initial commit

2026-02-12 00:45:31 -08:00
commit 5f168f370b
3024 changed files with 804889 additions and 0 deletions
--- a/libraries/PNGdec/examples/sdcard_slideshow/sdcard_slideshow.ino
+++ b/libraries/PNGdec/examples/sdcard_slideshow/sdcard_slideshow.ino
@@ -0,0 +1,108 @@
+// A simple image slideshow which reads all the .JPG files from the root
+// directory of a SD card and shows each for 1 second on an ILI9341 display.
+
+#include <PNGdec.h>
+#include <ILI9341_t3.h>
+#include <Bounce.h>
+#include <SD.h>
+
+#define TFT_DC  9
+#define TFT_CS 10
+
+ILI9341_t3 tft = ILI9341_t3(TFT_CS, TFT_DC);
+PNG png;
+
+// Setup - initialize ILI9341 display, wait for serial monitor, open SD card
+void setup() {
+  pinMode(34, INPUT_PULLDOWN);
+  pinMode(33, OUTPUT);
+  digitalWrite(33, HIGH); // pushbuttons short pins 33 & 34 together
+  Serial.begin(115200);
+  tft.begin();
+  tft.setRotation(3);
+  tft.fillScreen(ILI9341_BLACK);
+  tft.setTextColor(ILI9341_YELLOW);
+  tft.setTextSize(2);
+  tft.println("Waiting for Arduino Serial Monitor...");
+
+  while (!Serial && millis() < 3000); // wait up to 3 seconds for Arduino Serial Monitor
+  Serial.println("ILI9341 Slideshow");
+  tft.fillScreen(ILI9341_BLACK);
+  tft.setCursor(0, 0);
+
+  while (!SD.begin(4/*BUILTIN_SDCARD*/)) {
+    Serial.println("Unable to access SD Card");
+    tft.println("Unable to access SD Card");
+    delay(1000);
+  }
+}
+
+// Functions to access a file on the SD card
+File myfile;
+
+void * myOpen(const char *filename, int32_t *size) {
+  Serial.printf("Attempting to open %s\n", filename);
+  myfile = SD.open(filename);
+  *size = myfile.size();
+  return &myfile;
+}
+void myClose(void *handle) {
+  if (myfile) myfile.close();
+}
+int32_t myRead(PNGFILE *handle, uint8_t *buffer, int32_t length) {
+  if (!myfile) return 0;
+  return myfile.read(buffer, length);
+}
+int32_t mySeek(PNGFILE *handle, int32_t position) {
+  if (!myfile) return 0;
+  return myfile.seek(position);
+}
+
+// Function to draw pixels to the display
+int PNGDraw(PNGDRAW *pDraw) {
+uint16_t usPixels[320];
+
+  png.getLineAsRGB565(pDraw, usPixels, PNG_RGB565_LITTLE_ENDIAN, 0xffffffff);
+  tft.writeRect(0, pDraw->y + 24, pDraw->iWidth, 1, usPixels);
+  return 1;
+}
+
+// Main loop, scan for all .PNG files on the card and display them
+void loop() {
+  int rc, filecount = 0;
+  tft.setCursor(0, 0);
+  File dir = SD.open("/");
+  while (true) {
+    File entry = dir.openNextFile();
+    if (!entry) break;
+    if (entry.isDirectory() == false) {
+      const char *name = entry.name();
+      const int len = strlen(name);
+      if (len > 3 && strcmp(name + len - 3, "PNG") == 0) {
+        Serial.print("File: ");
+        Serial.println(name);
+        tft.fillScreen(ILI9341_BLACK);
+        tft.setCursor(0, 0);
+        tft.print("File: ");
+        tft.println(name);
+        rc = png.open((const char *)name, myOpen, myClose, myRead, mySeek, PNGDraw);
+       if (rc == PNG_SUCCESS) {
+          Serial.printf("image specs: (%d x %d), %d bpp, pixel type: %d\n", png.getWidth(), png.getHeight(), png.getBpp(), png.getPixelType());
+          rc = png.decode(NULL, 0);
+          png.close();
+       }
+        filecount = filecount + 1;
+//        if (digitalRead(34) == LOW) {
+          // skip delay between images when pushbutton is pressed
+          delay(2000);
+//        }
+      }
+    }
+    entry.close();
+  }
+  if (filecount == 0) {
+    Serial.println("No .PNG files found");
+    tft.println("No .PNG files found");
+    delay(2000);
+  }
+}