[i2s_audio] Allow config for primary/secondary i2s mode (#7092)

esphome/components/i2s_audio/__init__.py

@@ -25,6 +25,10 @@ CONF_I2S_LRCLK_PIN = "i2s_lrclk_pin"
 CONF_I2S_AUDIO = "i2s_audio"
 CONF_I2S_AUDIO_ID = "i2s_audio_id"
 
+CONF_I2S_MODE = "i2s_mode"
+CONF_PRIMARY = "primary"
+CONF_SECONDARY = "secondary"
+
 i2s_audio_ns = cg.esphome_ns.namespace("i2s_audio")
 I2SAudioComponent = i2s_audio_ns.class_("I2SAudioComponent", cg.Component)
 I2SAudioIn = i2s_audio_ns.class_("I2SAudioIn", cg.Parented.template(I2SAudioComponent))
@@ -32,6 +36,12 @@ I2SAudioOut = i2s_audio_ns.class_(
     "I2SAudioOut", cg.Parented.template(I2SAudioComponent)
 )
 
+i2s_mode_t = cg.global_ns.enum("i2s_mode_t")
+I2S_MODE_OPTIONS = {
+    CONF_PRIMARY: i2s_mode_t.I2S_MODE_MASTER,  # NOLINT
+    CONF_SECONDARY: i2s_mode_t.I2S_MODE_SLAVE,  # NOLINT
+}
+
 # https://github.com/espressif/esp-idf/blob/master/components/soc/{variant}/include/soc/soc_caps.h
 I2S_PORTS = {
     VARIANT_ESP32: 2,

esphome/components/i2s_audio/microphone/__init__.py

@@ -7,6 +7,9 @@ from esphome.components import microphone, esp32
 from esphome.components.adc import ESP32_VARIANT_ADC1_PIN_TO_CHANNEL, validate_adc_pin
 
 from .. import (
+    CONF_I2S_MODE,
+    CONF_PRIMARY,
+    I2S_MODE_OPTIONS,
     i2s_audio_ns,
     I2SAudioComponent,
     I2SAudioIn,
@@ -68,6 +71,9 @@ BASE_SCHEMA = microphone.MICROPHONE_SCHEMA.extend(
             _validate_bits, cv.enum(BITS_PER_SAMPLE)
         ),
         cv.Optional(CONF_USE_APLL, default=False): cv.boolean,
+        cv.Optional(CONF_I2S_MODE, default=CONF_PRIMARY): cv.enum(
+            I2S_MODE_OPTIONS, lower=True
+        ),
     }
 ).extend(cv.COMPONENT_SCHEMA)
 
@@ -107,6 +113,7 @@ async def to_code(config):
         cg.add(var.set_din_pin(config[CONF_I2S_DIN_PIN]))
         cg.add(var.set_pdm(config[CONF_PDM]))
 
+    cg.add(var.set_i2s_mode(config[CONF_I2S_MODE]))
     cg.add(var.set_channel(config[CONF_CHANNEL]))
     cg.add(var.set_sample_rate(config[CONF_SAMPLE_RATE]))
     cg.add(var.set_bits_per_sample(config[CONF_BITS_PER_SAMPLE]))

esphome/components/i2s_audio/microphone/i2s_audio_microphone.cpp

@@ -46,7 +46,7 @@ void I2SAudioMicrophone::start_() {
     return;  // Waiting for another i2s to return lock
   }
   i2s_driver_config_t config = {
-      .mode = (i2s_mode_t) (I2S_MODE_MASTER | I2S_MODE_RX),
+      .mode = (i2s_mode_t) (this->i2s_mode_ | I2S_MODE_RX),
       .sample_rate = this->sample_rate_,
       .bits_per_sample = this->bits_per_sample_,
       .channel_format = this->channel_,
@@ -174,8 +174,7 @@ size_t I2SAudioMicrophone::read(int16_t *buf, size_t len) {
     size_t samples_read = bytes_read / sizeof(int32_t);
     samples.resize(samples_read);
     for (size_t i = 0; i < samples_read; i++) {
-      int32_t temp = reinterpret_cast<int32_t *>(buf)[i] >> 14;
+      samples[i] = reinterpret_cast<int32_t *>(buf)[i] >> 16;
-      samples[i] = clamp<int16_t>(temp, INT16_MIN, INT16_MAX);
     }
     memcpy(buf, samples.data(), samples_read * sizeof(int16_t));
     return samples_read * sizeof(int16_t);

esphome/components/i2s_audio/microphone/i2s_audio_microphone.h

@@ -30,6 +30,8 @@ class I2SAudioMicrophone : public I2SAudioIn, public microphone::Microphone, pub
   }
 #endif
 
+  void set_i2s_mode(i2s_mode_t mode) { this->i2s_mode_ = mode; }
+
   void set_channel(i2s_channel_fmt_t channel) { this->channel_ = channel; }
   void set_sample_rate(uint32_t sample_rate) { this->sample_rate_ = sample_rate; }
   void set_bits_per_sample(i2s_bits_per_sample_t bits_per_sample) { this->bits_per_sample_ = bits_per_sample; }
@@ -46,6 +48,7 @@ class I2SAudioMicrophone : public I2SAudioIn, public microphone::Microphone, pub
   bool adc_{false};
 #endif
   bool pdm_{false};
+  i2s_mode_t i2s_mode_{};
   i2s_channel_fmt_t channel_;
   uint32_t sample_rate_;
   i2s_bits_per_sample_t bits_per_sample_;