Copy #define BUFFER_SIZE 1024
#define SAMPLE_RATE 44100
#define DEFAULT_FREQ 440
static int16_t audio_buffer[BUFFER_SIZE];
static bool audio_playing = false;
static uint32_t current_freq = DEFAULT_FREQ;
static int16_t volume = 16000;
static void generate_tone(void)
{
aic_scope_generate_sine(audio_buffer, BUFFER_SIZE,
current_freq, SAMPLE_RATE, volume);
}
static void play_btn_cb(lv_event_t *e)
{
(void)e;
if (!audio_playing) {
generate_tone();
aic_audio_init(SAMPLE_RATE);
aic_audio_play(audio_buffer, BUFFER_SIZE);
audio_playing = true;
lv_label_set_text(btn_label, "Stop");
} else {
aic_audio_stop();
audio_playing = false;
lv_label_set_text(btn_label, "Play");
}
}
static void freq_slider_cb(lv_event_t *e)
{
lv_obj_t *slider = lv_event_get_target(e);
current_freq = lv_slider_get_value(slider);
lv_label_set_text_fmt(freq_label, "%u Hz", (unsigned int)current_freq);
if (audio_playing) {
generate_tone();
aic_audio_play(audio_buffer, BUFFER_SIZE);
}
}
void week5_ex3_audio_waveform(void)
{
/* Chart for visualization */
/* Play/Stop Button */
/* Frequency Slider (100-1000 Hz) */
/* Volume Slider */
} 
