conversion.c File Reference

Conversion helper functions. More...

#include <libsigrok/libsigrok.h>
#include "libsigrok-internal.h"

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Macros
#define	LOG_PREFIX   "conv"

Functions
int	sr_a2l_threshold (const struct sr_datafeed_analog *analog, float threshold, uint8_t *output, uint64_t count)
	Convert analog values to logic values by using a fixed threshold. More...
int	sr_a2l_schmitt_trigger (const struct sr_datafeed_analog *analog, float lo_thr, float hi_thr, uint8_t *state, uint8_t *output, uint64_t count)
	Convert analog values to logic values by using a Schmitt-trigger algorithm. More...

Detailed Description

Conversion helper functions.

Definition in file conversion.c.

Macro Definition Documentation

#define LOG_PREFIX   "conv"

Definition at line 29 of file conversion.c.

Function Documentation

int sr_a2l_schmitt_trigger	(	const struct sr_datafeed_analog *	analog,
		float	lo_thr,
		float	hi_thr,
		uint8_t *	state,
		uint8_t *	output,
		uint64_t	count
	)

Convert analog values to logic values by using a Schmitt-trigger algorithm.

Parameters

analog	The analog input values.
lo_thr	The low threshold - result becomes 0 below it.
lo_thr	The high threshold - result becomes 1 above it.
state	The internal converter state. Must contain the state of logic sample n-1, will contain the state of logic sample n+count upon exit.
output	The converted output values; either 0 or 1. Must provide space for count bytes.
count	The number of samples to process.

Returns

SR_OK on success or SR_ERR on failure.

Definition at line 79 of file conversion.c.

References sr_datafeed_analog::data, sr_datafeed_analog::encoding, sr_analog_encoding::is_float, sr_analog_to_float(), SR_ERR, and SR_OK.

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int sr_a2l_threshold	(	const struct sr_datafeed_analog *	analog,
		float	threshold,
		uint8_t *	output,
		uint64_t	count
	)

Convert analog values to logic values by using a fixed threshold.

Parameters

[in]	analog	The analog input values.
[in]	threshold	The threshold to use.
[out]	output	The converted output values; either 0 or 1. Must provide space for count bytes.
[in]	count	The number of samples to process.

Returns

SR_OK on success or SR_ERR on failure.

Definition at line 42 of file conversion.c.

References sr_datafeed_analog::data, sr_datafeed_analog::encoding, sr_analog_encoding::is_float, sr_analog_to_float(), SR_ERR, and SR_OK.

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