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У меня возникли проблемы с выходом на ЖК-дисплей.Beaglebone Black Последовательный порт JAVASCRIPT
var usblcd = require('./usblcdmo');
var express = require('express');
var app = express();
var fs = require('fs');
var indexhtml = fs.readFileSync('./index.html');
app.get('^/$', function (req, res) {
res.end(indexhtml, {'Content-Type': 'text/html'});
});
app.get(/^\/clearscreen$/, function(req, res) {
console.log('clearscreen');
usblcd.clearscreen();
res.end(indexhtml, {'Content-Type': 'text/html'});
});
app.get(/^\/backlight\/(\d)$/, function(req, res) {
var option = req.params[0];
console.log('backlight ' + option);
usblcd.backlight(option);
res.end(indexhtml, {'Content-Type': 'text/html'});
});
app.get(/^\/blockcursor\/(\d+)$/, function(req, res) {
var option = req.params[0];
console.log('blockcursor ' + option);
usblcd.backlight(option);
res.end(indexhtml, {'Content-Type': 'text/html'});
});
app.get(/^\/contrast\/(\d+)$/, function(req, res) {
var option = req.params[0];
console.log('contrast ' + option);
usblcd.contrast(option);
res.end(indexhtml, {'Content-Type': 'text/html'});
});
app.get(/^\/brightness\/(\d+)$/, function(req, res) {
var option = req.params[0];
console.log('brightness ' + option);
usblcd.brightness(option);
res.end(indexhtml, {'Content-Type': 'text/html'});
});
app.get(/^\/backlightRGB\/(\d+)\/(\d+)\/(\d+)$/, function(req, res) {
var red = req.params[0];
var green = req.params[1];
var blue = req.params[2];
console.log('backlightRGB ' + red + ' ' + green + ' ' + blue);
usblcd.backlightRGB(red, green, blue);
res.end(indexhtml, {'Content-Type': 'text/html'});
});
app.get(/^\/show\/(.*)$/, function(req, res) {
var option = req.params[0];
console.log('show ' + option);
usblcd.show(option);
res.end(indexhtml, {'Content-Type': 'text/html'});
});
app.get('^/quote1$', function(req, res) {
usblcd.clearscreen();
usblcd.show('node.js, use the force');
res.end(indexhtml, {'Content-Type': 'text/html'});
});
app.get('^/quote2$', function(req, res) {
usblcd.clearscreen();
usblcd.show('node.js, phone home');
res.end(indexhtml, {'Content-Type': 'text/html'});
});
app.get('^/quote3$', function(req, res) {
usblcd.clearscreen();
usblcd.show('node.js, make my day');
res.end(indexhtml, {'Content-Type': 'text/html'});
});
app.get('^/quote4$', function(req, res) {
usblcd.clearscreen();
usblcd.show('Houston, we havea node.js');
res.end(indexhtml, {'Content-Type': 'text/html'});
});
app.get('^/quote5$', function(req, res) {
usblcd.clearscreen();
usblcd.show('node.js, you are our only hope');
res.end(indexhtml, {'Content-Type': 'text/html'});
});
app.listen(4000);
console.log('Listening on port 4000');
usblcd.clearscreen();
usblcd.backlight(true);
usblcd.brightness(255);
usblcd.contrast(200);
usblcd.autoscroll(true);
usblcd.backlightRGB(0,255,0);
var now = new Date();
usblcd.show(now.toDateString() + ' ' + now.toTimeString().slice(0, 8));
И этот сценарий:
'use strict';
var SerialPort = require("serialport").SerialPort;
var serialPort = new SerialPort("/dev/ttyACM0", { baudrate: 57600 });
var Open = false;
var SaveBuffer = new Buffer(1024);
var SaveLen = 0;
function sp_write(data) {
if (Open) {
serialPort.write(data, function(err, results) {
console.log('err ' + err + ' results ' + results);
});
}
else {
if (Buffer.isBuffer(data)) {
data.copy(SaveBuffer, SaveLen);
SaveLen += data.length;
}
else {
new Buffer(data).copy(SaveBuffer, SaveLen);
SaveLen += data.length;
}
//console.log('SaveLen ' + SaveLen);
}
}
function show(data) {
console.log('show ' + data);
sp_write(data);
}
serialPort.on("open", function() {
Open = true;
serialPort.on("data", function (data) {
console.log('serialPort data');
});
serialPort.on("close", function (data) {
console.log('serialPort close');
});
//console.log('SaveBuffer ' + SaveBuffer.slice(0, SaveLen));
console.log('open, sending buffered data ' + SaveLen);
serialPort.write(SaveBuffer.slice(0, SaveLen), function(err, results) {
console.log('err ' + err + ' results ' + results);
});
SaveLen = 0;
});
function backlight(data) {
console.log('backlight ' + data);
if (data === true || data === 1) {
sp_write([0xFE, 0x42, 0x00]);
}
else {
sp_write([0xFE, 0x46]);
}
}
function brightness(bright) {
console.log('brightness ' + bright);
sp_write([0xFE, 0x99, bright]);
}
function contrast(contr) {
console.log('contrast ' + contr);
sp_write([0xFE, 0x50, contr]);
}
function clearscreen() {
console.log('clearscreen');
sp_write([0xFE, 0x58]);
}
function gotoxy(row,col) {
console.log('gotoxy ' + row + ' ' + col);
sp_write([0xFE, 0x47, row, col]);
}
function binarychoice(featurename, onCode, offCode, data) {
console.log(featurename + ' ' + data);
if (data === true || data === 1) {
sp_write([0xFE, onCode]);
}
else {
sp_write([0xFE, offCode]);
}
}
function autoscroll(data) {
binarychoice('autoscroll', 0x51, 0x52, data);
}
function underlinecursor(data) {
binarychoice('underlinecursor', 0x4A, 0x4B, data);
}
function blockcursor(data) {
binarychoice('blockcursor', 0x53, 0x54, data);
}
function backlightRGB(red, green, blue) {
console.log('backlightRGB ' + red + ' ' + green + ' ' + blue);
sp_write([0xFE, 0xD0, red, green, blue]);
}
exports.show = show;
exports.backlight = backlight;
exports.brightness = brightness;
exports.contrast = contrast;
exports.clearscreen = clearscreen;
exports.gotoxy = gotoxy;
exports.autoscroll = autoscroll;
exports.underlinecursor = underlinecursor;
exports.blockcursor = blockcursor;
exports.backlightRGB = backlightRGB;
Ошибка заключается в следующем
Error: Cannot find module 'serialport'
at Function.Module._resolveFilename (module.js:338:15)
at Function.Module._load (module.js:280:25)
at Module.require (module.js:364:17)
at require (module.js:380:17)
at Object. (/var/lib/stickshift/52e570dee0b8cdcdb7000005/app-root/data/752908/testlcd/usblcdmo.js:3:18)
at Module._compile (module.js:456:26)
at Object.Module._extensions..js (module.js:474:10)
at Module.load (module.js:356:32)
at Function.Module._load (module.js:312:12)
at Module.require (module.js:364:17)
Я предполагаю, что мне нужен серийный код порта, поскольку он призван. Я не уверен, как это сделать. Beaglebone black - это микропроцессор, который я пытаюсь сделать вывод на ЖК-дисплей.