SoapySDRDevice *	device,
		size_t *	length
	)

Get the list of available time sources.

Parameters

	device	a pointer to a device instance
[out]	length	the number of sources

Returns

a list of time source names

SOAPY_SDR_API char** SoapySDRDevice_listUARTs	(	const SoapySDRDevice *	device,
		size_t *	length
	)

Enumerate the available UART devices.

Parameters

	device	a pointer to a device instance
[out]	length	the number of UART names

Returns

a list of names of available UARTs

SOAPY_SDR_API SoapySDRDevice* SoapySDRDevice_make

(

const SoapySDRKwargs *

args

)

Make a new Device object given device construction args. The device pointer will be stored in a table so subsequent calls with the same arguments will produce the same device. For every call to make, there should be a matched call to unmake.

Note

This call is not thread safe. Implementations calling into make from multiple threads should protect this call with a mutex.

Parameters

args	device construction key/value argument map

Returns

a pointer to a new Device object

SOAPY_SDR_API SoapySDRDevice* SoapySDRDevice_makeStrArgs

(

const char *

args

)

Make a new Device object given device construction args. The device pointer will be stored in a table so subsequent calls with the same arguments will produce the same device. For every call to make, there should be a matched call to unmake.

Note

This call is not thread safe. Implementations calling into make from multiple threads should protect this call with a mutex.

Parameters

args	a markup string of key/value arguments

Returns

a pointer to a new Device object

SOAPY_SDR_API char* SoapySDRDevice_readChannelSensor	(	const SoapySDRDevice *	device,
		const int	direction,
		const size_t	channel,
		const char *	name
	)

Readback a channel sensor given the name. The value returned is a string which can represent a boolean ("true"/"false"), an integer, or float.

Parameters

device	a pointer to a device instance
direction	the channel direction RX or TX
channel	an available channel on the device
name	the name of an available sensor

Returns

the current value of the sensor

SOAPY_SDR_API unsigned SoapySDRDevice_readGPIO	(	const SoapySDRDevice *	device,
		const char *	bank
	)

Readback the value of a GPIO bank.

Parameters

device	a pointer to a device instance
bank	the name of an available bank

Returns

an integer representing GPIO bits

SOAPY_SDR_API unsigned SoapySDRDevice_readGPIODir	(	const SoapySDRDevice *	device,
		const char *	bank
	)

Read the data direction of a GPIO bank.

Parameters

device	a pointer to a device instance 1 bits represent outputs, 0 bits represent inputs.
bank	the name of an available bank

Returns

an integer representing data direction bits

SOAPY_SDR_API char* SoapySDRDevice_readI2C	(	SoapySDRDevice *	device,
		const int	addr,
		const size_t	numBytes
	)

Read from an available I2C slave. If the device contains multiple I2C masters, the address bits can encode which master.

Parameters

device	a pointer to a device instance
addr	the address of the slave
numBytes	the number of bytes to read

Returns

an array of bytes read from the slave

SOAPY_SDR_API unsigned SoapySDRDevice_readRegister	(	const SoapySDRDevice *	device,
		const unsigned	addr
	)

Read a register on the device.

Parameters

device	a pointer to a device instance
addr	the register address

Returns

the register value

SOAPY_SDR_API char* SoapySDRDevice_readSensor	(	const SoapySDRDevice *	device,
		const char *	name
	)

Readback a global sensor given the name. The value returned is a string which can represent a boolean ("true"/"false"), an integer, or float.

Parameters

device	a pointer to a device instance
name	the name of an available sensor

Returns

the current value of the sensor

SOAPY_SDR_API char* SoapySDRDevice_readSetting	(	const SoapySDRDevice *	device,
		const char *	key
	)

Read an arbitrary setting on the device.

Parameters

device	a pointer to a device instance
key	the setting identifier

Returns

the setting value

SOAPY_SDR_API int SoapySDRDevice_readStream	(	SoapySDRDevice *	device,
		SoapySDRStream *	stream,
		void *const *	buffs,
		const size_t	numElems,
		int *	flags,
		long long *	timeNs,
		const long	timeoutUs
	)

Read elements from a stream for reception. This is a multi-channel call, and buffs should be an array of void *, where each pointer will be filled with data from a different channel.

Client code compatibility: The readStream() call should be well defined at all times, including prior to activation and after deactivation. When inactive, readStream() should implement the timeout specified by the caller and return SOAPY_SDR_TIMEOUT.

Parameters

	device	a pointer to a device instance
	stream	the opaque pointer to a stream handle
	buffs	an array of void* buffers num chans in size
	numElems	the number of elements in each buffer
[out]	flags	optional flag indicators about the result
[out]	timeNs	the buffer's timestamp in nanoseconds
	timeoutUs	the timeout in microseconds

Returns

the number of elements read per buffer or error code

SOAPY_SDR_API int SoapySDRDevice_readStreamStatus	(	SoapySDRDevice *	device,
		SoapySDRStream *	stream,
		size_t *	chanMask,
		int *	flags,
		long long *	timeNs,
		const long	timeoutUs
	)

Readback status information about a stream. This call is typically used on a transmit stream to report time errors, underflows, and burst completion.

Client code compatibility: Client code may continually poll readStreamStatus() in a loop. Implementations of readStreamStatus() should wait in the call for a status change event or until the timeout expiration. When stream status is not implemented on a particular stream, readStreamStatus() should return SOAPY_SDR_NOT_SUPPORTED. Client code may use this indication to disable a polling loop.

Parameters

device	a pointer to a device instance
stream	the opaque pointer to a stream handle
chanMask	to which channels this status applies
flags	optional input flags and output flags
timeNs	the buffer's timestamp in nanoseconds
timeoutUs	the timeout in microseconds

Returns

0 for success or error code like timeout

SOAPY_SDR_API char* SoapySDRDevice_readUART	(	const SoapySDRDevice *	device,
		const char *	which,
		const long	timeoutUs
	)

Read bytes from a UART until timeout or newline. Its up to the implementation to set the baud rate, carriage return settings, flushing on newline.

Parameters

device	a pointer to a device instance
which	the name of an available UART
timeoutUs	a timeout in microseconds

Returns

a null terminated array of bytes

SOAPY_SDR_API void SoapySDRDevice_releaseReadBuffer	(	SoapySDRDevice *	device,
		SoapySDRStream *	stream,
		const size_t	handle
	)

Release an acquired buffer back to the receive stream. This call is part of the direct buffer access API.

Parameters

device	a pointer to a device instance
stream	the opaque pointer to a stream handle
handle	the opaque handle from the acquire() call

SOAPY_SDR_API void SoapySDRDevice_releaseWriteBuffer	(	SoapySDRDevice *	device,
		SoapySDRStream *	stream,
		const size_t	handle,
		const size_t	numElems,
		int *	flags,
		const long long	timeNs
	)

Release an acquired buffer back to the transmit stream. This call is part of the direct buffer access API.

Stream meta-data is provided as part of the release call, and not the acquire call so that the caller may acquire buffers without committing to the contents of the meta-data, which can be determined by the user as the buffers are filled.

Parameters

device	a pointer to a device instance
stream	the opaque pointer to a stream handle
handle	the opaque handle from the acquire() call
numElems	the number of elements written to each buffer
flags	optional input flags and output flags
timeNs	the buffer's timestamp in nanoseconds

SOAPY_SDR_API char* SoapySDRDevice_setAntenna	(	SoapySDRDevice *	device,
		const int	direction,
		const size_t	channel,
		const char *	name
	)

Set the selected antenna on a chain.

Parameters

device	a pointer to a device instance
direction	the channel direction RX or TX
channel	an available channel on the device
name	the name of an available antenna

Returns

an error message or NULL for success

SOAPY_SDR_API char* SoapySDRDevice_setBandwidth	(	SoapySDRDevice *	device,
		const int	direction,
		const size_t	channel,
		const double	bw
	)

Set the baseband filter width of the chain.

Parameters

device	a pointer to a device instance
direction	the channel direction RX or TX
channel	an available channel on the device
bw	the baseband filter width in Hz

Returns

an error message or NULL for success

SOAPY_SDR_API char* SoapySDRDevice_setClockSource	(	SoapySDRDevice *	device,
		const char *	source
	)

Set the clock source on the device

Parameters

device	a pointer to a device instance
source	the name of a clock source

Returns

an error message or NULL for success

SOAPY_SDR_API void SoapySDRDevice_setCommandTime	(	SoapySDRDevice *	device,
		const long long	timeNs,
		const char *	what
	)

Set the time of subsequent configuration calls. The what argument can refer to a specific command queue. Implementations may use a time of 0 to clear.

Parameters

device	a pointer to a device instance
timeNs	time in nanoseconds
what	optional argument

SOAPY_SDR_API char* SoapySDRDevice_setDCOffset	(	SoapySDRDevice *	device,
		const int	direction,
		const size_t	channel,
		const double	offsetI,
		const double	offsetQ
	)

Set the frontend DC offset correction.

Parameters

device	a pointer to a device instance
direction	the channel direction RX or TX
channel	an available channel on the device
offsetI	the relative correction (1.0 max)
offsetQ	the relative correction (1.0 max)

Returns

an error message or NULL for success

SOAPY_SDR_API char* SoapySDRDevice_setDCOffsetMode	(	SoapySDRDevice *	device,
		const int	direction,
		const size_t	channel,
		const bool	automatic
	)

Set the automatic DC offset corrections mode.

Parameters

device	a pointer to a device instance
direction	the channel direction RX or TX
channel	an available channel on the device
automatic	true for automatic offset correction

Returns

an error message or NULL for success

SOAPY_SDR_API char* SoapySDRDevice_setFrequency	(	SoapySDRDevice *	device,
		const int	direction,
		const size_t	channel,
		const double	frequency,
		const SoapySDRKwargs *	args
	)

Set the center frequency of the chain.

• For RX, this specifies the down-conversion frequency.
• For TX, this specifies the up-conversion frequency.

The default implementation of setFrequency() will tune the "RF" component as close as possible to the requested center frequency. Tuning inaccuracies will be compensated for with the "BB" component.

The args can be used to augment the tuning algorithm.

• Use "OFFSET" to specify an "RF" tuning offset, usually with the intention of moving the LO out of the passband. The offset will be compensated for using the "BB" component.
• Use the name of a component for the key and a frequency in Hz as the value (any format) to enforce a specific frequency. The other components will be tuned with compensation to achieve the specified overall frequency.
• Use the name of a component for the key and the value "IGNORE" so that the tuning algorithm will avoid altering the component.
• Vendor specific implementations can also use the same args to augment tuning in other ways such as specifying fractional vs integer N tuning.

Parameters

device	a pointer to a device instance
direction	the channel direction RX or TX
channel	an available channel on the device
frequency	the center frequency in Hz
args	optional tuner arguments

Returns

an error message or NULL for success

SOAPY_SDR_API char* SoapySDRDevice_setFrequencyComponent	(	SoapySDRDevice *	device,
		const int	direction,
		const size_t	channel,
		const char *	name,
		const double	frequency,
		const SoapySDRKwargs *	args
	)

Tune the center frequency of the specified element.

• For RX, this specifies the down-conversion frequency.
• For TX, this specifies the up-conversion frequency.

Recommended names used to represent tunable components:

• "CORR" - freq error correction in PPM
• "RF" - frequency of the RF frontend
• "BB" - frequency of the baseband DSP

Parameters

device	a pointer to a device instance
direction	the channel direction RX or TX
channel	an available channel on the device
name	the name of a tunable element
frequency	the center frequency in Hz
args	optional tuner arguments

Returns

an error message or NULL for success

SOAPY_SDR_API char* SoapySDRDevice_setFrontendMapping	(	SoapySDRDevice *	device,
		const int	direction,
		const char *	mapping
	)

Set the frontend mapping of available DSP units to RF frontends. This mapping controls channel mapping and channel availability.

Parameters

device	a pointer to a device instance
direction	the channel direction RX or TX
mapping	a vendor-specific mapping string

Returns

an error message or NULL for success

SOAPY_SDR_API char* SoapySDRDevice_setGain	(	SoapySDRDevice *	device,
		const int	direction,
		const size_t	channel,
		const double	value
	)

Set the overall amplification in a chain. The gain will be distributed automatically across available element.

Parameters

device	a pointer to a device instance
direction	the channel direction RX or TX
channel	an available channel on the device
name	the name of an amplification element
value	the new amplification value in dB

Returns

an error message or NULL for success

SOAPY_SDR_API char* SoapySDRDevice_setGainElement	(	SoapySDRDevice *	device,
		const int	direction,
		const size_t	channel,
		const char *	name,
		const double	value
	)

Set the value of a amplification element in a chain.

Parameters

device	a pointer to a device instance
direction	the channel direction RX or TX
channel	an available channel on the device
name	the name of an amplification element
value	the new amplification value in dB

Returns

an error message or NULL for success

SOAPY_SDR_API char* SoapySDRDevice_setGainMode	(	SoapySDRDevice *	device,
		const int	direction,
		const size_t	channel,
		const bool	automatic
	)

Set the automatic gain mode on the chain.

Parameters

device	a pointer to a device instance
direction	the channel direction RX or TX
channel	an available channel on the device
automatic	true for automatic gain setting

Returns

an error message or NULL for success

SOAPY_SDR_API void SoapySDRDevice_setHardwareTime	(	SoapySDRDevice *	device,
		const long long	timeNs,
		const char *	what
	)

Write the time to the hardware clock on the device. The what argument can refer to a specific time counter.

Parameters

device	a pointer to a device instance
timeNs	time in nanoseconds
what	optional argument

SOAPY_SDR_API char* SoapySDRDevice_setIQBalance	(	SoapySDRDevice *	device,
		const int	direction,
		const size_t	channel,
		const double	balanceI,
		const double	balanceQ
	)

Set the frontend IQ balance correction.

Parameters

device	a pointer to a device instance
direction	the channel direction RX or TX
channel	an available channel on the device
balanceI	the relative correction (1.0 max)
balanceQ	the relative correction (1.0 max)

Returns

an error message or NULL for success

SOAPY_SDR_API char* SoapySDRDevice_setMasterClockRate	(	SoapySDRDevice *	device,
		const double	rate
	)

Set the master clock rate of the device.

Parameters

device	a pointer to a device instance
rate	the clock rate in Hz

Returns

an error message or NULL for success

SOAPY_SDR_API char* SoapySDRDevice_setSampleRate	(	SoapySDRDevice *	device,
		const int	direction,
		const size_t	channel,
		const double	rate
	)

Set the baseband sample rate of the chain.

Parameters

device	a pointer to a device instance
direction	the channel direction RX or TX
channel	an available channel on the device
rate	the sample rate in samples per second

Returns

an error message or NULL for success

SOAPY_SDR_API char* SoapySDRDevice_setTimeSource	(	SoapySDRDevice *	device,
		const char *	source
	)

Set the time source on the device

Parameters

device	a pointer to a device instance
source	the name of a time source

Returns

an error message or NULL for success

SOAPY_SDR_API char* SoapySDRDevice_setupStream	(	SoapySDRDevice *	device,
		SoapySDRStream **	stream,
		const int	direction,
		const char *	format,
		const size_t *	channels,
		const size_t	numChans,
		const SoapySDRKwargs *	args
	)

Initialize a stream given a list of channels and stream arguments. All stream API calls should be usable with the new stream object after setupStream() is complete, regardless of the activity state.

Format string markup guidelines:

• C means complex
• F means floating point
• S means signed integer
• U means unsigned integer
• number float/int size in bytes (complex is 2x this size)

Example format strings:

• CF32 complex float32 (8 bytes per element)
• CS16 complex int16 (4 bytes per element)
• CS12 complex int12 (3 bytes per element)
• CS4 complex int4 (1 byte per element)
• S32 int32 (4 bytes per element)
• U8 uint8 (1 byte per element)

Recommended keys to use in the args dictionary:

• "WIRE" - format of the samples between device and host

On failure setup will return NULL and set the error. The error message string must be freed by the caller.

Parameters

	device	a pointer to a device instance
[out]	stream	the opaque pointer to a stream handle
	direction	the channel direction RX or TX
	format	the desired buffer format in read/writeStream()
	channels	a list of channels for empty for automatic
	numChans	the number of elements in the channels array
	args	stream args or empty for defaults
	errorMsg	an error string set on failure

Returns

an error message or NULL for success

SOAPY_SDR_API unsigned SoapySDRDevice_transactSPI	(	SoapySDRDevice *	device,
		const int	addr,
		const unsigned	data,
		const size_t	numBits
	)

Perform a SPI transaction and return the result. Its up to the implementation to set the clock rate, and read edge, and the write edge of the SPI core. SPI slaves without a readback pin will return 0.

If the device contains multiple SPI masters, the address bits can encode which master.

Parameters

device	a pointer to a device instance
addr	an address of an available SPI slave
data	the SPI data, numBits-1 is first out
numBits	the number of bits to clock out

Returns

the readback data, numBits-1 is first in

SOAPY_SDR_API void SoapySDRDevice_unmake

(

SoapySDRDevice *

device

)

Unmake or release a device object handle.

Note

This call is not thread safe. Implementations calling into unmake from multiple threads should protect this call with a mutex.

Parameters

device

a pointer to a device object

SOAPY_SDR_API void SoapySDRDevice_writeGPIO	(	SoapySDRDevice *	device,
		const char *	bank,
		const unsigned	value
	)

Write the value of a GPIO bank.

Parameters

device	a pointer to a device instance
bank	the name of an available bank
value	an integer representing GPIO bits

SOAPY_SDR_API void SoapySDRDevice_writeGPIODir	(	SoapySDRDevice *	device,
		const char *	bank,
		const unsigned	dir
	)

Write the data direction of a GPIO bank. 1 bits represent outputs, 0 bits represent inputs.

Parameters

device	a pointer to a device instance
bank	the name of an available bank
dir	an integer representing data direction bits

SOAPY_SDR_API void SoapySDRDevice_writeGPIODirMasked	(	SoapySDRDevice *	device,
		const char *	bank,
		const unsigned	dir,
		const unsigned	mask
	)

Write the data direction of a GPIO bank with modification mask. 1 bits represent outputs, 0 bits represent inputs.

Parameters

device	a pointer to a device instance
bank	the name of an available bank
dir	an integer representing data direction bits
mask	a modification mask where 1 = modify

SOAPY_SDR_API void SoapySDRDevice_writeGPIOMasked	(	SoapySDRDevice *	device,
		const char *	bank,
		const unsigned	value,
		const unsigned	mask
	)

Write the value of a GPIO bank with modification mask.

Parameters

device	a pointer to a device instance
bank	the name of an available bank
value	an integer representing GPIO bits
mask	a modification mask where 1 = modify

SOAPY_SDR_API void SoapySDRDevice_writeI2C	(	SoapySDRDevice *	device,
		const int	addr,
		const char *	data,
		const size_t	numBytes
	)

Write to an available I2C slave. If the device contains multiple I2C masters, the address bits can encode which master.

Parameters

device	a pointer to a device instance
addr	the address of the slave
data	an array of bytes write out
numBytes	the number of bytes to write

SOAPY_SDR_API void SoapySDRDevice_writeRegister	(	SoapySDRDevice *	device,
		const unsigned	addr,
		const unsigned	value
	)

Write a register on the device. This can represent a register on a soft CPU, FPGA, IC; the interpretation is up the implementation to decide.

Parameters

device	a pointer to a device instance
addr	the register address
value	the register value

SOAPY_SDR_API void SoapySDRDevice_writeSetting	(	SoapySDRDevice *	device,
		const char *	key,
		const char *	value
	)

Write an arbitrary setting on the device. The interpretation is up the implementation.

Parameters

device	a pointer to a device instance
key	the setting identifier
value	the setting value

SOAPY_SDR_API int SoapySDRDevice_writeStream	(	SoapySDRDevice *	device,
		SoapySDRStream *	stream,
		const void *const *	buffs,
		const size_t	numElems,
		int *	flags,
		const long long	timeNs,
		const long	timeoutUs
	)

Write elements to a stream for transmission. This is a multi-channel call, and buffs should be an array of void *, where each pointer will be filled with data for a different channel.

Client code compatibility: Client code relies on writeStream() for proper back-pressure. The writeStream() implementation must enforce the timeout such that the call blocks until space becomes available or timeout expiration.

Parameters

	device	a pointer to a device instance
	stream	the opaque pointer to a stream handle
	buffs	an array of void* buffers num chans in size
	numElems	the number of elements in each buffer
[in,out]	flags	optional input flags and output flags
	timeNs	the buffer's timestamp in nanoseconds
	timeoutUs	the timeout in microseconds

Returns

the number of elements written per buffer or error

SOAPY_SDR_API void SoapySDRDevice_writeUART	(	SoapySDRDevice *	device,
		const char *	which,
		const char *	data
	)

Write data to a UART device. Its up to the implementation to set the baud rate, carriage return settings, flushing on newline.

Parameters

device	a pointer to a device instance
which	the name of an available UART
data	a null terminated array of bytes