mirror of https://github.com/ARMmbed/mbed-os.git
57 lines
1.9 KiB
C++
57 lines
1.9 KiB
C++
/* mbed Microcontroller Library
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* Copyright (c) 2006-2012 ARM Limited
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include "Sine_f32.h"
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#include "math_helper.h"
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#define RAD_2PI (2. * PI)
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namespace dsp {
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Sine_f32::Sine_f32(uint32_t frequency, uint32_t sample_rate, float32_t amplitude, float32_t phase, uint32_t block_size) {
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_dx = RAD_2PI * ((float32_t)frequency / (float32_t)sample_rate);
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_amplitude = amplitude;
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_x = phase;
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_block_size = block_size;
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}
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void Sine_f32::process(float32_t *sgn_in, float32_t *sgn_out) {
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for (uint32_t i=0; i<_block_size; i++) {
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*sgn_out = *sgn_in + (_amplitude * arm_sin_f32(_x));
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sgn_in++; sgn_out++;
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_x += _dx;
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}
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}
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void Sine_f32::generate(float32_t *sgn) {
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for (uint32_t i=0; i<_block_size; i++) {
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*sgn = (_amplitude * arm_sin_f32(_x));
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sgn++;
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_x += _dx;
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}
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}
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void Sine_f32::reset(void) {
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_x = 0.0f;
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}
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}
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