如何在 jUART 中将 pyserial 发送的 RGB 值复制到 Arduino? [英] How to replicate pyserial sending RGB values to Arduino in jUART?
问题描述
我一直在本地运行的 Python 应用程序中使用 pyserial 将 RGB 值发送到 Arduino，其中:
I have been using pyserial in a locally running Python application to send RGB values to an Arduino with:
import serial
import struct
ser = serial.Serial('/dev/ttyACM0', 9600)
ser.write(struct.pack('>3B', red_value, green_value, blue_value))
# where the rgb values are ints like 77,75, 0
我现在想从非本地网站实现此功能.
I'd like to now achieve this functionality from a non-local website.
jUART 似乎就是为此目的而设计的，即:
jUART seems to be designed for this purpose, ie a:
用于串口通信的跨平台浏览器插件JavaScript
Cross platform browser plugin for serial port communication from JavaScript
它要求用户为他们正在使用的系统和浏览器创建一个插件.
It requires the user to create a plugin for the system and browser they are using.
我已尽我所能按照他们的主 GitHub 页面 上的说明进行操作，但我没有并没有真正了解参数来定义它们的值，而且我之前没有制作过浏览器插件，所以不确定我是否遗漏了什么.
I've followed the instructions on their main GitHub page as far as I could, but I don't really understand the parameters enough to define their values, and I haven't made a browser plugin before so not sure if I am missing something.
我正在使用 Ubuntu 16.04 和 Firefox 48 for Ubuntu 并已复制:
I'm using Ubuntu 16.04 and Firefox 48 for Ubuntu and have copied:
到:
~/.mozilla/extensions
HTML
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Serial Test</title>
<script src="serial.js"></script>
</head>
<body>
</body>
</html>
Javascript (serial.js)
Javascript (serial.js)
//Get a Serial object
var ser = plugin().Serial;
// Open a port
ser.open("/dev/ttyACM0");
// Set port options
/*
baud: Baud rate
parity: 0->none, 1->odd, 2->even
csize: 5 6 7 8
flow: 0->none, 1->software, 2->hardware
stop: 0->one, 1->onepointfive, 2->two
*/
var baud = "";
var parity = "";
var csize = "";
var flow = "";
var stop = "";
ser.set_option(baud, parity, csize, flow, stop);
// Send a byte to serial port
char = "";
ser.send(char);
问题
01) 上面 Javascript 中的空值应该是什么?
01) What should the empty values in the above Javascript be?
02) 我是否还需要遵循 To Build 说明?
02) Do I additionally need to follow the To Build instructions?
03) 我还需要做些什么才能让 jUART 复制上面显示的原始 pyserial 程序?
03) Is there anything else I need to do to get jUART to replicate the original pyserial program shown above?
根据用户建议查看 pyserial 默认值然后复制它们，它们似乎在这里:
Based on user suggestion to look at pyserial defaults and then replicate them, they seem to be here:
https://pythonhosted.org/pyserial/pyserial_api.html#serial.Serial
__init__(port=None, baudrate=9600, bytesize=EIGHTBITS, parity=PARITY_NONE, stopbits=STOPBITS_ONE, timeout=None, xonxoff=False, rtscts=False, write_timeout=None, dsrdtr=False, inter_byte_timeout=None)
因此 jUART 变量可能是:
So perhaps jUART variables would therefore be:
var baud = 9600;
var parity = 0;
var csize = 8; // based on user comment
var flow = 0; // based on user comment
var stop = 0;
当我使用 js 文件中的上述值打开 html 文件时，我在 Firebug 中得到以下内容:
When I open the html file with the above values in the js file, I get the following in Firebug:
ReferenceError: plugin is not defined
ReferenceError: plugin is not defined
Arduino Sketch:(供参考)
// digital output pin numbers
const int digitalOutputPinForRedLED = 9;
const int digitalOutputPinForGreenLED = 10;
const int digitalOutputPinForBlueLED = 11;
// global variables
int valueOfRed = 0;
int valueOfGreen = 0;
int valueOfBlue = 0;
int x = 1;
void setup() {
// initialize serial communications at 9600 bps:
Serial.begin(9600);
// set digital pin modes
pinMode(digitalOutputPinForRedLED,OUTPUT);
pinMode(digitalOutputPinForGreenLED,OUTPUT);
pinMode(digitalOutputPinForBlueLED,OUTPUT);
}
void loop() {
if (Serial.available()) {
if (x==1) {
valueOfRed = Serial.read();
Serial.print("Red: ");
Serial.println(valueOfRed);
analogWrite(digitalOutputPinForRedLED, valueOfRed);
}
else if (x==2) {
valueOfGreen = Serial.read();
Serial.print("Green: ");
Serial.println(valueOfGreen);
analogWrite(digitalOutputPinForGreenLED, valueOfGreen);
}
else if (x==3) {
valueOfBlue = Serial.read();
Serial.print("Blue: ");
Serial.println(valueOfBlue);
analogWrite(digitalOutputPinForBlueLED, valueOfBlue);
}
x++;
}
else {
x = 1;
}
delay(1);
}
推荐答案
查看文档，您唯一遗漏的是将插件添加到 PLUGINS 目录.将已经编译好的插件从 git 复制到 ~/.mozilla/plugins/而不是 ~/.mozilla/extensions
Looking at the documentation, the only thing you missed was adding the plugin to the PLUGINS directory. Copy the already compiled plugin from the git to ~/.mozilla/plugins/ instead of ~/.mozilla/extensions
这篇关于如何在 jUART 中将 pyserial 发送的 RGB 值复制到 Arduino?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
