I2SClocklessLedDriver based Output

platformio.ini

@@ -309,6 +309,7 @@ build_flags = -g
   ; -D WLEDMM_TWOPATH    ;; use I2S1 as the second bus --> ~15% faster on "V3" builds - may flicker a bit more
   ; -D WLEDMM_SLOWPATH ;; don't use I2S for LED bus
   ; -DARDUINO_USB_CDC_ON_BOOT=0 ;; this flag is mandatory for "classic ESP32" when building with arduino-esp32 >=2.0.3
+  -D WLED_ENABLE_I2SCLOCKLESS
 
 default_partitions = tools/WLED_ESP32_4MB_1MB_FS.csv      ;; WLED standard for 4MB flash: 1.4MB firmware, 1MB filesystem
 ;default_partitions = tools/WLED_ESP32_4MB_256KB_FS.csv   ;; WLEDMM alternative for 4MB flash:   1.8MB firmware, 256KB filesystem (esptool erase_flash needed before changing)
@@ -326,6 +327,7 @@ lib_deps =
   https://github.com/softhack007/LITTLEFS-threadsafe.git#master
   makuna/NeoPixelBus @ 2.7.5
   ;; makuna/NeoPixelBus @ 2.7.9 ;; experimental
+  ${common_mm.I2SClockless_libs}
   ${env.lib_deps}
 
 ;; Compatibility with upstream --> you should prefer using ${common_mm.build_flags_S} and ${common_mm.lib_deps_S}
@@ -363,6 +365,7 @@ lib_depsV4 =
   makuna/NeoPixelBus @ 2.7.5
   ;; makuna/NeoPixelBus @ 2.7.9 ;; experimental
   ${common_mm.HUB75_lib_deps}
+  ${common_mm.I2SClockless_libs}
   ${env.lib_deps}
 
 
@@ -456,12 +459,14 @@ build_flags = -g
   -D CONFIG_ASYNC_TCP_TASK_STACK_SIZE=9472         ;; WLEDMM increase stack by 1.25Kb, as audioreactive needs bigger SETTINGS_STACK_BUF_SIZE
   -DARDUINO_USB_MSC_ON_BOOT=0 -DARDUINO_DFU_ON_BOOT=0
   -DCO
+  -D WLED_ENABLE_I2SCLOCKLESS
   ;; please make sure that the following flags are properly set (to 0 or 1) by your board.json, or included in your custom platformio_override.ini entry:
   ;; ARDUINO_USB_MODE, ARDUINO_USB_CDC_ON_BOOT
 lib_deps =
   https://github.com/pbolduc/AsyncTCP.git @ 1.2.0
   makuna/NeoPixelBus @ 2.7.5
   ;; makuna/NeoPixelBus @ 2.7.9 ;; experimental
+  https://github.com/netmindz/I2SClockLessLedDriveresp32s3#67341fc ;; WLED-compat
   ${env.lib_deps}
 
 
@@ -1018,7 +1023,7 @@ build_disable_sync_interfaces =
   -D WLED_DISABLE_ADALIGHT  ;; WLEDMM this board does not have a serial-to-USB chip. Better to disable serial protocols, to avoid crashes (see upstream #3128)
   -D WLED_DISABLE_ESPNOW ;; ESP-NOW requires wifi, may crash with ethernet only
 
-AR_build_flags = -D USERMOD_AUDIOREACTIVE -D UM_AUDIOREACTIVE_USE_NEW_FFT ;; WLEDMM audioreactive usermod, licensed under GPLv3
+AR_build_flags = ;; -D USERMOD_AUDIOREACTIVE -D UM_AUDIOREACTIVE_USE_NEW_FFT ;; WLEDMM audioreactive usermod, licensed under GPLv3
 AR_lib_deps = https://github.com/softhack007/arduinoFFT.git#develop @ 1.9.2      ;; used for USERMOD_AUDIOREACTIVE - optimized version, 10% faster on -S2/-C3
 
 animartrix_build_flags = -D USERMOD_ANIMARTRIX ;; WLEDMM usermod: CC BY-NC 3.0 licensed effects by Stefan Petrick
@@ -1035,6 +1040,8 @@ HUB75_build_flags =
 HUB75_lib_deps = https://github.com/mrfaptastic/ESP32-HUB75-MatrixPanel-DMA.git @ 3.0.10
 HUB75_lib_ignore = ESP32 HUB75 LED MATRIX PANEL DMA Display ;; to remove the HUB75 lib dependancy (saves a few bytes)
 
+I2SClockless_libs = https://github.com/hpwit/I2SClocklessLedDriver#333754b
+
 NetDebug_build_flags =
   ;; WLEDMM: only setting WLED_DEBUG_HOST is enough, ip and port can be defined in sync settings as well
   -D WLED_DEBUG_HOST='"192.168.x.x"' ;; to send debug messages over network to host 192.168.x.y - FQDN is also possible
@@ -1049,7 +1056,7 @@ build_flags_S =
   ; -D WLED_DISABLE_2D ;; un-comment to build a firmware without 2D matrix support
   ; -D WLED_USE_CIE_BRIGHTNESS_TABLE ;; experimental: use different color / brightness lookup table
   ${common_mm.AR_build_flags} ; use latest (upstream) FFTLib, instead of older library modified by blazoncek. Slightly faster, more accurate, needs 2KB RAM extra   
-  -D USERMOD_AUTO_PLAYLIST
+  ; -D USERMOD_AUTO_PLAYLIST
   ; -D USERMOD_ARTIFX  ;; WLEDMM usermod - temporarily moved into "_M", due to problems in "_S" when compiling with -O2
   -D WLEDMM_FASTPATH ;; WLEDMM experimental option. Reduces audio lag (latency), and allows for faster LED framerates. May break compatibility with previous versions.
   ; -D WLED_DEBUG_HEAP ;; WLEDMM enable heap debugging
@@ -1163,6 +1170,7 @@ build_flags = ${common.build_flags} ${common_mm.build_flags_S} ${common_mm.build
   ;-Wstack-usage=2732       ;; warn if a function needs more that 30% of availeable stack ("stack usage might be unbounded", "stack usage is 2824 bytes")
   ;-Wsuggest-attribute=const -Wsuggest-attribute=pure ;;  ask compiler for hints on attributes
   ${common_mm.DMXin_build_flags}
+
 lib_deps = ${common_mm.lib_deps_S}                               ;;  do not include ${esp32.lib_depsV4} here !!!!
   ${common_mm.DMXin_lib_deps}
 esp32_build_flags = ${esp32.build_flagsV4} ${esp32_4MB_V4_S_base.build_flags} ;; this is for esp32 only, including specific "V4" flags

wled00/bus_manager.cpp

@@ -482,7 +482,63 @@ void BusNetwork::cleanup() {
   if (_data != nullptr) free(_data);
   _data = nullptr;
 }
+// ***************************************************************************
+#ifdef WLED_ENABLE_I2SCLOCKLESS
+
+BusI2SClocklessLedDriver::BusI2SClocklessLedDriver(BusConfig &bc) : Bus(bc.type, bc.start, bc.autoWhite) {
+    USER_PRINTF("Construct BusI2SClocklessLedDriver\n");
+    _valid = false;
+    if (!pinManager.allocatePin(bc.pins[0], true, PinOwner::BusDigital)) return;
+    _pins[0] = bc.pins[0];
+    _pins[1] = bc.pins[1]; // TODO: remove once the UI knows we don't need clock pin
+    USER_PRINTF("initled using pin %d for %d LEDs\n", _pins[0], bc.count);
+    switch(bc.colorOrder) {
+      case 0: color = ORDER_GRB; break;
+      case 1: color = ORDER_RGB; break;
+      case 2: color = ORDER_BGR; break;
+    }
+
+    #ifdef CONFIG_IDF_TARGET_ESP32S3
+    USER_PRINTLN("no color order support for I2SClockLessLedDriveresp32s3");
+    driver.initled((uint8_t*)leds, _pins, 1, bc.count);
+    #else
+    driver.initled((uint8_t*)leds, _pins, 1, bc.count, color);
+    #endif
+
+    _len = bc.count;
+    _valid = true;
+  }
 
+void BusI2SClocklessLedDriver::setPixelColor(uint16_t pix, uint32_t c) {
+  if(_valid) {
+    #ifdef CONFIG_IDF_TARGET_ESP32S3
+    // TODO - use this.color to use the right ordering
+    this->leds[pix] = CRGB(R(c), G(c), B(c));
+    #else
+    this->driver.setPixel(pix, R(c), G(c), B(c));
+    #endif
+  }
+}
+
+void BusI2SClocklessLedDriver::show() {
+  if(_valid) driver.showPixels();
+}
+
+void BusI2SClocklessLedDriver::setBrightness(uint8_t b, bool immediate) {
+  if(_valid) driver.setBrightness(b);
+}
+
+uint8_t BusI2SClocklessLedDriver::getPins(uint8_t* pinArray) {
+  pinArray[0] = _pins[0];
+  pinArray[1] = _pins[1];
+  return 2;
+} 
+
+void BusI2SClocklessLedDriver::cleanup() {
+  pinManager.deallocatePin(_pins[0], PinOwner::BusDigital);
+}
+
+#endif
 // ***************************************************************************
 
 #ifdef WLED_ENABLE_HUB75MATRIX
@@ -742,6 +798,10 @@ int BusManager::add(BusConfig &bc) {
   } else if (bc.type >= TYPE_HUB75MATRIX && bc.type <= (TYPE_HUB75MATRIX + 10)) {
     DEBUG_PRINTLN("BusManager::add - Adding BusHub75Matrix");
     busses[numBusses] = new BusHub75Matrix(bc);
+#endif
+#ifdef WLED_ENABLE_I2SCLOCKLESS
+  } else if (bc.type == TYPE_I2SCL) {
+    busses[numBusses] = new BusI2SClocklessLedDriver(bc);
 #endif
   } else if (IS_DIGITAL(bc.type)) {
     busses[numBusses] = new BusDigital(bc, numBusses, colorOrderMap);

wled00/bus_manager.h

@@ -5,6 +5,16 @@
 #include <ESP32-HUB75-MatrixPanel-I2S-DMA.h>
 #include <ESP32-VirtualMatrixPanel-I2S-DMA.h>
 #endif
+
+#ifdef WLED_ENABLE_I2SCLOCKLESS
+#ifdef CONFIG_IDF_TARGET_ESP32S3
+#include "I2SClockLessLedDriveresp32s3.h"
+#include <FastLED.h>
+#else
+#include "I2SClocklessLedDriver.h"
+#endif
+#endif
+
 /*
  * Class for addressing various light types
  */
@@ -333,6 +343,47 @@ class BusNetwork : public Bus {
     byte     *_data;
 };
 
+#ifdef WLED_ENABLE_I2SCLOCKLESS
+
+class BusI2SClocklessLedDriver : public Bus {
+  public:
+    BusI2SClocklessLedDriver(BusConfig &bc);
+
+    uint16_t getMaxPixels() override { return 1024; }; // TODO: dynamic
+    bool hasRGB() { return true; }
+    bool hasWhite() { return false; }
+
+    void setPixelColor(uint16_t pix, uint32_t c);
+    void setBrightness(uint8_t b, bool immediate);
+
+    void show();
+
+    void cleanup();
+
+    uint8_t getPins(uint8_t* pinArray);
+
+    uint16_t getLength() {
+      return _len;
+    }
+
+  ~BusI2SClocklessLedDriver() {
+    cleanup();
+  }
+
+  private:
+    #ifdef CONFIG_IDF_TARGET_ESP32S3
+    CRGB leds[1024]; // TODO: dynamic
+    I2SClocklessLedDriveresp32S3 driver;
+    #else
+    uint8_t leds[1024*3]; // TODO: dynamic
+    I2SClocklessLedDriver driver;
+    #endif
+    colorarrangment color;
+    int _pins[2] = {0,0};
+};
+
+#endif
+
 #ifdef WLED_ENABLE_HUB75MATRIX
 class BusHub75Matrix : public Bus {
   public:

wled00/const.h

@@ -245,6 +245,8 @@
 #define TYPE_P9813               53
 #define TYPE_LPD6803             54
 
+#define TYPE_I2SCL               61
+
 #define TYPE_HUB75MATRIX         100 // 100 - 110
 
 //Network types (master broadcast) (80-95)

wled00/data/settings_leds.htm

@@ -375,6 +375,7 @@
 <option value="43">PWM RGB</option>\
 <option value="44">PWM RGBW</option>\
 <option value="45">PWM RGB+CCT</option>\
+<option value="61">I2SClockless WS281x</option>\
 <!--option value="46">PWM RGB+DCCT</option-->'}
 <option value="80">DDP RGB (network)</option>
 <!--option value="81">E1.31 RGB (network)</option-->