Hi everyone,
I can't get the screen I bought to work with my R4. The screen generate images when used with R3 and other libraries, but I need a more powerful microcontroller and a library that can display sprites, and so I bought an Arduino R4.
All I have got now is a white screen.
Hardware:
I'm using an Arduino R4 Minima
A 4.0 inch TFT Screen ILI9486 shield
Library:
GFX library for Arduino
Program: GFX library for Arduino's "Hello World!" Example. I changed the code slightly (the display class, ILI9486).
I have found that video that shows ILI9486 working with R4
that leads to this Instructable:
When I upload the code below to my R4, there no message error during compilation nor upload, which is an improvement, however the screen remains depressingly blank.
What do I do wrong?
/*******************************************************************************
* Start of Arduino_GFX setting
*
* Arduino_GFX try to find the settings depends on selected board in Arduino IDE
* Or you can define the display dev kit not in the board list
* Defalult pin list for non display dev kit:
* Arduino Nano, Micro and more: CS: 9, DC: 8, RST: 7, BL: 6, SCK: 13, MOSI: 11, MISO: 12
* ESP32 various dev board : CS: 5, DC: 27, RST: 33, BL: 22, SCK: 18, MOSI: 23, MISO: nil
* ESP32-C3 various dev board : CS: 7, DC: 2, RST: 1, BL: 3, SCK: 4, MOSI: 6, MISO: nil
* ESP32-S2 various dev board : CS: 34, DC: 38, RST: 33, BL: 21, SCK: 36, MOSI: 35, MISO: nil
* ESP32-S3 various dev board : CS: 40, DC: 41, RST: 42, BL: 48, SCK: 36, MOSI: 35, MISO: nil
* ESP8266 various dev board : CS: 15, DC: 4, RST: 2, BL: 5, SCK: 14, MOSI: 13, MISO: 12
* Raspberry Pi Pico dev board : CS: 17, DC: 27, RST: 26, BL: 28, SCK: 18, MOSI: 19, MISO: 16
* RTL8720 BW16 old patch core : CS: 18, DC: 17, RST: 2, BL: 23, SCK: 19, MOSI: 21, MISO: 20
* RTL8720_BW16 Official core : CS: 9, DC: 8, RST: 6, BL: 3, SCK: 10, MOSI: 12, MISO: 11
* RTL8722 dev board : CS: 18, DC: 17, RST: 22, BL: 23, SCK: 13, MOSI: 11, MISO: 12
* RTL8722_mini dev board : CS: 12, DC: 14, RST: 15, BL: 13, SCK: 11, MOSI: 9, MISO: 10
* Seeeduino XIAO dev board : CS: 3, DC: 2, RST: 1, BL: 0, SCK: 8, MOSI: 10, MISO: 9
* Teensy 4.1 dev board : CS: 39, DC: 41, RST: 40, BL: 22, SCK: 13, MOSI: 11, MISO: 12
******************************************************************************/
#include <Arduino_GFX_Library.h>
#define GFX_BL DF_GFX_BL // default backlight pin, you may replace DF_GFX_BL to actual backlight pin
/* More dev device declaration: https://github.com/moononournation/Arduino_GFX/wiki/Dev-Device-Declaration */
#if defined(DISPLAY_DEV_KIT)
Arduino_GFX *gfx = create_default_Arduino_GFX();
#else /* !defined(DISPLAY_DEV_KIT) */
/* More data bus class: https://github.com/moononournation/Arduino_GFX/wiki/Data-Bus-Class */
Arduino_DataBus *bus = create_default_Arduino_DataBus();
/* More display class: https://github.com/moononournation/Arduino_GFX/wiki/Display-Class */
// THE ONLY LINE I HAVE CHANGED
Arduino_GFX *gfx = new Arduino_ILI9486(bus, 7 /* RST */, 0 /* rotation */, false /* IPS */);
#endif /* !defined(DISPLAY_DEV_KIT) */
/*******************************************************************************
* End of Arduino_GFX setting
******************************************************************************/
void setup(void)
{
Serial.begin(9600);
// Serial.setDebugOutput(true);
// while(!Serial);
Serial.println("Arduino_GFX Hello World example");
#ifdef GFX_EXTRA_PRE_INIT
GFX_EXTRA_PRE_INIT();
#endif
// Init Display
if (!gfx->begin())
{
Serial.println("gfx->begin() failed!");
}
gfx->fillScreen(BLACK);
#ifdef GFX_BL
pinMode(GFX_BL, OUTPUT);
digitalWrite(GFX_BL, HIGH);
#endif
gfx->setCursor(10, 10);
gfx->setTextColor(RED);
gfx->println("Hello World!");
delay(5000); // 5 seconds
Serial.println("Ta mere");
}
void loop()
{
gfx->setCursor(random(gfx->width()), random(gfx->height()));
gfx->setTextColor(random(0xffff), random(0xffff));
gfx->setTextSize(random(6) /* x scale */, random(6) /* y scale */, random(2) /* pixel_margin */);
gfx->println("Hello World!");
delay(1000); // 1 second
Serial.println("Ta mere");
}
