diff options
Diffstat (limited to 'util/audio_generate_dac_lut.py')
-rwxr-xr-x | util/audio_generate_dac_lut.py | 67 |
1 files changed, 0 insertions, 67 deletions
diff --git a/util/audio_generate_dac_lut.py b/util/audio_generate_dac_lut.py deleted file mode 100755 index c31ba3d7ee..0000000000 --- a/util/audio_generate_dac_lut.py +++ /dev/null @@ -1,67 +0,0 @@ -#!/usr/bin/env python3 -# -# Copyright 2020 JohSchneider -# -# This program is free software: you can redistribute it and/or modify -# it under the terms of the GNU General Public License as published by -# the Free Software Foundation, either version 2 of the License, or -# (at your option) any later version. -# -# This program is distributed in the hope that it will be useful, -# but WITHOUT ANY WARRANTY; without even the implied warranty of -# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -# GNU General Public License for more details. -# -# You should have received a copy of the GNU General Public License -# along with this program. If not, see <http://www.gnu.org/licenses/>. -# - -AUDIO_DAC_BUFFER_SIZE=256 -AUDIO_DAC_SAMPLE_MAX=4095 - -def plot(values): - for v in values: - print('0'* int(v * 80/AUDIO_DAC_SAMPLE_MAX)) - -def to_lut(values): - for v in values: - print(hex(int(v)), end=", ") - - -from math import sin, tau, pi - -samples=[] - -def sampleSine(): - for s in range(AUDIO_DAC_BUFFER_SIZE): - samples.append((sin((s/AUDIO_DAC_BUFFER_SIZE)*tau - pi/2) + 1 )/2* AUDIO_DAC_SAMPLE_MAX) - -def sampleTriangle(): - for s in range(AUDIO_DAC_BUFFER_SIZE): - if s < AUDIO_DAC_BUFFER_SIZE/2: - samples.append(s/(AUDIO_DAC_BUFFER_SIZE/2) * AUDIO_DAC_SAMPLE_MAX) - else: - samples.append(AUDIO_DAC_SAMPLE_MAX - (s-AUDIO_DAC_BUFFER_SIZE/2)/(AUDIO_DAC_BUFFER_SIZE/2) * AUDIO_DAC_SAMPLE_MAX) - -#compromise between square and triangle wave, -def sampleTrapezoidal(): - for i in range(AUDIO_DAC_BUFFER_SIZE): - a=3 #slope/inclination - if (i < AUDIO_DAC_BUFFER_SIZE/2): - s = a * (i * AUDIO_DAC_SAMPLE_MAX/(AUDIO_DAC_BUFFER_SIZE/2)) + (1-a)*AUDIO_DAC_SAMPLE_MAX/2 - else: - i = i - AUDIO_DAC_BUFFER_SIZE/2 - s = AUDIO_DAC_SAMPLE_MAX - a * (i * AUDIO_DAC_SAMPLE_MAX/(AUDIO_DAC_BUFFER_SIZE/2)) - (1-a)*AUDIO_DAC_SAMPLE_MAX/2 - - if s < 0: - s=0 - if s> AUDIO_DAC_SAMPLE_MAX: - s=AUDIO_DAC_SAMPLE_MAX - samples.append(s) - - -#sampleSine() -sampleTrapezoidal() -#print(samples) -plot(samples) -to_lut(samples) |