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minimacplus
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Disable amp if no sound

This commit is contained in:
Jeroen Domburg 2017-11-09 15:25:43 -08:00
parent 7a1835a647
commit 49d6ff6ac4
1 changed files with 17 additions and 0 deletions
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17
components/tme-esp32/snd.c
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@ -12,9 +12,13 @@ static QueueHandle_t soundQueue;
//powers of 2 plzthx
#define BUFLEN 2048
#define IO_AMP_DIS 2
static uint8_t buf[BUFLEN];
static volatile int wp=256, rp=0;
static int ampPowerTimeout=0;
static int bufLen() {
return (wp-rp)&(BUFLEN-1);
}
@ -55,12 +59,16 @@ int sndPush(uint8_t *data, int volume) {
wp++;
if (wp>=BUFLEN) wp=0;
}
gpio_set_level(IO_AMP_DIS, 0);
ampPowerTimeout=10;
} else {
//muted
for (int i=0; i<370; i++) {
buf[wp++]=128;
if (wp>=BUFLEN) wp=0;
}
ampPowerTimeout--;
if (ampPowerTimeout==0) gpio_set_level(IO_AMP_DIS, 1);
}
return 1;
}
@ -81,6 +89,15 @@ void sndInit() {
i2s_set_dac_mode(I2S_DAC_CHANNEL_LEFT_EN);
i2s_set_sample_rates(0, cfg.sample_rate);
gpio_config_t io_conf_amp={
.intr_type=GPIO_INTR_DISABLE,
.mode=GPIO_MODE_OUTPUT,
.pull_up_en=1,
.pin_bit_mask=(1<<IO_AMP_DIS) //Amp enable line
};
gpio_config(&io_conf_amp);
#if 1
//I2S enables *both* DAC channels; we only need DAC2. DAC1 is connected to the select button.
CLEAR_PERI_REG_MASK(RTC_IO_PAD_DAC1_REG, RTC_IO_PDAC1_DAC_XPD_FORCE_M);