Series read reads the available characters
I am trying to contact a Magellan/Ion controller, using RS 485. I'm running an external monitor with shows me 7 bytes sent by the controller for labview, I use the writing basis of VISA then wait a few milliseconds and then VISA read so that the use of the property of bytes to the port say the VISA read the number of bytes to read. When I watch OR spy, I see that read VISA function is told to read 7 bytes of the right address COM, but only six bytes are read. I changed the delay before the time of reading from 0 to so long that it is not read anything and I still have the problem. By a number of bytes that reading VISA has internally that I'm running into timeout or maximum or is there some other solution to my problem?
It is not at all strange. It is planned. If you do not read ASCII, clear the nature of the expression. VISA read ends as soon as the character is detected.
Tags: NI Hardware
on blackberry 9000, I tried to read some special characters like this: ° ²® µ±³ ° ¯´µ±´¯® text file
using this function:
FileConnection fc = (FileConnection) Connector.open ("file:///SDCard/test.txt", Connector.READ_WRITE);
InputStream is = fc.openInputStream ();
InputStreamReader reader = new InputStreamReader (is, "UTF - 8");
LineReader lineReader = new LineReader (is);
line & = new String (lineReader.readLine ());
what I get is different, I can't write it here, it is difficult to find these characters.
I change the content of the file to:
aaaaabbbc ° ² ° ¯´µ±´¯® µ±³®
now I get:
aaaaabbbc, then the same characters
How to display the same as what I have in the text file?
To add to what martijnbrinkers said, you need not to the InputStreamReader because you don't use it (and this is why your code has no idea that the file is in UTF-8 encoding).
I'm new to labview and work on a project that accepts the biotic data. I have read the information and analysis data correctly but when I try to set up the number the polarity and decimal pt do not seem to be correct. When the polarity is negative, a 1, the number that came out is positive. I have posted before and was invited to use the concatenation and the power of 10 and I wonder if it's okay. Should I be looking for the 1 (negative bit) and negate the number at the end before the release?
I have another question: how to accept a number between the touch screen and just write this number in an output file? I searched in the help and online but found no example.
Any help would be appreciated.
I have included my vi.
I'm sorry, I apologize. I thought since it was a new problem to a new position. I've corrected the problems mentioned in this post me. Oh and when I created the project/vi I created it as a touch panel.
I send you data back and fourth between a microcontroller and labview using rs232, but I am having trouble with some numbers, it works very well in teraterm but not my labview vi.
If I send 'h1234E' (E is the tank of the end) the microphone sends back "1234" as a test to prove that it is the extraction of the number off the chain... but in my labview vi I send 'h1234E' and only return "h1".
The function 'read' is available for the iPhone 6 too? the iPhone 6 has the option that he read the information highlighted, but I don't know how to put in place on the new phone.
Looks like you describe talk about selection. To activate that go to settings > general > accessibility > speech. -AJ
I use VISA 5.3 for reading my serial device... my standard equipment is WELL this device will send four messages for only one comand I need all four messages to display at the same time in VISA SERIES READ BUFFER
I use VISA 5.3 for reading my serial device... my standard equipment is WELL this device will send four messages of single command given to this instrument... and I read messages through VISA series READ... during the race, the VI buffer displays the messages individually... I need all four messages to display at the same time in VISA SERIES READ BUFFER, in order to find more than this block, I should add from the palette of function.
Disable character of endpoint detection or make four readings where you concantanate simply the strings together.
I need to communicate with a serial device that sends messages back, but also sends a break, break, break, break series combo that I need to listen to. I've never worked with before series breaks but the only VI I found which seems to detect pending VISA on event VI with the series Break parameter. I'm not sure that understand how I could detect a break in the series, but also to be reading and writing messages at the same time in the meantime. Isn't this possible?
If you use multiple loops, I think you can do. You use 1 loop to check to see if there is data and 1 loop looking for breaks series. Then use queues, authors of notifications or events to anyone who needs to know what you have experienced.
I currently have a PIC18F microcontroller serial communication with LABview using the base read and write.vi series. The PEAK sends strings such as "V222! (V is the character of the header, and! being the end character). Then, I have a program to take each individual character read and concatenate them in a larger string for data extraction. The port has been configured to 38400 baud and be only a single byte of long.
The captain sends this one byte at the time and the problem here is that LABview seems to be only reading V most of the time, and occasinally has 2. Since it doesn't seem to be never read the end character, the sequence of extracting data from my code is never executed.
A few questions I have are:
The captain may send one byte at a time, but also all other devices communicate through a serial port. The definition of the serial port involves both a byte. Actually it's really a LITTLE at a time. But serial port parameters leads to the gathering of 7 or 8 bits to produce a byte. The PEAK sends a follow-up byte to another byte, etc. The time between shipments of the byte may be too small to read contiguously in your Labview program.
At very slow speeds, it could really work. At 300 baud (3mS / bit), there are 33 mS to send a byte (8-bit + stop bit, start bit). So if your loop runs fast enough, you get every byte one at a time. But there is the overhead of other code to store the bytes, etc..
38000 baud to only 0.2 mS to send a byte. LabVIEW is not fast enough to loop at this rate to capture all the bytes individually.
But why bother? Simply capture all the bytes and treat them as a complete message.
You can guide me please with the steps for reading of the analog inputs of a series a. card I use as the target fpga PXI-7851R.
Have you looked at the examples provided with LabVIEW? There are examples showing how to read the analog inputs.
my kids are always downloading music and other things on the internet and some without reason, I lost my sound that I get an error that there is no audio device found... or being used? This was the last message according to test of microspft race driver and then tried to play something of my documents... Unable to read the audio stream: no audio hardware is available, or the hardware is not responding. Can you help? Bill(1) try reinstalling the audio drivers from the drivers disk that shouldcame with your PC.(2) try to do a restore to the point where the problem wasn't there:Start > programs > Accessories > system tools > system restore(3) download and install the latest driver from the manufacturer's website.
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I have a laptop my father gave to me and I need to restore it before using it for me because it works very slowly.
I have the restore cd but I have problems with the cd player.
It does not read some CDs, but it will not read the cd recovery so its as if it is not there.
Is it possible to restore it without the cd? I'm not very super-friendly up with computers, so please simplify if possible.
Any help would be appreciated.
You can try to boot from the original CD of Microsoft Windows.
Check if this CD is readable.
Then you can download the drivers from Toshiba from the European driver Toshiba page and could install the drivers
A few words about the CD drive problem, it seems that the goal of readers can calibrate in the right position and therefore some CD or DVD is not readable
In most cases, the CD/DVD drive should be replaced to solve these problems
See you soon
I tried to burn a CD on my Toshiba with a DVD burner "Tsst corp cddvdw ts-l633f.
But it will not read the disk... I tried with the CD - R from Verbatim.
Is there anyone who have the same problem, or maybe know a producer of CD empty that can be read by my machine?
What model of laptop do you have?
What burning software do you use?
Have you noticed these issues in the past?
Of way General Verbatim offers high quality of all blank media and I also use it.
I'm reading two columns of data from the serial port.
I use the serial of Visa service and I can read the first column of data from the serial port, but I can't understand how to read the second column.
I want to both sets of chart data.
I enclose my VI.
Thank you for your help.
The analysis of string function takes a "Format string" on top (with the right button of the function and choose Help, which explains all the entries). In particular, you can say 'Give me two numbers separated by a tab' and the output will be two numbers (whole or floating, depending on the chosen format). In particular, %d\t%d specifies a decimal integer,
, whole decimal.
I'm reading a string of 80 bytes from the serial port, but if one of these bytes is 0d (hexa) the rest of the bytes are not read because the read node Visa sees the value 0D as ASCII for the return shipping. How can I read the entire string and see the 0d as a value and not as a symbol of the ASCII?
Of course, she sees it as a carriage return and ends. That's what you have programmed to do. The "character of endpoint allows" set to false with your VISA to set up the Serial Port. What Steve has already said. Claire?
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