ghnotgood commented on PR #3477:
URL: https://github.com/apache/nuttx-apps/pull/3477#issuecomment-4449455519
@raiden00pl I have reverted git clone to the Makefile. The rtttl-c is
published under both, MIT or Apache-2.0 licenses.
@cederom I have put very simple example in Kconfig already. I have put an
example with printing frequencies and durations in the PR summary. The problem
with an example that makes actual sound is that the board I am working on does
not have a simple way to make a sound (like PWM) so I am not able to test it.
When considering `audio_rttl` example, I believe it could be rewritten with
`rtttl-c` like:
```
/****************************************************************************
* apps/examples/audio_rtttl-c/audio_rtttl-c.cxx
*
* SPDX-License-Identifier: Apache-2.0
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <stdio.h>
#include <arch/board/board.h>
#include <arch/chip/audio.h>
#include <audioutils/rtttl.h>
#include "audio_rtttl-c.h"
/****************************************************************************
* Private Functions
****************************************************************************/
void play_sound(struct rtttl_tone sound)
{
board_audio_tone_generator(1, -40, soud.frequency_100hz / 100);
usleep(sound.duration_us * 1000L);
}
/****************************************************************************
* Public Functions
****************************************************************************/
extern "C" int main(int argc, FAR char *argv[])
{
/* Set I/O parameters for power on. */
if (!board_audio_power_control(true))
{
printf("Error: board_audio_power_control() failure.\n");
return 1;
}
printf("Start Audio RTTL player\n");
rtttl_play(g_song, play_sound);
/* Sound off. */
if (!board_audio_tone_generator(0, 0, 0))
{
printf("Error: board_audio_tone_generator() failure.\n");
return 1;
}
/* Set I/O parameters for power off. */
if (!board_audio_power_control(false))
{
printf("Error: board_audio_power_control() failure.\n");
return 1;
}
printf("Done.\n");
return 0;
}
```
But please note that I am not able to test it, because I do not have cxd56xx.
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