HarmonyOS鸿蒙Next Hi3861：自家开发版上实现蜂蜜音小调

HarmonyOS鸿蒙Next Hi3861：自家开发版上实现蜂蜜音小调 成功的在hi3861中的红绿灯板块上实现了两只老虎调调的播放。

代码如下：

/*
 * Copyright (c) 2020, HiHope Community.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this
 *    list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 *
 * 3. Neither the name of the copyright holder nor the names of its
 *    contributors may be used to endorse or promote products derived from
 *    this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <stdio.h>
#include <unistd.h>

#include "ohos_init.h"
#include "cmsis_os2.h"
#include "wifiiot_gpio.h"
#include "wifiiot_gpio_ex.h"
#include "wifiiot_watchdog.h"
#include "wifiiot_pwm.h"

#include "hi_pwm.h"

static volatile int g_buttonPressed = 0;

static const uint16_t g_tuneFreqs[] = {
    0, // 40M Hz 对应的分频系数：
    38223, // 1046.5
    34052, // 1174.7
    30338, // 1318.5
    28635, // 1396.9
    25511, // 1568
    22728, // 1760
    20249, // 1975.5
    51021 // 5_ 783.99 // 第一个八度的 5
};

// 曲谱音符
static const uint8_t g_scoreNotes[] = {
    // 《两只老虎》简谱：http://www.jianpu.cn/pu/33/33945.htm
    1, 2, 3, 1, 1, 2, 3, 1, 3, 4, 5, 3, 4, 5,
    5, 6, 5, 4, 3, 1, 5, 6, 5, 4, 3, 1, 1, 8, 1, 
    1, 8, 1, // 最后两个 5 应该是低八度的，链接图片中的曲谱不对，声音到最后听起来不太对劲
};

// 曲谱时值
static const uint8_t g_scoreDurations[] = {
    4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 8,
    3, 1, 3, 1, 4, 4, 3, 1, 3, 1, 4, 4, 4, 4, 8,
    4, 4, 8, 4, 4, 8,
};

static void *jltfcloudcom(const char *arg)
{
    (void)arg;

    printf("jltfcloudcom start!\r\n");

    hi_pwm_set_clock(PWM_CLK_XTAL); // 设置时钟源为晶体时钟（40MHz，默认时钟源160MHz）

    for (size_t i = 0; i < sizeof(g_scoreNotes)/sizeof(g_scoreNotes[0]); i++) {
        uint32_t tune = g_scoreNotes[i]; // 音符
        uint16_t freqDivisor = g_tuneFreqs[tune];
        uint32_t tuneInterval = g_scoreDurations[i] * (125*1000);

        printf("%d %d %d %d\r\n", tune, (40*1000*1000)/freqDivisor, freqDivisor, tuneInterval);

        PwmStart(WIFI_IOT_PWM_PORT_PWM0, freqDivisor/2, freqDivisor);
        usleep(tuneInterval);
        PwmStop(WIFI_IOT_PWM_PORT_PWM0);
    }

    return NULL;
}

static void jltfcloudcn(void)
{
    osThreadAttr_t attr;

    GpioInit();

    // 蜂鸣器引脚 设置为 PWM 功能
    IoSetFunc(WIFI_IOT_IO_NAME_GPIO_9, WIFI_IOT_IO_FUNC_GPIO_9_PWM0_OUT);
    PwmInit(WIFI_IOT_PWM_PORT_PWM0);

    WatchDogDisable();

    attr.name = "jltfcloudcom";
    attr.attr_bits = 0U;
    attr.cb_mem = NULL;
    attr.cb_size = 0U;
    attr.stack_mem = NULL;
    attr.stack_size = 1024;
    attr.priority = osPriorityNormal;

    if (osThreadNew((osThreadFunc_t)jltfcloudcom, NULL, &attr) == NULL) {
        printf("[LedExample] Falied to create jltfcloudcom!\n");
    }
}

SYS_RUN(jltfcloudcn);

本部分参考和引用了一些公开代码。