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  • Pure JS:

    /* Copyright (c) 2020 Akos Lukacs, based on code by Gordon Williams and https://github.com/Bodmer/TFT_eSPI. See the file LICENSE for copying permission. */
    /*
    Module for the ST7789 135x240 LCD controller
    
    Just:
    */
    
    
    var spi = new SPI();
    spi.setup({sck:D2,mosi:D3,mode:0}); //spi.send([0xab],D5); 
    
    const LCD_WIDTH = 240;
    const LCD_HEIGHT = 240;
    const COLSTART = 0;
    const ROWSTART = 0;
    
    
    function init(spi, dc, ce, rst, callback) {
      function cmd(c, d) {
          dc.reset();
          spi.write(c, ce);
          if (d !== undefined) {
              dc.set();
              spi.write(d, ce);
          }
      }
    
      if (rst) {
          digitalPulse(rst, 0, 10);
      } else {
          cmd(0x01); //Software reset
      }
      
      /* SN80 specific */
      const ST7789_INIT_CODE = [
      [0xFE],
      [0xEF],
      [0xEB,0x14],
      [0x84,0x40],
      [0x85,0xF1],
      [0x86,0x98],
      [0x87,0x28],
      [0x88,0xA],
      [0x8A,0],
      [0x8B,0x80],
      [0x8C,1],
      [0x8D,0],
      [0x8E,0xDF],
      [0x8F,82],
      [0xB6,0x20],
      [0x36,0x48],
      [0x3A,5],
      [0x90,[8,8,8,8]],
      [0xBD,6],
      [0xA6,0x74],
      [0xBF,0x1C],
      [0xA7,0x45],
      [0xA9,0xBB],
      [0xB8,0x63],
      [0xBC,0],
      [0xFF,[0x60,1,4]],
      [0xC3,0x17],
      [0xC4,0x17],
      [0xC9,0x25],
      [0xBE,0x11],
      [0xE1,[0x10,0xE]],
      [0xDF,[0x21,0x10,2]],
      [0xF0,[0x45,9,8,8,0x26,0x2A]],
      [0xF1,[0x43,0x70,0x72,0x36,0x37,0x6F]],
      [0xF2,[0x45,9,8,8,0x26,0x2A]],
      [0xF3,[0x43,0x70,0x72,0x36,0x37,0x6F]],
      [0xED,[0x1B,0xB]],
      [0xAC,0x47],
      [0xAE,0x77],
      [0xCB,2],
      [0xCD,0x63],
      [0x70,[7,9,4,0xE,0xF,9,7,8,3]],
      [0xE8,0x34],
      [0x62,[0x18,0xD,0x71,0xED,0x70,0x70,0x18­,0x0F,0x71,0xEF,0x70,0x70]],
      [0x63,[0x18,0x11,0x71,0xF1,0x70,0x70,0x1­8,0x13,0x71,0xF3,0x70,0x70]],
      [0x64,[0x28,0x29,1,0xF1,0,7,0xF1]],
      [0x66,[0x3C,0,0xCD,0x67,0x45,0x45,0x10,0­,0,0]],
      [0x67,[0,0x3C,0,0,0,1,0x54,0x10,0x32,0x9­8]],
      [0x74,[0x10,0x80,0x80,0,0,0x4E,0]],
      [0x35,0],
      [0x21],
        ];
    
        setTimeout(function () {
            //cmd(0x11); //Exit Sleep
            setTimeout(function () {
                ST7789_INIT_CODE.forEach(function (e) {
                    cmd(e[0], e[1]);
                });
                setTimeout(()=>{  //delay_0(120);
                  cmd(0x11); }, 120);
                setTimeout(()=>{    //delay_0(120);
                  cmd(0x29);}, 240);
                setTimeout(()=>{  //delay_0(120);
                  cmd(0x2A,[0,0,0,0xEF]);
                  cmd(0x2B,[0,0,0,0xEF]);
                  cmd(0x2C);}, 360);
    
                if (callback) setTimeout(callback, 500);
            }, 20);
        }, 120);
       /**/
    }
    
    
    let connect = function (spi, dc, ce, rst, callback) {
        var g = Graphics.createCallback(LCD_WIDTH, LCD_HEIGHT, 16, {
            setPixel: function (x, y, c) {
                ce.reset();
                spi.write(0x2A, dc);
                spi.write((COLSTART + x) >> 8, COLSTART + x, (COLSTART + x) >> 8, COLSTART + x);
                spi.write(0x2B, dc);
                spi.write((ROWSTART + y) >> 8, ROWSTART + y, (ROWSTART + y) >> 8, (ROWSTART + y));
                spi.write(0x2C, dc);
                spi.write(c >> 8, c);
                ce.set();
            },
            fillRect: function (x1, y1, x2, y2, c) {
                ce.reset();
                spi.write(0x2A, dc);
                spi.write((COLSTART + x1) >> 8, COLSTART + x1, (COLSTART + x2) >> 8, COLSTART + x2);
                spi.write(0x2B, dc);
                spi.write((ROWSTART + y1) >> 8, ROWSTART + y1, (ROWSTART + y2) >> 8, (ROWSTART + y2));
                spi.write(0x2C, dc);
                spi.write({ data: String.fromCharCode(c >> 8, c), count: (x2 - x1 + 1) * (y2 - y1 + 1) });
                ce.set();
            }
        });
        init(spi, dc, ce, rst, callback);
        return g;
    };
    
    var img = {
      width : 206, height : 96, bpp : 2,
      transparent : -1,
      palette : new Uint16Array([0,65535,6339,61277]),
      buffer : require("heatshrink").decompress(atob("A­E8LqoAD8AyrgXVGQdWM1ktMwlwM2NXwBmxvBm/M3­4ASgYyEM1s1GYlYGVcLGQlVM1m1GQlcM2XgM2NeM­35m/ACUJMwtgGdeVGQlWGVcNM2MC6oyEq+AGdUlM­wt4GVUDGQtV4Azq2ouBr/1AYNcGVULZAP+1W/aQP­gEzuoBZUC6tf1QFB1X1q+ABgWqAAIGDACUJXJQyB­vwlDgQzB3AFBh////+Ga2cZhdeEggzBrqbCagNVv­xmhlqSEAAMK6oICg6ZB394M0ELGQwzCrwEBF4WtN­oRmdZgIiHhdVuBmBH4W3M0G1RJEtqxmEgXYMz8tR­4QAE0A9DMwctdRRmUgXXZg0uBQhzD7xmf2rMGhYH­BhpxBMwcJbw5mXhtcBA24HwVwMwmeMzyZIl4HBBY­RmDhrNfmtgHYyPCTQRmCgXcMz0LEwKZIbIRmDOAR­mdTJBqDqxmDhbTBMzsteQYACgaZCBgRmChXeGShm­JLISZJOYV61Wq+54DhWu1EC0ABBBoIWD1XqwEqMw­kq/+oBwU1LwaZGSgNYgv///1vQyD/tf9G+CgOv//­6DYf1/+C+BmDlfVCoKRCrxuGHQm14FfGYP9vwOC7­46B9fggV9v/9XIUvv//72nMwcLv/r+onCEoKZKhd­e06LB1W9EwW31Eq+5mBkv+BgIjBhd+0Grv1wMwUC­72gCoK3BRgKZGYQanBv4uCIwImBloCBNIJmBr2Ag­Q4BFIIbBlt3Mwe3BAMK7wfCFYiZGgVVq4ODDQMLH­QRzBMwIVBgYJBm4TClpmDJAQVBBAMJK4YAClAFEk­tVBwcC/BZBAwQhBgQNCk+AhIpCgXXMwQODIAeXMw­oyFMwwsBloGDG4IvBCQPYA4RdEMwO3EQYPBhpmFh­egMxUA3xQEhZmBFAI/BwDoEm5mChPq1QAB1rUB65­mF3RmLgdgEII5DMwJWDVAIZD+BmCy//AAR0BZo0C­aYpmGmw0BMx8vMwdVAAbbBZow0B1BmLmwSDnxmGI­wZmEzyZC1QnBhdYZouA3/oMy8nMxBhBAAm1Mws4l­2qBAUDq/3ZreeGQsLrgGEgeCIQm19RmE3yNEZphE­BMwIQBGYs1A4s4DAhABg4GDhvgRohmGgHeDIY9BM­wO2GQsDrwGFZoIlDU4LtE/ECEwctMwzEEy5mCgYc­DlzzCMw0C3wzCht4Mwm3KoIdChZNBMws3CYUtMwZ­EBCoVgCQPXEgZmCgG4D4QMBJIetDQOnAQMC6pmGO­Ycru5mCgCKCBgZZBMwo/BCQJzCMwevCQJJD2/+Mw­0LvwCB75mDgQIBgX3EAW1TQkDxWA3jaEr////9Sw­fX9X19ZmGAQN/1/f05mDhdf1f3FwQmCMwku1Y/Cy­vAgtVAAP6B4Ur6tV/G+Mw0A3tVr+iMwcAl4cB9Ac­ClqaEgeC34/CBYWqAAQQDlf//UKMwLxDVYf/0A9B­hQIC1f/GQcAW4RmDgWoDwVXOQgATgakCABELTQkD­HAjZFACk2BhaaFnAKJACCACLIJNLgXVBoZmETK0J­EAfeCJYoBFwcoHolgGam+AYUvXQiaIZwjMEMysCv­RYCWhu1Bw8tqqyLABMvvWq1aZMSAX4DQ1VJZoAI3­v///fTJh1BqvoA4krqpLNKhO9qtX0ASNltXSIkr6­trJZoAJlf+DJ7FB/QSBgWvTC4AU2tV/2q1X9qteG­VUDqtVr//+oEBTC4ATmouBAAdYGVUCGQtXM1ctGY­twGVUA6oyEqwyrhJmFsAzryoyErwyrhZmF8Azr2p­m/M1dcM2WAM2NYGVcDGQlXM1k1GYl4GVcC6pmxlp­m/M1dwM2QyrMw1gGdm1GQdeBQg="))
    };
    /**/
    var g = connect(spi, D18, D25, D26, function() {
      digitalWrite(D23,0);
      g.clear();
      //g.setRotation(1);
     // g.drawString("Hello",0,0);
      //g.setFontVector(20);
      
      g.setColor(0.5,1,1);
      g.setFont("6x8",1);
      
      g.setFontAlign(0,0);
      g.drawString("Espruino",120,20);
      g.setFontVector(12);
      g.drawString("Espruino",120,40);
      
      g.drawCircle(60,40,20);
      g.fillCircle(180,40,20);
      g.setColor(1,0,1);
      g.drawRect(40,75,80,100);
      g.fillRect(160,75,200,100);
      g.setColor(1,1,0);
      g.drawPoly([70,130,80,110,90,130,100,110­,110,130, 110,140,70,140], true);
      g.fillPoly([130,130,140,110,150,130,160,­110,170,130, 170,140,130,140], true);
      g.setColor(0.5,0.5,1);
      for(let x = 90; x < 120; x+=5) {
        g.drawLine(x, 60, x, 90);
      }
      for(let y = 60; y < 90; y+=5) {
        g.drawLine(125, y, 155, y);
      }
      g.drawImage(img,20,144);
      });
    

    lcd_spi_unbuf version:

    const logD = console.log;
    
    let batV=() => {
      return 7.1 * analogRead(D31);
    };
    
    //var spi = new SPI();
    SPI1.setup({sck:D2,mosi:D3,baud:8000000,­mode:0}); //spi.send([0xab],D5); 
    
    const LCD_WIDTH = 240;
    const LCD_HEIGHT = 240;
    const COLSTART = 0;
    const ROWSTART = 0;
    const INVERSE = 0;
    
    
      /* SN80 specific */
    const ST7789_INIT_CODE = [
      [0xFE],
      [0xEF],
      [0xEB,0x14],
      [0x84,0x40],
      [0x85,0xF1],
      [0x86,0x98],
      [0x87,0x28],
      [0x88,0xA],
      [0x8A,0],
      [0x8B,0x80],
      [0x8C,1],
      [0x8D,0],
      [0x8E,0xDF],
      [0x8F,82],
      [0xB6,0x20],
      [0x36,0x48],
      [0x3A,5],
      [0x90,[8,8,8,8]],
      [0xBD,6],
      [0xA6,0x74],
      [0xBF,0x1C],
      [0xA7,0x45],
      [0xA9,0xBB],
      [0xB8,0x63],
      [0xBC,0],
      [0xFF,[0x60,1,4]],
      [0xC3,0x17],
      [0xC4,0x17],
      [0xC9,0x25],
      [0xBE,0x11],
      [0xE1,[0x10,0xE]],
      [0xDF,[0x21,0x10,2]],
      [0xF0,[0x45,9,8,8,0x26,0x2A]],
      [0xF1,[0x43,0x70,0x72,0x36,0x37,0x6F]],
      [0xF2,[0x45,9,8,8,0x26,0x2A]],
      [0xF3,[0x43,0x70,0x72,0x36,0x37,0x6F]],
      [0xED,[0x1B,0xB]],
      [0xAC,0x47],
      [0xAE,0x77],
      [0xCB,2],
      [0xCD,0x63],
      [0x70,[7,9,4,0xE,0xF,9,7,8,3]],
      [0xE8,0x34],
      [0x62,[0x18,0xD,0x71,0xED,0x70,0x70,0x18­,0x0F,0x71,0xEF,0x70,0x70]],
      [0x63,[0x18,0x11,0x71,0xF1,0x70,0x70,0x1­8,0x13,0x71,0xF3,0x70,0x70]],
      [0x64,[0x28,0x29,1,0xF1,0,7,0xF1]],
      [0x66,[0x3C,0,0xCD,0x67,0x45,0x45,0x10,0­,0,0]],
      [0x67,[0,0x3C,0,0,0,1,0x54,0x10,0x32,0x9­8]],
      [0x74,[0x10,0x80,0x80,0,0,0x4E,0]],
      [0x35,0],
      [0x21],
      [0x29],
        ];
    
    function ST7789() {
        var LCD_WIDTH = 240;
        var LCD_HEIGHT = 240;
        var XOFF = 0;
        var YOFF = 0;
        var INVERSE = 1;
        var cmd = lcd_spi_unbuf.command;
      
        function dispinit(spi, dc, ce, rst, fn) {
    
          if (rst) {
              digitalPulse(rst,0,10);
          } else {
              cmd(0x01); //ST7789_SWRESET: Software reset, 0 args, w/delay: 150 ms delay
          }
          setTimeout(function() {
            cmd(0x11); //SLPOUT
            setTimeout(function () {
                ST7789_INIT_CODE.forEach(function (e) {
                    cmd(e[0], e[1]);
                });
    
                if (fn) setTimeout(fn, 500);
                
            }, 20);
          }, 120);
          return cmd;
        }
    
        function connect(options , callback) {
            var spi=options.spi, dc=options.dc, ce=options.cs, rst=options.rst;
            var g = lcd_spi_unbuf.connect(options.spi, {
                dc: options.dc,
                cs: options.cs,
                height: LCD_HEIGHT,
                width: LCD_WIDTH,
                colstart: XOFF,
                rowstart: YOFF
            });
            g.lcd_sleep = function(){cmd(0x10);cmd(0x28);};
            g.lcd_wake = function(){cmd(0x29);cmd(0x11);};
            dispinit(spi, dc, ce, rst);
            //g.cmd = cmd;
            return g;
        }
    
        //var spi = new SPI();
        SPI1.setup({sck:D2, mosi:D3, baud: 8000000});
    
        return connect({spi:SPI1, dc:D18, cs:D25, rst:D26});
    }
    
    //screen brightness function
    function brightness(v) {
        v=v>7?1:v;
    digitalWrite([D23,D22,D14],7-v);
    }
    
    let g = ST7789();
    brightness(7);
    
    
    
    var img = {
      width : 206, height : 96, bpp : 2,
      transparent : -1,
      palette : new Uint16Array([0,65535,6339,61277]),
      buffer : require("heatshrink").decompress(atob("A­E8LqoAD8AyrgXVGQdWM1ktMwlwM2NXwBmxvBm/M3­4ASgYyEM1s1GYlYGVcLGQlVM1m1GQlcM2XgM2NeM­35m/ACUJMwtgGdeVGQlWGVcNM2MC6oyEq+AGdUlM­wt4GVUDGQtV4Azq2ouBr/1AYNcGVULZAP+1W/aQP­gEzuoBZUC6tf1QFB1X1q+ABgWqAAIGDACUJXJQyB­vwlDgQzB3AFBh////+Ga2cZhdeEggzBrqbCagNVv­xmhlqSEAAMK6oICg6ZB394M0ELGQwzCrwEBF4WtN­oRmdZgIiHhdVuBmBH4W3M0G1RJEtqxmEgXYMz8tR­4QAE0A9DMwctdRRmUgXXZg0uBQhzD7xmf2rMGhYH­BhpxBMwcJbw5mXhtcBA24HwVwMwmeMzyZIl4HBBY­RmDhrNfmtgHYyPCTQRmCgXcMz0LEwKZIbIRmDOAR­mdTJBqDqxmDhbTBMzsteQYACgaZCBgRmChXeGShm­JLISZJOYV61Wq+54DhWu1EC0ABBBoIWD1XqwEqMw­kq/+oBwU1LwaZGSgNYgv///1vQyD/tf9G+CgOv//­6DYf1/+C+BmDlfVCoKRCrxuGHQm14FfGYP9vwOC7­46B9fggV9v/9XIUvv//72nMwcLv/r+onCEoKZKhd­e06LB1W9EwW31Eq+5mBkv+BgIjBhd+0Grv1wMwUC­72gCoK3BRgKZGYQanBv4uCIwImBloCBNIJmBr2Ag­Q4BFIIbBlt3Mwe3BAMK7wfCFYiZGgVVq4ODDQMLH­QRzBMwIVBgYJBm4TClpmDJAQVBBAMJK4YAClAFEk­tVBwcC/BZBAwQhBgQNCk+AhIpCgXXMwQODIAeXMw­oyFMwwsBloGDG4IvBCQPYA4RdEMwO3EQYPBhpmFh­egMxUA3xQEhZmBFAI/BwDoEm5mChPq1QAB1rUB65­mF3RmLgdgEII5DMwJWDVAIZD+BmCy//AAR0BZo0C­aYpmGmw0BMx8vMwdVAAbbBZow0B1BmLmwSDnxmGI­wZmEzyZC1QnBhdYZouA3/oMy8nMxBhBAAm1Mws4l­2qBAUDq/3ZreeGQsLrgGEgeCIQm19RmE3yNEZphE­BMwIQBGYs1A4s4DAhABg4GDhvgRohmGgHeDIY9BM­wO2GQsDrwGFZoIlDU4LtE/ECEwctMwzEEy5mCgYc­DlzzCMw0C3wzCht4Mwm3KoIdChZNBMws3CYUtMwZ­EBCoVgCQPXEgZmCgG4D4QMBJIetDQOnAQMC6pmGO­Ycru5mCgCKCBgZZBMwo/BCQJzCMwevCQJJD2/+Mw­0LvwCB75mDgQIBgX3EAW1TQkDxWA3jaEr////9Sw­fX9X19ZmGAQN/1/f05mDhdf1f3FwQmCMwku1Y/Cy­vAgtVAAP6B4Ur6tV/G+Mw0A3tVr+iMwcAl4cB9Ac­ClqaEgeC34/CBYWqAAQQDlf//UKMwLxDVYf/0A9B­hQIC1f/GQcAW4RmDgWoDwVXOQgATgakCABELTQkD­HAjZFACk2BhaaFnAKJACCACLIJNLgXVBoZmETK0J­EAfeCJYoBFwcoHolgGam+AYUvXQiaIZwjMEMysCv­RYCWhu1Bw8tqqyLABMvvWq1aZMSAX4DQ1VJZoAI3­v///fTJh1BqvoA4krqpLNKhO9qtX0ASNltXSIkr6­trJZoAJlf+DJ7FB/QSBgWvTC4AU2tV/2q1X9qteG­VUDqtVr//+oEBTC4ATmouBAAdYGVUCGQtXM1ctGY­twGVUA6oyEqwyrhJmFsAzryoyErwyrhZmF8Azr2p­m/M1dcM2WAM2NYGVcDGQlXM1k1GYl4GVcC6pmxlp­m/M1dwM2QyrMw1gGdm1GQdeBQg="))
    };
    /**/
    
    setTimeout(()=>{
      g.clear();
      g.setColor(0.5,1,1);
      g.setFont("6x8",1);
      
      g.setFontAlign(0,0);
      g.drawString("Espruino",120,20);
      g.setFontVector(12);
      g.drawString("Espruino",120,40);
      
      g.drawCircle(60,40,20);
      g.fillCircle(180,40,20);
      g.setColor(1,0,1);
      g.drawRect(40,75,80,100);
      g.fillRect(160,75,200,100);
      g.setColor(1,1,0);
      g.drawPoly([70,130,80,110,90,130,100,110­,110,130, 110,140,70,140], true);
      g.fillPoly([130,130,140,110,150,130,160,­110,170,130, 170,140,130,140], true);
      g.setColor(0.5,0.5,1);
      for(let x = 90; x < 120; x+=5) {
        g.drawLine(x, 60, x, 90);
      }
      for(let y = 60; y < 90; y+=5) {
        g.drawLine(125, y, 155, y);
      }
      g.drawImage(img,20,144);
    
     },500);
    
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