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By BLCKPSTV
#86313 Hello I hope this is the correct category.

But I'm trying to run a SPI Driven tft module on my wemos D1 mini.

The tft module is de exact!! one I'm using. Others have a CS port.
https://protosupplies.com/product/ips-l ... ay-st7789/

What I don't get is that the wiring never connects.

The code in the link is this.
Code: Select all/***************************************************
  This is a library for the ST7789 IPS SPI display.

  Originally written by Limor Fried/Ladyada for Adafruit Industries.
  Modified by Ananev Ilia
  Further modified by Ken Hahn - ProtoSupplies.com
 ****************************************************/

#include <Adafruit_GFX.h>   // Core graphics library by Adafruit
#include <Arduino_ST7789.h> // Library for ST7789 (with or without CS pin)
#include <SPI.h>

#define TFT_DC    8     // Data/Command
#define TFT_RST   9     // ST7789 Reset
#define TFT_MOSI  11    // SPI data pin
#define TFT_SCLK  13    // SPI sclk pin

// For Hardware SPI
// Using hardware SPI pins (11, 13 on UNO; 51, 52 on MEGA; ICSP-4, ICSP-3 on DUE and etc)
Arduino_ST7789 tft = Arduino_ST7789(TFT_DC, TFT_RST); //for display without CS pin

// Using software SPI on any available pins.  Define above if changes are needed (slower)
//Arduino_ST7789 tft = Arduino_ST7789(TFT_DC, TFT_RST, TFT_MOSI, TFT_SCLK); //for display without CS pin

float p = 3.1415926;
//===============================================================================
//  Initialization
//===============================================================================
void setup() {

  tft.init(240, 240);   // initialize ST7789 chip at 240x240 pixels

  // Paint red/green/blue rectangles
  tft.fillRect(0, 0 , 240, 80, RED);
  tft.fillRect(0, 80 , 240, 160, GREEN);
  tft.fillRect(0, 160 , 240, 240, BLUE);
  delay (1000);

   // large block of text
  tft.fillScreen(BLACK);
  testdrawtext("Lorem ipsum dolor sit amet, consectetur adipiscing elit. Curabitur adipiscing ante sed nibh tincidunt feugiat. Maecenas enim massa, fringilla sed malesuada et, malesuada sit amet turpis. Sed porttitor neque ut ante pretium vitae malesuada nunc bibendum. Nullam aliquet ultrices massa eu hendrerit. Ut sed nisi lorem. In vestibulum purus a tortor imperdiet posuere. ", WHITE);
  delay(1000);

  // a single pixel
  tft.drawPixel(tft.width()/2, tft.height()/2, GREEN);
  delay(1000);

  // line draw test
  testlines(YELLOW);
  delay(1000);

  // optimized lines
  testfastlines(RED, BLUE);
  delay(1000);

  testdrawrects(GREEN);
  delay(1000);

  testfillrects(YELLOW, MAGENTA);
  delay(1000);

  tft.fillScreen(BLACK);
  testfillcircles(10, BLUE);
  testdrawcircles(10, WHITE);
  delay(1000);

  testroundrects();
  delay(1000);

  testtriangles();
  delay(1000);

  mediabuttons();
  delay(1000);
}
//===============================================================================
//  Main
//===============================================================================
void loop() {
 
  tft.invertDisplay(true);
  delay(500);
  tft.invertDisplay(false);
  delay(500);
}
//===============================================================================
//  Subroutines
//===============================================================================
void testlines(uint16_t color) {
  tft.fillScreen(BLACK);
  for (int16_t x=0; x < tft.width(); x+=6) {
    tft.drawLine(0, 0, x, tft.height()-1, color);
  }
  for (int16_t y=0; y < tft.height(); y+=6) {
    tft.drawLine(0, 0, tft.width()-1, y, color);
  }
}

void testdrawtext(char *text, uint16_t color) {
  tft.setCursor(0, 0);
  tft.setTextColor(color);
  tft.setTextWrap(true);
  tft.print(text);
}

void testfastlines(uint16_t color1, uint16_t color2) {
  tft.fillScreen(BLACK);
  for (int16_t y=0; y < tft.height(); y+=5) {
    tft.drawFastHLine(0, y, tft.width(), color1);
  }
  for (int16_t x=0; x < tft.width(); x+=5) {
    tft.drawFastVLine(x, 0, tft.height(), color2);
  }
}

void testdrawrects(uint16_t color) {
  tft.fillScreen(BLACK);
  for (int16_t x=0; x < tft.width(); x+=6) {
    tft.drawRect(tft.width()/2 -x/2, tft.height()/2 -x/2 , x, x, color);
  }
}

void testfillrects(uint16_t color1, uint16_t color2) {
  tft.fillScreen(BLACK);
  for (int16_t x=tft.width()-1; x > 6; x-=6) {
    tft.fillRect(tft.width()/2 -x/2, tft.height()/2 -x/2 , x, x, color1);
    tft.drawRect(tft.width()/2 -x/2, tft.height()/2 -x/2 , x, x, color2);
  }
}

void testfillcircles(uint8_t radius, uint16_t color) {
  for (int16_t x=radius; x < tft.width(); x+=radius*2) {
    for (int16_t y=radius; y < tft.height(); y+=radius*2) {
      tft.fillCircle(x, y, radius, color);
    }
  }
}

void testdrawcircles(uint8_t radius, uint16_t color) {
  for (int16_t x=0; x < tft.width()+radius; x+=radius*2) {
    for (int16_t y=0; y < tft.height()+radius; y+=radius*2) {
      tft.drawCircle(x, y, radius, color);
    }
  }
}

void testtriangles() {
  tft.fillScreen(BLACK);
  int color = 0xF800;
  int t;
  int w = tft.width()/2;
  int x = tft.height()-1;
  int y = 0;
  int z = tft.width();
  for(t = 0 ; t <= 15; t++) {
    tft.drawTriangle(w, y, y, x, z, x, color);
    x-=4;
    y+=4;
    z-=4;
    color+=100;
  }
}

void testroundrects() {
  tft.fillScreen(BLACK);
  int color = 100;
  int i;
  int t;
  for(t = 0 ; t <= 4; t+=1) {
    int x = 0;
    int y = 0;
    int w = tft.width()-2;
    int h = tft.height()-2;
    for(i = 0 ; i <= 16; i+=1) {
      tft.drawRoundRect(x, y, w, h, 5, color);
      x+=2;
      y+=3;
      w-=4;
      h-=6;
      color+=1100;
    }
    color+=100;
  }
}

void mediabuttons() {
  // play
  tft.fillScreen(BLACK);
  tft.fillRoundRect(25, 10, 78, 60, 8, WHITE);
  tft.fillTriangle(42, 20, 42, 60, 90, 40, RED);
  delay(500);
  // pause
  tft.fillRoundRect(25, 90, 78, 60, 8, WHITE);
  tft.fillRoundRect(39, 98, 20, 45, 5, GREEN);
  tft.fillRoundRect(69, 98, 20, 45, 5, GREEN);
  delay(500);
  // play color
  tft.fillTriangle(42, 20, 42, 60, 90, 40, BLUE);
  delay(50);
  // pause color
  tft.fillRoundRect(39, 98, 20, 45, 5, RED);
  tft.fillRoundRect(69, 98, 20, 45, 5, RED);
  // play color
  tft.fillTriangle(42, 20, 42, 60, 90, 40, GREEN);
}

And this is what I have based on the pinouts I found of the wemos.
Code: Select all#define TFT_DC    0     // Data/Command
#define TFT_RST   4     // ST7789 Reset
#define TFT_MOSI  13    // SPI data pin
#define TFT_SCLK  14    // SPI sclk pin

I'm also using the library in the link.

Any ideas what's going wrong. Because the IDE is not giving me an error so I'm guessing it's the wiring.