51 lines
1.4 KiB
C++
51 lines
1.4 KiB
C++
/**
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* @file basic-i2s-a2dp.ino
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* @author Phil Schatzmann
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* @brief We use a INMP441 I2S microphone as input and send the data to A2DP
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* Unfortunatly the data type from the microphone (int32_t) does not match with
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* the required data type by A2DP (int16_t), so we need to convert.
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* @copyright GPLv3
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*/
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#include "AudioTools.h"
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#include "AudioTools/Communication/A2DPStream.h"
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AudioInfo info32(44100, 2, 32);
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AudioInfo info16(44100, 2, 16);
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BluetoothA2DPSource a2dp_source;
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I2SStream i2s;
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FormatConverterStream conv(i2s);
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const int BYTES_PER_FRAME = 4;
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int32_t get_sound_data(Frame* data, int32_t frameCount) {
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return conv.readBytes((uint8_t*)data, frameCount*BYTES_PER_FRAME)/BYTES_PER_FRAME;
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}
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// Arduino Setup
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void setup(void) {
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Serial.begin(115200);
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AudioToolsLogger.begin(Serial, AudioToolsLogLevel::Info);
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// setup conversion
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conv.begin(info32, info16);
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// start i2s input with default configuration
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Serial.println("starting I2S...");
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auto cfg = i2s.defaultConfig(RX_MODE);
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cfg.i2s_format = I2S_STD_FORMAT; // or try with I2S_LSB_FORMAT
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cfg.copyFrom(info32);
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cfg.is_master = true;
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i2s.begin(cfg);
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// start the bluetooth
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Serial.println("starting A2DP...");
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// a2dp_source.set_auto_reconnect(false);
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a2dp_source.set_data_callback_in_frames(get_sound_data);
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a2dp_source.start("LEXON MINO L");
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Serial.println("A2DP started");
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}
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// Arduino loop - repeated processing
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void loop() { delay(1000); } |