Classes
class	gri_goertzel
	Implements Goertzel single-bin DFT calculation. More...
class	gr_feval_dd
	base class for evaluating a function: double -> doubleThis class is designed to be subclassed in Python or C++ and is callable from both places. It uses SWIG's "director" feature to implement the magic. It's slow. Don't use it in a performance critical path. More...
class	gr_feval_cc
	base class for evaluating a function: complex -> complexThis class is designed to be subclassed in Python or C++ and is callable from both places. It uses SWIG's "director" feature to implement the magic. It's slow. Don't use it in a performance critical path. More...
class	gr_feval_ll
	base class for evaluating a function: long -> longThis class is designed to be subclassed in Python or C++ and is callable from both places. It uses SWIG's "director" feature to implement the magic. It's slow. Don't use it in a performance critical path. More...
class	gr_feval
	base class for evaluating a function: void -> voidThis class is designed to be subclassed in Python or C++ and is callable from both places. It uses SWIG's "director" feature to implement the magic. It's slow. Don't use it in a performance critical path. More...
class	gr_fxpt
	fixed point sine and cosine and friends.fixed pt radians More...
class	gr_fxpt_nco
	Numerically Controlled Oscillator (NCO) More...
class	gr_fxpt_vco
	Voltage Controlled Oscillator (VCO) More...
class	gr_nco< o_type, i_type >
	base class template for Numerically Controlled Oscillator (NCO) More...
class	gr_prefs
	Base class for representing user preferences a la windows INI files.The real implementation is in Python, and is accessable from C++ via the magic of SWIG directors. More...
class	gr_test
	Test class for testing runtime system (setting up buffers and such.)This block does not do any usefull actual data processing. It just exposes setting all standard block parameters using the contructor or public methods. More...
class	gr_vco< o_type, i_type >
	base class template for Voltage Controlled Oscillator (VCO) More...
class	gri_fft_complex
	FFT: complex in, complex out. More...
class	gri_fft_real_fwd
	FFT: real in, complex out. More...
class	gri_fft_real_rev
	FFT: complex in, float out. More...
class	gri_glfsr
	Galois Linear Feedback Shift Register using specified polynomial maskGenerates a maximal length pseudo-random sequence of length 2^degree-1. More...
class	gri_lfsr
	Fibonacci Linear Feedback Shift Register using specified polynomial maskGenerates a maximal length pseudo-random sequence of length 2^degree-1. More...
class	gri_lfsr_15_1_0
	Linear Feedback Shift Register using primitive polynomial x^15 + x + 1Generates a maximal length pseudo-random sequence of length 2^15 - 1 bits. More...
class	gri_lfsr_32k
	generate pseudo-random sequence of length 32768 bits.This is based on gri_lfsr_15_1_0 with an extra 0 added at the end of the sequence. More...
class	gr_message
	Message class. More...
class	gr_msg_queue
	thread-safe message queue More...
Functions
unsigned int	gr_update_crc32 (unsigned int crc, const unsigned char *buf, size_t len)
	update running CRC-32Update a running CRC with the bytes buf[0..len-1] The CRC should be initialized to all 1's, and the transmitted value is the 1's complement of the final running CRC. The resulting CRC should be transmitted in big endian order.
float	gr_fast_atan2f (float y, float x)
	Fast arc tangent using table lookup and linear interpolation.
gr_rt_status_t	gr_enable_realtime_scheduling ()
	If possible, enable high-priority "real time" scheduling.
gr_timer_sptr	gr_make_timer (gr_timer_hook, void *)
	create a timeout.
rt_status_t	gruel::enable_realtime_scheduling (rt_sched_param=rt_sched_param())
	If possible, enable "realtime" scheduling.In general, this means that the code will be scheduled before any non-realtime (normal) processes. Note that if your code contains an non-blocking infinite loop and you enable realtime scheduling, it's possible to hang the system.

Function Documentation

rt_status_t gruel::enable_realtime_scheduling ( rt_sched_param = rt_sched_param() )

If possible, enable "realtime" scheduling.In general, this means that the code will be scheduled before any non-realtime (normal) processes. Note that if your code contains an non-blocking infinite loop and you enable realtime scheduling, it's possible to hang the system.

gr_rt_status_t gr_enable_realtime_scheduling ( )

If possible, enable high-priority "real time" scheduling.

float gr_fast_atan2f	(	float	y,
		float	x
	)

Fast arc tangent using table lookup and linear interpolation.

Parameters:

y	component of input vector
x	component of input vector

Returns:: float angle angle of vector (x, y) in radians

This function calculates the angle of the vector (x,y) based on a table lookup and linear interpolation. The table uses a 256 point table covering -45 to +45 degrees and uses symetry to determine the final angle value in the range of -180 to 180 degrees. Note that this function uses the small angle approximation for values close to zero. This routine calculates the arc tangent with an average error of +/- 0.045 degrees.

Referenced by gr_fast_atan2f().

gr_timer_sptr gr_make_timer	(	gr_timer_hook	,
		void *
	)

create a timeout.

gr_timer_hook is called when timer fires.

unsigned int gr_update_crc32	(	unsigned int	crc,
		const unsigned char *	buf,
		size_t	len
	)

update running CRC-32Update a running CRC with the bytes buf[0..len-1] The CRC should be initialized to all 1's, and the transmitted value is the 1's complement of the final running CRC. The resulting CRC should be transmitted in big endian order.

Classes

Functions

Function Documentation