aquacontrol32
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CelliesProjects
Screen is only white
Hello.The controller is working perfectly but the ILI9341 screen is only white and I need some advice.Thanks
Hmm the ili9341 is a real pita to get going. The build quality is very poor and there are a lot of differences between the different boards from suppliers like aliexpress, ebay etc. I am working on a v2 and I will not add a ili9341 this time to save myself a lot of hassle.
Does the display work with the examples from the ili9341 library? Did you try the force option in the web interface? Are there pullups on the relevant pins from the display? Without these the display will not work for very long if at all. Also check the power supply, feeding it from the 3v3 or 5v LDO on most esps will not work properly. Use a seperate LDO for the display.
See also https://forum.arduino.cc/t/ili9341-white-screen-sleep-mode-caused-by-unstable-power/322737
Good evening and thank you for your response. I tested the display with NodeMCU esp8266 and it works perfectly. I checked the connection maybe 20 times, the resistors are connected according to the recommendations, I supply the display with 3.3V. I have also tried powering from a separate LDO and I have no idea at all
Hello. So I found and tried the attached test code on the MH-ET LIVE MiniKit ESP32 and my display works with this code and pinout. So please advise what to do next. Thank you very much for now
/*************************************************** 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"
#define _cs 4 // goes to TFT CS #define _dc 27 // goes to TFT DC #define _mosi 32 // goes to TFT MOSI #define _sclk 25 // goes to TFT SCK/CLK #define _rst 12 // goes to TFT RESET #define _miso 39 // Not connected
#define TFT_BACKLIGHT_PIN 2
// 3.3V // Goes to TFT LED
// 5v // Goes to TFT Vcc
// Gnd // Goes to TFT Gnd
// Use hardware SPI //Adafruit_ILI9341 tft = Adafruit_ILI9341(_cs, _dc, _rst);
// If using software SPI change pins as desired Adafruit_ILI9341 tft = Adafruit_ILI9341(_cs, _dc, _mosi, _sclk, _rst);
void setup() { Serial.begin(115200); Serial.println("ILI9341 Test!");
pinMode( TFT_BACKLIGHT_PIN, OUTPUT ); digitalWrite( TFT_BACKLIGHT_PIN, HIGH );
tft.begin();tft.setRotation(3);tft.fillScreen(ILI9341_BLACK); tft.setTextSize(3);tft.println("Starting...");delay(1000); tft.fillScreen(ILI9341_BLACK); // 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(500);
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(500); } tft.begin();tft.setRotation(3);tft.fillScreen(ILI9341_BLACK); tft.setTextSize(3);tft.println("Finished...");delay(100000); }
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, i10, i10)); t += micros() - start; tft.drawTriangle(cx, cy - i, cx - i, cy + i, cx + i, cy + i, tft.color565(i10, i10, 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; }