SPI Flash data compression (#18879)

Marlin/src/lcd/extui/lib/mks_ui/SPIFlashStorage.cpp

@@ -0,0 +1,317 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * 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
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "../../../../inc/MarlinConfigPre.h"
+
+#if HAS_TFT_LVGL_UI
+
+#include "SPIFlashStorage.h"
+
+uint8_t SPIFlashStorage::::m_pageData[SPI_FLASH_PageSize];
+uint32_t SPIFlashStorage::::m_currentPage;
+uint16_t SPIFlashStorage::::m_pageDataUsed;
+uint32_t SPIFlashStorage::::m_startAddress;
+
+#if HAS_SPI_FLASH_COMPRESSION
+
+  uint8_t SPIFlashStorage::m_compressedData[SPI_FLASH_PageSize];
+  uint16_t SPIFlashStorage::m_compressedDataUsed;
+
+  template <typename T>
+  static uint32_t rle_compress(T *output, uint32_t outputLength, T *input, uint32_t inputLength, uint32_t& inputProcessed) {
+    uint32_t count = 0, out = 0, index, i;
+    T pixel;
+    //32767 for uint16_t
+    //127 for uint16_t
+    //calculated at compile time
+    constexpr T max = (0xFFFFFFFF >> (8 * (4 - sizeof(T)))) / 2;
+
+    inputProcessed = 0;
+    while (count < inputLength && out < outputLength) {
+      index = count;
+      pixel = input[index++];
+      while (index < inputLength && index - count < max && input[index] == pixel)
+        index++;
+      if (index - count == 1) {
+        /*
+         * Failed to "replicate" the current pixel. See how many to copy.
+         * Avoid a replicate run of only 2-pixels after a literal run. There
+         * is no gain in this, and there is a risK of loss if the run after
+         * the two identical pixels is another literal run. So search for
+         * 3 identical pixels.
+         */
+        while (index < inputLength && index - count < max && (input[index] != input[index - 1] || (index > 1 && input[index] != input[index - 2])))
+          index++;
+        /*
+         * Check why this run stopped. If it found two identical pixels, reset
+         * the index so we can add a run. Do this twice: the previous run
+         * tried to detect a replicate run of at least 3 pixels. So we may be
+         * able to back up two pixels if such a replicate run was found.
+         */
+        while (index < inputLength && input[index] == input[index - 1])
+          index--;
+        // If the output buffer could overflow, stop at the remaining bytes
+        NOMORE(index, count + outputLength - out - 1);
+        output[out++] = (uint16_t)(count - index);
+        for (i = count; i < index; i++)
+          output[out++] = input[i];
+      }
+      else {
+        // Need at least more 2 spaces
+        if (out > outputLength - 2) break;
+        output[out++] = (uint16_t)(index - count);
+        output[out++] = pixel;
+      }
+      count = index;
+    }
+    inputProcessed = count;
+
+    // Padding
+    if (out == outputLength - 1) output[out++] = 0;
+
+    return out;
+  }
+
+  template <typename UT, typename T>
+  static uint32_t rle_uncompress(UT *output, uint32_t outputLength, UT *input, uint32_t inputLength, uint32_t &outputFilled) {
+    T count;
+    UT i;
+    uint32_t processedBytes = 0;
+    outputFilled = 0;
+
+    while (outputLength > 0 && inputLength > 0) {
+      processedBytes++;
+      count = static_cast<T>(*input++);
+      inputLength--;
+      if (count > 0) { // Replicate run
+        for (i = 0; i < count && outputLength > i; i++)
+          output[i] = *input;
+        outputFilled += i;
+        // If copy incomplete, change the input buffer to start with remaining data in the next call
+        if (i < count) {
+          // Change to process the difference in the next call
+          *(input - 1) = static_cast<UT>(count - i);
+          return processedBytes - 1;
+        }
+        input++;
+        inputLength--;
+        processedBytes++;
+      }
+      else if (count < 0) { // literal run
+        count = static_cast<T>(-count);
+        // Copy, validating if the output have enough space
+        for (i = 0; i < count && outputLength > i; i++)
+          output[i] = input[i];
+        outputFilled += i;
+        // If copy incomplete, change the input buffer to start with remaining data in the next call
+        if (i < count) {
+          input[i - 1] = static_cast<UT>((count - i) * -1);
+          // Back one
+          return processedBytes + i - 1;
+        }
+        input += count;
+        inputLength -= count;
+        processedBytes += count;
+      }
+      output += count;
+      outputLength -= count;
+    }
+
+    return processedBytes;
+  }
+
+#endif // HAS_SPI_FLASH_COMPRESSION
+
+void SPIFlashStorage::beginWrite(uint32_t startAddress) {
+  m_pageDataUsed = 0;
+  m_currentPage = 0;
+  m_startAddress = startAddress;
+  #if HAS_SPI_FLASH_COMPRESSION
+    // Restart the compressed buffer, keep the pointers of the uncompressed buffer
+    m_compressedDataUsed = 0;
+  #endif
+}
+
+
+void SPIFlashStorage::endWrite() {
+  // Flush remaining data
+  #if HAS_SPI_FLASH_COMPRESSION
+    if (m_compressedDataUsed > 0) {
+      flushPage();
+      savePage(m_compressedData);
+    }
+  #else
+    if (m_pageDataUsed > 0) flushPage();
+  #endif
+}
+
+void SPIFlashStorage::savePage(uint8_t* buffer) {
+  W25QXX.SPI_FLASH_BufferWrite(buffer, m_startAddress + (SPI_FLASH_PageSize * m_currentPage), SPI_FLASH_PageSize);
+
+  // Test env
+  // char fname[256];
+  // snprintf(fname, sizeof(fname), "./pages/page-%03d.data", m_currentPage);
+  // FILE *fp = fopen(fname, "wb");
+  // fwrite(buffer, 1, m_compressedDataUsed, fp);
+  // fclose(fp);
+}
+
+void SPIFlashStorage::loadPage(uint8_t* buffer) {
+  W25QXX.SPI_FLASH_BufferRead(buffer, m_startAddress + (SPI_FLASH_PageSize * m_currentPage), SPI_FLASH_PageSize);
+
+  // Test env
+  // char fname[256];
+  // memset(buffer, 0, SPI_FLASH_PageSize);
+  // snprintf(fname, sizeof(fname), "./pages/page-%03d.data", m_currentPage);
+  // FILE *fp = fopen(fname, "rb");
+  // if (fp != NULL) {
+  //     fread(buffer, 1, SPI_FLASH_PageSize, fp);
+  //     fclose(fp);
+  // }
+}
+
+void SPIFlashStorage::flushPage() {
+  #if HAS_SPI_FLASH_COMPRESSION
+    // Work com with compressed in memory
+    uint32_t inputProcessed;
+    uint32_t compressedSize = rle_compress<uint16_t>((uint16_t *)(m_compressedData + m_compressedDataUsed), compressedDataFree() / 2, (uint16_t *)m_pageData, m_pageDataUsed / 2, inputProcessed) * 2;
+    inputProcessed *= 2;
+    m_compressedDataUsed += compressedSize;
+
+    // Space remaining in the compressed buffer?
+    if (compressedDataFree() > 0) {
+      // Free the uncompressed buffer
+      m_pageDataUsed = 0;
+      return;
+    }
+
+    // Part of the m_pageData was compressed, so ajust the pointers, freeing what was processed, shift the buffer
+    // TODO: To avoid this copy, use a circular buffer
+    memmove(m_pageData, m_pageData + inputProcessed, m_pageDataUsed - inputProcessed);
+    m_pageDataUsed -= inputProcessed;
+
+    // No? So flush page with compressed data!!
+    uint8_t *buffer = m_compressedData;
+  #else
+    uint8_t *buffer = m_pageData;
+  #endif
+
+  savePage(buffer);
+
+  #if HAS_SPI_FLASH_COMPRESSION
+    // Restart the compressed buffer, keep the pointers of the uncompressed buffer
+    m_compressedDataUsed = 0;
+  #elif
+    m_pageDataUsed = 0;
+  #endif
+  m_currentPage++;
+}
+
+void SPIFlashStorage::readPage() {
+  #if HAS_SPI_FLASH_COMPRESSION
+    if (compressedDataFree() == 0) {
+      loadPage(m_compressedData);
+      m_currentPage++;
+      m_compressedDataUsed = 0;
+    }
+
+    // Need to uncompress data
+    if (pageDataFree() == 0) {
+      m_pageDataUsed = 0;
+      uint32_t outpuProcessed = 0;
+      uint32_t inputProcessed = rle_uncompress<uint16_t, int16_t>((uint16_t *)(m_pageData + m_pageDataUsed), pageDataFree() / 2, (uint16_t *)(m_compressedData + m_compressedDataUsed), compressedDataFree() / 2, outpuProcessed);
+      inputProcessed *= 2;
+      outpuProcessed *= 2;
+      if (outpuProcessed < pageDataFree()) {
+        m_pageDataUsed = SPI_FLASH_PageSize - outpuProcessed;
+        // TODO: To avoid this copy, use a circular buffer
+        memmove(m_pageData + m_pageDataUsed, m_pageData, outpuProcessed);
+      }
+
+      m_compressedDataUsed += inputProcessed;
+    }
+  #else
+    loadPage(m_pageData);
+    m_pageDataUsed = 0;
+    m_currentPage++;
+  #endif
+}
+
+uint16_t SPIFlashStorage::inData(uint8_t* data, uint16_t size) {
+  // Don't write more than we can
+  NOMORE(size, pageDataFree());
+  memcpy(m_pageData + m_pageDataUsed, data, size);
+  m_pageDataUsed += size;
+  return size;
+}
+
+void SPIFlashStorage::writeData(uint8_t* data, uint16_t size) {
+  // Flush a page if needed
+  if (pageDataFree() == 0) flushPage();
+
+  while (size > 0) {
+    uint16_t written = inData(data, size);
+    size -= written;
+    // Need to write more? Flush page and continue!
+    if (size > 0) {
+      flushPage();
+      data += written;
+    }
+  }
+}
+
+void SPIFlashStorage::beginRead(uint32_t startAddress) {
+  m_startAddress = startAddress;
+  m_currentPage = 0;
+  // Nothing in memory now
+  m_pageDataUsed = SPI_FLASH_PageSize;
+  #if HAS_SPI_FLASH_COMPRESSION
+    m_compressedDataUsed = sizeof(m_compressedData);
+  #endif
+}
+
+uint16_t SPIFlashStorage::outData(uint8_t* data, uint16_t size) {
+  // Don't read more than we have
+  NOMORE(size > pageDataFree());
+  memcpy(data, m_pageData + m_pageDataUsed, size);
+  m_pageDataUsed += size;
+  return size;
+}
+
+void SPIFlashStorage::readData(uint8_t* data, uint16_t size) {
+  // Read a page if needed
+  if (pageDataFree() == 0) readPage();
+
+  while (size > 0) {
+    uint16_t read = outData(data, size);
+    size -= read;
+    // Need to write more? Flush page and continue!
+    if (size > 0) {
+      readPage();
+      data += read;
+    }
+  }
+}
+
+SPIFlashStorage SPIFlash;
+
+#endif // HAS_TFT_LVGL_UI

Marlin/src/lcd/extui/lib/mks_ui/SPIFlashStorage.h

@@ -0,0 +1,108 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * 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
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ */
+#pragma once
+
+#include "W25Qxx.h"
+
+#define HAS_SPI_FLASH_COMPRESSION 1
+
+/**
+ * This class manages and optimizes SPI Flash data storage,
+ * keeping an internal buffer to write and save full SPI flash
+ * pages as needed.
+ *
+ * Since the data is always in the buffer, the class is also
+ * able to support fast on-the-fly RLE compression/decompression.
+ *
+ * In testing with the current LVGL_UI it compacts 2.9MB of icons
+ * (which have lots of runs) down to 370kB!!! As a result the UI
+ * refresh rate becomes faster and now all LVGL UI can fit into a
+ * tiny 2MB SPI Flash, such as the Chitu Board.
+ *
+ * == Usage ==
+ *
+ * Writing:
+ *
+ * The class keeps an internal buffer that caches data until it
+ * fits into a full SPI Flash page. Each time the buffer fills up
+ * the page is saved to SPI Flash. Sequential writes are optimal.
+ *
+ *    SPIFlashStorage.beginWrite(myStartAddress);
+ *    while (there is data to write)
+ *      SPIFlashStorage.addData(myBuffer, bufferSize);
+ *    SPIFlashStorage.endWrite(); // Flush remaining buffer data
+ *
+ * Reading:
+ *
+ * When reading, it loads a full page from SPI Flash at once and
+ * keeps it in a private SRAM buffer. Data is loaded as needed to
+ * fullfill requests. Sequential reads are optimal.
+ *
+ *    SPIFlashStorage.beginRead(myStartAddress);
+ *    while (there is data to read)
+ *      SPIFlashStorage.readData(myBuffer, bufferSize);
+ *
+ * Compression:
+ *
+ * The biggest advantage of this class is the RLE compression.
+ * With compression activated a second buffer holds the compressed
+ * data, so when writing data, as this buffer becomes full it is
+ * flushed to SPI Flash.
+ *
+ * The same goes for reading: A compressed page is read from SPI
+ * flash, and the data is uncompressed as needed to provide the
+ * requested amount of data.
+ */
+class SPIFlashStorage {
+public:
+  // Write operation
+  static void beginWrite(uint32_t startAddress);
+  static void endWrite();
+  static void writeData(uint8_t* data, uint16_t size);
+
+  static // Read operation
+  static void beginRead(uint32_t startAddress);
+  static void readData(uint8_t* data, uint16_t size);
+
+  static uint32_t getCurrentPage() { return m_currentPage; }
+
+private:
+  static void flushPage();
+  static void savePage(uint8_t* buffer);
+  static void loadPage(uint8_t* buffer);
+  static void readPage();
+  static uint16_t inData(uint8_t* data, uint16_t size);
+  static uint16_t outData(uint8_t* data, uint16_t size);
+
+  static uint8_t m_pageData[SPI_FLASH_PageSize];
+  static uint32_t m_currentPage;
+  static uint16_t m_pageDataUsed;
+  static inline uint16_t pageDataFree() { return SPI_FLASH_PageSize - m_pageDataUsed; }
+  static uint32_t m_startAddress;
+  #if HAS_SPI_FLASH_COMPRESSION
+    static uint8_t m_compressedData[SPI_FLASH_PageSize];
+    static uint16_t m_compressedDataUsed;
+    static inline uint16_t compressedDataFree() { return SPI_FLASH_PageSize - m_compressedDataUsed; }
+  #endif
+};
+
+extern SPIFlashStorage SPIFlash;

Marlin/src/lcd/extui/lib/mks_ui/pic_manager.cpp

@@ -23,16 +23,17 @@
 
 #if HAS_TFT_LVGL_UI
 
-#include "../../../../MarlinCore.h"
-
 #include "string.h"
-
 #include "pic_manager.h"
-#include "W25Qxx.h"
-#include "../../../../sd/cardreader.h"
 #include "draw_ready_print.h"
 #include "mks_hardware_test.h"
 
+#include "SPIFlashStorage.h"
+#include "W25Qxx.h"
+
+#include "../../../../MarlinCore.h"
+#include "../../../../sd/cardreader.h"
+
 extern uint16_t DeviceCode;
 extern unsigned char bmp_public_buf[17 * 1024];
 
@@ -205,11 +206,11 @@ static char assets[][LONG_FILENAME_LENGTH] = {
 };
 
 #if HAS_SPI_FLASH_FONT
-  static char fonts[][LONG_FILENAME_LENGTH] = {
+  static char fonts[][LONG_FILENAME_LENGTH] = { "FontUNIGBK.bin" };
-    "FontUNIGBK.bin",
-  };
 #endif
 
+static uint8_t currentFlashPage = 0;
+
 uint32_t lv_get_pic_addr(uint8_t *Pname) {
   uint8_t Pic_cnt;
   uint8_t i, j;
@@ -217,6 +218,8 @@ uint32_t lv_get_pic_addr(uint8_t *Pname) {
   uint32_t tmp_cnt = 0;
   uint32_t addr = 0;
 
+  currentFlashPage = 0;
+
   #if ENABLED(MARLIN_DEV_MODE)
     SERIAL_ECHOLNPAIR("Getting picture SPI Flash Address: ", (const char*)Pname);
   #endif
@@ -371,6 +374,10 @@ uint8_t public_buf[512];
     return -1;
   }
 
+  #if ENABLED(MARLIN_DEV_MODE)
+    static uint32_t totalSizes = 0, totalCompressed = 0;
+  #endif
+
   #define ASSET_TYPE_ICON       0
   #define ASSET_TYPE_LOGO       1
   #define ASSET_TYPE_TITLE_LOGO 2
@@ -398,43 +405,52 @@ uint8_t public_buf[512];
     pfileSize = file.fileSize();
     totalSizeLoaded += pfileSize;
     if (assetType == ASSET_TYPE_LOGO) {
-      while (1) {
+      do {
         pbr = file.read(public_buf, BMP_WRITE_BUF_LEN);
-        Pic_Logo_Write((uint8_t *)fn, public_buf, pbr); //
+        Pic_Logo_Write((uint8_t *)fn, public_buf, pbr);
-        if (pbr < BMP_WRITE_BUF_LEN) break;
+      } while (pbr >= BMP_WRITE_BUF_LEN);
-      }
     }
     else if (assetType == ASSET_TYPE_TITLE_LOGO) {
-      while (1) {
+      do {
         pbr = file.read(public_buf, BMP_WRITE_BUF_LEN);
-        Pic_TitleLogo_Write((uint8_t *)fn, public_buf, pbr); //
+        Pic_TitleLogo_Write((uint8_t *)fn, public_buf, pbr);
-        if (pbr < BMP_WRITE_BUF_LEN) break;
+      } while (pbr >= BMP_WRITE_BUF_LEN);
-      }
     }
     else if (assetType == ASSET_TYPE_G_PREVIEW) {
-      while (1) {
+      do {
         pbr = file.read(public_buf, BMP_WRITE_BUF_LEN);
-        default_view_Write(public_buf, pbr); //
+        default_view_Write(public_buf, pbr);
-        if (pbr < BMP_WRITE_BUF_LEN) break;
+      } while (pbr >= BMP_WRITE_BUF_LEN);
-      }
     }
     else if (assetType == ASSET_TYPE_ICON) {
       Pic_Write_Addr = Pic_Info_Write((uint8_t *)fn, pfileSize);
-      while (1) {
+      SPIFlash.beginWrite(Pic_Write_Addr);
-        pbr = file.read(public_buf, BMP_WRITE_BUF_LEN);
+      #if HAS_SPI_FLASH_COMPRESSION
-        W25QXX.SPI_FLASH_BufferWrite(public_buf, Pic_Write_Addr, pbr);
+        do {
-        Pic_Write_Addr += pbr;
+          pbr = file.read(public_buf, SPI_FLASH_PageSize);
-        if (pbr < BMP_WRITE_BUF_LEN) break;
+          TERN_(MARLIN_DEV_MODE, totalSizes += pbr);
-      }
+          SPIFlash.writeData(public_buf, SPI_FLASH_PageSize);
+        } while (pbr >= SPI_FLASH_PageSize);
+      #else
+        do {
+          pbr = file.read(public_buf, BMP_WRITE_BUF_LEN);
+          W25QXX.SPI_FLASH_BufferWrite(public_buf, Pic_Write_Addr, pbr);
+          Pic_Write_Addr += pbr;
+        } while (pbr >= BMP_WRITE_BUF_LEN);
+      #endif
+      #if ENABLED(MARLIN_DEV_MODE)
+        SERIAL_ECHOLNPAIR("Space used: ", fn, " - ", (SPIFlash.getCurrentPage() + 1) * SPI_FLASH_PageSize / 1024, "KB");
+        totalCompressed += (SPIFlash.getCurrentPage() + 1) * SPI_FLASH_PageSize;
+      #endif
+      SPIFlash.endWrite();
     }
     else if (assetType == ASSET_TYPE_FONT) {
       Pic_Write_Addr = UNIGBK_FLASH_ADDR;
-      while (1) {
+      do {
         pbr = file.read(public_buf, BMP_WRITE_BUF_LEN);
         W25QXX.SPI_FLASH_BufferWrite(public_buf, Pic_Write_Addr, pbr);
         Pic_Write_Addr += pbr;
-        if (pbr < BMP_WRITE_BUF_LEN) break;
+      } while (pbr >= BMP_WRITE_BUF_LEN);
-      }
     }
 
     file.close();
@@ -459,13 +475,13 @@ uint8_t public_buf[512];
       disp_assets_update_progress("Reading files...");
       dir_t d;
       while (dir.readDir(&d, card.longFilename) > 0) {
-        // if we dont get a long name, but gets a short one, try it
+        // If we dont get a long name, but gets a short one, try it
         if (card.longFilename[0] == 0 && d.name[0] != 0)
           dosName2LongName((const char*)d.name, card.longFilename);
         if (card.longFilename[0] == 0) continue;
         if (card.longFilename[0] == '.') continue;
 
-        uint8_t a = arrayFindStr(assets, COUNT(assets), card.longFilename);
+        int8_t a = arrayFindStr(assets, COUNT(assets), card.longFilename);
         if (a >= 0 && a < COUNT(assets)) {
           uint8_t assetType = ASSET_TYPE_ICON;
           if (strstr(assets[a], "_logo"))
@@ -482,9 +498,8 @@ uint8_t public_buf[512];
 
         #if HAS_SPI_FLASH_FONT
           a = arrayFindStr(fonts, COUNT(fonts), card.longFilename);
-          if (a >= 0 && a < COUNT(fonts)) {
+          if (a >= 0 && a < COUNT(fonts))
             loadAsset(dir, d, fonts[a], ASSET_TYPE_FONT);
-          }
         #endif
       }
       dir.rename(&root, bakPath);
@@ -496,11 +511,13 @@ uint8_t public_buf[512];
       W25QXX.SPI_FLASH_BufferRead(&pic_counter, PIC_COUNTER_ADDR, 1);
       SERIAL_ECHOLNPAIR("Total assets loaded: ", pic_counter);
     #endif
+
+    SERIAL_ECHOLNPAIR("Total Uncompressed: ", totalSizes, ", Compressed: ", totalCompressed);
   }
 
   #if HAS_SPI_FLASH_FONT
     void spi_flash_read_test() { W25QXX.SPI_FLASH_BufferRead(public_buf, UNIGBK_FLASH_ADDR, BMP_WRITE_BUF_LEN); }
-  #endif // HAS_SPI_FLASH_FONT
+  #endif
 
 #endif // SDSUPPORT
 
@@ -531,8 +548,15 @@ void Pic_Read(uint8_t *Pname, uint8_t *P_Rbuff) {
 }
 
 void lv_pic_test(uint8_t *P_Rbuff, uint32_t addr, uint32_t size) {
-  W25QXX.init(SPI_QUARTER_SPEED);
+  #if HAS_SPI_FLASH_COMPRESSION
-  W25QXX.SPI_FLASH_BufferRead((uint8_t *)P_Rbuff, addr, size);
+    if (currentFlashPage == 0)
+      SPIFlash.beginRead(addr);
+    SPIFlash.readData(P_Rbuff, size);
+    currentFlashPage++;
+  #else
+    W25QXX.init(SPI_QUARTER_SPEED);
+    W25QXX.SPI_FLASH_BufferRead((uint8_t *)P_Rbuff, addr, size);
+  #endif
 }
 
 #if HAS_SPI_FLASH_FONT

Marlin/src/lcd/extui/lib/mks_ui/pic_manager.h

@@ -63,7 +63,7 @@ extern "C" { /* C-declarations for C++ */
 #define DEFAULT_VIEW_MAX_SIZE           (200*200*2)
 #define FLASH_VIEW_MAX_SIZE             (200*200*2)
 
-#define PER_PIC_MAX_SPACE_TFT35         (32*1024)
+#define PER_PIC_MAX_SPACE_TFT35         (9*1024)
 #define PER_PIC_MAX_SPACE_TFT32         (16*1024)
 #define PER_FONT_MAX_SPACE              (16*1024)
 
@@ -88,7 +88,7 @@ extern "C" { /* C-declarations for C++ */
   #define PIC_OTHER_SIZE_ADDR_TFT32     0x5EE000
 
   // font
-  #define FONTINFOADDR                  0x183000 // 6M -- font addr
+  #define FONTINFOADDR                  0x150000 // 6M -- font addr
   #define UNIGBK_FLASH_ADDR            (FONTINFOADDR+4096) // 4*1024
 
 #else

Marlin/src/pins/stm32f1/pins_CHITU3D_V5.h

@@ -150,10 +150,10 @@
 #define SPI_FLASH_SIZE 0x200000                   // 2MB
 
 #if HAS_TFT_LVGL_UI
-  #define HAS_SPI_FLASH_FONT 0
+  #define HAS_SPI_FLASH_FONT 1
   #define HAS_GCODE_PREVIEW 1
   #define HAS_GCODE_DEFAULT_VIEW_IN_FLASH 0
-  #define HAS_LANG_SELECT_SCREEN 0
+  #define HAS_LANG_SELECT_SCREEN 1
   #define HAS_BAK_VIEW_IN_FLASH 0
   #define HAS_LOGO_IN_FLASH 0