jump/schmidt_trigger.c

#include "schmidt_trigger.h"

int schmidt_init(struct schmidt *schmidt, float low, float high)
{
	if (low > high)
		return -1;

	schmidt->high = high;
	schmidt->low = low;
	schmidt->value = 0;

	return 0;
}

int schmidt_trig(struct schmidt *schmidt, float level)
{
	if ((schmidt->value == 1 && level <= schmidt->low) ||
	    (schmidt->value == 0 && level >= schmidt->high)) {
		schmidt->value ^= 1;
		return 1;
	}

	return 0;
}

int schmidt_get(struct schmidt *schmidt)
{
	return schmidt->value;
}

/* vim: set ts=8 sw=8 sts=8 noet: */