From 76da43a7978ef841407e57f679a6d1293a33d76a Mon Sep 17 00:00:00 2001
From: Markus Kalkbrenner <git@kalki.de>
Date: Tue, 16 Dec 2025 20:14:05 +0100
Subject: [PATCH 01/27] added experimental spi transport

---
 src/main.cpp                     |   6 +-
 src/main.h                       |   2 +
 src/transports/spi_transport.cpp | 167 ++++++++++++++++++++++++++++++-
 src/transports/spi_transport.h   |  42 ++++++++
 src/transports/transport.h       |   2 +
 5 files changed, 212 insertions(+), 7 deletions(-)

diff --git a/src/main.cpp b/src/main.cpp
index 4649c40..ce61abc 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -949,7 +949,7 @@ uint8_t HandleData(uint8_t *pData, size_t len) {
   bool headerCompleted = false;
 
   while (pos < len ||
-         (headerCompleted && command != 5 && command != 22 && command != 23 &&
+         (headerCompleted && command != 4 && command != 5 && command != 22 && command != 23 &&
           command != 27 && command != 28 && command != 29 && command != 40 &&
           command != 41 && command != 42 && command != 43 && command != 44 &&
           command != 45 && command != 46 && command != 47 && command != 48)) {
@@ -2331,6 +2331,8 @@ void loop() {
 
 #ifdef DMDREADER
 void loop1() {
+  transport->SetupEnablePin();
+  
   if (transport->isLoopback()) {
     uint8_t *buffer = dmdreader_loopback_render();
     if (buffer != nullptr) {
@@ -2340,7 +2342,7 @@ void loop1() {
       tight_loop_contents();
     }
   } else {
-    // @todo SPI
+    // SPI uses interrupts.
     delay(100);
   }
 }
diff --git a/src/main.h b/src/main.h
index 333333c..8575141 100644
--- a/src/main.h
+++ b/src/main.h
@@ -94,6 +94,8 @@ extern const uint8_t CtrlChars[6];
 extern const uint8_t rgbOrder[];
 extern uint16_t shortId;
 extern uint8_t wifiPower;
+class Clock;
+extern Clock lastDataReceivedClock;
 extern uint8_t usbPackageSizeMultiplier;
 extern uint8_t rgbMode;
 extern uint8_t rgbModeLoaded;
diff --git a/src/transports/spi_transport.cpp b/src/transports/spi_transport.cpp
index 8c14a7b..8cb2140 100644
--- a/src/transports/spi_transport.cpp
+++ b/src/transports/spi_transport.cpp
@@ -3,6 +3,13 @@
 #include "main.h"
 #ifdef DMDREADER
 #include <dmdreader.h>
+
+#include "pico/zedmd_spi_input.pio.h"
+#include "utility/clock.h"
+#endif
+
+#ifdef DMDREADER
+SpiTransport* SpiTransport::s_instance = nullptr;
 #endif
 
 SpiTransport::SpiTransport() : Transport() { m_type = SPI; }
@@ -10,14 +17,21 @@ SpiTransport::SpiTransport() : Transport() { m_type = SPI; }
 SpiTransport::~SpiTransport() { deinit(); }
 
 bool SpiTransport::init() {
-  #ifdef DMDREADER
-  dmdreader_init(pio1);
+#ifdef DMDREADER
+  dmdreader_init(m_pio);
 
-  // @todo Check if SPI is established, otherwise use loopback
-  dmdreader_loopback_init(buffers[0], buffers[1], Color::GREEN);
+  // Start in loopback mode until the host enables SPI via GPIO 13.
+  dmdreader_loopback_init(buffers[0], buffers[1], Color::ORANGE);
   m_loopback = true;
 
-  #endif
+  pinMode(kEnablePin, INPUT_PULLDOWN);
+  pinMode(kClockPin, INPUT);
+  pinMode(kDataPin, INPUT);
+
+  initPio();
+  m_dmaChannel = dma_claim_unused_channel(true);
+  s_instance = this;
+#endif
 
   m_active = true;
   transportActive = true;
@@ -28,6 +42,15 @@ bool SpiTransport::init() {
 bool SpiTransport::deinit() {
   if (m_active) {
     m_active = false;
+#ifdef DMDREADER
+    if (m_irqInitialized) {
+      gpio_set_irq_enabled(kEnablePin,
+                           GPIO_IRQ_EDGE_RISE | GPIO_IRQ_EDGE_FALL, false);
+      m_irqInitialized = false;
+      s_instance = nullptr;
+    }
+    disableSpiStateMachine();
+#endif
     // TODO ? clean exit ?
     // delay(500);
     // vTaskDelete(m_task);
@@ -35,3 +58,137 @@ bool SpiTransport::deinit() {
 
   return true;
 }
+
+#ifdef DMDREADER
+
+void SpiTransport::initPio() {
+  m_stateMachine = pio_claim_unused_sm(m_pio, true);
+  m_programOffset = pio_add_program(m_pio, &zedmd_spi_input_program);
+
+  pio_gpio_init(m_pio, kClockPin);
+  pio_gpio_init(m_pio, kDataPin);
+  pio_sm_set_consecutive_pindirs(m_pio, m_stateMachine, kClockPin, 1, false);
+  pio_sm_set_consecutive_pindirs(m_pio, m_stateMachine, kDataPin, 1, false);
+
+  pio_sm_config config =
+      zedmd_spi_input_program_get_default_config(m_programOffset);
+  sm_config_set_in_pins(&config, kDataPin);
+  sm_config_set_jmp_pin(&config, kClockPin);
+  sm_config_set_in_shift(&config, false, true, 8);
+  sm_config_set_fifo_join(&config, PIO_FIFO_JOIN_RX);
+
+  pio_sm_init(m_pio, m_stateMachine, m_programOffset, &config);
+  pio_sm_set_enabled(m_pio, m_stateMachine, false);
+}
+
+void SpiTransport::enableSpiStateMachine() {
+  if (m_spiEnabled) return;
+
+  pio_sm_set_enabled(m_pio, m_stateMachine, false);
+  pio_sm_clear_fifos(m_pio, m_stateMachine);
+  pio_sm_restart(m_pio, m_stateMachine);
+  pio_sm_set_enabled(m_pio, m_stateMachine, true);
+  m_spiEnabled = true;
+}
+
+void SpiTransport::disableSpiStateMachine() {
+  if (!m_spiEnabled || m_stateMachine < 0) return;
+  pio_sm_set_enabled(m_pio, m_stateMachine, false);
+  m_spiEnabled = false;
+}
+
+void SpiTransport::flushRxBuffer() {
+  if (m_rxBufferPos == 0) return;
+  transportActive = true;
+  HandleData(m_rxBuffer, m_rxBufferPos);
+  m_rxBufferPos = 0;
+}
+
+void SpiTransport::startDma() {
+  if (m_dmaChannel < 0 || m_stateMachine < 0) return;
+  m_rxBufferPos = 0;
+  dma_channel_config cfg = dma_channel_get_default_config(m_dmaChannel);
+  channel_config_set_transfer_data_size(&cfg, DMA_SIZE_8);
+  channel_config_set_read_increment(&cfg, false);
+  channel_config_set_write_increment(&cfg, true);
+  channel_config_set_dreq(&cfg, pio_get_dreq(m_pio, m_stateMachine, false));
+
+  dma_channel_configure(m_dmaChannel, &cfg, m_rxBuffer,
+                        &m_pio->rxf[m_stateMachine], kRxBufferSize, true);
+  m_dmaRunning = true;
+}
+
+void SpiTransport::stopDmaAndFlush() {
+  if (m_dmaChannel < 0) return;
+
+  uint32_t remaining = dma_channel_hw_addr(m_dmaChannel)->transfer_count;
+  dma_channel_abort(m_dmaChannel);
+  m_dmaRunning = false;
+
+  // Bytes already written by DMA
+  m_rxBufferPos = kRxBufferSize - remaining;
+  if (m_rxBufferPos > kRxBufferSize) m_rxBufferPos = 0;
+
+  // Drain any residual FIFO bytes that arrived after the DMA stop.
+  while (!pio_sm_is_rx_fifo_empty(m_pio, m_stateMachine) &&
+         m_rxBufferPos < kRxBufferSize) {
+    const uint32_t raw = pio_sm_get(m_pio, m_stateMachine);
+    m_rxBuffer[m_rxBufferPos++] = raw & 0xff;
+  }
+
+  flushRxBuffer();
+}
+
+void SpiTransport::switchToSpiMode() {
+  if (!m_loopback) return;
+  m_loopback = false;
+  m_transferActive = false;
+  m_rxBufferPos = 0;
+  payloadMissing = 0;
+  headerBytesReceived = 0;
+  numCtrlCharsFound = 0;
+  transportActive = false;
+  enableSpiStateMachine();
+}
+
+void SpiTransport::onEnableRise() {
+  if (m_loopback) {
+    switchToSpiMode();
+    return;
+  }
+  if (m_transferActive) {
+    stopDmaAndFlush();
+    m_transferActive = false;
+  }
+}
+
+void SpiTransport::onEnableFall() {
+  if (m_loopback) return;
+  if (!m_transferActive) {
+    m_transferActive = true;
+    enableSpiStateMachine();
+    startDma();
+  }
+}
+
+void SpiTransport::gpio_irq_handler(uint gpio, uint32_t events) {
+  if (!s_instance || gpio != kEnablePin) return;
+  if (events & GPIO_IRQ_EDGE_RISE) {
+    s_instance->onEnableRise();
+  }
+  if (events & GPIO_IRQ_EDGE_FALL) {
+    s_instance->onEnableFall();
+  }
+}
+
+void SpiTransport::SetupEnablePin() {
+  // Initialize GPIO IRQ from core1 (loop1) so callbacks run on core1.
+  if (!m_irqInitialized) {
+    gpio_set_irq_enabled_with_callback(
+        kEnablePin, GPIO_IRQ_EDGE_RISE | GPIO_IRQ_EDGE_FALL, true,
+        &SpiTransport::gpio_irq_handler);
+    m_irqInitialized = true;
+  }
+}
+
+#endif
diff --git a/src/transports/spi_transport.h b/src/transports/spi_transport.h
index f73805e..0f36c02 100644
--- a/src/transports/spi_transport.h
+++ b/src/transports/spi_transport.h
@@ -4,6 +4,12 @@
 #ifdef PICO_BUILD
 #include "pico/zedmd_pico.h"
 #endif
+#ifdef DMDREADER
+#include "hardware/dma.h"
+#include "hardware/gpio.h"
+#include "hardware/pio.h"
+#endif
+#include "main.h"
 #include "transport.h"
 
 class SpiTransport final : public Transport {
@@ -15,6 +21,42 @@ class SpiTransport final : public Transport {
   bool init() override;
 
   bool deinit() override;
+
+#ifdef DMDREADER
+  void SetupEnablePin();
+#endif
+
+ private:
+#ifdef DMDREADER
+  void initPio();
+  void enableSpiStateMachine();
+  void disableSpiStateMachine();
+  void flushRxBuffer();
+  void startDma();
+  void stopDmaAndFlush();
+  void switchToSpiMode();
+  void onEnableRise();
+  void onEnableFall();
+  static void gpio_irq_handler(uint gpio, uint32_t events);
+
+  static constexpr uint8_t kEnablePin = 13;
+  static constexpr uint8_t kClockPin = 14;
+  static constexpr uint8_t kDataPin = 15;
+  static constexpr size_t kRxBufferSize = BUFFER_SIZE;
+
+  static SpiTransport* s_instance;
+
+  PIO m_pio = pio1;
+  int m_stateMachine = -1;
+  int m_programOffset = -1;
+  int m_dmaChannel = -1;
+  bool m_spiEnabled = false;
+  bool m_transferActive = false;
+  bool m_dmaRunning = false;
+  bool m_irqInitialized = false;
+  uint8_t m_rxBuffer[kRxBufferSize];
+  size_t m_rxBufferPos = 0;
+#endif
 };
 
 #endif  // ZEDMD_SPI_TRANSPORT_H
diff --git a/src/transports/transport.h b/src/transports/transport.h
index c45dece..4aa37be 100644
--- a/src/transports/transport.h
+++ b/src/transports/transport.h
@@ -54,6 +54,8 @@ class Transport {
 
   bool isLoopback() const { return m_loopback; }
 
+  void SetupEnablePin() {}
+
  protected:
   uint8_t m_type = USB;
   bool m_active = false;

From c9efdd89a2353623c91e83f65422ee661208e60e Mon Sep 17 00:00:00 2001
From: Markus Kalkbrenner <git@kalki.de>
Date: Tue, 16 Dec 2025 20:28:39 +0100
Subject: [PATCH 02/27] send dmdreader signals

---
 src/main.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/main.cpp b/src/main.cpp
index ce61abc..73a52be 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -2332,7 +2332,7 @@ void loop() {
 #ifdef DMDREADER
 void loop1() {
   transport->SetupEnablePin();
-  
+
   if (transport->isLoopback()) {
     uint8_t *buffer = dmdreader_loopback_render();
     if (buffer != nullptr) {
@@ -2345,5 +2345,8 @@ void loop1() {
     // SPI uses interrupts.
     delay(100);
   }
+  elseif (!dmdreader_spi_send()) {
+    tight_loop_contents();
+  }
 }
 #endif

From 629eaa3666e81b35777ef75241f55f7143e69080 Mon Sep 17 00:00:00 2001
From: Markus Kalkbrenner <git@kalki.de>
Date: Tue, 16 Dec 2025 20:56:12 +0100
Subject: [PATCH 03/27]  added pio

---
 src/main.cpp                     |  5 +----
 src/pico/zedmd_spi_input.pio     | 10 ++++++++++
 src/transports/spi_transport.cpp |  1 -
 3 files changed, 11 insertions(+), 5 deletions(-)
 create mode 100644 src/pico/zedmd_spi_input.pio

diff --git a/src/main.cpp b/src/main.cpp
index 73a52be..fdb905e 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -2341,11 +2341,8 @@ void loop1() {
     } else {
       tight_loop_contents();
     }
-  } else {
-    // SPI uses interrupts.
-    delay(100);
   }
-  elseif (!dmdreader_spi_send()) {
+  else if (!dmdreader_spi_send()) {
     tight_loop_contents();
   }
 }
diff --git a/src/pico/zedmd_spi_input.pio b/src/pico/zedmd_spi_input.pio
new file mode 100644
index 0000000..9e228d9
--- /dev/null
+++ b/src/pico/zedmd_spi_input.pio
@@ -0,0 +1,10 @@
+.program zedmd_spi_input
+
+; Simple clocked input PIO program for ZeDMD SPI transport.
+; Samples data on GPIO 15 using GPIO 14 as the external clock.
+
+.wrap_target
+wait 1 gpio 14    ; wait for clock high
+in pins, 1        ; sample GPIO 15 (IN pin base)
+wait 0 gpio 14    ; wait for clock low
+.wrap
diff --git a/src/transports/spi_transport.cpp b/src/transports/spi_transport.cpp
index 8cb2140..0ab93d3 100644
--- a/src/transports/spi_transport.cpp
+++ b/src/transports/spi_transport.cpp
@@ -73,7 +73,6 @@ void SpiTransport::initPio() {
   pio_sm_config config =
       zedmd_spi_input_program_get_default_config(m_programOffset);
   sm_config_set_in_pins(&config, kDataPin);
-  sm_config_set_jmp_pin(&config, kClockPin);
   sm_config_set_in_shift(&config, false, true, 8);
   sm_config_set_fifo_join(&config, PIO_FIFO_JOIN_RX);
 

From 98e8a060de4046bf17f9376a5428ae444908eb7a Mon Sep 17 00:00:00 2001
From: Markus Kalkbrenner <git@kalki.de>
Date: Thu, 18 Dec 2025 00:07:42 +0100
Subject: [PATCH 04/27] added color menu

---
 src/main.cpp                     | 110 +++++++++++++++++++++++++++----
 src/transports/spi_transport.cpp |  16 ++---
 src/transports/spi_transport.h   |   6 +-
 src/transports/transport.h       |   4 +-
 4 files changed, 115 insertions(+), 21 deletions(-)

diff --git a/src/main.cpp b/src/main.cpp
index fdb905e..a3deb45 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -137,6 +137,32 @@ uint8_t panelDriver = 0;
 uint8_t panelI2sspeed = 8;
 uint8_t panelLatchBlanking = 2;
 uint8_t panelMinRefreshRate = 60;
+#ifdef DMDREADER
+uint8_t loopbackColor = (uint8_t)Color::ORANGE;
+
+const char *ColorString(uint8_t color) {
+  switch ((Color)color) {
+    case Color::ORANGE:
+      return "orange";
+    case Color::RED:
+      return "red   ";
+    case Color::YELLOW:
+      return "yellow";
+    case Color::GREEN:
+      return "green ";
+    case Color::BLUE:
+      return "blue  ";
+    case Color::VIOLET:
+      return "violet";
+    case Color::PINK:
+      return "pink  ";
+    case Color::WHITE:
+      return "white ";
+    default:
+      return nullptr;
+  }
+}
+#endif
 
 // We needed to change these from RGB to RC (Red Color), BC, GC to prevent
 // conflicting with the TFT_SPI Library.
@@ -507,6 +533,28 @@ void LoadScale() {
   f.close();
 }
 
+#ifdef DMDREADER
+void SaveColor() {
+  File f = LittleFS.open("/color.val", "w");
+  f.write(loopbackColor);
+  f.close();
+}
+
+void LoadColor() {
+  File f = LittleFS.open("/color.val", "r");
+  if (!f) {
+    SaveColor();
+    return;
+  }
+  loopbackColor = f.read();
+  if (ColorString(loopbackColor) == nullptr) {
+    loopbackColor = (uint8_t)Color::ORANGE;
+    SaveColor();
+  }
+  f.close();
+}
+#endif
+
 #ifdef SPEAKER_LIGHTS
 void SaveSpeakerLightsSettings() {
   File f = LittleFS.open("/speaker_lights_left_num.val", "w");
@@ -929,13 +977,21 @@ void RefreshSetupScreen() {
     DisplayNumber(usbPackageSizeMultiplier * 32, 4,
                   7 * (TOTAL_WIDTH / 128) + (16 * 4), (TOTAL_HEIGHT / 2) + 4,
                   255, 191, 0);
-  }
-  if (transport->isWifi()) {
+  } else if (transport->isWifi()) {
     display->DisplayText("UDP Delay:", 7 * (TOTAL_WIDTH / 128),
                          (TOTAL_HEIGHT / 2) + 4, 128, 128, 128);
     DisplayNumber(transport->getDelay(), 1, 7 * (TOTAL_WIDTH / 128) + 10 * 4,
                   (TOTAL_HEIGHT / 2) + 4, 255, 191, 0);
   }
+#ifdef DMDREADER
+  else if (transport->isSpi()) {
+    display->DisplayText("Color:", 7 * (TOTAL_WIDTH / 128),
+                         (TOTAL_HEIGHT / 2) + 4, 128, 128, 128);
+    display->DisplayText(ColorString(loopbackColor),
+                         7 * (TOTAL_WIDTH / 128) + (6 * 4),
+                         (TOTAL_HEIGHT / 2) + 4, 255, 191, 0);
+  }
+#endif
 #ifdef ZEDMD_HD_HALF
   display->DisplayText("Y-Offset", TOTAL_WIDTH - (7 * (TOTAL_WIDTH / 128)) - 32,
                        (TOTAL_HEIGHT / 2) - 10, 128, 128, 128);
@@ -949,10 +1005,11 @@ uint8_t HandleData(uint8_t *pData, size_t len) {
   bool headerCompleted = false;
 
   while (pos < len ||
-         (headerCompleted && command != 4 && command != 5 && command != 22 && command != 23 &&
-          command != 27 && command != 28 && command != 29 && command != 40 &&
-          command != 41 && command != 42 && command != 43 && command != 44 &&
-          command != 45 && command != 46 && command != 47 && command != 48)) {
+         (headerCompleted && command != 4 && command != 5 && command != 22 &&
+          command != 23 && command != 27 && command != 28 && command != 29 &&
+          command != 40 && command != 41 && command != 42 && command != 43 &&
+          command != 44 && command != 45 && command != 46 && command != 47 &&
+          command != 48)) {
     headerCompleted = false;
     if (numCtrlCharsFound < N_CTRL_CHARS) {
       // Detect 5 consecutive start bits
@@ -1728,7 +1785,9 @@ void setup() {
     LoadSettingsMenu();
     LoadTransport();
 
-#ifndef DMDREADER
+#ifdef DMDREADER
+    LoadColor();
+#else
     LoadUsbPackageSizeMultiplier();
 #endif
 #if defined(DISPLAY_LED_MATRIX) || defined(DISPLAY_PICO_LED_MATRIX)
@@ -1872,7 +1931,7 @@ void setup() {
         if (transport->isUsb()) {
           if (position == 4) position = forward ? 5 : 3;
         } else if (transport->isSpi()) {
-          if (position == 3 || position == 4) position = forward ? 5 : 2;
+          if (position == 3) position = forward ? 4 : 2;
         } else {
           if (position == 3) position = forward ? 4 : 2;
         }
@@ -1896,12 +1955,21 @@ void setup() {
                                  (TOTAL_HEIGHT / 2) + 4, 255, 191, 0);
             break;
           }
+#ifdef DMDREADER
+          case 4: {  // Color
+            RefreshSetupScreen();
+            display->DisplayText("Color:", 7 * (TOTAL_WIDTH / 128),
+                                 TOTAL_HEIGHT / 2 + 4, 255, 191, 0);
+            break;
+          }
+#else
           case 4: {  // UDP Delay
             RefreshSetupScreen();
             display->DisplayText("UDP Delay:", 7 * (TOTAL_WIDTH / 128),
                                  TOTAL_HEIGHT / 2 + 4, 255, 191, 0);
             break;
           }
+#endif
           case 5: {  // Transport
             RefreshSetupScreen();
             display->DisplayText(transport->getTypeString(),
@@ -1968,6 +2036,23 @@ void setup() {
             SaveUsbPackageSizeMultiplier();
             break;
           }
+#ifdef DMDREADER
+          case 4: {  // Color
+            if (up && ++loopbackColor > ((uint8_t)Color::WHITE))
+              loopbackColor = ((uint8_t)Color::ORANGE);
+            else if (down &&
+                     --loopbackColor >
+                         ((uint8_t)Color::WHITE))  // underflow will result in
+                                                   // 255, set it to WHITE
+              loopbackColor = ((uint8_t)Color::WHITE);
+
+            display->DisplayText(ColorString(loopbackColor),
+                                 7 * (TOTAL_WIDTH / 128) + (6 * 4),
+                                 TOTAL_HEIGHT / 2 + 4, 255, 191, 0);
+            SaveColor();
+            break;
+          }
+#else
           case 4: {  // UDP Delay
             uint8_t delay = transport->getDelay();
             if (up && ++delay > 9)
@@ -1982,6 +2067,7 @@ void setup() {
             transport->saveDelay();
             break;
           }
+#endif
           case 5: {  // Transport
 #ifdef ZEDMD_NO_NETWORKING
             const uint8_t type = transport->getType() == Transport::USB
@@ -2074,6 +2160,9 @@ void setup() {
     }
   }
 
+#ifdef DMDREADER
+  transport->SetColor(loopbackColor);
+#endif
   transport->init();
 
 #ifdef SPEAKER_LIGHTS
@@ -2331,7 +2420,7 @@ void loop() {
 
 #ifdef DMDREADER
 void loop1() {
-  transport->SetupEnablePin();
+  //transport->SetupEnablePin();
 
   if (transport->isLoopback()) {
     uint8_t *buffer = dmdreader_loopback_render();
@@ -2341,8 +2430,7 @@ void loop1() {
     } else {
       tight_loop_contents();
     }
-  }
-  else if (!dmdreader_spi_send()) {
+  } else if (!dmdreader_spi_send()) {
     tight_loop_contents();
   }
 }
diff --git a/src/transports/spi_transport.cpp b/src/transports/spi_transport.cpp
index 0ab93d3..6f0a95d 100644
--- a/src/transports/spi_transport.cpp
+++ b/src/transports/spi_transport.cpp
@@ -2,8 +2,6 @@
 
 #include "main.h"
 #ifdef DMDREADER
-#include <dmdreader.h>
-
 #include "pico/zedmd_spi_input.pio.h"
 #include "utility/clock.h"
 #endif
@@ -21,7 +19,7 @@ bool SpiTransport::init() {
   dmdreader_init(m_pio);
 
   // Start in loopback mode until the host enables SPI via GPIO 13.
-  dmdreader_loopback_init(buffers[0], buffers[1], Color::ORANGE);
+  dmdreader_loopback_init(buffers[0], buffers[1], m_color);
   m_loopback = true;
 
   pinMode(kEnablePin, INPUT_PULLDOWN);
@@ -44,8 +42,8 @@ bool SpiTransport::deinit() {
     m_active = false;
 #ifdef DMDREADER
     if (m_irqInitialized) {
-      gpio_set_irq_enabled(kEnablePin,
-                           GPIO_IRQ_EDGE_RISE | GPIO_IRQ_EDGE_FALL, false);
+      gpio_set_irq_enabled(kEnablePin, GPIO_IRQ_EDGE_RISE | GPIO_IRQ_EDGE_FALL,
+                           false);
       m_irqInitialized = false;
       s_instance = nullptr;
     }
@@ -183,11 +181,13 @@ void SpiTransport::gpio_irq_handler(uint gpio, uint32_t events) {
 void SpiTransport::SetupEnablePin() {
   // Initialize GPIO IRQ from core1 (loop1) so callbacks run on core1.
   if (!m_irqInitialized) {
-    gpio_set_irq_enabled_with_callback(
-        kEnablePin, GPIO_IRQ_EDGE_RISE | GPIO_IRQ_EDGE_FALL, true,
-        &SpiTransport::gpio_irq_handler);
+    gpio_set_irq_enabled_with_callback(kEnablePin,
+                                       GPIO_IRQ_EDGE_RISE | GPIO_IRQ_EDGE_FALL,
+                                       true, &SpiTransport::gpio_irq_handler);
     m_irqInitialized = true;
   }
 }
 
+void SpiTransport::SetColor(uint8_t color) { m_color = (Color)color; }
+
 #endif
diff --git a/src/transports/spi_transport.h b/src/transports/spi_transport.h
index 0f36c02..f20a27f 100644
--- a/src/transports/spi_transport.h
+++ b/src/transports/spi_transport.h
@@ -5,6 +5,8 @@
 #include "pico/zedmd_pico.h"
 #endif
 #ifdef DMDREADER
+#include <dmdreader.h>
+
 #include "hardware/dma.h"
 #include "hardware/gpio.h"
 #include "hardware/pio.h"
@@ -23,7 +25,8 @@ class SpiTransport final : public Transport {
   bool deinit() override;
 
 #ifdef DMDREADER
-  void SetupEnablePin();
+  void SetupEnablePin() override;
+  void SetColor(uint8_t color) override;
 #endif
 
  private:
@@ -56,6 +59,7 @@ class SpiTransport final : public Transport {
   bool m_irqInitialized = false;
   uint8_t m_rxBuffer[kRxBufferSize];
   size_t m_rxBufferPos = 0;
+  Color m_color = Color::ORANGE;
 #endif
 };
 
diff --git a/src/transports/transport.h b/src/transports/transport.h
index 4aa37be..676f500 100644
--- a/src/transports/transport.h
+++ b/src/transports/transport.h
@@ -54,7 +54,9 @@ class Transport {
 
   bool isLoopback() const { return m_loopback; }
 
-  void SetupEnablePin() {}
+  virtual void SetupEnablePin() {}
+
+  virtual void SetColor(uint8_t color) {}
 
  protected:
   uint8_t m_type = USB;

From 0142f4118b59eb5f4b07d99bf7d869559e521b6e Mon Sep 17 00:00:00 2001
From: Markus Kalkbrenner <git@kalki.de>
Date: Thu, 18 Dec 2025 14:47:13 +0100
Subject: [PATCH 05/27] reduced the load of the irq handler

---
 src/main.cpp                     | 35 +++++++++++++++------
 src/transports/spi_transport.cpp | 53 ++++++++++++++++----------------
 src/transports/spi_transport.h   | 10 +++---
 src/transports/transport.h       |  4 ---
 4 files changed, 57 insertions(+), 45 deletions(-)

diff --git a/src/main.cpp b/src/main.cpp
index a3deb45..4c59858 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -138,6 +138,7 @@ uint8_t panelI2sspeed = 8;
 uint8_t panelLatchBlanking = 2;
 uint8_t panelMinRefreshRate = 60;
 #ifdef DMDREADER
+bool core_0_initialized = false;
 uint8_t loopbackColor = (uint8_t)Color::ORANGE;
 
 const char *ColorString(uint8_t color) {
@@ -2161,7 +2162,7 @@ void setup() {
   }
 
 #ifdef DMDREADER
-  transport->SetColor(loopbackColor);
+  static_cast<SpiTransport *>(transport)->SetColor((Color)loopbackColor);
 #endif
   transport->init();
 
@@ -2188,6 +2189,10 @@ void setup() {
     speakerLightsRight->start();
   }
 #endif
+
+#ifdef DMDREADER
+  core_0_initialized = true;
+#endif
 }
 
 void loop() {
@@ -2419,19 +2424,29 @@ void loop() {
 }
 
 #ifdef DMDREADER
+
+void setup1() {
+  while (!core_0_initialized) {
+    tight_loop_contents();
+  }
+
+  static_cast<SpiTransport *>(transport)->SetupEnablePin();
+}
+
 void loop1() {
-  //transport->SetupEnablePin();
+  if (transport) {
+    static_cast<SpiTransport *>(transport)->ProcessEnablePinEvents();
 
-  if (transport->isLoopback()) {
-    uint8_t *buffer = dmdreader_loopback_render();
-    if (buffer != nullptr) {
-      memcpy(renderBuffer[currentRenderBuffer], buffer, TOTAL_BYTES);
-      Render();
+    if (transport->isLoopback()) {
+      uint8_t *buffer = dmdreader_loopback_render();
+      if (buffer != nullptr) {
+        memcpy(renderBuffer[currentRenderBuffer], buffer, TOTAL_BYTES);
+        Render();
+      }
     } else {
-      tight_loop_contents();
+      dmdreader_spi_send();
     }
-  } else if (!dmdreader_spi_send()) {
-    tight_loop_contents();
   }
+  tight_loop_contents();
 }
 #endif
diff --git a/src/transports/spi_transport.cpp b/src/transports/spi_transport.cpp
index 6f0a95d..1f529df 100644
--- a/src/transports/spi_transport.cpp
+++ b/src/transports/spi_transport.cpp
@@ -40,15 +40,6 @@ bool SpiTransport::init() {
 bool SpiTransport::deinit() {
   if (m_active) {
     m_active = false;
-#ifdef DMDREADER
-    if (m_irqInitialized) {
-      gpio_set_irq_enabled(kEnablePin, GPIO_IRQ_EDGE_RISE | GPIO_IRQ_EDGE_FALL,
-                           false);
-      m_irqInitialized = false;
-      s_instance = nullptr;
-    }
-    disableSpiStateMachine();
-#endif
     // TODO ? clean exit ?
     // delay(500);
     // vTaskDelete(m_task);
@@ -145,15 +136,11 @@ void SpiTransport::switchToSpiMode() {
   headerBytesReceived = 0;
   numCtrlCharsFound = 0;
   transportActive = false;
-  enableSpiStateMachine();
 }
 
 void SpiTransport::onEnableRise() {
-  if (m_loopback) {
-    switchToSpiMode();
-    return;
-  }
-  if (m_transferActive) {
+  if (m_loopback) switchToSpiMode();
+  else if (m_transferActive) {
     stopDmaAndFlush();
     m_transferActive = false;
   }
@@ -161,33 +148,47 @@ void SpiTransport::onEnableRise() {
 
 void SpiTransport::onEnableFall() {
   if (m_loopback) return;
-  if (!m_transferActive) {
-    m_transferActive = true;
+  else if (!m_transferActive) {
     enableSpiStateMachine();
     startDma();
+    m_transferActive = true;
+  }
+}
+
+void SpiTransport::ProcessEnablePinEvents() {
+  if (m_enableRisePending) {
+    m_enableRisePending = false;
+    onEnableRise();
+  }
+
+  if (m_enableFallPending) {
+    m_enableFallPending = false;
+    onEnableFall();
   }
 }
 
 void SpiTransport::gpio_irq_handler(uint gpio, uint32_t events) {
   if (!s_instance || gpio != kEnablePin) return;
   if (events & GPIO_IRQ_EDGE_RISE) {
-    s_instance->onEnableRise();
+    s_instance->m_enableRisePending = true;
   }
   if (events & GPIO_IRQ_EDGE_FALL) {
-    s_instance->onEnableFall();
+    s_instance->m_enableFallPending = true;
   }
 }
 
 void SpiTransport::SetupEnablePin() {
+  m_enableRisePending = false;
+  m_enableFallPending = false;
+
   // Initialize GPIO IRQ from core1 (loop1) so callbacks run on core1.
-  if (!m_irqInitialized) {
-    gpio_set_irq_enabled_with_callback(kEnablePin,
-                                       GPIO_IRQ_EDGE_RISE | GPIO_IRQ_EDGE_FALL,
-                                       true, &SpiTransport::gpio_irq_handler);
-    m_irqInitialized = true;
-  }
+  gpio_acknowledge_irq(kEnablePin,
+                       GPIO_IRQ_EDGE_RISE | GPIO_IRQ_EDGE_FALL);  // clear stale
+  gpio_set_irq_enabled_with_callback(kEnablePin,
+                                     GPIO_IRQ_EDGE_RISE | GPIO_IRQ_EDGE_FALL,
+                                     true, &SpiTransport::gpio_irq_handler);
 }
 
-void SpiTransport::SetColor(uint8_t color) { m_color = (Color)color; }
+void SpiTransport::SetColor(Color color) { m_color = color; }
 
 #endif
diff --git a/src/transports/spi_transport.h b/src/transports/spi_transport.h
index f20a27f..f48bc2d 100644
--- a/src/transports/spi_transport.h
+++ b/src/transports/spi_transport.h
@@ -25,12 +25,11 @@ class SpiTransport final : public Transport {
   bool deinit() override;
 
 #ifdef DMDREADER
-  void SetupEnablePin() override;
-  void SetColor(uint8_t color) override;
-#endif
+  void SetupEnablePin();
+  void SetColor(Color color);
+  void ProcessEnablePinEvents();
 
  private:
-#ifdef DMDREADER
   void initPio();
   void enableSpiStateMachine();
   void disableSpiStateMachine();
@@ -56,10 +55,11 @@ class SpiTransport final : public Transport {
   bool m_spiEnabled = false;
   bool m_transferActive = false;
   bool m_dmaRunning = false;
-  bool m_irqInitialized = false;
   uint8_t m_rxBuffer[kRxBufferSize];
   size_t m_rxBufferPos = 0;
   Color m_color = Color::ORANGE;
+  volatile bool m_enableRisePending = false;
+  volatile bool m_enableFallPending = false;
 #endif
 };
 
diff --git a/src/transports/transport.h b/src/transports/transport.h
index 676f500..c45dece 100644
--- a/src/transports/transport.h
+++ b/src/transports/transport.h
@@ -54,10 +54,6 @@ class Transport {
 
   bool isLoopback() const { return m_loopback; }
 
-  virtual void SetupEnablePin() {}
-
-  virtual void SetColor(uint8_t color) {}
-
  protected:
   uint8_t m_type = USB;
   bool m_active = false;

From 585b8f9646a3bf8d4d8546fd85e5c0889cd39cdb Mon Sep 17 00:00:00 2001
From: Markus Kalkbrenner <git@kalki.de>
Date: Thu, 18 Dec 2025 17:53:32 +0100
Subject: [PATCH 06/27] improved double buffering

---
 platformio.ini                 |  2 +-
 src/displays/LedMatrix.cpp     | 10 -------
 src/displays/PicoLedMatrix.cpp | 16 ----------
 src/main.cpp                   | 54 +++++++++++++++++++++++++++-------
 4 files changed, 45 insertions(+), 37 deletions(-)

diff --git a/platformio.ini b/platformio.ini
index c395ba2..76b0a41 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -195,7 +195,7 @@ board_build.filesystem_size = 3.5m
 lib_deps =
     thomasfredericks/Bounce2
     https://github.com/PPUC/pimoroni-pico#0002c1d20a8a6c79c6a4125fe34f12815b0e2f2c
-    https://github.com/PPUC/dmdreader#a1b4c4debeca31488c0c6db42588f7df3f701d17
+    https://github.com/PPUC/dmdreader#3d8b050d33fdc25276ed70700f30ac5c2f3c1ada
 lib_ignore =
     WiFi
     AsyncUDP
diff --git a/src/displays/LedMatrix.cpp b/src/displays/LedMatrix.cpp
index 5b5bbcf..a578f1f 100644
--- a/src/displays/LedMatrix.cpp
+++ b/src/displays/LedMatrix.cpp
@@ -57,8 +57,6 @@ void LedMatrix::DisplayText(const char *text, uint16_t x, uint16_t y, uint8_t r,
       }
     }
   }
-
-  Render();
 }
 
 void IRAM_ATTR LedMatrix::FillZoneRaw(uint8_t idx, uint8_t *pBuffer) {
@@ -73,8 +71,6 @@ void IRAM_ATTR LedMatrix::FillZoneRaw(uint8_t idx, uint8_t *pBuffer) {
                 pBuffer[pos + 1], pBuffer[pos + 2]);
     }
   }
-
-  Render();
 }
 
 void IRAM_ATTR LedMatrix::FillZoneRaw565(uint8_t idx, uint8_t *pBuffer) {
@@ -88,8 +84,6 @@ void IRAM_ATTR LedMatrix::FillZoneRaw565(uint8_t idx, uint8_t *pBuffer) {
                 (((uint16_t)pBuffer[pos + 1]) << 8) + pBuffer[pos]);
     }
   }
-
-  Render();
 }
 
 void IRAM_ATTR LedMatrix::ClearZone(uint8_t idx) {
@@ -101,8 +95,6 @@ void IRAM_ATTR LedMatrix::ClearZone(uint8_t idx) {
       DrawPixel(x + zoneXOffset, y + zoneYOffset, 0, 0, 0);
     }
   }
-
-  Render();
 }
 
 void IRAM_ATTR LedMatrix::FillPanelRaw(uint8_t *pBuffer) {
@@ -115,8 +107,6 @@ void IRAM_ATTR LedMatrix::FillPanelRaw(uint8_t *pBuffer) {
       DrawPixel(x, y, pBuffer[pos], pBuffer[pos + 1], pBuffer[pos + 2]);
     }
   }
-
-  Render();
 }
 
 void LedMatrix::Render() {}
diff --git a/src/displays/PicoLedMatrix.cpp b/src/displays/PicoLedMatrix.cpp
index 2bd0a8f..320f10e 100644
--- a/src/displays/PicoLedMatrix.cpp
+++ b/src/displays/PicoLedMatrix.cpp
@@ -2,7 +2,6 @@
 
 #include "PicoLedMatrix.h"
 
-#include <SerialUART.h>
 #include <hardware/vreg.h>
 
 #include "pico/zedmd_pico.h"
@@ -48,21 +47,6 @@ static uint16_t lut_table[256] = {
     1023};
 
 PicoLedMatrix::PicoLedMatrix() {
-  // tested working on a lot of different devices
-  vreg_set_voltage(VREG_VOLTAGE_1_15);
-  busy_wait_at_least_cycles((SYS_CLK_VREG_VOLTAGE_AUTO_ADJUST_DELAY_US *
-                             static_cast<uint64_t>(XOSC_HZ)) /
-                            1000000);
-  set_sys_clock_khz(266000, false);
-
-#if 0
-  // serial needs to be inited after oc
-  Serial1.setTX(16);
-  Serial1.setRX(17);
-  Serial1.begin();
-  Serial1.println("PicoLedMatrix");
-#endif
-
   // rgb565 > rgb888 "fast" pixel conversion
   init_rgb_tables();
 
diff --git a/src/main.cpp b/src/main.cpp
index 4c59858..bcce653 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -153,8 +153,8 @@ const char *ColorString(uint8_t color) {
       return "green ";
     case Color::BLUE:
       return "blue  ";
-    case Color::VIOLET:
-      return "violet";
+    case Color::PURPLE:
+      return "purple";
     case Color::PINK:
       return "pink  ";
     case Color::WHITE:
@@ -202,12 +202,14 @@ void DoRestart(int sec) {
   }
   display->ClearScreen();
   display->DisplayText("Restarting ...", 0, 0, 255, 0, 0);
+  display->Render();
 #ifndef DMDREADER
   vTaskDelay(pdMS_TO_TICKS(sec * 1000));
 #else
   delay(1000);
 #endif
   display->ClearScreen();
+  display->Render();
   delay(20);
 
 #ifdef PICO_BUILD
@@ -661,15 +663,19 @@ void LoadSpeakerLightsSettings() {
 
 void LedTester(void) {
   display->FillScreen(255, 0, 0);
+  display->Render();
   delay(LED_CHECK_DELAY);
 
   display->FillScreen(0, 255, 0);
+  display->Render();
   delay(LED_CHECK_DELAY);
 
   display->FillScreen(0, 0, 255);
+  display->Render();
   delay(LED_CHECK_DELAY);
 
   display->ClearScreen();
+  display->Render();
 }
 
 void AcquireNextBuffer() {
@@ -720,7 +726,6 @@ uint16_t frames = 0;
 char fpsStr[3];
 
 void FpsUpdate() {
-  // if (debug) {
   frames++;
 
   if (fpsClock.getElapsedTime().asMilliseconds() >= 200) {
@@ -731,7 +736,7 @@ void FpsUpdate() {
 
   display->DisplayText(fpsStr, TOTAL_WIDTH - 7, TOTAL_HEIGHT - 5, 255, 0, 0,
                        false, false);
-  //}
+  display->Render();
 }
 #endif
 
@@ -739,7 +744,7 @@ uint8_t GetPixelBrightness(uint8_t r, uint8_t g, uint8_t b) {
   return (r * 77 + g * 150 + b * 29) >> 8;  // Optimized luminance calculation
 }
 
-void Render() {
+void Render(bool renderAll = true) {
   if (NUM_RENDER_BUFFERS == 1) {
     display->FillPanelRaw(renderBuffer[currentRenderBuffer]);
   } else if (currentRenderBuffer != lastRenderBuffer) {
@@ -797,7 +802,7 @@ void Render() {
       }
     }
 
-    display->Render();
+    if (renderAll) display->Render();
 
 #ifdef SPEAKER_LIGHTS
     if (FX_MODE_AMBILIGHT == speakerLightsLeftMode) {
@@ -859,7 +864,7 @@ void ClearScreen() {
   }
 }
 
-void DisplayLogo(void) {
+void DisplayLogo() {
   File f;
 
   if (TOTAL_HEIGHT == 64) {
@@ -893,7 +898,7 @@ void DisplayLogo(void) {
 #endif
   f.close();
 
-  Render();
+  Render(false);
   DisplayVersion(true);
 
   throbberColors[0] = 0;
@@ -1050,6 +1055,7 @@ uint8_t HandleData(uint8_t *pData, size_t len) {
                                  0, 0);
             DisplayNumber(payloadSize, 5, 0, 19, 255, 0, 0);
             DisplayNumber(BUFFER_SIZE, 5, 0, 25, 255, 0, 0);
+            display->Render();
             while (1);
           }
           headerBytesReceived = 0;
@@ -1066,6 +1072,7 @@ uint8_t HandleData(uint8_t *pData, size_t len) {
                                (TOTAL_HEIGHT / 2) - 4, 128, 128, 128);
           DisplayNumber(payloadSize, 2, 7 * (TOTAL_WIDTH / 128) + (8 * 4),
                         (TOTAL_HEIGHT / 2) - 4, 255, 191, 0);
+          display->Render();
         }
 
         bool rgb888ZoneStream = false;
@@ -1306,6 +1313,7 @@ uint8_t HandleData(uint8_t *pData, size_t len) {
               Serial.flush();
             }
             display->DisplayText("Saving settings ...", 0, 0, 255, 0, 0);
+            display->Render();
             SaveLum();
             SaveDebug();
             SaveTransport();
@@ -1322,6 +1330,7 @@ uint8_t HandleData(uint8_t *pData, size_t len) {
             SaveYOffset();
 #endif
             display->DisplayText("Saving settings ... done", 0, 0, 255, 0, 0);
+            display->Render();
             headerBytesReceived = 0;
             numCtrlCharsFound = 0;
             if (transport->isWifiAndActive()) break;
@@ -1634,6 +1643,7 @@ uint8_t HandleData(uint8_t *pData, size_t len) {
               display->DisplayText("KEEP ALIVE RECEIVED",
                                    7 * (TOTAL_WIDTH / 128),
                                    (TOTAL_HEIGHT / 2) - 10, 128, 128, 128);
+              display->Render();
             }
             lastDataReceivedClock.restart();
             headerBytesReceived = 0;
@@ -1737,6 +1747,15 @@ void setup() {
 #ifndef PICO_BUILD
   esp_log_level_set("*", ESP_LOG_NONE);
 #else
+  /*
+  // tested working on a lot of different devices
+  vreg_set_voltage(VREG_VOLTAGE_1_15);
+  busy_wait_at_least_cycles((SYS_CLK_VREG_VOLTAGE_AUTO_ADJUST_DELAY_US *
+                             static_cast<uint64_t>(XOSC_HZ)) /
+                            1000000);
+  set_sys_clock_khz(266000, false);
+  */
+
   // overclock to achieve higher SPI transfer speed
   set_sys_clock_khz(SYS_CLK_MHZ * 1000, true);
 #endif
@@ -1823,6 +1842,7 @@ void setup() {
   if (!fileSystemOK) {
     display->DisplayText("Error reading file system!", 0, 0, 255, 0, 0);
     display->DisplayText("Try to flash the firmware again.", 0, 6, 255, 0, 0);
+    display->Render();
     while (true);
   }
 
@@ -1839,9 +1859,11 @@ void setup() {
       DisplayNumber(esp_reset_reason(), 2, 16 * 4, 18, 255, 0, 0);
       if (debug) {
         display->DisplayText("Reboot in 30 seconds ...", 0, 24, 255, 0, 0);
+        display->Render();
         for (uint8_t i = 29; i > 0; i--) {
           delay(1000);
           DisplayNumber(i, 2, 40, 24, 255, 0, 0);
+          display->Render();
         }
         Restart();
       }
@@ -1853,9 +1875,11 @@ void setup() {
       display->DisplayText("Check your power supply and", 0, 6, 255, 0, 0);
       display->DisplayText("hardware.", 0, 12, 255, 0, 0);
       display->DisplayText("Reboot in 30 seconds ...", 0, 24, 255, 0, 0);
+      display->Render();
       for (uint8_t i = 29; i > 0; i--) {
         delay(1000);
         DisplayNumber(i, 2, 40, 24, 255, 0, 0);
+        display->Render();
       }
       Restart();
       break;
@@ -1874,6 +1898,7 @@ void setup() {
 #endif
     if (nullptr == renderBuffer[i]) {
       display->DisplayText("out of memory", 0, 0, 255, 0, 0);
+      display->Render();
       while (1);
     }
     memset(renderBuffer[i], 0, TOTAL_BYTES);
@@ -1915,6 +1940,7 @@ void setup() {
 #endif
 
     uint8_t position = 1;
+    bool firstMenuRendering = true;
     while (1) {
       forwardButton->update();
       const bool forward = forwardButton->pressed();
@@ -1923,7 +1949,8 @@ void setup() {
       backwardButton->update();
       backward = backwardButton->pressed();
 #endif
-      if (forward || backward) {
+      bool buttonPressed = forward || backward;
+      if (buttonPressed) {
         if (forward && ++position > MENU_ITEMS_COUNT)
           position = 1;
         else if (backward && --position < 1)
@@ -2008,6 +2035,7 @@ void setup() {
       downButton->update();
       down = downButton->pressed();
 #endif
+      buttonPressed = buttonPressed || up || down;
       if (up || down) {
         switch (position) {
           case 1: {  // Exit
@@ -2130,7 +2158,10 @@ void setup() {
 #endif
         }
       }
-
+      if (buttonPressed || firstMenuRendering) {
+        firstMenuRendering = false;
+        display->Render();
+      }
       delay(1);
     }
   }
@@ -2146,6 +2177,7 @@ void setup() {
 
   DisplayLogo();
   DisplayId();
+  display->Render();
 
   // Create synchronization primitives
   for (uint8_t i = 0; i < NUM_BUFFERS; i++) {
@@ -2157,6 +2189,7 @@ void setup() {
 #endif
     if (nullptr == buffers[i]) {
       display->DisplayText("out of memory", 0, 0, 255, 0, 0);
+      display->Render();
       while (1);
     }
   }
@@ -2328,6 +2361,7 @@ void loop() {
               display->DisplayText("miniz error: ", 0, 0, 255, 0, 0);
               DisplayNumber(minizStatus, 3, 13 * 4, 0, 255, 0, 0);
               display->DisplayText("free heap: ", 0, 6, 255, 0, 0);
+              display->Render();
 #ifdef PICO_BUILD
               DisplayNumber(rp2040.getFreeHeap(), 8, 11 * 4, 6, 255, 0, 0);
 #else

From e550ae1f29c710ad8ee30e9f03f3850c12f6dd39 Mon Sep 17 00:00:00 2001
From: Markus Kalkbrenner <git@kalki.de>
Date: Thu, 18 Dec 2025 21:18:52 +0100
Subject: [PATCH 07/27] switched to different lib

---
 platformio.ini                 | 24 +++++--------
 src/displays/PicoLedMatrix.cpp | 61 +++++++++++-----------------------
 src/displays/PicoLedMatrix.h   | 19 ++++++-----
 3 files changed, 38 insertions(+), 66 deletions(-)

diff --git a/platformio.ini b/platformio.ini
index 76b0a41..10613e4 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -135,7 +135,7 @@ board_build.arduino.earlephilhower.usb_pid = 0x1001
 lib_deps =
     thomasfredericks/Bounce2
     https://github.com/Cpasjuste/Adafruit_TinyUSB_Arduino#zedmd
-    https://github.com/PPUC/pimoroni-pico#0002c1d20a8a6c79c6a4125fe34f12815b0e2f2c
+    https://github.com/PPUC/hub75#88aa0f394a695c05259bbfa1f18c5522409fc841
 lib_ignore =
     SPI
     WiFi
@@ -194,7 +194,7 @@ board_build.filesystem = littlefs
 board_build.filesystem_size = 3.5m
 lib_deps =
     thomasfredericks/Bounce2
-    https://github.com/PPUC/pimoroni-pico#0002c1d20a8a6c79c6a4125fe34f12815b0e2f2c
+    https://github.com/PPUC/hub75#88aa0f394a695c05259bbfa1f18c5522409fc841
     https://github.com/PPUC/dmdreader#3d8b050d33fdc25276ed70700f30ac5c2f3c1ada
 lib_ignore =
     WiFi
@@ -215,18 +215,10 @@ build_flags =
     -DRP2350 ; needed for dmdreader
     -DPICO_RP2350
     -DPICO_RP2350A=0 ; Not RP2350A means RP2350B
-    -DHUB75_R0=30
-    -DHUB75_G0=31
-    -DHUB75_B0=32
-    -DHUB75_R1=33
-    -DHUB75_G1=34
-    -DHUB75_B1=35
-    -DHUB75_A=36
-    -DHUB75_B=37
-    -DHUB75_C=38
-    -DHUB75_D=39
-    -DHUB75_E=40
-    -DHUB75_CLK=41
-    -DHUB75_LAT=42
-    -DHUB75_OE=43
+    -DDATA_BASE_PIN=30
+    -DROWSEL_BASE_PIN=36
+    -DCLK_PIN=41
+    -DSTROBE_PIN=42
+    -DOEN_PIN=43
+    -DHUB75_MULTIPLEX_2_ROWS=1
 build_unflags = -Og
diff --git a/src/displays/PicoLedMatrix.cpp b/src/displays/PicoLedMatrix.cpp
index 320f10e..70bcd7f 100644
--- a/src/displays/PicoLedMatrix.cpp
+++ b/src/displays/PicoLedMatrix.cpp
@@ -2,15 +2,8 @@
 
 #include "PicoLedMatrix.h"
 
-#include <hardware/vreg.h>
-
 #include "pico/zedmd_pico.h"
 
-static pimoroni::Hub75 *s_hub75;
-
-// interrupt callback required function
-static void __isr dma_complete() { s_hub75->dma_complete(); }
-
 static uint8_t r5_to_8[32];
 static uint8_t g6_to_8[64];
 static uint8_t b5_to_8[32];
@@ -26,61 +19,45 @@ static void init_rgb_tables() {
   }
 }
 
-static uint16_t lut_table[256] = {
-    0,   0,   1,   1,   1,   2,   2,   3,   4,   5,   5,   6,   7,   8,    9,
-    10,  11,  12,  13,  14,  15,  17,  18,  19,  20,  22,  23,  24,  26,   27,
-    29,  30,  32,  33,  35,  36,  38,  39,  41,  43,  44,  46,  48,  50,   51,
-    53,  55,  57,  59,  60,  62,  64,  66,  68,  70,  72,  74,  76,  78,   80,
-    82,  84,  87,  89,  91,  93,  95,  98,  100, 102, 104, 107, 109, 112,  114,
-    116, 119, 121, 124, 126, 129, 131, 134, 136, 139, 142, 144, 147, 150,  152,
-    155, 158, 161, 163, 166, 169, 172, 175, 178, 181, 184, 187, 190, 193,  196,
-    199, 202, 205, 208, 211, 214, 218, 221, 224, 227, 231, 234, 237, 241,  244,
-    248, 251, 254, 258, 262, 265, 269, 272, 276, 280, 283, 287, 291, 295,  298,
-    302, 306, 310, 314, 318, 322, 326, 330, 334, 338, 342, 346, 350, 354,  359,
-    363, 367, 372, 376, 380, 385, 389, 394, 398, 403, 407, 412, 416, 421,  426,
-    431, 435, 440, 445, 450, 455, 460, 465, 470, 475, 480, 485, 490, 495,  500,
-    506, 511, 516, 522, 527, 532, 538, 543, 549, 555, 560, 566, 572, 577,  583,
-    589, 595, 601, 607, 613, 619, 625, 631, 637, 643, 649, 656, 662, 668,  675,
-    681, 688, 694, 701, 708, 714, 721, 728, 735, 741, 748, 755, 762, 769,  776,
-    784, 791, 798, 805, 813, 820, 828, 835, 843, 850, 858, 866, 874, 881,  889,
-    897, 905, 913, 921, 929, 938, 946, 954, 963, 971, 980, 988, 997, 1005, 1014,
-    1023};
-
 PicoLedMatrix::PicoLedMatrix() {
   // rgb565 > rgb888 "fast" pixel conversion
   init_rgb_tables();
 
-  s_hub75 = new pimoroni::Hub75(
-      TOTAL_WIDTH, PANEL_HEIGHT, nullptr, pimoroni::PANEL_FM6126A, false,
-      static_cast<pimoroni::Hub75::COLOR_ORDER>(color_order[rgbMode]),
-      lut_table);
-  s_hub75->start(dma_complete);
+  create_hub75_driver(TOTAL_WIDTH, PANEL_HEIGHT, PanelType::PANEL_FM6126A,
+                      false);
+  start_hub75_driver();
 }
 
-PicoLedMatrix::~PicoLedMatrix() {
-  s_hub75->stop(dma_complete);
-  delete s_hub75;
-}
+PicoLedMatrix::~PicoLedMatrix() {}
 
 void IRAM_ATTR PicoLedMatrix::DrawPixel(const uint16_t x, const uint16_t y,
                                         const uint8_t r, const uint8_t g,
                                         const uint8_t b) {
-  s_hub75->set_pixel(x, y + yOffset, r, g, b);
+  uint16_t pos = ((y + yOffset) * TOTAL_WIDTH + x) * 3;
+  drawBuffer[pos] = b;
+  drawBuffer[++pos] = g;
+  drawBuffer[++pos] = r;
 }
 
 void IRAM_ATTR PicoLedMatrix::DrawPixel(const uint16_t x, const uint16_t y,
                                         const uint16_t color) {
-  s_hub75->set_pixel(x, y + yOffset, r5_to_8[(color >> 11) & 0x1F],
-                     g6_to_8[(color >> 5) & 0x3F], b5_to_8[color & 0x1F]);
+  uint16_t pos = ((y + yOffset) * TOTAL_WIDTH + x) * 3;
+  drawBuffer[pos] = r5_to_8[(color >> 11) & 0x1F];
+  drawBuffer[++pos] = g6_to_8[(color >> 5) & 0x3F];
+  drawBuffer[++pos] = b5_to_8[color & 0x1F];
 }
 
-void PicoLedMatrix::ClearScreen() { s_hub75->clear(); }
+void PicoLedMatrix::ClearScreen() { memset(drawBuffer, 0, sizeof(drawBuffer)); }
 
 void PicoLedMatrix::SetBrightness(const uint8_t level) {
   // TODO: verify this (compare with an "esp board") ?
   const auto b = static_cast<uint8_t>(static_cast<float>(level) * 1.5f);
-  s_hub75->brightness = b;
+  setBasisBrightness(b);
+}
+
+void PicoLedMatrix::Render() {
+  // double buffering is handled inside the hub75 driver
+  update_bgr(drawBuffer);
 }
 
-void PicoLedMatrix::Render() { s_hub75->render(); }
 #endif  // PICO_BUILD
diff --git a/src/displays/PicoLedMatrix.h b/src/displays/PicoLedMatrix.h
index afbc5a9..9a6c68f 100644
--- a/src/displays/PicoLedMatrix.h
+++ b/src/displays/PicoLedMatrix.h
@@ -2,7 +2,7 @@
 #define PICO_LED_MATRIX_H
 
 #include "LedMatrix.h"
-#include "hub75.hpp"
+#include <hub75.hpp>
 
 class PicoLedMatrix final : public LedMatrix {
  public:
@@ -18,13 +18,16 @@ class PicoLedMatrix final : public LedMatrix {
   void Render() override;
 
  private:
-  uint8_t color_order[6] = {
-      static_cast<uint8_t>(pimoroni::Hub75::COLOR_ORDER::RGB),
-      static_cast<uint8_t>(pimoroni::Hub75::COLOR_ORDER::BRG),
-      static_cast<uint8_t>(pimoroni::Hub75::COLOR_ORDER::GBR),
-      static_cast<uint8_t>(pimoroni::Hub75::COLOR_ORDER::RBG),
-      static_cast<uint8_t>(pimoroni::Hub75::COLOR_ORDER::GRB),
-      static_cast<uint8_t>(pimoroni::Hub75::COLOR_ORDER::BGR)};
+  /*
+   uint8_t color_order[6] = {
+       static_cast<uint8_t>(pimoroni::Hub75::COLOR_ORDER::RGB),
+       static_cast<uint8_t>(pimoroni::Hub75::COLOR_ORDER::BRG),
+       static_cast<uint8_t>(pimoroni::Hub75::COLOR_ORDER::GBR),
+       static_cast<uint8_t>(pimoroni::Hub75::COLOR_ORDER::RBG),
+       static_cast<uint8_t>(pimoroni::Hub75::COLOR_ORDER::GRB),
+       static_cast<uint8_t>(pimoroni::Hub75::COLOR_ORDER::BGR)};
+ */
+  uint8_t drawBuffer[TOTAL_WIDTH * PANEL_HEIGHT * 3];
 };
 
 #endif  // PICO_LED_MATRIX_H

From cfe1c034a33d10c2ba0c3cc8ad3c9dcb7951369b Mon Sep 17 00:00:00 2001
From: Markus Kalkbrenner <git@kalki.de>
Date: Thu, 18 Dec 2025 22:15:44 +0100
Subject: [PATCH 08/27] fixed pico

---
 platformio.ini | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/platformio.ini b/platformio.ini
index 10613e4..26c8a4d 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -169,6 +169,7 @@ extends = pico
 board = pico
 build_flags = ${pico.build_flags}
     -DZEDMD_HD=1
+    -DHUB75_MULTIPLEX_2_ROWS=1
 
 [env:pico2_128x32]
 extends = pico
@@ -176,6 +177,7 @@ board = rpipico2
 board_build.filesystem_size = 3.5m
 build_flags = ${pico.build_flags}
     -DBOARD_HAS_PSRAM
+    -DHUB75_MULTIPLEX_2_ROWS=1
 
 [env:pico2_256x64]
 extends = pico
@@ -184,6 +186,7 @@ board_build.filesystem_size = 3.5m
 build_flags = ${pico.build_flags}
     -DBOARD_HAS_PSRAM
     -DZEDMD_HD=1
+    -DHUB75_MULTIPLEX_2_ROWS=1
 
 [env:ppucdmd_128x32]
 platform = https://github.com/mkalkbrenner/platform-raspberrypi#issue-112

From f9188bb9e474d2bbae3020fefedea360b62d5e99 Mon Sep 17 00:00:00 2001
From: Markus Kalkbrenner <git@kalki.de>
Date: Sat, 27 Dec 2025 20:53:07 +0100
Subject: [PATCH 09/27] removed duplicate function

---
 src/main.cpp | 16 ----------------
 1 file changed, 16 deletions(-)

diff --git a/src/main.cpp b/src/main.cpp
index 5f90393..3eaf490 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -2549,20 +2549,4 @@ void loop1() {
   static_cast<SpiTransport *>(transport)->SetupEnablePin();
 }
 
-void loop1() {
-  if (transport) {
-    static_cast<SpiTransport *>(transport)->ProcessEnablePinEvents();
-
-    if (transport->isLoopback()) {
-      uint8_t *buffer = dmdreader_loopback_render();
-      if (buffer != nullptr) {
-        memcpy(renderBuffer[currentRenderBuffer], buffer, TOTAL_BYTES);
-        Render();
-      }
-    } else {
-      dmdreader_spi_send();
-    }
-  }
-  tight_loop_contents();
-}
 #endif

From a367c03b6c826a67439555525862ca99e06b1914 Mon Sep 17 00:00:00 2001
From: Markus Kalkbrenner <git@kalki.de>
Date: Sat, 27 Dec 2025 20:55:26 +0100
Subject: [PATCH 10/27] removed function

---
 src/main.cpp | 2 --
 1 file changed, 2 deletions(-)

diff --git a/src/main.cpp b/src/main.cpp
index 3eaf490..e0ed16d 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -2545,8 +2545,6 @@ void loop1() {
   } else {
     delay(1);
   }
-
-  static_cast<SpiTransport *>(transport)->SetupEnablePin();
 }
 
 #endif

From b33a55803b3d7f065d04dbe1953daddf3494a928 Mon Sep 17 00:00:00 2001
From: Markus Kalkbrenner <git@kalki.de>
Date: Sun, 25 Jan 2026 17:03:16 +0100
Subject: [PATCH 11/27] fixed compile issues

---
 platformio.ini                 | 2 +-
 src/displays/PicoLedMatrix.cpp | 3 +--
 2 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/platformio.ini b/platformio.ini
index f97c62c..cb47d93 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -239,8 +239,8 @@ board_build.filesystem = littlefs
 board_build.filesystem_size = 1.5m
 lib_deps =
     thomasfredericks/Bounce2
-    https://github.com/PPUC/hub75#e18a897de981bf59803f2218a3a7fb8f0a631245
     https://github.com/PPUC/dmdreader#c627fbe48d67f094e4a59ecbea8bc4319e97a6d0
+    https://github.com/PPUC/hub75#0e629f9fff855f026b2cd1def187f3cbca4069c0
 lib_ignore =
     WiFi
     AsyncUDP
diff --git a/src/displays/PicoLedMatrix.cpp b/src/displays/PicoLedMatrix.cpp
index 6f51647..a2f412a 100644
--- a/src/displays/PicoLedMatrix.cpp
+++ b/src/displays/PicoLedMatrix.cpp
@@ -23,8 +23,7 @@ PicoLedMatrix::PicoLedMatrix() {
   // rgb565 > rgb888 "fast" pixel conversion
   init_rgb_tables();
 
-  create_hub75_driver(TOTAL_WIDTH, PANEL_HEIGHT, PanelType::PANEL_RUL6024,
-                      false);
+  create_hub75_driver(TOTAL_WIDTH, PANEL_HEIGHT, PANEL_RUL6024, false);
   start_hub75_driver();
 }
 

From ff373b7422094e2c509bb88479368c4baa4481d5 Mon Sep 17 00:00:00 2001
From: Markus Kalkbrenner <git@kalki.de>
Date: Sun, 25 Jan 2026 17:26:00 +0100
Subject: [PATCH 12/27] fixed build

---
 platformio.ini | 36 ++++++++++++++++++++----------------
 1 file changed, 20 insertions(+), 16 deletions(-)

diff --git a/platformio.ini b/platformio.ini
index cb47d93..c24ec2b 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -135,7 +135,7 @@ board_build.arduino.earlephilhower.usb_pid = 0x1001
 lib_deps =
     thomasfredericks/Bounce2
     https://github.com/Cpasjuste/Adafruit_TinyUSB_Arduino#zedmd
-    https://github.com/PPUC/hub75#88aa0f394a695c05259bbfa1f18c5522409fc841
+    https://github.com/PPUC/hub75#0e629f9fff855f026b2cd1def187f3cbca4069c0
 lib_ignore =
     SPI
     WiFi
@@ -214,22 +214,27 @@ board = rpipico2
 build_flags = ${pico.build_flags}
     -DBOARD_HAS_PSRAM
     -DZEDMD_HD=1
+    -DZEDMD_NO_NETWORKING=1
+    -DNO_PICO_GRAPHICS=1
+    -DDISPLAY_LED_MATRIX=1
+    -DMINIZ_NO_STDIO=1
+    -DMINIZ_NO_TIME=1
+    -DMINIZ_NO_DEFLATE_APIS=1
+    -DMINIZ_NO_ARCHIVE_APIS=1
+    -DMINIZ_NO_ZLIB_COMPATIBLE_NAMES=1
+    -Wl,-Map,${BUILD_DIR}/firmware.map
+    -Os
+    -DRP2350 ; needed for dmdreader
     -DPICO_RP2350
     -DPICO_RP2350A=0 ; Not RP2350A means RP2350B
-    -DHUB75_R0=30
-    -DHUB75_G0=31
-    -DHUB75_B0=32
-    -DHUB75_R1=33
-    -DHUB75_G1=34
-    -DHUB75_B1=35
-    -DHUB75_A=36
-    -DHUB75_B=37
-    -DHUB75_C=38
-    -DHUB75_D=39
-    -DHUB75_E=40
-    -DHUB75_CLK=41
-    -DHUB75_LAT=42
-    -DHUB75_OE=43
+    -DDATA_BASE_PIN=30
+    -DROWSEL_BASE_PIN=36
+    -DCLK_PIN=41
+    -DSTROBE_PIN=42
+    -DOEN_PIN=43
+    -DHUB75_CLK2=44
+    -DHUB75_LAT2=45
+    -DHUB75_OE2=46
 
 [ppucdmd]
 platform = https://github.com/mkalkbrenner/platform-raspberrypi#issue-112
@@ -265,7 +270,6 @@ build_flags =
     -DCLK_PIN=41
     -DSTROBE_PIN=42
     -DOEN_PIN=43
-    -DHUB75_MULTIPLEX_2_ROWS=1
 build_unflags = -Og
 
 [env:ppucdmd_128x32]

From a87b6f077421ee6296393ed6ce8c0d48ad295c05 Mon Sep 17 00:00:00 2001
From: Markus Kalkbrenner <git@kalki.de>
Date: Sun, 25 Jan 2026 18:05:27 +0100
Subject: [PATCH 13/27] HUB75_MULTIPLEX_4_ROWS

---
 platformio.ini | 1 +
 1 file changed, 1 insertion(+)

diff --git a/platformio.ini b/platformio.ini
index c24ec2b..2322f64 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -235,6 +235,7 @@ build_flags = ${pico.build_flags}
     -DHUB75_CLK2=44
     -DHUB75_LAT2=45
     -DHUB75_OE2=46
+    -DHUB75_MULTIPLEX_4_ROWS=1
 
 [ppucdmd]
 platform = https://github.com/mkalkbrenner/platform-raspberrypi#issue-112

From f8585a7e20a02fc2a443fc5222949ff1d5547e20 Mon Sep 17 00:00:00 2001
From: Markus Kalkbrenner <git@kalki.de>
Date: Sun, 25 Jan 2026 18:16:54 +0100
Subject: [PATCH 14/27] changed setting

---
 platformio.ini | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/platformio.ini b/platformio.ini
index 2322f64..35e294a 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -213,7 +213,7 @@ extends = pico
 board = rpipico2
 build_flags = ${pico.build_flags}
     -DBOARD_HAS_PSRAM
-    -DZEDMD_HD=1
+    -DZEDMD_HD_HALF=1
     -DZEDMD_NO_NETWORKING=1
     -DNO_PICO_GRAPHICS=1
     -DDISPLAY_LED_MATRIX=1
@@ -235,7 +235,7 @@ build_flags = ${pico.build_flags}
     -DHUB75_CLK2=44
     -DHUB75_LAT2=45
     -DHUB75_OE2=46
-    -DHUB75_MULTIPLEX_4_ROWS=1
+    -DHUB75_MULTIPLEX_2_ROWS=1
 
 [ppucdmd]
 platform = https://github.com/mkalkbrenner/platform-raspberrypi#issue-112

From 6a690aa8f6d210fbfa07e5113377a5090500bdca Mon Sep 17 00:00:00 2001
From: Markus Kalkbrenner <git@kalki.de>
Date: Sun, 25 Jan 2026 18:26:57 +0100
Subject: [PATCH 15/27] HUB75_P3_1415_16S_64X64_S31

---
 platformio.ini | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/platformio.ini b/platformio.ini
index 35e294a..8c7cb6b 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -213,7 +213,7 @@ extends = pico
 board = rpipico2
 build_flags = ${pico.build_flags}
     -DBOARD_HAS_PSRAM
-    -DZEDMD_HD_HALF=1
+    -DZEDMD_HD=1
     -DZEDMD_NO_NETWORKING=1
     -DNO_PICO_GRAPHICS=1
     -DDISPLAY_LED_MATRIX=1
@@ -235,7 +235,7 @@ build_flags = ${pico.build_flags}
     -DHUB75_CLK2=44
     -DHUB75_LAT2=45
     -DHUB75_OE2=46
-    -DHUB75_MULTIPLEX_2_ROWS=1
+    -DHUB75_P3_1415_16S_64X64_S31=1
 
 [ppucdmd]
 platform = https://github.com/mkalkbrenner/platform-raspberrypi#issue-112

From c17f27cc2205aae86809d9fc8b0618b5e8561f83 Mon Sep 17 00:00:00 2001
From: Markus Kalkbrenner <git@kalki.de>
Date: Sun, 25 Jan 2026 20:47:35 +0100
Subject: [PATCH 16/27] HUB75_P10_3535_16X32_4S

---
 platformio.ini | 4 ++--
 src/main.cpp   | 4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/platformio.ini b/platformio.ini
index 8c7cb6b..02b95fa 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -213,7 +213,7 @@ extends = pico
 board = rpipico2
 build_flags = ${pico.build_flags}
     -DBOARD_HAS_PSRAM
-    -DZEDMD_HD=1
+    -DZEDMD_HD_HALF=1
     -DZEDMD_NO_NETWORKING=1
     -DNO_PICO_GRAPHICS=1
     -DDISPLAY_LED_MATRIX=1
@@ -235,7 +235,7 @@ build_flags = ${pico.build_flags}
     -DHUB75_CLK2=44
     -DHUB75_LAT2=45
     -DHUB75_OE2=46
-    -DHUB75_P3_1415_16S_64X64_S31=1
+    -DHUB75_P10_3535_16X32_4S=1
 
 [ppucdmd]
 platform = https://github.com/mkalkbrenner/platform-raspberrypi#issue-112
diff --git a/src/main.cpp b/src/main.cpp
index a259973..aad100a 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -575,7 +575,7 @@ void LoadUsbPackageSizeMultiplier() {
 #ifdef ZEDMD_HD_HALF
 void SaveYOffset() {
   File f = LittleFS.open("/y_offset.val", "w");
-  f.write(yOffset);
+  f.write(static_cast<uint8_t>(yOffset));
   f.close();
 }
 
@@ -585,7 +585,7 @@ void LoadYOffset() {
     SaveYOffset();
     return;
   }
-  yOffset = f.read();
+  yOffset = static_cast<int8_t>(f.read());
   f.close();
 }
 #endif

From 878a3a52155d279a63bac7762c9147610e6e610a Mon Sep 17 00:00:00 2001
From: Markus Kalkbrenner <git@kalki.de>
Date: Sun, 25 Jan 2026 20:57:18 +0100
Subject: [PATCH 17/27] new test

---
 platformio.ini | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/platformio.ini b/platformio.ini
index 02b95fa..392297c 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -183,7 +183,13 @@ extends = pico
 board = rpipico2
 build_flags = ${pico.build_flags}
     -DBOARD_HAS_PSRAM
-    -DZEDMD_HD=1
+    -DZEDMD_HD_HALF=1
+    -DPICO_RP2350
+    -DDATA_BASE_PIN=0
+    -DROWSEL_BASE_PIN=6
+    -DCLK_PIN=11
+    -DSTROBE_PIN=12
+    -DOEN_PIN=13
     -DHUB75_MULTIPLEX_2_ROWS=1
 
 [env:pico2_128x32_ppucdmd]

From 1b7b6a6683f746cd6d39e6cc4c950397851e5129 Mon Sep 17 00:00:00 2001
From: Markus Kalkbrenner <git@kalki.de>
Date: Sun, 25 Jan 2026 21:04:24 +0100
Subject: [PATCH 18/27] HUB75_P3_1415_16S_64X64_S31

---
 platformio.ini | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/platformio.ini b/platformio.ini
index 392297c..89e85d5 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -190,7 +190,7 @@ build_flags = ${pico.build_flags}
     -DCLK_PIN=11
     -DSTROBE_PIN=12
     -DOEN_PIN=13
-    -DHUB75_MULTIPLEX_2_ROWS=1
+    -DHUB75_P3_1415_16S_64X64_S31=1
 
 [env:pico2_128x32_ppucdmd]
 extends = pico

From de03b116a50f4cf6791fe72229ec9283dff1c69f Mon Sep 17 00:00:00 2001
From: Markus Kalkbrenner <git@kalki.de>
Date: Sun, 25 Jan 2026 21:10:20 +0100
Subject: [PATCH 19/27] HUB75_P10_3535_16X32_4S

---
 platformio.ini | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/platformio.ini b/platformio.ini
index 89e85d5..ecfb3e1 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -190,7 +190,7 @@ build_flags = ${pico.build_flags}
     -DCLK_PIN=11
     -DSTROBE_PIN=12
     -DOEN_PIN=13
-    -DHUB75_P3_1415_16S_64X64_S31=1
+    -DHUB75_P10_3535_16X32_4S=1
 
 [env:pico2_128x32_ppucdmd]
 extends = pico

From bcad99d618ac9fdb2008e4fe65bb519b48fccab9 Mon Sep 17 00:00:00 2001
From: Markus Kalkbrenner <git@kalki.de>
Date: Sun, 25 Jan 2026 23:04:00 +0100
Subject: [PATCH 20/27] ROWSEL_N_PINS 5

---
 platformio.ini | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/platformio.ini b/platformio.ini
index ecfb3e1..d0bb3a2 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -187,10 +187,11 @@ build_flags = ${pico.build_flags}
     -DPICO_RP2350
     -DDATA_BASE_PIN=0
     -DROWSEL_BASE_PIN=6
+    -DROWSEL_N_PINS 5
     -DCLK_PIN=11
     -DSTROBE_PIN=12
     -DOEN_PIN=13
-    -DHUB75_P10_3535_16X32_4S=1
+    -DHUB75_MULTIPLEX_2_ROWS=1
 
 [env:pico2_128x32_ppucdmd]
 extends = pico

From c1a2c229f253e01f4b95dab9c5faee5bf4d840f0 Mon Sep 17 00:00:00 2001
From: Markus Kalkbrenner <git@kalki.de>
Date: Sun, 25 Jan 2026 23:27:18 +0100
Subject: [PATCH 21/27] fixed builds

---
 platformio.ini | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/platformio.ini b/platformio.ini
index d0bb3a2..833303e 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -187,7 +187,7 @@ build_flags = ${pico.build_flags}
     -DPICO_RP2350
     -DDATA_BASE_PIN=0
     -DROWSEL_BASE_PIN=6
-    -DROWSEL_N_PINS 5
+    -DROWSEL_N_PINS=5
     -DCLK_PIN=11
     -DSTROBE_PIN=12
     -DOEN_PIN=13

From 85d90c99821487e5d7fb00eb4dbcc26f4b9a0688 Mon Sep 17 00:00:00 2001
From: Markus Kalkbrenner <git@kalki.de>
Date: Mon, 26 Jan 2026 12:14:33 +0100
Subject: [PATCH 22/27] next test

---
 platformio.ini                 | 6 +++---
 src/displays/PicoLedMatrix.cpp | 2 +-
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/platformio.ini b/platformio.ini
index 833303e..093ebf1 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -135,7 +135,7 @@ board_build.arduino.earlephilhower.usb_pid = 0x1001
 lib_deps =
     thomasfredericks/Bounce2
     https://github.com/Cpasjuste/Adafruit_TinyUSB_Arduino#zedmd
-    https://github.com/PPUC/hub75#0e629f9fff855f026b2cd1def187f3cbca4069c0
+    https://github.com/PPUC/hub75#e75ce7f3d9e24efde57586bf194a1e96b79a5fe2
 lib_ignore =
     SPI
     WiFi
@@ -191,7 +191,7 @@ build_flags = ${pico.build_flags}
     -DCLK_PIN=11
     -DSTROBE_PIN=12
     -DOEN_PIN=13
-    -DHUB75_MULTIPLEX_2_ROWS=1
+    -DHUB75_LINEDECODER_SM5368=1
 
 [env:pico2_128x32_ppucdmd]
 extends = pico
@@ -253,7 +253,7 @@ board_build.filesystem_size = 1.5m
 lib_deps =
     thomasfredericks/Bounce2
     https://github.com/PPUC/dmdreader#c627fbe48d67f094e4a59ecbea8bc4319e97a6d0
-    https://github.com/PPUC/hub75#0e629f9fff855f026b2cd1def187f3cbca4069c0
+    https://github.com/PPUC/hub75#e75ce7f3d9e24efde57586bf194a1e96b79a5fe2
 lib_ignore =
     WiFi
     AsyncUDP
diff --git a/src/displays/PicoLedMatrix.cpp b/src/displays/PicoLedMatrix.cpp
index a2f412a..b379d71 100644
--- a/src/displays/PicoLedMatrix.cpp
+++ b/src/displays/PicoLedMatrix.cpp
@@ -23,7 +23,7 @@ PicoLedMatrix::PicoLedMatrix() {
   // rgb565 > rgb888 "fast" pixel conversion
   init_rgb_tables();
 
-  create_hub75_driver(TOTAL_WIDTH, PANEL_HEIGHT, PANEL_RUL6024, false);
+  create_hub75_driver(TOTAL_WIDTH, PANEL_HEIGHT, PANEL_DP3246, false);
   start_hub75_driver();
 }
 

From 235ca613bd4c5a22b818c0471e2c07079535ef1a Mon Sep 17 00:00:00 2001
From: Markus Kalkbrenner <git@kalki.de>
Date: Mon, 26 Jan 2026 18:15:53 +0100
Subject: [PATCH 23/27] test

---
 platformio.ini | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/platformio.ini b/platformio.ini
index 093ebf1..ec389f4 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -135,7 +135,7 @@ board_build.arduino.earlephilhower.usb_pid = 0x1001
 lib_deps =
     thomasfredericks/Bounce2
     https://github.com/Cpasjuste/Adafruit_TinyUSB_Arduino#zedmd
-    https://github.com/PPUC/hub75#e75ce7f3d9e24efde57586bf194a1e96b79a5fe2
+    https://github.com/PPUC/hub75#c76e6a83320c53cd04f69c29335b92274469435e
 lib_ignore =
     SPI
     WiFi
@@ -239,10 +239,7 @@ build_flags = ${pico.build_flags}
     -DCLK_PIN=41
     -DSTROBE_PIN=42
     -DOEN_PIN=43
-    -DHUB75_CLK2=44
-    -DHUB75_LAT2=45
-    -DHUB75_OE2=46
-    -DHUB75_P10_3535_16X32_4S=1
+    -DHUB75_LINEDECODER_SM5368
 
 [ppucdmd]
 platform = https://github.com/mkalkbrenner/platform-raspberrypi#issue-112
@@ -253,7 +250,7 @@ board_build.filesystem_size = 1.5m
 lib_deps =
     thomasfredericks/Bounce2
     https://github.com/PPUC/dmdreader#c627fbe48d67f094e4a59ecbea8bc4319e97a6d0
-    https://github.com/PPUC/hub75#e75ce7f3d9e24efde57586bf194a1e96b79a5fe2
+    https://github.com/PPUC/hub75#c76e6a83320c53cd04f69c29335b92274469435e
 lib_ignore =
     WiFi
     AsyncUDP

From b592c541a37ecd95a79eb1471467a67332224149 Mon Sep 17 00:00:00 2001
From: Markus Kalkbrenner <git@kalki.de>
Date: Mon, 26 Jan 2026 18:56:41 +0100
Subject: [PATCH 24/27] test

---
 platformio.ini | 1 -
 1 file changed, 1 deletion(-)

diff --git a/platformio.ini b/platformio.ini
index ec389f4..15c7ece 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -191,7 +191,6 @@ build_flags = ${pico.build_flags}
     -DCLK_PIN=11
     -DSTROBE_PIN=12
     -DOEN_PIN=13
-    -DHUB75_LINEDECODER_SM5368=1
 
 [env:pico2_128x32_ppucdmd]
 extends = pico

From 2c7c7ad84d23ab8dc4d519b8bd5e2cb826471f55 Mon Sep 17 00:00:00 2001
From: Markus Kalkbrenner <git@kalki.de>
Date: Mon, 26 Jan 2026 20:35:01 +0100
Subject: [PATCH 25/27] 1/16

---
 platformio.ini | 1 +
 1 file changed, 1 insertion(+)

diff --git a/platformio.ini b/platformio.ini
index 15c7ece..0d3bdb5 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -191,6 +191,7 @@ build_flags = ${pico.build_flags}
     -DCLK_PIN=11
     -DSTROBE_PIN=12
     -DOEN_PIN=13
+    -DHUB75_P3_1415_16S_64X64_S31=1
 
 [env:pico2_128x32_ppucdmd]
 extends = pico

From 0b4b9825524aa281d7a40baf190cefcedf1c5cd5 Mon Sep 17 00:00:00 2001
From: Markus Kalkbrenner <git@kalki.de>
Date: Mon, 26 Jan 2026 23:20:00 +0100
Subject: [PATCH 26/27] inverted clock

---
 platformio.ini | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/platformio.ini b/platformio.ini
index 0d3bdb5..182c4fe 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -135,7 +135,7 @@ board_build.arduino.earlephilhower.usb_pid = 0x1001
 lib_deps =
     thomasfredericks/Bounce2
     https://github.com/Cpasjuste/Adafruit_TinyUSB_Arduino#zedmd
-    https://github.com/PPUC/hub75#c76e6a83320c53cd04f69c29335b92274469435e
+    https://github.com/PPUC/hub75#60aab342dede78f92a252f6f9251936998b9b549
 lib_ignore =
     SPI
     WiFi
@@ -191,7 +191,6 @@ build_flags = ${pico.build_flags}
     -DCLK_PIN=11
     -DSTROBE_PIN=12
     -DOEN_PIN=13
-    -DHUB75_P3_1415_16S_64X64_S31=1
 
 [env:pico2_128x32_ppucdmd]
 extends = pico
@@ -250,7 +249,7 @@ board_build.filesystem_size = 1.5m
 lib_deps =
     thomasfredericks/Bounce2
     https://github.com/PPUC/dmdreader#c627fbe48d67f094e4a59ecbea8bc4319e97a6d0
-    https://github.com/PPUC/hub75#c76e6a83320c53cd04f69c29335b92274469435e
+    https://github.com/PPUC/hub75#60aab342dede78f92a252f6f9251936998b9b549
 lib_ignore =
     WiFi
     AsyncUDP

From 34d02296e2763f71e412525f012f1f202f90caf7 Mon Sep 17 00:00:00 2001
From: Markus Kalkbrenner <git@kalki.de>
Date: Tue, 27 Jan 2026 00:08:03 +0100
Subject: [PATCH 27/27] LATCH_BLANKING

---
 platformio.ini | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/platformio.ini b/platformio.ini
index 182c4fe..65b7986 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -135,7 +135,7 @@ board_build.arduino.earlephilhower.usb_pid = 0x1001
 lib_deps =
     thomasfredericks/Bounce2
     https://github.com/Cpasjuste/Adafruit_TinyUSB_Arduino#zedmd
-    https://github.com/PPUC/hub75#60aab342dede78f92a252f6f9251936998b9b549
+    https://github.com/PPUC/hub75#012944057476da4e4e976db7ed3b5fbc0bb4f2d2
 lib_ignore =
     SPI
     WiFi
@@ -191,6 +191,7 @@ build_flags = ${pico.build_flags}
     -DCLK_PIN=11
     -DSTROBE_PIN=12
     -DOEN_PIN=13
+    -DLATCH_BLANKING=4
 
 [env:pico2_128x32_ppucdmd]
 extends = pico
@@ -249,7 +250,7 @@ board_build.filesystem_size = 1.5m
 lib_deps =
     thomasfredericks/Bounce2
     https://github.com/PPUC/dmdreader#c627fbe48d67f094e4a59ecbea8bc4319e97a6d0
-    https://github.com/PPUC/hub75#60aab342dede78f92a252f6f9251936998b9b549
+    https://github.com/PPUC/hub75#012944057476da4e4e976db7ed3b5fbc0bb4f2d2
 lib_ignore =
     WiFi
     AsyncUDP