void FloatArray::rectify(FloatArray& destination){ //this is actually "copy data with rectifify"
/// @note When built for ARM Cortex-M processor series, this method uses the optimized <a href="http://www.keil.com/pack/doc/CMSIS/General/html/index.html">CMSIS library</a>
#ifdef ARM_CORTEX
arm_abs_f32(data, destination.getData(), size);
#else
int minSize= min(size,destination.getSize()); //TODO: shall we take this out and allow it to segfault?
for(int n=0; n<minSize; n++){
destination[n] = fabs(data[n]);
}
#endif
}
int32_t main(void)
{
uint32_t i;
arm_status status;
uint32_t index;
float32_t minValue;
/* Initialize the LMSNorm data structure */
arm_lms_norm_init_f32(&lmsNorm_instance, NUMTAPS, lmsNormCoeff_f32, lmsStateF32, MU, BLOCKSIZE);
/* Initialize the FIR data structure */
arm_fir_init_f32(&LPF_instance, NUMTAPS, (float32_t *)FIRCoeff_f32, firStateF32, BLOCKSIZE);
/* ----------------------------------------------------------------------
* Loop over the frames of data and execute each of the processing
* functions in the system.
* ------------------------------------------------------------------- */
for(i=0; i < NUMFRAMES; i++)
{
/* Read the input data - uniformly distributed random noise - into wire1 */
arm_copy_f32(testInput_f32 + (i * BLOCKSIZE), wire1, BLOCKSIZE);
/* Execute the FIR processing function. Input wire1 and output wire2 */
arm_fir_f32(&LPF_instance, wire1, wire2, BLOCKSIZE);
/* Execute the LMS Norm processing function*/
arm_lms_norm_f32(&lmsNorm_instance, /* LMSNorm instance */
wire1, /* Input signal */
wire2, /* Reference Signal */
wire3, /* Converged Signal */
err_signal, /* Error Signal, this will become small as the signal converges */
BLOCKSIZE); /* BlockSize */
/* apply overall gain */
arm_scale_f32(wire3, 5, wire3, BLOCKSIZE); /* in-place buffer */
}
status = ARM_MATH_SUCCESS;
/* -------------------------------------------------------------------------------
* Test whether the error signal has reached towards 0.
* ----------------------------------------------------------------------------- */
arm_abs_f32(err_signal, err_signal, BLOCKSIZE);
arm_min_f32(err_signal, BLOCKSIZE, &minValue, &index);
if (minValue > DELTA_ERROR)
{
status = ARM_MATH_TEST_FAILURE;
}
/* ----------------------------------------------------------------------
* Test whether the filter coefficients have converged.
* ------------------------------------------------------------------- */
arm_sub_f32((float32_t *)FIRCoeff_f32, lmsNormCoeff_f32, lmsNormCoeff_f32, NUMTAPS);
arm_abs_f32(lmsNormCoeff_f32, lmsNormCoeff_f32, NUMTAPS);
arm_min_f32(lmsNormCoeff_f32, NUMTAPS, &minValue, &index);
if (minValue > DELTA_COEFF)
{
status = ARM_MATH_TEST_FAILURE;
}
/* ----------------------------------------------------------------------
* Loop here if the signals did not pass the convergence check.
* This denotes a test failure
* ------------------------------------------------------------------- */
if( status != ARM_MATH_SUCCESS)
{
while(1);
}
}
