Improvements for -S2

- new partition table for boards with UF2 boot (Adafruit qt py S2)
- better treatment of debug out using "USBCDC" native port
- workarounds for watchdog crashes on -S2
- Add missing but mandatory build flags for -S2 and -C3

platformio.ini

@@ -260,6 +260,7 @@ build_flagsV4 = -g
   -DARDUINO_ARCH_ESP32 -DESP32
   -DCONFIG_LITTLEFS_FOR_IDF_3_2 -DLFS_THREADSAFE
   -D CONFIG_ASYNC_TCP_USE_WDT=0
+  ; -DARDUINO_USB_CDC_ON_BOOT=0 ;; mandatory for "classic ESP32" when builing with arduino-esp32 >=2.0.3
 ;;; V4.4.x libraries (without LOROL_LITTLEFS; with newer NeoPixelBus)
 lib_depsV4 =
   ${env.lib_deps}
@@ -274,10 +275,11 @@ build_flags = -g
   -DCONFIG_IDF_TARGET_ESP32S2
   -D CONFIG_ASYNC_TCP_USE_WDT=0
   -DCO
+  -DARDUINO_USB_MODE=0 ;; WLEDMM - mandatory for ESP32-S2 when builing with arduino-esp32 >=2.0.3
 
 lib_deps =
   ${env.lib_deps}
-  makuna/NeoPixelBus @ 2.6.9
+  makuna/NeoPixelBus @ 2.7.1 ;; WLEDMM - new version is more stable on -S2
   https://github.com/pbolduc/AsyncTCP.git @ 1.2.0
 
 [esp32c3]
@@ -287,6 +289,7 @@ build_flags = -g
   -DCONFIG_IDF_TARGET_ESP32C3
   -D CONFIG_ASYNC_TCP_USE_WDT=0
   -DCO
+  -DARDUINO_USB_MODE=1 ;; WLEDMM - mandatory for ESP32-C3 when builing with arduino-esp32 >=2.0.3
 
 lib_deps =
   ${env.lib_deps}

tools/ESP32-Chip_info.hpp

@@ -545,12 +545,16 @@ void showRealSpeed() {
   Serial.print("FLASH SIZE (magic byte): "); Serial.print(ESP.getFlashChipSize() / (1024.0 * 1024), 2); Serial.println(" MB");
   Serial.print("FLASH MODE (magic byte): "); Serial.print(ESP.getFlashChipMode()); Serial.println(" ;  0=QIO, 1=QOUT, 2=DIO, 3=DOUT or other\n");
 
+  Serial.flush();
   Serial.print("FLASH CHIP ID:   0x"); Serial.println(my_ESP_getFlashChipId(), HEX);
-  Serial.print("FLASH CHIP FREQ: "); Serial.print(my_ESP_getFlashChipSpeed() / 1000000.0, 1); Serial.println(" MHz");
+#if !defined(CONFIG_IDF_TARGET_ESP32S2) && !defined(CONFIG_IDF_TARGET_ESP32C3)
+  //Serial.print("FLASH CHIP FREQ: "); Serial.print(my_ESP_getFlashChipSpeed() / 1000000.0, 1); Serial.println(" MHz"); // this seems to crash on -S2
+#endif
   Serial.print("FLASH REAL SIZE: "); Serial.print(my_ESP_getFlashChipRealSize() / (1024.0 * 1024), 2); Serial.println(" MB");
   Serial.print("FLASH REAL MODE: "); Serial.println(my_ESP_getFlashChipMode());
 
   Serial.println(F("\n------------------------------------"));
+  Serial.flush();
   Serial.print(  "RAM HEAP SIZE:  "); Serial.print(ESP.getHeapSize() / 1024.0, 2); Serial.println(" KB");
   Serial.print(  " FREE RAM:      "); Serial.print(ESP.getFreeHeap() / 1024.0, 2); Serial.println(" KB");
   Serial.print(  " MAX RAM alloc: "); Serial.print(ESP.getMaxAllocHeap() / 1024.0, 2); Serial.println(" KB");
@@ -566,6 +570,7 @@ void showRealSpeed() {
     Serial.println();
     show_psram_info_part2();
   }
+  Serial.flush();
 #endif
 
   Serial.println();

tools/partitions-4MB-tinyuf2_spiffs.csv

@@ -0,0 +1,11 @@
+# ESP-IDF Partition Table
+# Name,   Type, SubType, Offset,  Size, Flags
+# bootloader.bin,,          0x1000, 32K
+# partition table,          0x8000, 4K
+
+nvs,      data, nvs,      0x9000,  20K,
+otadata,  data, ota,      0xe000,  8K,
+ota_0,    0,    ota_0,   0x10000,  1408K,
+ota_1,    0,    ota_1,  0x170000,  1408K,
+uf2,      app,  factory,0x2d0000,  256K,
+spiffs,   data, spiffs, 0x310000,  960K,

usermods/audioreactive/audio_reactive.h

@@ -309,7 +309,7 @@ static float fftAddAvg(int from, int to) {
 //
 void FFTcode(void * parameter)
 {
-  DEBUGSR_PRINT("FFT started on core: "); DEBUGSR_PRINTLN(xPortGetCoreID());
+  // DEBUGSR_PRINT("FFT started on core: "); DEBUGSR_PRINTLN(xPortGetCoreID()); // causes trouble on -S2
 
   // see https://www.freertos.org/vtaskdelayuntil.html
   const TickType_t xFrequency = FFT_MIN_CYCLE * portTICK_PERIOD_MS;  

wled00/pin_manager.cpp

@@ -114,7 +114,7 @@ String PinManagerClass::getPinSpecialText(int gpio) {  // special purpose PIN in
 
     #elif defined(CONFIG_IDF_TARGET_ESP32S2)
       // ESP32-S2
-      if (gpio > 38 && gpio < 43) return (F("USB (CDC) / JTAG"));
+      //if (gpio > 38 && gpio < 43) return (F("USB (CDC) / JTAG"));  // note to self: this seems to be wrong. need to fix later.
       if (gpio == 46) return (F("pulled-down, input only"));
       //if (gpio == 0 || gpio == 45 || gpio == 46) return (F("(strapping pin)"));
 

wled00/wled.cpp

@@ -276,10 +276,22 @@ void WLED::setup()
   #endif
 
   Serial.begin(115200);
-  Serial.setTimeout(50);
   #if defined(WLED_DEBUG) && defined(ARDUINO_ARCH_ESP32) && (defined(CONFIG_IDF_TARGET_ESP32S2) || defined(CONFIG_IDF_TARGET_ESP32C3) || ARDUINO_USB_CDC_ON_BOOT)
   delay(2500);  // allow CDC USB serial to initialise
   #endif
+
+  #if ARDUINO_USB_CDC_ON_BOOT
+  delay(2500);  // WLEDMM: always allow CDC USB serial to initialise
+  Serial.flush();
+  //Serial.setTimeout(350); // WLEDMM: don't change timeout, as it causes crashes later
+  // WLEDMM: redirect debug output to HWCDC
+  Serial0.setDebugOutput(false);
+  Serial.setDebugOutput(true);
+  #else
+  Serial.setTimeout(50);
+  #endif
+
+  //Serial0.setDebugOutput(false);
   //Serial.setDebugOutput(true);
   USER_FLUSH(); delay(100);
   USER_PRINTLN();
@@ -362,6 +374,18 @@ void WLED::setup()
   pinManager.allocatePin(2, true, PinOwner::DMX);
 #endif
 
+// WLEDMM experimental: support for single neoPixel on Adafruit boards
+#if 0
+  //#ifdef PIN_NEOPIXEL
+  //pinManager.allocatePin(PIN_NEOPIXEL, true, PinOwner::BusDigital);
+  //#endif
+  #ifdef NEOPIXEL_POWER
+    pinManager.allocatePin(NEOPIXEL_POWER, true, PinOwner::Relay);  // just to ensure this GPIO will not get used for other purposes
+    pinMode(NEOPIXEL_POWER, OUTPUT);
+    digitalWrite(NEOPIXEL_POWER, HIGH);
+  #endif
+#endif
+
   USER_PRINTLN();
   DEBUG_PRINTLN(F("Registering usermods ..."));
   registerUsermods();
@@ -369,7 +393,7 @@ void WLED::setup()
   for (uint8_t i=1; i<WLED_MAX_BUTTONS; i++) btnPin[i] = -1;
 
   bool fsinit = false;
-  DEBUG_PRINTLN(F("Mount FS"));
+  USER_PRINTLN(F("Mount FS"));
 #ifdef ARDUINO_ARCH_ESP32
   fsinit = WLED_FS.begin(true);
 #else
@@ -386,6 +410,8 @@ void WLED::setup()
 #endif
   updateFSInfo();
 
+  USER_PRINTLN(F("done Mounting FS"));
+
   // generate module IDs must be done before AP setup
   escapedMac = WiFi.macAddress();
   escapedMac.replace(":", "");

wled00/wled.h

@@ -71,6 +71,7 @@
   #include <user_interface.h>
   }
 #else // ESP32
+  #include <HardwareSerial.h>  // WLEDMM: needed to get Serial and HWCDC when using arduino-esp32 v2.0.x
   #include <WiFi.h>
   #include <ETH.h>
   #include "esp_wifi.h"
@@ -744,7 +745,7 @@ WLED_GLOBAL volatile uint8_t jsonBufferLock _INIT(0);
 
 // WLEDMM: macros to print "user messages" to Serial
 // cannot do this on -S2, due to buggy USBCDC serial driver
-#if defined(WLED_DEBUG) || defined(WLED_DEBUG_HOST) || defined(CONFIG_IDF_TARGET_ESP32S2)
+#if defined(WLED_DEBUG) || defined(WLED_DEBUG_HOST)
   // use DEBUG_PRINT
   #define USER_PRINT(x) DEBUG_PRINT(x)
   #define USER_PRINTLN(x) DEBUG_PRINTLN(x)
@@ -756,10 +757,10 @@ WLED_GLOBAL volatile uint8_t jsonBufferLock _INIT(0);
   #endif
 #else
   // if serial is availeable, we use Serial.print directly
-  #define USER_PRINT(x)      { if (canUseSerial()) Serial.print(x); }
-  #define USER_PRINTLN(x)    { if (canUseSerial()) Serial.println(x); }
-  #define USER_PRINTF(x...)  { if (canUseSerial()) Serial.printf(x); }
-  #define USER_FLUSH()       {Serial.flush();}
+  #define USER_PRINT(x)      { if (canUseSerial()) DEBUGOUT.print(x); }
+  #define USER_PRINTLN(x)    { if (canUseSerial()) DEBUGOUT.println(x); }
+  #define USER_PRINTF(x...)  { if (canUseSerial()) DEBUGOUT.printf(x); }
+  #define USER_FLUSH()       {DEBUGOUT.flush();}
 #endif
 // WLEDMM end