DL1414T - 16 Segment + DP - I just like displays...

Here the code for the 4 character / single module setup and the 8 character / double module setup. Since there is no chip select, the neg-write signal line is used to write to the desired module. Siemens datasheet and clip of running text on single module attached.

// DL1414T_4.js - D SP5-14

// Espruino   DL1414T
// PICO       D SP5-14
// --------   --------
//  1 GND   - GND 7 (black)
//  3 3.3   - Vcc 6 (red)
// 13 A0    - D0  8 LSB (green)
// 14 A1    - D1  9
// 15 A2    - D2 10
// 16 A3    - D3 11
// 17 A4    - D4  2
// 18 A5    - D5  1
// 17 A6    - D6 12 MSB
// 10 B8    - A0  5 (blue)
// 11 B9    - A1  4
// 12 A10   - WR- 3

var dPs = [A6,A5,A4,A3,A2,A1,A0] // data pins
  , aPs = [B9,B8] // address pins
  , wP  = A10
  , txt = "    ESPRUINO    "
  , dgs = 4   // digits
  , pos = -1
  , iTm = 250 // ms
  , iId = null
  ;

function setup() {
  [wP].concat(dPs).concat(aPs).forEach(fun­ction(p){
      pinMode(p,"output"); });
  digitalWrite(dPs,0);
  digitalWrite(aPs,0);
  wP.set();
}

function out(c,a) { // char, address
  digitalWrite(dPs,c); // data bits
  digitalWrite(aPs,a); // addr bits
  wP.reset(); wP.set(); // write- line down and back up again
}

function dsp() {
  pos = (pos < txt.length - dgs - 1) ? pos+1 : 0;
  // console.log(pos,dgs,txt.substr(pos,dgs))­;
  var i = dgs;
  while (i-- > 0) out(txt.charCodeAt(pos+dgs-i-1),i);
}

function onInit() {
  setup();
  iId = setInterval(dsp,iTm);
}

setTimeout(onInit,999); // remove before upload for save()

Double module w/ 8 characters using two (2) write lines:

// DL1414T_8.js - D SP5-14

// Espruino   DL1414T
// PICO       D SP5-14
// --------   --------
//  1 GND   - GND 7 (black)
//  3 3.3   - Vcc 6 (red)
// 13 A0    - D0  8 LSB (green)
// 14 A1    - D1  9
// 15 A2    - D2 10
// 16 A3    - D3 11
// 17 A4    - D4  2
// 18 A5    - D5  1
// 17 A6    - D6 12 MSB
// 10 B8    - A0  5 (blue)
// 11 B9    - A1  4
// 12 A10   - WR- 3 (MD)
//  9 A8    - WR- 3 (LD)

var dPs = [A6,A5,A4,A3,A2,A1,A0] // data pins
  , aPs = [B9,B8]  // address pins
  , wPs = [A10,A8] // write pins
  , txt = "          ESPRUINO          "
  , dgs = 8   // digits
  , pos = -1
  , iTm = 250 // ms
  , iId = null
  ;

function setup() {
  wPs.concat(dPs).concat(aPs).forEach(func­tion(p){
      pinMode(p,"output"); });
  digitalWrite(dPs,0);
  digitalWrite(aPs,0);
  digitalWrite(wPs,3);
}

function out(c,a) { // char, address
  digitalWrite(dPs,c); // data bits
  digitalWrite(aPs,a); // addr bits
  digitalWrite(wPs,(a<4)?2:1); // write- down
  digitalWrite(wPs,3); // write- back up
}

function dsp() {
  pos = (pos < txt.length - dgs - 1) ? pos+1 : 0;
  // console.log(pos,dgs,txt.substr(pos,dgs))­;
  var i = dgs;
  while (i-- > 0) out(txt.charCodeAt(pos+dgs-i-1),i);
}

function onInit() {
  setup();
  txt = "";
  for (var i=32; i<96; i++) txt+=String.fromCharCode(i);
  txt="        *"+txt+"*        ";
  iId = setInterval(dsp,iTm);
}

setTimeout(onInit,999); // remove before upload for save()

2 Attachments

• dl1414t-datasheet-siemens.pdf
• Chars_4.mp4