i2s-i2s examples

Author: pschatzmann

examples/examples-stream/streams-i2s-i2s-2/streams-i2s-i2s-2.ino

@@ -0,0 +1,57 @@
+/**
+ * @file streams-i2s-filter-i2s-2.ino
+ * @brief Copy audio from I2S to I2S using an FIR filter - We use 2 different i2s ports!
+ * @author Phil Schatzmann
+ * @copyright GPLv3
+ */
+
+#include "AudioTools.h"
+ 
+uint16_t sample_rate=44100;
+uint16_t channels = 2;
+I2SStream in;
+I2SStream out; 
+StreamCopy copier(out, in); // copies sound into i2s
+
+
+// Arduino Setup
+void setup(void) {  
+  // Open Serial 
+  Serial.begin(115200);
+  // change to Warning to improve the quality
+  AudioLogger::instance().begin(Serial, AudioLogger::Info); 
+
+  // start I2S in
+  Serial.println("starting I2S...");
+  auto config_in = in.defaultConfig(RX_MODE);
+  config_in.sample_rate = sample_rate; 
+  config_in.bits_per_sample = 16;
+  config_in.i2s_format = I2S_STD_FORMAT;
+  config_in.is_master = true;
+  config_in.port_no = 0;
+  config_in.pin_ws = 14;
+  config_in.pin_bck = 15;
+  config_in.pin_data = 16;
+  // config_in.fixed_mclk = sample_rate * 256
+  // config_in.pin_mck = 2
+  in.begin(config_in);
+
+  // start I2S out
+  auto config_out = out.defaultConfig(TX_MODE);
+  config_out.sample_rate = sample_rate; 
+  config_out.bits_per_sample = 16;
+  config_out.i2s_format = I2S_STD_FORMAT;
+  config_out.is_master = true;
+  config_out.port_no = 1;
+  config_out.pin_ws = 17;
+  config_out.pin_bck = 18;
+  config_out.pin_data = 19;
+  out.begin(config_out);
+
+  Serial.println("I2S started...");
+}
+
+// Arduino loop - copy sound to out 
+void loop() {
+  copier.copy();
+}

examples/examples-stream/streams-i2s-i2s/streams-i2s-i2s.ino

@@ -1,6 +1,6 @@
 /**
  * @file streams-i2s-filter-i2s.ino
- * @brief Copy audio from I2S to I2S using an FIR filter
+ * @brief Copy audio from I2S to I2S using an FIR filter - I2S uses 1 i2s port
  * @author Phil Schatzmann
  * @copyright GPLv3
  */
@@ -9,9 +9,8 @@
 
 uint16_t sample_rate=44100;
 uint16_t channels = 2;
-I2SStream in;
-I2SStream out; 
-StreamCopy copier(out, in); // copies sound into i2s
+I2SStream i2s;
+StreamCopy copier(i2s, i2s); // copies sound into i2s
 
 
 // Arduino Setup
@@ -23,30 +22,18 @@ void setup(void) {
 
   // start I2S in
   Serial.println("starting I2S...");
-  auto config_in = in.defaultConfig(RX_MODE);
-  config_in.sample_rate = sample_rate; 
-  config_in.bits_per_sample = 16;
-  config_in.i2s_format = I2S_STD_FORMAT;
-  config_in.is_master = true;
-  config_in.port_no = 0;
-  config_in.pin_ws = 14;
-  config_in.pin_bck = 15;
-  config_in.pin_data = 16;
-  // config_in.fixed_mclk = sample_rate * 256
-  // config_in.pin_mck = 2
-  in.begin(config_in);
-
-  // start I2S out
-  auto config_out = out.defaultConfig(TX_MODE);
-  config_out.sample_rate = sample_rate; 
-  config_out.bits_per_sample = 16;
-  config_out.i2s_format = I2S_STD_FORMAT;
-  config_out.is_master = true;
-  config_out.port_no = 1;
-  config_out.pin_ws = 17;
-  config_out.pin_bck = 18;
-  config_out.pin_data = 19;
-  out.begin(config_out);
+  auto config = i2s.defaultConfig(RXTX_MODE);
+  config.sample_rate = sample_rate; 
+  config.bits_per_sample = 16;
+  config.channels = 2;
+  config.i2s_format = I2S_STD_FORMAT;
+  config.pin_ws = 14;
+  config.pin_bck = 15;
+  config.pin_data = 16;
+  config.pin_data_in = 17;
+  config.fixed_mclk = sample_rate * 256
+  config.pin_mck = 2
+  i2s.begin(config);
 
   Serial.println("I2S started...");
 }