Prvni ulozeni z chegewara githubu

libraries/I2S/examples/FullDuplex/FullDuplex.ino

@@ -0,0 +1,59 @@
+/*
+ This example is only for ESP
+ This example demonstrates simultaneous usage of microphone and speaker using single I2S module.
+ The application transfers data from input to output
+
+ Circuit:
+ * ESP32
+   * GND connected GND
+   * VIN connected 5V
+   * SCK 5
+   * FS 25
+   * DIN 35
+   * DOUT 26
+ * I2S microphone
+ * I2S decoder + headphones / speaker
+
+ created 8 October 2021
+ by Tomas Pilny
+ */
+
+#include <I2S.h>
+const long sampleRate = 16000;
+const int bitsPerSample = 32;
+uint8_t *buffer;
+
+void setup() {
+  Serial.begin(115200);
+  //I2S.setAllPins(5, 25, 35, 26); // you can change default pins; order of pins = (CLK, WS, IN, OUT)
+  if(!I2S.setDuplex()){
+    Serial.println("ERROR - could not set duplex");
+    while(true){
+      vTaskDelay(10); // Cannot continue
+    }
+  }
+  if (!I2S.begin(I2S_PHILIPS_MODE, sampleRate, bitsPerSample)) {
+    Serial.println("Failed to initialize I2S!");
+    while(true){
+      vTaskDelay(10); // Cannot continue
+    }
+  }
+  buffer = (uint8_t*) malloc(I2S.getBufferSize() * (bitsPerSample / 8));
+  if(buffer == NULL){
+    Serial.println("Failed to allocate buffer!");
+    while(true){
+      vTaskDelay(10); // Cannot continue
+    }
+  }
+  Serial.println("Setup done");
+}
+
+void loop() {
+  //I2S.write(I2S.read()); // primitive implementation sample-by-sample
+
+  // Buffer based implementation
+  I2S.read(buffer, I2S.getBufferSize() * (bitsPerSample / 8));
+  I2S.write(buffer, I2S.getBufferSize() * (bitsPerSample / 8));
+
+  //optimistic_yield(1000); // yield if last yield occurred before <parameter> CPU clock cycles ago
+}