[RVB2601 Creative Application Development] Online MP3 Music Playback
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Open the CDK integrated development environment in Windows, search for the online music player example webplayer in HOME, open it and compile and burn it to the development board
Note: Use the microUSB interface of JTAG (with built-in virtual serial port) for downloading, and the UART interface for serial communication!
Open the UART serial port in the serial port assistant and connect to wifi through the command line.
Note: There must be a carriage return after the command line. Some serial port assistants have automatic carriage return characters, while some do not. If there is no carriage return character, the command will be invalid.
ifconfig ap wifiname password
If the connection is successful, the following information will be printed:
[2022-03-18 16:49:57.49.187]: ifconfig ap TB tobetobe
apconfig ssid:TB, psw:tobetobe
[3647
.# 6
3# 0
]# <
I# >
n# e
t# mgr start wifi
[3648.380]<D>w800_api WIFI SOFT RESET OK
[3648.510]<I>netmgr_wifi ssid{TB}, psk{tobetobe}
[3651.720]<I>netmgr IP: 192.168.11.229
[3651.720]<D>APP net got ip
If you don't want to bother connecting to WiFi through the command line every time, you can uncomment the WiFi connection function in the program.
In the init.c file
netmgr_config_wifi(app_netmgr_hdl, "TB", 2, "tobetobe", strlen("tobetobe"));
This code can automatically connect to the configured WiFi after burning the program. The WiFi name and password need to be set in advance.
The character length must also be correct.
Send now
player play http://96.ierge.cn/15/235/471729.mp3
The music will play. Nowadays, there are fewer and fewer online MP3 playback websites that can directly play downloaded music. It is hard to find them. You can try to change the number after the URL to change the music.
I have been looking for this website for a long time, so I'll just use it for now.
After testing, I found that the default playback volume was very loud, which caused a lot of music to have a high pitch and then produce a wave phenomenon. With the reminder of my group friends, I changed the gain size to solve this problem.
If you lower the gain, there will be no popping sound. The default is 160, I changed it to 128
player_t *get_player_demo()
{
if (!g_player) {
ply_conf_t ply_cnf;
player_conf_init(&ply_cnf); // 初始化播放器默认配置
ply_cnf.vol_en = 1; // 使能数字音量功能
ply_cnf.vol_index = 160; // 0~255
ply_cnf.event_cb = _player_event; // 播放事件回调函数
ply_cnf.period_num = 12; // 底层音频输出缓冲周期，用于控制音频输出缓冲大小
ply_cnf.cache_size = 32 * 1024; // 网络时的播放缓冲大小
g_player = player_new(&ply_cnf); // 创建播放器
}
return g_player;
}
Finally, let’s take a look at the playback effect. Adding an empty express paper box as the sound cavity will achieve better results.
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