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AI Thinker: Fix volume levels (#68)

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* AI Thinker: Fix volume levels

* cut range in half again to 46
This commit is contained in:
Alex Yao
2024-03-10 14:42:05 -05:00
committed by GitHub
Unverified
parent 417ec7ff12
commit fd701a1ead
2 changed files with 28 additions and 14 deletions
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35
components/audio_hal/driver/es8388/es8388.c
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@@ -346,6 +346,10 @@ es8388_init (audio_hal_codec_config_t *cfg)
0x80); // set internal ADC and DAC use the same LRCK
// clock, ADC LRCK as internal LRCK
res |= es_write_reg (ES8388_ADDR, ES8388_DACCONTROL23, 0x00); // vroi=0
res |= es_write_reg (ES8388_ADDR, ES8388_DACCONTROL24, 0x1E); // Set L1 R1 L2 R2 volume. 0x00: -30dB, 0x1E: 0dB, 0x21: 3dB
res |= es_write_reg (ES8388_ADDR, ES8388_DACCONTROL25, 0x1E);
res |= es_write_reg (ES8388_ADDR, ES8388_DACCONTROL26, 0x1E);
res |= es_write_reg (ES8388_ADDR, ES8388_DACCONTROL27, 0x1E);
res |= es8388_set_adc_dac_volume (ES_MODULE_DAC, 0, 0); // 0db
int tmp = 0;
if (AUDIO_HAL_DAC_OUTPUT_LINE2 == cfg->dac_output)
@@ -445,7 +449,7 @@ es8388_set_voice_volume (int volume)
volume = 0;
else if (volume > 100)
volume = 100;
/* Audio Settings can be checked here:
/* Audio Settings can be checked here:
* https://dl.radxa.com/rock2/docs/hw/ds/ES8388%20user%20Guide.pdf
*
* ES8388_DACCONTROL4 & ES8388_DACCONTROL5
@@ -456,17 +460,15 @@ es8388_set_voice_volume (int volume)
* 0 = -45dB
* 33 = 4.5dB
*/
int inv_volume = (100 - volume)*1.92;
// restrict range from 0-46 instead of 0-192
int inv_volume = -0.46 * volume + 46;
if (volume == 0) {
// if volume is 0, set to -96dB
inv_volume = 192;
}
res = es_write_reg (ES8388_ADDR, ES8388_DACCONTROL5, inv_volume);
res |= es_write_reg (ES8388_ADDR, ES8388_DACCONTROL4, inv_volume);
volume /= 3;
res |= es_write_reg (ES8388_ADDR, ES8388_DACCONTROL24, volume);
res |= es_write_reg (ES8388_ADDR, ES8388_DACCONTROL25, volume);
res |= es_write_reg (ES8388_ADDR, ES8388_DACCONTROL26, volume);
res |= es_write_reg (ES8388_ADDR, ES8388_DACCONTROL27, volume);
return res;
}
@@ -480,17 +482,22 @@ es8388_get_voice_volume (int *volume)
{
esp_err_t res = ESP_OK;
uint8_t reg = 0;
res = es_read_reg (ES8388_DACCONTROL24, &reg);
res = es_read_reg (ES8388_DACCONTROL4, &reg);
if (res == ESP_FAIL)
{
*volume = 0;
}
else
{
*volume = reg;
*volume *= 3;
if (*volume == 99)
*volume = 100;
// 0 = 0dB, 192 = -96dB
// max is 0, min is 46
// interpolate to 0-100
if (reg == 192) {
*volume = 0;
}
else {
*volume = -(50/23) * reg + 100;
}
}
return res;
}