static q15_t my_sin_q15( q31_t x)
{
	/* Calculate the nearest index */
	int32_t index = (uint32_t)x >> FAST_MATH_Q31_SHIFT;

	/* Calculation of fractional value */
	q15_t fract = (x - (index << FAST_MATH_Q31_SHIFT)) >> 7;

	/* Read two nearest values of input value from the sin table */
	q15_t a = my_sinTable_q15[index];
	q15_t b = my_sinTable_q15[index + 1];

	/* Linear interpolation process */
	q31_t sin = (q31_t)((0x8000 - fract) * a) + ((q31_t)fract * b);

	return sin >> 15;
}