Convert 32-bit fixed point value

Functions
void	arm_q31_to_float (const q31_t *pSrc, float32_t *pDst, uint32_t blockSize)
	Converts the elements of the Q31 vector to floating-point vector. More...
void	arm_q31_to_q15 (const q31_t *pSrc, q15_t *pDst, uint32_t blockSize)
	Converts the elements of the Q31 vector to Q15 vector. More...
void	arm_q31_to_q7 (const q31_t *pSrc, q7_t *pDst, uint32_t blockSize)
	Converts the elements of the Q31 vector to Q7 vector. More...

Description

Function Documentation

arm_q31_to_float()

void arm_q31_to_float	(	const q31_t *	pSrc,
		float32_t *	pDst,
		uint32_t	blockSize
	)

Parameters

[in]	pSrc	points to the Q31 input vector
[out]	pDst	points to the floating-point output vector
[in]	blockSize	number of samples in each vector

Returns

none

Details

The equation used for the conversion process is:

    pDst[n] = (float32_t) pSrc[n] / 2147483648;   0 <= n < blockSize.

arm_q31_to_q15()

void arm_q31_to_q15	(	const q31_t *	pSrc,
		q15_t *	pDst,
		uint32_t	blockSize
	)

Parameters

[in]	pSrc	points to the Q31 input vector
[out]	pDst	points to the Q15 output vector
[in]	blockSize	number of samples in each vector

Returns

none

Details

The equation used for the conversion process is:

    pDst[n] = (q15_t) pSrc[n] >> 16;   0 <= n < blockSize.

arm_q31_to_q7()

void arm_q31_to_q7	(	const q31_t *	pSrc,
		q7_t *	pDst,
		uint32_t	blockSize
	)

Parameters

[in]	pSrc	points to the Q31 input vector
[out]	pDst	points to the Q7 output vector
[in]	blockSize	number of samples in each vector

Returns

none

Details

The equation used for the conversion process is:

    pDst[n] = (q7_t) pSrc[n] >> 24;   0 <= n < blockSize.