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Merge pull request #6 from adafruit/reenable-speaker-set-volume
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Reenable speaker & set volume
This commit is contained in:
Limor "Ladyada" Fried 2025-03-28 15:03:07 -04:00 committed by GitHub
commit 1b8203677f
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GPG key ID: B5690EEEBB952194
1 changed files with 18 additions and 5 deletions
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21
src/main.c
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@ -65,6 +65,8 @@
uint8_t *audio_base;
static void audio_setup();
static bool audio_poll();
static void set_mute_state(bool new_state);
static absolute_time_t automute_time;
#endif
////////////////////////////////////////////////////////////////////////////////
@ -153,6 +155,12 @@ static void poll_umac()
int64_t p_1hz = absolute_time_diff_us(last_1hz, now);
int64_t p_vsync = absolute_time_diff_us(last_vsync, now);
bool pending_vsync = p_vsync > 16667;
#if ENABLE_AUDIO
if (automute_time < now) {
automute_time = at_the_end_of_time;
set_mute_state(false);
}
#endif
#if ENABLE_AUDIO
pending_vsync |= audio_poll();
#endif
@ -565,7 +573,6 @@ void modifyRegister(uint8_t reg, uint8_t mask, uint8_t value) {
}
void setPage(uint8_t page) {
printf("Set page %d\n", page);
writeRegister(0x00, page);
}
@ -659,10 +666,10 @@ static void setup_i2s_dac() {
modifyRegister(0x29, 0x78, 0x00); // HP Right Gain, 0 db
// Speaker Amp
modifyRegister(0x20, 0x80, 0x00); // Amp enabled (0x80) disable with (0x00)
modifyRegister(0x2A, 0x04, 0x00); // Not muted (0x04) mute with (0x00)
modifyRegister(0x20, 0x80, 0x80); // Amp enabled (0x80) disable with (0x00)
modifyRegister(0x2A, 0x04, 0x04); // Not muted (0x04) mute with (0x00)
modifyRegister(0x2A, 0x18, 0x08); // 0 dB gain
writeRegister(0x26, 0x0 | 60); // amp gain, -26 dB
writeRegister(0x26, 40); // amp gain, -20.1 dB
// Return to page 0
setPage(0);
@ -676,6 +683,10 @@ static int volscale;
int16_t audio[SAMPLES_PER_BUFFER];
void umac_audio_trap() {
set_mute_state(volscale != 0);
if(volscale) {
automute_time = make_timeout_time_ms(500);
}
int32_t offset = 128;
uint16_t *audiodata = (uint16_t*)audio_base;
int scale = volscale;
@ -744,9 +755,11 @@ static void set_mute_state(bool new_state) {
if(mute_state) {
modifyRegister(0x28, 0x04, 0x04); // HP Left not muted
modifyRegister(0x29, 0x04, 0x04); // HP Right not muted
modifyRegister(0x2A, 0x04, 0x04); // Speaker not muted
} else {
modifyRegister(0x28, 0x04, 0x0); // HP Left muted
modifyRegister(0x29, 0x04, 0x0); // HP Right muted
modifyRegister(0x2A, 0x04, 0x0); // Speaker muted
}
}