Getting started alicloud haas510 open board DTU (version 2.0) --510-as

Abstract ： Compared with haas600,haas The team launched haas510 It's cheaper , Within 100 yuan .2.0 Version than 1.0 The version layout is more reasonable ,USB、 Different hardware connectors are used for user serial port and debugging serial port , There will be no danger of MIS insertion . Alibaba cloud officials today provided professional instructions on a page , But some concepts are not easy for beginners to understand . This article uses the way of combining pictures and texts , Take you step by step and let your JavaScript Light applications run smoothly .

  Hardware ：haas510 v2.0（ Silk screen HaaS 510-AS）,USB Serial port module , Matching adapter line

Software ：win7x64,amp,vscode,sscom

This article refers to the document link ：

https://help.aliyun.com/document_detail/277467.html?spm=a2c4g.11186623.6.661.1e441a1fNiMqxd

1. Hardware wiring

As shown in the figure below , Use one USB The serial port is connected through the adapter cable provided in the kit .

Simplified wiring diagram , take MAIN UART And USB Serial port connection .MAIN UART It's pushing JavaScript Code , Used as a push interface , After the push , Can be used in the program as PORT2 Interface , That's the user interface , Use it as an ordinary serial port .

  This wiring has 2 Objective , The first is to supply power to the development board , The power supply voltage of this board is 5V, The core module is moved away EC600S-CN, The power consumption is very small . So you can use it directly USB Serial port 5V Power supply .

haas510 What is provided on the development board is XH2.54 Standard connector for , Four corners are designed with screw holes , So it can be directly installed in your device shell to act as DTU modular .

2. download amp Tools

amp It means AliOS Things Mini Program (AMP).

It literally means Alibaba cloud Internet of things mini（ light ） application , Software specially used for Alibaba cloud IOT hardware .

Its function is to JavaScript Program push to haas In the hardware device , There are many of these devices , Include haas510.

First download amp Tools , Find... Through the help documentation windows edition AMP Tools . Then click download .

Please note that ,AMP Tools are constantly being updated , The latest... Is recommended , Otherwise, it may cause the problem that the program cannot be burned .

The downloaded file is a compressed package , Next we need to unzip .

After decompression, there are two folders , This is different from the previous version , The previous version had only one APP Folder .

How to use this tool ？ The answer is to use windows Command line tools .

Suppose we put this tool under the user folder

C:\Users\Administrator\amp-win

So the steps to use this tool are

Use cmd Command to open window Command line , Enter into your storage amp Folder for tools , Be careful ,amp Tools in dist Under the folder . To invoke this tool , Need cd Entering layer by layer dist Folder . We can go through dir Command to see if it really enters dist Folder . real dist The file directory should be as shown in the following figure .

  It's time to push .

3. Make sure the hardware is working properly

Connect the circuit board to PC Of USB Interface , Start the serial port assistant , Reset the development board .

If the connection of the development board is normal , Then the serial port assistant will display RDY   amp shakehand begin. That is, the development board is ready , Can pass amp The tool shook hands .

 4. push JavaScript Program

haas A prominent feature of the series hardware is that it supports a variety of development methods , You can use c Language , Develop from the bottom .

haas One of the most obvious features is support for JavaScript and Python Two languages , Through the built-in engine of these two languages , bring haas Hardware can develop Internet of things applications through a very small amount of code . This will greatly improve the efficiency of developers .

Alibaba cloud haas The team calls this development approach “ Light application ”.

When we successfully downloaded amp Tools , After connecting the hardware , Let's start pushing “ Light application ” Program .

In success cd To dist After the folder, use the command ：

amp seriallist

You can see the current serial port list , It's on my computer , It is COM52. So the display COM1 and COM3 What is it? ？ It is the serial port equipment of the system , I don't care . How do beginners judge which serial port we are ？

  The method to determine which serial port is is is to open the device manager interface , Pull out USB A serial port , Plug in , Observe which serial port is newly added .

Know your own USB After which serial port is it , You can use the following command , stay windows Push light applications in command line tools .

amp serialput app com52

Enter after entering the command , Will return some information , The key message is “Please reboot board now”, mean , Please reset haas510 Development board . It is impossible to push without resetting .

  Press the reset key in the red box （ stay 510 In the first edition , This button is not marked ）.

  then amp The tool starts pushing , And display the progress in the form of a simple progress bar .

Suppose we use the one we just downloaded amp The default code . The push speed is very fast .

amp The code provided with the tool is like this ：

console.log('hello amp!');
console.log('amp version is: ' + system.version());
console.log('amp platform is: ' + system.platform());
console.log('amp heapTotal is: ' + system.memory().heapTotal);
console.log('amp heapUsed is: ' + system.memory().heapUsed);

Push complete

 5. Observe the operation effect

amp The tool comes with this js The content of the program is very simple , Just send a few string messages , such as hello amp, There are also system version numbers and other information .

console.log('hello amp!');
console.log('amp version is: ' + system.version());
console.log('amp platform is: ' + system.platform());
console.log('amp heapTotal is: ' + system.memory().heapTotal);
console.log('amp heapUsed is: ' + system.memory().heapUsed);

  What does this information look like ？

yes DEBUG UART, That is to debug the serial port .

How to connect ？

As shown in the figure below ：

The actual wiring is shown in the figure below , Use... From the suite 3Pin Transfer through the transfer line . Then connect one by one 5V DuPont line power supply .

  Reset the development board , Then observe through the serial port assistant . This article USES the sscom Serial port assistant . From a lot of debugging information , We can find this one that only runs once js Program output information .

  Do you find it particularly troublesome to find these buried information . No problem , We can revise it .

 6. Send messages regularly

Let's change the program , adopt VSCODE modify , It can also be done through VSCODE Self contained terminal replace windows Push with the built-in command line tool .

  The source code is as follows , It can be copied with one click .

console.log('hello amp!');
console.log('amp version is: ' + system.version());
console.log('amp platform is: ' + system.platform());
console.log('amp heapTotal is: ' + system.memory().heapTotal);
console.log('amp heapUsed is: ' + system.memory().heapUsed);


setInterval(function () {

  console.log('Hello World, time: ' + new Date());

}, 1000);

The operation effect is shown in the figure below , In this way, we don't have to look for a few lines of debug output in a large section of debug information .

console.log In the debug js Programming is a very important method , In a program with a large number of lines of code , You can add this method at a key location , It is used to observe whether the process data is correct , This can help modify the optimizer .