鸿蒙Hi3861：自家开发版上实现蜂蜜音小调 原创

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.
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* modification, are permitted provided that the following conditions are met:
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*    this software without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* 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, 8,  4, 4, 8,
    3, 1, 3, 1, 4, 4,  3, 1, 3, 1, 4, 4,  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; // 音符
        uint16_t freqDivisor = g_tuneFreqs[tune];
        uint32_t tuneInterval = g_scoreDurations * (125*1000); // 音符时间
        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许思维老师的一些公开代码。