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added delay to ensure OLED is initialized upon cold boot

This commit is contained in:
Agent725 2025-11-08 19:55:00 +01:00
parent ef76c8f579
commit 5e1a34c9d7
1 changed files with 41 additions and 38 deletions
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47
codingExamples/screensaver.js
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@ -2,28 +2,30 @@
* SCREENSAVER: bounces a nice little text over the screen
*/
// offsets must be defined for correct display on screen!
const Xoffset = 8;
const Yoffset = 8;
// for some reason the OLED screen needs this timeout
setTimeout(function() {
// offsets must be defined for correct display on screen!
const Xoffset = 8;
const Yoffset = 8;
// define the function first, before using it below
function displayText(textString, x,y) {
// define the function first, before using it below
function displayText(textString, x, y) {
// write some text
scrn.drawString(textString, Xoffset + x, Yoffset + y);
// write to the screen
scrn.flip();
// clear a bit of the screen in preparation before next update
scrn.clearRect(Xoffset + x, Yoffset + y, Xoffset + x + 30, Yoffset + y + 8);
}
}
// MAIN FUNCTION: bounce text and flash LED (D8)
let on = false;
let x = 0;
let y = 0;
let ix = 1;
let iy = 1;
const txt = 'HELLO';
function main() {
// MAIN: flash LED (D8)
let on = false;
let x = 0;
let y = 0;
let ix = 1;
let iy = 1;
const txt = 'HELLO';
function go() {
setInterval(function() {
on = !on;
digitalWrite("D8",on);
@ -33,14 +35,15 @@ function main() {
if (y > 34) iy = -iy;
if (x < 1) ix = -ix;
if (y < 1) iy = -iy;
displayText(txt,x,y);
displayText(txt, x, y);
}, 100);
}
}
//
// required modules/libraries (in Espruino must be included at the end due to needing functions)
//
I2C1.setup({scl:"D6",sda:"D5"}); // I2C setup
// initialize the screen and its dimensions (null can be replaced by a callback)
const scrn = require("SSD1306").connect(I2C1, main, { width:72, height:48 }); // for 72x48 LCD
//
// required modules/libraries (in Espruino must be included at the end due to needing functions)
//
I2C1.setup({scl:"D6",sda:"D5"}); // I2C setup
// initialize the screen and its dimensions (null can be replaced by a callback)
const scrn = require("SSD1306").connect(I2C1, main, { width:72, height:48 }); // for 72x48 LCD
}, 5000);