Originally Posted by
mjs513
Cool that was my next try - did try the HX display but for some reason not working with the t3.2. Right now trying the tristate buffer but that didnt work with the ILI9488 with the t3,2
Think will have to try with T3.5 next
I swapped in T3.2 for 3.5 and so far it appears to work ST7789...
Sketch:
Code:
// 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 <JPEGDEC.h>
#include <ST7735_t3.h>
#include <ST7789_t3.h>
#include <Bounce.h>
#include <SD.h>
#define TFT_RST 8
#define TFT_DC 9
#define TFT_CS 10
ST7789_t3 tft = ST7789_t3(TFT_CS, TFT_DC, TFT_RST);
JPEGDEC jpeg;
// 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.init(240, 320); // Init ST7789 2.0" 320x240
tft.setRotation(0);
tft.fillScreen(ST77XX_BLACK);
tft.setTextColor(ST77XX_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(ST77XX_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) {
myfile = SD.open(filename);
*size = myfile.size();
return &myfile;
}
void myClose(void *handle) {
if (myfile) myfile.close();
}
int32_t myRead(JPEGFILE *handle, uint8_t *buffer, int32_t length) {
if (!myfile) return 0;
return myfile.read(buffer, length);
}
int32_t mySeek(JPEGFILE *handle, int32_t position) {
if (!myfile) return 0;
return myfile.seek(position);
}
// Function to draw pixels to the display
void JPEGDraw(JPEGDRAW *pDraw) {
//Serial.printf("jpeg draw: x,y=%d,%d, cx,cy = %d,%d\n",
//pDraw->x, pDraw->y, pDraw->iWidth, pDraw->iHeight);
tft.writeRect(pDraw->x, pDraw->y, pDraw->iWidth, pDraw->iHeight, pDraw->pPixels);
}
// Main loop, scan for all .JPG files on the card and display them
void loop() {
int 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, "JPG") == 0) {
Serial.print("File: ");
Serial.println(name);
tft.print("File: ");
tft.println(name);
jpeg.open((const char *)name, myOpen, myClose, myRead, mySeek, JPEGDraw);
jpeg.decode(0, 0, 0);
jpeg.close();
filecount = filecount + 1;
if (digitalRead(34) == LOW) {
// skip delay between images when pushbutton is pressed
delay(1000);
}
}
}
entry.close();
}
if (filecount == 0) {
Serial.println("No .JPG files found");
tft.println("No .JPG files found");
delay(2000);
}
}
Note: the line in RED where I edited the CS pin... Probably should move to #define... But...
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] with NO DELAY - because at least one valid buffer is ready, but multiple numbers are overlaid audibly well. But putting even 1ms delay between them allows one to fail and it gets lost and goes buzzy.