Re: Tele-operated robotic arm need help in programming - C# Discussion Boards

Re: Tele-operated robotic arm need help in programming

5-Jul-07 11:06

well i do see it i understood the code one thing is confusing me that wht did u meant exactly by printable values by seeing this i was thinking somthing different before can u elobrate please i will be really thankful..

Luc Pattyn5-Jul-07 11:29

Re: Tele-operated robotic arm need help in programming

5-Jul-07 11:29

When setting up a communication (or a storage) you have to make a basic decision
as to how represent the commands or data.
1. one way is using text (say ASCII characters); the advantage is you can read
it easily, you can save it to a file, then edit it; you can use an RS232C spy
to watch the characters on the cable, you can use a terminal emulator, etc.
The disadvantages are you need more bytes (since not all bit combinations
are allowed, e.g. ASCII printable is only 0x30-0x7E), and you must encode
(translate number to chars) and decode (translate chars to number).
2. the other way is using bytes simply as binary bit patterns, as you have
choosen to do. In this case, you must provide your own command encoder/decoder,
so a general-purpose tool such as a terminal emulator cannot help you in the
debug stage.

As far as SerialPort class goes,
For 1. you typically would use the methods Write(string), ReadChar, ReadLine;
for 2. you would use Write(byte[]), ReadByte, Read.

Smile | :)

Luc Pattyn

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koool_faysie7-Jul-07 5:53

Re: Tele-operated robotic arm need help in programming

7-Jul-07 5:53

thank u for all the info Luc...i just wanted to add tht is these are the only steps that i hvae to follow...or any other instructions also ..thanks regards

Luc Pattyn7-Jul-07 6:05

Re: Tele-operated robotic arm need help in programming

7-Jul-07 6:05

You're welcome.

I can not possibly predict everything you might need in your further development,
that is part of the planning (guessing?) stage. You are in the best position
to know the requirements, the context and the status...

Smile | :)

Luc Pattyn

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koool_faysie7-Jul-07 6:09

Re: Tele-operated robotic arm need help in programming

7-Jul-07 6:09

i think i mail tht java code also ..exactly tht will be in C# but u meant ..tht the code for controlling the servos will be in tht also right..when we open port then we pass on the intructions ..for the movement right..something like tht..or not..
regards

Luc Pattyn7-Jul-07 6:21

Re: Tele-operated robotic arm need help in programming

7-Jul-07 6:21

Luc Pattyn

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koool_faysie7-Jul-07 6:34

Re: Tele-operated robotic arm need help in programming

7-Jul-07 6:34

in short how we move servos from software applications Cry | :((

like do we have to map the valus for 0-255 or 0-128 depending on the baud rate how ? please explain Cry | :((

Luc Pattyn7-Jul-07 6:57

Re: Tele-operated robotic arm need help in programming

7-Jul-07 6:57

If your target contains one (or more) servos, you should provide a command to
select the servo and give it a new position.
As explained before you either use textual commands (easier to use and debug,
slightly more difficult to receive and decode) or binary commands.
That's up to you.

The baud rate is not really relevant, except for one thing: you need sufficient
bandwidth to pass all the information in time (you can not send 100 bytes per
second over a serial line that operates at 110 Baud !) If you need to download
(PC-to-target) a lot of data (say a speed ramp-up/ramp-down table) or maybe the
target's code itself, then you might want to use a relatively high baud rate...

Please keep in mind that receiving serial data on PC-side is somewhat tricky
(independent of baud rate): a PC is very busy with a lot of processes and threads,
so it is not always ready to capture incoming data. Therefore I recommend you
limit the target-to-PC communication to a few messages per second, and avoid
them to be time-critical.

This also means that low-level algorithms (such as move until micro switch
gets closed) are best handled by the target in autonomous mode, without
involving the PC (so PC says "move till switch closes", target does whatever
it takes to do that, then target reports "OK, did it, switch now closed".

Hope this helps, and fits the plans you have.

Smile | :)

Luc Pattyn

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koool_faysie7-Jul-07 7:12

Setting things like TCP/IP Address and Gateway through code.

7-Jul-07 7:12

yes thnx alot i will ..follow basic ..as much firstly if its done if i find any problems i will reply u in one day or 2 thnx ..

jbradshaw5-Jul-07 8:13

jbradshaw

5-Jul-07 8:13

I need to write functions that will allow the user to change network settings ( we are doing this as part of an Embedded XP project and need to provide our own interface. )

Can anybody direct me to where I can find documentation on how to do this?

I realize I'll have to write the code myself and probably end up calling Windows APIs but I can't find anything helpful out there.

TIA - Jeff.

Re: Setting things like TCP/IP Address and Gateway through code.

Bert delaVega5-Jul-07 10:40

Bert delaVega

5-Jul-07 10:40

Not sure if this is what you're looking for but it might lead you in the right direction.

http://www.codeproject.com/csharp/OazSwitchNetConfig.asp

Re: Setting things like TCP/IP Address and Gateway through code.

jbradshaw6-Jul-07 4:30

jbradshaw

6-Jul-07 4:30

Thanks for your help. That worked great. Now on to my next problems:

Getting/setting the proxy settings
Setting the account a machine will log in as.

TIA - Jeff.

Title of FolderBrowserDialog [modified]

topksharma19825-Jul-07 7:49

topksharma1982

5-Jul-07 7:49

Hi,
can anyone help me , how can i change title of the folderBrowserDialog in c# .
thanx.

-- modified at 13:57 Thursday 5th July, 2007

Praveen Sharma

Re: Title of FolderBrowserDialog

led mike5-Jul-07 8:08

led mike

5-Jul-07 8:08

you're kidding right?

Re: Title of FolderBrowserDialog

Luc Pattyn5-Jul-07 8:44

Re: Title of FolderBrowserDialog

5-Jul-07 8:44

I guess you will have to try and use P/Invoke to call the Win32 function
SetWindowText() in user32.dll

Smile | :)

Luc Pattyn

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Nouman Bhatti5-Jul-07 20:14

Nouman Bhatti

5-Jul-07 20:14

Use SetWindowText

The SetWindowText function changes the text of the specified window’s title bar (if it has one). If the specified window is a control, the text of the control is changed.

but to use this function u have to use some other functions too
i suggest u to download and install "API-Guide" and look windows functions in it

Default Dialog Directories

PhilDanger5-Jul-07 6:36

PhilDanger

5-Jul-07 6:36

Hey everyone,

This may be a very simple (hopefully it is) question and answer, but I'm having trouble figuring this one out.

I want a SaveFileDialog and an OpenFileDialog to start in a chosen directory. Seems simple enough, I'll just create the directory in case it doesn't exist, and then set the InitialDirectory property of the dialog -- but for some reason it's still opening in the last directory that I had browsed to in a previous dialog.

Here's the code:

private const string ATF_FILTER = "AOI Template Files (*.atf)|*.atf";

private const string C_SAVE_DIRECTORY = @"./Saved Templates";

//Save Template
private void Save_Click(object sender, EventArgs e)
{
    Directory.CreateDirectory(C_SAVE_DIRECTORY);
    SaveFileDialog diag = new SaveFileDialog();
    diag.InitialDirectory = C_SAVE_DIRECTORY;
    diag.DefaultExt = ".atf";
    diag.Filter = ATF_FILTER;
    if (diag.ShowDialog() == DialogResult.OK)
    {
        DrawBox.SaveTemplate(diag.FileName);
    }
}

Any idea what could be going wrong?

Thanks,

Phil

led mike5-Jul-07 6:42

led mike

5-Jul-07 6:42

PhilDanger wrote:
Any idea what could be going wrong?

Relative path perhaps? As someone pointed out in the last few days, best practice is to use absolute paths.

PhilDanger5-Jul-07 6:58

PhilDanger

5-Jul-07 6:58

Turns out it works correctly when I switch it from a forward slash to a backslash:

private const string C_SAVE_DIRECTORY = @".\Saved Templates"; //works!

Could you elaborate a bit on the benefits of using an absolute path over a relative path? My intuition and previous web experience tells me that using an absolute path would not be the best solution, but perhaps times have changed.

Thanks,

Phil

led mike5-Jul-07 7:23

led mike

5-Jul-07 7:23

PhilDanger wrote:
benefits of using an absolute path over a relative path?

Well they are "absolute". Relative is subject to the Current Directory so it's only as good as a guarantee that it hasn't changed or is not something other than what you expect it to be.

Luc Pattyn5-Jul-07 6:45