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54 lines
1.4 KiB
JavaScript
54 lines
1.4 KiB
JavaScript
/*
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* Author: Mihai Tudor Panu <mihai.tudor.panu@intel.com>
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* Copyright (c) 2015 Intel Corporation.
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*
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* This program and the accompanying materials are made available under the
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* terms of the The MIT License which is available at
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* https://opensource.org/licenses/MIT.
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*
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* SPDX-License-Identifier: MIT
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*/
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// Some vars
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var colon = true;
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var interval;
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// Load display
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var tm1637 = require('jsupm_tm1637');
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// Instantiate on pins 0 (Clk) and 1 (Dio)
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var display = new tm1637.TM1637(0, 1);
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// Get the current time
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var now = new Date();
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console.log("System time: " + now.getHours() + ":" + ("0" + now.getMinutes()).slice(-2));
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console.log("Time zone can be changed by setting the TZ environment variable.");
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// Display and time update function
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function update(){
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now = new Date();
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var time = now.getHours().toString() + ("0" + now.getMinutes().toString()).slice(-2);
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display.writeString(time);
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display.setColon(colon = !colon);
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}
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// Start with a 7-segment encoded box on the display
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display.write(0x39, 0x09, 0x09, 0x0f);
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// Start displaying the clock after 3 seconds
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setTimeout(function(){
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// And update every second thereafter
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interval = setInterval(update, 1000);
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}, 3000)
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// Exit handler
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process.on('SIGINT', function()
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{
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clearInterval(interval);
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display = null;
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tm1637.cleanUp();
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tm1637 = null;
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console.log("Interrupt received, exiting...");
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process.exit(0);
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});
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