Add support for latest arduino esp32 board library version 2.0.2

README.md

@@ -4,6 +4,12 @@ ESP32 Audio Kit based multitrack looper
 - video presentation of the initial state of this project https://youtu.be/PKQmOsJ-g1I
 - little quick start guide to get started with arduino synthesizer / music projects: https://youtu.be/ZNxGCB-d68g
 
+Supported versions of board library
+---
+- ESP32 version 1.0.6 from https://github.com/espressif/arduino-esp32/releases/tag/1.0.6
+- ESP32 version 2.0.2 from https://github.com/espressif/arduino-esp32/releases/tag/2.0.2
+Please be aware that other versions might be not supported.
+
 The project has been tested on the ESP32 Audio Kit V2.2
 
 Useful documents:

esp32_multitrack_looper.ino

@@ -73,6 +73,7 @@
  */
 
 
+/* requires the ML_SynthTools library: https://github.com/marcel-licence/ML_SynthTools */
 #include <ml_delay.h>
 #ifdef REVERB_ENABLED
 #include <ml_reverb.h>
@@ -140,6 +141,15 @@ void setup()
     Serial.printf("Total PSRAM: %d\n", ESP.getPsramSize());
     Serial.printf("Free PSRAM: %d\n", ESP.getFreePsram());
 
+    if (ESP.getPsramSize() == 0)
+    {
+        Serial.printf("PSRAM is required for this project!\nPlease ensure that it is enabled in arduino and also supported by your ESP32 controller.");
+        while (true)
+        {
+            sleep(1000);
+        }
+    }
+
 #ifdef ESP32
     Core0TaskInit();
 #else

i2s_interface.ino

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2021 Marcel Licence
+ * Copyright (c) 2022 Marcel Licence
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -149,7 +149,7 @@ bool i2s_write_stereo_samples(float *fl_sample, float *fr_sample)
     sampleDataU.ch[1] = int32_t(*fl_sample * 1073741823.0f);
 #endif
 
-    static size_t bytes_written = 0;
+    size_t bytes_written = 0;
 
 #ifdef SAMPLE_SIZE_16BIT
     i2s_write(i2s_port_number, (const char *)&sampleDataU.sample, 4, &bytes_written, portMAX_DELAY);
@@ -303,7 +303,11 @@ i2s_config_t i2s_configuration =
 #ifdef I2S_NODAC
     .bits_per_sample = I2S_BITS_PER_SAMPLE_32BIT,
     .channel_format = I2S_CHANNEL_FMT_ONLY_LEFT,
+#ifdef ARDUINO_RUNNING_CORE /* tested with arduino esp32 core version 2.0.2 */
+    .communication_format = I2S_COMM_FORMAT_STAND_I2S,
+#else
     .communication_format = (i2s_comm_format_t)I2S_COMM_FORMAT_I2S_MSB,
+#endif
 #else
 #ifdef SAMPLE_SIZE_32BIT
     .bits_per_sample = I2S_BITS_PER_SAMPLE_32BIT, /* the DAC module will only take the 8bits from MSB */
@@ -315,7 +319,11 @@ i2s_config_t i2s_configuration =
     .bits_per_sample = I2S_BITS_PER_SAMPLE_16BIT, /* the DAC module will only take the 8bits from MSB */
 #endif
     .channel_format = I2S_CHANNEL_FMT_RIGHT_LEFT,
+#ifdef ARDUINO_RUNNING_CORE /* tested with arduino esp32 core version 2.0.2 */
+    .communication_format = I2S_COMM_FORMAT_STAND_I2S,
+#else
     .communication_format = (i2s_comm_format_t)(I2S_COMM_FORMAT_I2S | I2S_COMM_FORMAT_I2S_MSB),
+#endif
 #endif
     .intr_alloc_flags = 0, // default interrupt priority
     .dma_buf_count = 8,