Comments by SandiegoSSD

SandiegoSSD 17-Jan-13 12:30pm View

It's all in one single thread. After sending the "Go" command to the motor and letting it keep running until told otherwise, a timer starts ticking and every tick event checks whether the motor has turned desired number of revolutions(this is done by sending a query command to the motor encoder unit). So when the motor is manually shut down, the query command ( seriPort1.Write("W" & vbCr)
strRead1 += seriPort1.ReadLine() ) can never finish and freezes the form

SandiegoSSD 16-Jan-13 22:03pm View

yes...run time. part of my brain slipped again

SandiegoSSD 7-Jan-13 17:15pm View

I used int (which it seems like I should for ADCW)
and itoa()

works now.
Receive 128 for 0.65V on the serial port

SandiegoSSD 27-Dec-12 17:38pm View

Thank you for the answer. Stopwatch is working for me. My timescale's pretty big. I just tested with four relays and it takes about 2 seconds to cycle through them with my code. Run it 10 times, each time is around several tens of milliseconds different from each other(I'm interfacing with mechanical arms and relays so it's not digital precise)

SandiegoSSD 27-Dec-12 16:04pm View

well.. a question not very well thought of I guess.
Now that I typed it out I think I should just use another timer

SandiegoSSD 19-Dec-12 14:40pm View

it Works now!
also I intended to say
if (strncmp(Command_String,"ABC",3) == 0)
printstring(Command_String);

I didn't realize 0 indicates the two strings are the same.

SandiegoSSD 19-Dec-12 14:25pm View

Thank you for the tips.
Regarding the strncmp, I thought it would give non zero for identical strings..but now I see that it actually gives 0 for identical ones. Thanks

SandiegoSSD 18-Dec-12 17:57pm View

Enlightening! will try tomorrow

SandiegoSSD 18-Dec-12 15:59pm View

I was trying to use 'C' as a terminating char. I could've use \0 or \n to be more explicit.

SandiegoSSD 17-Dec-12 18:29pm View

Thank you for the heads up

SandiegoSSD 17-Dec-12 18:19pm View

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Thank you for the heads up.

Also I assume if pBuffer is defined as char *,
then " strcat (pBuffer, some_char) " would not append the some_char to pBuffer.
Maybe I could do something like

*pBuffer = RingBuffer_Remove(&Buffer);
pBuffer++;

What do you suggest?

SandiegoSSD 17-Dec-12 16:03pm View

I guess I should narrow down my question to : I have some doubts about what type I should use for that "Command_String", which holds the char data read from Buffer. Also some clarification on whether I should be checking '\n' or '\0' as the string terminator? (while this checking happens on the microcontroller side, on my VB GUI which sends data to the microcontroller, I can send either \n or \0 whichever is necessary)

SandiegoSSD 19-Nov-12 17:13pm View

well,what a learning curve..

SandiegoSSD 19-Nov-12 17:12pm View

yes..I learned PIC in school and that's the impression i have for PORTD1, an individual field of the register you can r/w

SandiegoSSD 19-Nov-12 17:04pm View

yes....it turns out
#define PORTD _SFR_IO8(0x0B)
#define PORTD7 7
#define PORTD6 6
#define PORTD5 5
#define PORTD4 4
#define PORTD3 3
#define PORTD2 2
#define PORTD1 1
#define PORTD0 0

this is in iom324p.h , since I'm using ATmega324p

SandiegoSSD 19-Nov-12 16:02pm View

http://www.pololu.com/docs/0J36/3.b

that's the page I was looking at to get started with the avr studio

SandiegoSSD 19-Nov-12 14:26pm View

"|=" is a set bit mask. PORTD1 |= 1<<1, or just PORTD1 |= 0x01 (00000001b), simply set the first bit high

SandiegoSSD 19-Nov-12 14:18pm View

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I know |= and shift. Just not sure why the PORTD1 would equal to 1 or whatever bit we are trying to set (i.e., if PORTD3 is used here instead, would we know that it equals to 3? 'cause we'd like to set the 3rd bit from right) . May this question is too AVR specific.

SandiegoSSD 23-Aug-12 16:01pm View

Thx for the reply

SandiegoSSD 30-Jul-12 16:06pm View

The project was upgraded from vb6 to .net, and it used to define ML as
ML = New MLApp.MLApp
I guess after switching to ML = CreateObject("Matlab.Application") during the upgrade, things changed.
I do remember during debug that I had to add the MLApp as a reference in the .net project to get rid of some debug errors.

SandiegoSSD 20-Jul-12 21:02pm View

I changed my local time on computer to tomorrow(7/21) yet it still gives 7/20 when I build it, debug it on MY computer, whose local time is tomorrow. And this is before I even publish it.

SandiegoSSD 20-Jul-12 11:57am View

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update: the Getexecutiveassembly() does work. i screwed it up the first time. sorry for the fussing

SandiegoSSD 6-Jul-12 18:39pm View

THX! that does it.

SandiegoSSD 6-Jul-12 17:52pm View

Well, it's going really slow now , not many people around at this moment... Happy Friday afternoon guys~ and also 4th July weekend i guess

SandiegoSSD 6-Jul-12 14:43pm View

i just looked that word up in Urbandict. wow

SandiegoSSD 27-Jun-12 18:00pm View

I really need something simple . I kinda remember from Win Xp this thing called Hyper terminal. i 'll check that out

SandiegoSSD 26-Jun-12 18:03pm View

yes.. when inputmode set to be binary then it's bytes. and when set to text then it's string

SandiegoSSD 26-Jun-12 14:55pm View

not sure..i think it should be Bytes

SandiegoSSD 20-Jun-12 13:17pm View

thank you. I was screwing around and ended up using the same way you suggested.

SandiegoSSD 20-Jun-12 13:16pm View

Thanks.5

SandiegoSSD 10-May-12 17:31pm View

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Thank you guys for the post. i'm using List(of String) now. One concern: I do want to check thru this list of string and only add to it new strings that I read from table, not strings that's already in the list . I'm thinking of something like
Dim RefDesgStr As New List(Of String)
For Each row As DataRow In SubTables(index).Rows
temporaryStr = row.Item("RefDesg")
for each tempStr As String in RefDesgStr
if tempStr <> temporaryStr Then
RefDesgStr.Add(temporaryStr)
end if
next tempStr
next row

but sth's fishy about it

SandiegoSSD 10-May-12 15:42pm View

Thank you guys for the detailed explanation..and go easy with the rookies

SandiegoSSD 9-May-12 14:42pm View

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Thank you VJ Reddy for the solution. This does want I intended. There's one exception though. For my application some of the PartNum starts with 0, i.e., "0239904". Both DataView and LINQ get rid of the 0 when they put the data in the subtables. But I'd need to keep the 0 there as it is.. I was using some datagrid as below to visualize the subtables: DataGridView1.DataSource = subTables(0) DataGridView2.DataSource = subTables(1) DataGridView3.DataSource = SubTables(2) Any ideas to get around the 0 problem?

SandiegoSSD 9-May-12 14:35pm View

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Thank you VJ Reddy for the solution. This does want I intended. There's one exception though. For my application some of the PartNum starts with 0, i.e., "0239904". Both DataView and LINQ get rid of the 0 when they put the data in the subtables. But I'd need to keep the 0 there as it is..
I was using some datagrid as below to visualize the subtables:
DataGridView1.DataSource = subTables(0)
DataGridView2.DataSource = subTables(1)
DataGridView3.DataSource = SubTables(2)
Any ideas to get around the 0 problem?

SandiegoSSD 16-Mar-12 14:43pm View

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Do you think the BackgroundWorker will work here in this case?

SandiegoSSD 16-Mar-12 14:42pm View

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Do you think the BackgroundWorker will work here in this case??

Comments by SandiegoSSD (Top 36 by date)