commit f871cd690cdedb57c95725da932742784d7fd4b1
Author: Eric <luv.ilho@gmail.com>
Date:   Thu Jul 4 01:17:27 2019 -0700

    First Commit

diff --git a/Esp32_jpeg/fileTest/fileTest.ino b/Esp32_jpeg/fileTest/fileTest.ino
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--- /dev/null
+++ b/Esp32_jpeg/fileTest/fileTest.ino
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+#include "SPIFFS.h"
+
+void setup(void) {
+  Serial.begin(115200);
+  Serial.println("File Test!"); 
+
+  if (!SPIFFS.begin()) {
+      Serial.println("SPIFFS initialisation failed!");
+      while (1) yield(); // Stay here twiddling thumbs waiting
+    }
+    Serial.println("\r\nInitialisation done.");
+    Serial.println("\n----DIR: /:");
+    listDir("/");
+
+}
+
+
+void loop(void) {
+  
+}
+
+
+void listDir(char * dir){
+ 
+  File root = SPIFFS.open(dir);
+  File file = root.openNextFile();
+  while(file){
+ 
+      Serial.print("FILE: ");
+      Serial.println(file.name());
+      file = root.openNextFile();
+  }
+}
diff --git a/Esp32_jpeg/final/final.ino b/Esp32_jpeg/final/final.ino
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+#include "SPIFFS.h"
+
+// JPEG decoder library
+#include <JPEGDecoder.h>
+#include <SPI.h>
+#include "Adafruit_GFX.h"
+#include "Adafruit_ILI9341.h"
+
+// For the Adafruit shield, these are the default.
+#define TFT_DC 17
+#define TFT_CS 5
+#define TFT_RST 4
+
+Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC, TFT_RST);
+
+boolean SPIFFSInited = false;
+int imageIndex = 0;
+
+void setup(void) {
+  
+  long unsigned debug_start = millis ();
+  while (!Serial && ((millis () - debug_start) <= 5000)) ;
+  
+  tft.begin();
+  tft.setRotation(3);
+  tft.fillScreen(ILI9341_RED);
+
+  Serial.println("INIT!");
+
+  if (!SPIFFS.begin()) {
+      Serial.println("SPIFFS initialisation failed!");
+      while (1) yield(); // Stay here twiddling thumbs waiting
+    }
+    SPIFFSInited = true;
+    
+}
+
+void loop(){
+  if(SPIFFSInited){
+
+    if(imageIndex > 45){
+      imageIndex = 0;
+    }
+
+    String fileIndex = "/0";
+    if(imageIndex < 10){
+      fileIndex += "0" + String(imageIndex);
+    }else{
+      fileIndex += "" + String(imageIndex);
+    }
+
+    fileIndex += ".jpg";
+    Serial.println("fileIndex : " + fileIndex);
+    drawFSJpeg(fileIndex.c_str(), 0, 0);
+    
+    imageIndex++;
+  }
+}
+
+
+/*====================================================================================
+  This sketch contains support functions to render the Jpeg images.
+
+  Created by Bodmer 15th Jan 2017
+  ==================================================================================*/
+
+// Return the minimum of two values a and b
+#define minimum(a,b)     (((a) < (b)) ? (a) : (b))
+
+//====================================================================================
+//   This function opens the Filing System Jpeg image file and primes the decoder
+//====================================================================================
+void drawFSJpeg(const char *filename, int xpos, int ypos) {
+
+  Serial.println("=====================================");
+  Serial.print("Drawing file: "); Serial.println(filename);
+  Serial.println("=====================================");
+
+  // Open the file (the Jpeg decoder library will close it)
+  fs::File jpgFile = SPIFFS.open( filename, "r");    // File handle reference for SPIFFS
+  //  File jpgFile = SD.open( filename, FILE_READ);  // or, file handle reference for SD library
+ 
+  if ( !jpgFile ) {
+    Serial.print("ERROR: File \""); Serial.print(filename); Serial.println ("\" not found!");
+    return;
+  }
+
+  // To initialise the decoder and provide the file, we can use one of the three following methods:
+  //boolean decoded = JpegDec.decodeFsFile(jpgFile); // We can pass the SPIFFS file handle to the decoder,
+  //boolean decoded = JpegDec.decodeSdFile(jpgFile); // or we can pass the SD file handle to the decoder,
+  boolean decoded = JpegDec.decodeFsFile(filename);  // or we can pass the filename (leading / distinguishes SPIFFS files)
+                                                     // The filename can be a String or character array
+  if (decoded) {
+    // print information about the image to the serial port
+    jpegInfo();
+
+    // render the image onto the screen at given coordinates
+    jpegRender(xpos, ypos);
+  }
+  else {
+    Serial.println("Jpeg file format not supported!");
+  }
+}
+
+//====================================================================================
+//   Decode and paint onto the TFT screen
+//====================================================================================
+void jpegRender(int xpos, int ypos) {
+
+  // retrieve infomration about the image
+  uint16_t  *pImg;
+  uint16_t mcu_w = JpegDec.MCUWidth;
+  uint16_t mcu_h = JpegDec.MCUHeight;
+  uint32_t max_x = JpegDec.width;
+  uint32_t max_y = JpegDec.height;
+
+  // Jpeg images are draw as a set of image block (tiles) called Minimum Coding Units (MCUs)
+  // Typically these MCUs are 16x16 pixel blocks
+  // Determine the width and height of the right and bottom edge image blocks
+  uint32_t min_w = minimum(mcu_w, max_x % mcu_w);
+  uint32_t min_h = minimum(mcu_h, max_y % mcu_h);
+
+  // save the current image block size
+  uint32_t win_w = mcu_w;
+  uint32_t win_h = mcu_h;
+
+  // record the current time so we can measure how long it takes to draw an image
+  uint32_t drawTime = millis();
+
+  // save the coordinate of the right and bottom edges to assist image cropping
+  // to the screen size
+  max_x += xpos;
+  max_y += ypos;
+
+  // read each MCU block until there are no more
+  while ( JpegDec.read()) {
+
+    // save a pointer to the image block
+    pImg = JpegDec.pImage;
+
+    // calculate where the image block should be drawn on the screen
+    int mcu_x = JpegDec.MCUx * mcu_w + xpos;
+    int mcu_y = JpegDec.MCUy * mcu_h + ypos;
+
+    // check if the image block size needs to be changed for the right edge
+    if (mcu_x + mcu_w <= max_x) win_w = mcu_w;
+    else win_w = min_w;
+
+    // check if the image block size needs to be changed for the bottom edge
+    if (mcu_y + mcu_h <= max_y) win_h = mcu_h;
+    else win_h = min_h;
+
+    // copy pixels into a contiguous block
+    if (win_w != mcu_w)
+    {
+      for (int h = 1; h < win_h-1; h++)
+      {
+        memcpy(pImg + h * win_w, pImg + (h + 1) * mcu_w, win_w << 1);
+      }
+    }
+
+
+    // draw image MCU block only if it will fit on the screen
+    if ( ( mcu_x + win_w) <= tft.width() && ( mcu_y + win_h) <= tft.height())
+    {
+      tft.drawRGBBitmap(mcu_x, mcu_y, pImg, win_w, win_h);
+    }
+
+    // Stop drawing blocks if the bottom of the screen has been reached,
+    // the abort function will close the file
+    else if ( ( mcu_y + win_h) >= tft.height()) JpegDec.abort();
+
+  }
+
+  // calculate how long it took to draw the image
+  drawTime = millis() - drawTime;
+
+  // print the results to the serial port
+  Serial.print  ("Total render time was    : "); Serial.print(drawTime); Serial.println(" ms");
+  Serial.println("=====================================");
+
+}
+
+//====================================================================================
+//   Send time taken to Serial port
+//====================================================================================
+void jpegInfo() {
+  Serial.println(F("==============="));
+  Serial.println(F("JPEG image info"));
+  Serial.println(F("==============="));
+  Serial.print(F(  "Width      :")); Serial.println(JpegDec.width);
+  Serial.print(F(  "Height     :")); Serial.println(JpegDec.height);
+  Serial.print(F(  "Components :")); Serial.println(JpegDec.comps);
+  Serial.print(F(  "MCU / row  :")); Serial.println(JpegDec.MCUSPerRow);
+  Serial.print(F(  "MCU / col  :")); Serial.println(JpegDec.MCUSPerCol);
+  Serial.print(F(  "Scan type  :")); Serial.println(JpegDec.scanType);
+  Serial.print(F(  "MCU width  :")); Serial.println(JpegDec.MCUWidth);
+  Serial.print(F(  "MCU height :")); Serial.println(JpegDec.MCUHeight);
+  Serial.println(F("==============="));
+}
+
+//====================================================================================
+//   Open a Jpeg file and dump it to the Serial port as a C array
+//====================================================================================
+void createArray(const char *filename) {
+
+  fs::File jpgFile;  // File handle reference for SPIFFS
+  //  File jpgFile;  // File handle reference For SD library
+  
+  if ( !( jpgFile = SPIFFS.open( filename, "r"))) {
+    Serial.println(F("JPEG file not found"));
+    return;
+  }
+
+  uint8_t data;
+  byte line_len = 0;
+  Serial.println("// Generated by a JPEGDecoder library example sketch:");
+  Serial.println("// https://github.com/Bodmer/JPEGDecoder");
+  Serial.println("");
+  Serial.println("#if defined(__AVR__)");
+  Serial.println("  #include <avr/pgmspace.h>");
+  Serial.println("#endif");
+  Serial.println("");
+  Serial.print("const uint8_t ");
+  while (*filename != '.') Serial.print(*filename++);
+  Serial.println("[] PROGMEM = {"); // PROGMEM added for AVR processors, it is ignored by Due
+
+  while ( jpgFile.available()) {
+
+    data = jpgFile.read();
+    Serial.print("0x"); if (abs(data) < 16) Serial.print("0");
+    Serial.print(data, HEX); Serial.print(",");// Add value and comma
+    line_len++;
+    if ( line_len >= 32) {
+      line_len = 0;
+      Serial.println();
+    }
+
+  }
+
+  Serial.println("};\r\n");
+  // jpgFile.seek( 0, SeekEnd);
+  jpgFile.close();
+}
+//====================================================================================
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diff --git a/Esp32_jpeg/test/test.ino b/Esp32_jpeg/test/test.ino
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+/***************************************************
+  This is our GFX example for the Adafruit ILI9341 Breakout and Shield
+  ----> http://www.adafruit.com/products/1651
+
+  Check out the links above for our tutorials and wiring diagrams
+  These displays use SPI to communicate, 4 or 5 pins are required to
+  interface (RST is optional)
+  Adafruit invests time and resources providing this open source code,
+  please support Adafruit and open-source hardware by purchasing
+  products from Adafruit!
+
+  Written by Limor Fried/Ladyada for Adafruit Industries.
+  MIT license, all text above must be included in any redistribution
+ ****************************************************/
+
+
+#include "SPI.h"
+#include "Adafruit_GFX.h"
+#include "Adafruit_ILI9341.h"
+
+// For the Adafruit shield, these are the default.
+#define TFT_DC 17
+#define TFT_CS 5
+#define TFT_RST 4
+
+// Use hardware SPI (on Uno, #13, #12, #11) and the above for CS/DC
+Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC, TFT_RST);
+// If using the breakout, change pins as desired
+//Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC, TFT_MOSI, TFT_CLK, TFT_RST, TFT_MISO);
+
+void setup() {
+  Serial.begin(115200);
+  Serial.println("ILI9341 Test!"); 
+ 
+  tft.begin();
+
+  // read diagnostics (optional but can help debug problems)
+  uint8_t x = tft.readcommand8(ILI9341_RDMODE);
+  Serial.print("Display Power Mode: 0x"); Serial.println(x, HEX);
+  x = tft.readcommand8(ILI9341_RDMADCTL);
+  Serial.print("MADCTL Mode: 0x"); Serial.println(x, HEX);
+  x = tft.readcommand8(ILI9341_RDPIXFMT);
+  Serial.print("Pixel Format: 0x"); Serial.println(x, HEX);
+  x = tft.readcommand8(ILI9341_RDIMGFMT);
+  Serial.print("Image Format: 0x"); Serial.println(x, HEX);
+  x = tft.readcommand8(ILI9341_RDSELFDIAG);
+  Serial.print("Self Diagnostic: 0x"); Serial.println(x, HEX); 
+  
+  Serial.println(F("Benchmark                Time (microseconds)"));
+  delay(10);
+  Serial.print(F("Screen fill              "));
+  Serial.println(testFillScreen());
+  delay(500);
+
+  Serial.print(F("Text                     "));
+  Serial.println(testText());
+  delay(3000);
+
+  Serial.print(F("Lines                    "));
+  Serial.println(testLines(ILI9341_CYAN));
+  delay(500);
+
+  Serial.print(F("Horiz/Vert Lines         "));
+  Serial.println(testFastLines(ILI9341_RED, ILI9341_BLUE));
+  delay(500);
+
+  Serial.print(F("Rectangles (outline)     "));
+  Serial.println(testRects(ILI9341_GREEN));
+  delay(500);
+
+  Serial.print(F("Rectangles (filled)      "));
+  Serial.println(testFilledRects(ILI9341_YELLOW, ILI9341_MAGENTA));
+  delay(500);
+
+  Serial.print(F("Circles (filled)         "));
+  Serial.println(testFilledCircles(10, ILI9341_MAGENTA));
+
+  Serial.print(F("Circles (outline)        "));
+  Serial.println(testCircles(10, ILI9341_WHITE));
+  delay(500);
+
+  Serial.print(F("Triangles (outline)      "));
+  Serial.println(testTriangles());
+  delay(500);
+
+  Serial.print(F("Triangles (filled)       "));
+  Serial.println(testFilledTriangles());
+  delay(500);
+
+  Serial.print(F("Rounded rects (outline)  "));
+  Serial.println(testRoundRects());
+  delay(500);
+
+  Serial.print(F("Rounded rects (filled)   "));
+  Serial.println(testFilledRoundRects());
+  delay(500);
+
+  Serial.println(F("Done!"));
+
+}
+
+
+void loop(void) {
+  for(uint8_t rotation=0; rotation<4; rotation++) {
+    tft.setRotation(rotation);
+    testText();
+    delay(1000);
+  }
+}
+
+unsigned long testFillScreen() {
+  unsigned long start = micros();
+  tft.fillScreen(ILI9341_BLACK);
+  yield();
+  tft.fillScreen(ILI9341_RED);
+  yield();
+  tft.fillScreen(ILI9341_GREEN);
+  yield();
+  tft.fillScreen(ILI9341_BLUE);
+  yield();
+  tft.fillScreen(ILI9341_BLACK);
+  yield();
+  return micros() - start;
+}
+
+unsigned long testText() {
+  tft.fillScreen(ILI9341_BLACK);
+  unsigned long start = micros();
+  tft.setCursor(0, 0);
+  tft.setTextColor(ILI9341_WHITE);  tft.setTextSize(1);
+  tft.println("Hello World!");
+  tft.setTextColor(ILI9341_YELLOW); tft.setTextSize(2);
+  tft.println(1234.56);
+  tft.setTextColor(ILI9341_RED);    tft.setTextSize(3);
+  tft.println(0xDEADBEEF, HEX);
+  tft.println();
+  tft.setTextColor(ILI9341_GREEN);
+  tft.setTextSize(5);
+  tft.println("Groop");
+  tft.setTextSize(2);
+  tft.println("I implore thee,");
+  tft.setTextSize(1);
+  tft.println("my foonting turlingdromes.");
+  tft.println("And hooptiously drangle me");
+  tft.println("with crinkly bindlewurdles,");
+  tft.println("Or I will rend thee");
+  tft.println("in the gobberwarts");
+  tft.println("with my blurglecruncheon,");
+  tft.println("see if I don't!");
+  return micros() - start;
+}
+
+unsigned long testLines(uint16_t color) {
+  unsigned long start, t;
+  int           x1, y1, x2, y2,
+                w = tft.width(),
+                h = tft.height();
+
+  tft.fillScreen(ILI9341_BLACK);
+  yield();
+  
+  x1 = y1 = 0;
+  y2    = h - 1;
+  start = micros();
+  for(x2=0; x2<w; x2+=6) tft.drawLine(x1, y1, x2, y2, color);
+  x2    = w - 1;
+  for(y2=0; y2<h; y2+=6) tft.drawLine(x1, y1, x2, y2, color);
+  t     = micros() - start; // fillScreen doesn't count against timing
+
+  yield();
+  tft.fillScreen(ILI9341_BLACK);
+  yield();
+
+  x1    = w - 1;
+  y1    = 0;
+  y2    = h - 1;
+  start = micros();
+  for(x2=0; x2<w; x2+=6) tft.drawLine(x1, y1, x2, y2, color);
+  x2    = 0;
+  for(y2=0; y2<h; y2+=6) tft.drawLine(x1, y1, x2, y2, color);
+  t    += micros() - start;
+
+  yield();
+  tft.fillScreen(ILI9341_BLACK);
+  yield();
+
+  x1    = 0;
+  y1    = h - 1;
+  y2    = 0;
+  start = micros();
+  for(x2=0; x2<w; x2+=6) tft.drawLine(x1, y1, x2, y2, color);
+  x2    = w - 1;
+  for(y2=0; y2<h; y2+=6) tft.drawLine(x1, y1, x2, y2, color);
+  t    += micros() - start;
+
+  yield();
+  tft.fillScreen(ILI9341_BLACK);
+  yield();
+
+  x1    = w - 1;
+  y1    = h - 1;
+  y2    = 0;
+  start = micros();
+  for(x2=0; x2<w; x2+=6) tft.drawLine(x1, y1, x2, y2, color);
+  x2    = 0;
+  for(y2=0; y2<h; y2+=6) tft.drawLine(x1, y1, x2, y2, color);
+
+  yield();
+  return micros() - start;
+}
+
+unsigned long testFastLines(uint16_t color1, uint16_t color2) {
+  unsigned long start;
+  int           x, y, w = tft.width(), h = tft.height();
+
+  tft.fillScreen(ILI9341_BLACK);
+  start = micros();
+  for(y=0; y<h; y+=5) tft.drawFastHLine(0, y, w, color1);
+  for(x=0; x<w; x+=5) tft.drawFastVLine(x, 0, h, color2);
+
+  return micros() - start;
+}
+
+unsigned long testRects(uint16_t color) {
+  unsigned long start;
+  int           n, i, i2,
+                cx = tft.width()  / 2,
+                cy = tft.height() / 2;
+
+  tft.fillScreen(ILI9341_BLACK);
+  n     = min(tft.width(), tft.height());
+  start = micros();
+  for(i=2; i<n; i+=6) {
+    i2 = i / 2;
+    tft.drawRect(cx-i2, cy-i2, i, i, color);
+  }
+
+  return micros() - start;
+}
+
+unsigned long testFilledRects(uint16_t color1, uint16_t color2) {
+  unsigned long start, t = 0;
+  int           n, i, i2,
+                cx = tft.width()  / 2 - 1,
+                cy = tft.height() / 2 - 1;
+
+  tft.fillScreen(ILI9341_BLACK);
+  n = min(tft.width(), tft.height());
+  for(i=n; i>0; i-=6) {
+    i2    = i / 2;
+    start = micros();
+    tft.fillRect(cx-i2, cy-i2, i, i, color1);
+    t    += micros() - start;
+    // Outlines are not included in timing results
+    tft.drawRect(cx-i2, cy-i2, i, i, color2);
+    yield();
+  }
+
+  return t;
+}
+
+unsigned long testFilledCircles(uint8_t radius, uint16_t color) {
+  unsigned long start;
+  int x, y, w = tft.width(), h = tft.height(), r2 = radius * 2;
+
+  tft.fillScreen(ILI9341_BLACK);
+  start = micros();
+  for(x=radius; x<w; x+=r2) {
+    for(y=radius; y<h; y+=r2) {
+      tft.fillCircle(x, y, radius, color);
+    }
+  }
+
+  return micros() - start;
+}
+
+unsigned long testCircles(uint8_t radius, uint16_t color) {
+  unsigned long start;
+  int           x, y, r2 = radius * 2,
+                w = tft.width()  + radius,
+                h = tft.height() + radius;
+
+  // Screen is not cleared for this one -- this is
+  // intentional and does not affect the reported time.
+  start = micros();
+  for(x=0; x<w; x+=r2) {
+    for(y=0; y<h; y+=r2) {
+      tft.drawCircle(x, y, radius, color);
+    }
+  }
+
+  return micros() - start;
+}
+
+unsigned long testTriangles() {
+  unsigned long start;
+  int           n, i, cx = tft.width()  / 2 - 1,
+                      cy = tft.height() / 2 - 1;
+
+  tft.fillScreen(ILI9341_BLACK);
+  n     = min(cx, cy);
+  start = micros();
+  for(i=0; i<n; i+=5) {
+    tft.drawTriangle(
+      cx    , cy - i, // peak
+      cx - i, cy + i, // bottom left
+      cx + i, cy + i, // bottom right
+      tft.color565(i, i, i));
+  }
+
+  return micros() - start;
+}
+
+unsigned long testFilledTriangles() {
+  unsigned long start, t = 0;
+  int           i, cx = tft.width()  / 2 - 1,
+                   cy = tft.height() / 2 - 1;
+
+  tft.fillScreen(ILI9341_BLACK);
+  start = micros();
+  for(i=min(cx,cy); i>10; i-=5) {
+    start = micros();
+    tft.fillTriangle(cx, cy - i, cx - i, cy + i, cx + i, cy + i,
+      tft.color565(0, i*10, i*10));
+    t += micros() - start;
+    tft.drawTriangle(cx, cy - i, cx - i, cy + i, cx + i, cy + i,
+      tft.color565(i*10, i*10, 0));
+    yield();
+  }
+
+  return t;
+}
+
+unsigned long testRoundRects() {
+  unsigned long start;
+  int           w, i, i2,
+                cx = tft.width()  / 2 - 1,
+                cy = tft.height() / 2 - 1;
+
+  tft.fillScreen(ILI9341_BLACK);
+  w     = min(tft.width(), tft.height());
+  start = micros();
+  for(i=0; i<w; i+=6) {
+    i2 = i / 2;
+    tft.drawRoundRect(cx-i2, cy-i2, i, i, i/8, tft.color565(i, 0, 0));
+  }
+
+  return micros() - start;
+}
+
+unsigned long testFilledRoundRects() {
+  unsigned long start;
+  int           i, i2,
+                cx = tft.width()  / 2 - 1,
+                cy = tft.height() / 2 - 1;
+
+  tft.fillScreen(ILI9341_BLACK);
+  start = micros();
+  for(i=min(tft.width(), tft.height()); i>20; i-=6) {
+    i2 = i / 2;
+    tft.fillRoundRect(cx-i2, cy-i2, i, i, i/8, tft.color565(0, i, 0));
+    yield();
+  }
+
+  return micros() - start;
+}