Closed. This question needs to be more focused. It is not currently accepting answers.
Want to improve this question? Update the question so it focuses on one problem only by editing this post.
Closed 6 years ago.
Improve this question
I'm new with zigbee i need you to help me learn about it and know how to implement an embedded system using it
thanks in advance
One good place to look is on the Digi site. They have several products to help you, including embedded development kits.
If you want to go Open Source, look at Source Forge. They have some open source stacks. I have not used any of them, so I cannot comment beyond knowing that they exist.
Depending on your needs, you might want to just look at XBee, which is a subset of zigbee. There are some nice development tools for XBee. I have used an XBee expansion shield with the .net micro framework and boards provided by TinyCLR to do a wireless prototype.
Creating a zigbee stack on your own would be a fairly large task, so only you can determine if there is ROI in doing so. I would be more inclined to buy it in.
Get a ZigBee Starter Kit. Lots of vendors provide one; gust Google that exact phrase.
For example: AVR 8-Bit RISC - IEEE 802.15.4/ZigBee - Tools
Or you can ZigBee on a PIC/Microchip at very low cost. http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=2112
Related
Closed. This question is opinion-based. It is not currently accepting answers.
Want to improve this question? Update the question so it can be answered with facts and citations by editing this post.
Closed last year.
Improve this question
I know it's not a coding question , but I am struggling with something around my head for a little bit, for example stm32f446re : why it doesn't have only one datasheet , why so many datasheet for only one microcontroller , also my question is : how could I get all different possible datasheets for a specific microcontroller like stm32f446r4 Nucleo because I searched a lot but my instructor told me that there is about 6 different datasheets for stm32f446re , but what I could find is only 2 datasheets ?
Traditionally, documentation for microcontrollers goes like this:
Data sheet = information for the hardware designers.
Reference/User's Manual = information for the software designers.
A separate core manual regarding the CPU Instruction Set Architecture (ISA) and assembler language, also for software designers.
Application notes = additional information about either hw or sw.
Errata. List of known hardware bugs. Always skim through it!
Please note that "Nucleo" etc isn't a microcontroller but a specific evaluation board. It will have additional information about that specific board.
Closed. This question needs to be more focused. It is not currently accepting answers.
Want to improve this question? Update the question so it focuses on one problem only by editing this post.
Closed 2 years ago.
Improve this question
I'm having a hard time understanding the big picture of GemStone for Smalltalk. I am aware of GLASS as an application server using Linux, Seaside and Apache. But I want to know if it is an usable environment for non-Seaside applications.
I'm also having trouble to finding some basic questions:
It is not clear to me if GLASS or GemStone/S is independent of the VM used. For example if I'm using a VM which supports black threads, does that mean that the GemStone/S will work transparently?
For what I've seen also it is not useful for 3D applications. For example, if my application developed in Pharo or VisualWorks uses OpenGL, may I consider GemStone/S for scaling up?
I've read that you may have objects in VisualWorks and objects in GemStone/S, but this confuses me a lot. How do I know if the object I've just created it is already persisted or in "client" side? In which case I need GemBuilder?
To get an understanding of the big picture of Gemstone/S, you can read Gemstone 101.
Many of your questions should be answered and some of them are also not applicable. For example, Gemstone/S is a complete Smalltalk implementation with its own VM. It also does not have a visual interface like Pharo, Squeak or Visualworks.
Suggestion: You need to split the question into several ones.
For example:
Is GLASS or GemStone/S independent of the VM used?
No, as far as I understand the question. GemStone needs its own VM. You cannot run GemStone on a VM of another Smalltalk.
Closed. This question is off-topic. It is not currently accepting answers.
Want to improve this question? Update the question so it's on-topic for Stack Overflow.
Closed 11 years ago.
Improve this question
I've been trying to describe the concept of platforms to some non-developer people on my team. I'm trying to explain how platforms are more than just tools and environments. For example, the Facebook Platform. How to describe the fact that the platform is more than just the website, but includes protocols like XFBML, opengraph, etc.
Facebook Platform is one example, but I would be interested if anyone has an abstracted way to describe what 'platforms' are in the tech world. I've had difficulty explaining this concept before in situations unrelated to flash.
Analogies that aren't tech related would be helpful as well.
I would say something about it being all-inclusive and extending to include all functionality that the entire ecosystem around that particular piece of software needs to thrive.
The Wikipedia page might help in putting it into words: http://en.wikipedia.org/wiki/Computer_platform
I use a "restaurant" metaphor, myself: Think of the kitchen, the bar, the dining room as components to the platform. How the decor can change in the dining room without changing the function, but can affect how customers perceive the business. How the recipes instruct the cooks, and the interactions with the wait staff can all affect different aspects of the business much like different pieces of your platform can be modified to affect different aspects of your business. Oh, and don't forget management!
Closed. This question needs details or clarity. It is not currently accepting answers.
Want to improve this question? Add details and clarify the problem by editing this post.
Closed 4 years ago.
Improve this question
How to know that, the system you are building is a better as Desktop Application than an Web Application?
My top 3:
I need to use/control the hardware directly (printer, graphic card...).
I don't care if my project is platform dependant.
Need complex user interface (OK Web 2.0 is better than ever, but it's still hell to make advanced specialized stuff to work in all Web browsers).
Interesting question. in practice the answer hinges primarily on the deployment requirements:
If you want very broad and "instant" deployment - then use HTML and HTTP.
if you or your organization have administrative control over the computers on which the app will be deployed, making it a "desktop app" is acceptable.
Most apps lie between those extremes.
It depends on your target audience, desired features, and what delivery method makes the most sense.
It might help to answer these questions:
1) Who will use this?
2) What will they do with it? (think about thinks like media operations, data storage,..)
3) How will they best be able to get this app?
4) What operating system(s) will it support?
Closed. This question is off-topic. It is not currently accepting answers.
Want to improve this question? Update the question so it's on-topic for Stack Overflow.
Closed 12 years ago.
Improve this question
How do you connect these to your computer? Which one would be easier to burn?
The information you seek can be found by comparing the data sheets: AT89C51, AT89S51, however you will see in this first link that it states:
Not recommended for new designs. Use AT89S51.
So that probably makes your last question irrelevant, you should use the AT89S51 regardless.
With regard to your second question (which I interpret as "connecting to a development host"), I suggest that you use an off-the-shelf development board unless you have the means and skill to produce your own. In-system programming can be achieved through the UART (there's an app. note in the link above), so you'll need a PC with an RS-232 serial interface and a NULL-Modem cable (the latter may come with the board). If you do not have a serial port on your PC, get a USB serial port adapter.
Obviously you need the development tools; at leas a compiler, and for debugging you'd benefit from an emulator; again the link above has references to tools.
Overall; read the manufacturer's documentation is the answer to all your questions! ;-)