从内部Flash读取WAV音频播放¶
软件包安装¶
本次实验实现音乐播放功能,单击按键进行音乐切换。需要安装的软件包有 wavplayer/optparse/multibutton 三个软件包。其中 optparse 在 wavplayer 勾选后,自动选择。
进入软件包选择界面.
也可以通过`更多配置`查看所有软件包来选择个软件包:
wavplayer 软件包安装¶
multibutton 软件包安装¶
保存,下载软件包到工程¶
软件包选择完成后,点击 保存 按钮,将配置保存并应用到工程中。保存的时候会弹出进度提示框,提示保存进度,会自动下载到 package 目录下。
demo编写¶
安装完 wavplayer/optparse/multibutton 三个软件包之后,就完成此次试验所需要的依赖的软件包。接下来开始编写demo。
下载 romfs.c(本文件包含了两个音频文件用于demo播放) 放置到 applications 下
下载 mnt.c 替换 applications 下原有的文件,从而挂载 romfs,主要代码在下方
#include <dfs_fs.h>
#include "dfs_romfs.h"
int ab32_romfs_mount(void)
{
if (dfs_mount(RT_NULL, "/", "rom", 0, &(romfs_root)) == 0)
{
rt_kprintf("ROM file system initializated!\n");
}
else
{
rt_kprintf("ROM file system initializate failed!\n");
}
return 0;
}
INIT_ENV_EXPORT(ab32_romfs_mount);
然后在 applications 下新建 event_async.c 文件,复制以下代码
#include <rtthread.h>
#include <rtdevice.h>
#include "board.h"
#include <multi_button.h>
#include "wavplayer.h"
#define BUTTON_PIN_0 rt_pin_get("PF.0")
#define BUTTON_PIN_1 rt_pin_get("PF.1")
#define NUM_OF_SONGS (2u)
static struct button btn_0;
static struct button btn_1;
static uint32_t cnt_0 = 0;
static uint32_t cnt_1 = 0;
static char *table[2] =
{
"wav_1.wav",
"wav_2.wav",
};
void saia_channels_set(uint8_t channels);
void saia_volume_set(rt_uint8_t volume);
uint8_t saia_volume_get(void);
static uint8_t button_read_pin_0(void)
{
return rt_pin_read(BUTTON_PIN_0);
}
static uint8_t button_read_pin_1(void)
{
return rt_pin_read(BUTTON_PIN_1);
}
static void button_0_callback(void *btn)
{
uint32_t btn_event_val;
btn_event_val = get_button_event((struct button *)btn);
switch(btn_event_val)
{
case SINGLE_CLICK:
if (cnt_0 == 1) {
saia_volume_set(30);
}else if (cnt_0 == 2) {
saia_volume_set(50);
}else {
saia_volume_set(100);
cnt_0 = 0;
}
cnt_0++;
rt_kprintf("vol=%d\n", saia_volume_get());
rt_kprintf("button 0 single click\n");
break;
case DOUBLE_CLICK:
if (cnt_0 == 1) {
saia_channels_set(1);
}else {
saia_channels_set(2);
cnt_0 = 0;
}
cnt_0++;
rt_kprintf("button 0 double click\n");
break;
case LONG_PRESS_START:
rt_kprintf("button 0 long press start\n");
break;
case LONG_PRESS_HOLD:
rt_kprintf("button 0 long press hold\n");
break;
}
}
static void button_1_callback(void *btn)
{
uint32_t btn_event_val;
btn_event_val = get_button_event((struct button *)btn);
switch(btn_event_val)
{
case SINGLE_CLICK:
wavplayer_play(table[(cnt_1++) % NUM_OF_SONGS]);
rt_kprintf("button 1 single click\n");
break;
case DOUBLE_CLICK:
rt_kprintf("button 1 double click\n");
break;
case LONG_PRESS_START:
rt_kprintf("button 1 long press start\n");
break;
case LONG_PRESS_HOLD:
rt_kprintf("button 1 long press hold\n");
break;
}
}
static void btn_thread_entry(void* p)
{
while(1)
{
/* 5ms */
rt_thread_delay(RT_TICK_PER_SECOND/200);
button_ticks();
}
}
static int multi_button_test(void)
{
rt_thread_t thread = RT_NULL;
/* Create background ticks thread */
thread = rt_thread_create("btn", btn_thread_entry, RT_NULL, 1024, 10, 10);
if(thread == RT_NULL)
{
return RT_ERROR;
}
rt_thread_startup(thread);
/* low level drive */
rt_pin_mode (BUTTON_PIN_0, PIN_MODE_INPUT_PULLUP);
button_init (&btn_0, button_read_pin_0, PIN_LOW);
button_attach(&btn_0, SINGLE_CLICK, button_0_callback);
button_attach(&btn_0, DOUBLE_CLICK, button_0_callback);
button_attach(&btn_0, LONG_PRESS_START, button_0_callback);
button_attach(&btn_0, LONG_PRESS_HOLD, button_0_callback);
button_start (&btn_0);
rt_pin_mode (BUTTON_PIN_1, PIN_MODE_INPUT_PULLUP);
button_init (&btn_1, button_read_pin_1, PIN_LOW);
button_attach(&btn_1, SINGLE_CLICK, button_1_callback);
button_attach(&btn_1, DOUBLE_CLICK, button_1_callback);
button_attach(&btn_1, LONG_PRESS_START, button_1_callback);
button_attach(&btn_1, LONG_PRESS_HOLD, button_1_callback);
button_start (&btn_1);
return RT_EOK;
}
INIT_APP_EXPORT(multi_button_test);
程序下载¶
demo编写完成后,单击编译按钮开始编译,编译成功后下载编译后生成的 .dcf 固件到芯片;
双击打开 Downloader v2.2.0。
下载成功后会在串口界面打印"Hello World", 并会有led灯闪烁
此时按下按键S2,会播放第一首音乐,再次按下,播放下一首音乐,依次循环。