CRC

Similar Questions

• Re: Internal error CRC on satellite

  Hello

  I'm trying to restore the operating system on my mother in laws equium. I say yes to erase the entire hard drive and it gives me the plugin screen of your power to say and that is to copy the new files, then I get a crc error internal to the Y then a different location each time (usually in music).

  I tried to use another drive of toshiba and also just an os disc. I tried a disc hard diferent and also another dvd player.

  Can anyone help?

  Thank you

  Clare

  Hello Clare

  Please don't get me wrong, but your ad is quite confusing.
  Each Toshiba laptop comes with the pre-installed operating system and install recovery disc. New laptop models are supplied without disk recovery, but with the recovery image saved on the HARD drive and it can be used for the installation of operating system.

  It will be interesting to know what model of laptop do you have and do you use original Toshiba Recovery for the OS installation disc.

  To be honest I don't know what to do, you mean under another drive of Toshiba or just OS disk.
  It is not understandable that you think average with different hard drive and also an another dvd player.

  The whole story is extremely confused. It will be nice if you can provide more specific information.

• Crc wireless P60 errors

  I can not connect my P60 to the local wireless network at work. I have a good signal (the router on the same desk), but Windows just goes to "detecting network type" and then said that the network is out of range.

  Atheros client utility shows that I'm not 100% crc errors and no packets received ok.

  I tried to remove and reinstall the drivers and also the donwloaded later on the Toshiba site.

  This indicates a hardware failure? I felt so I got the screen repaired and have not tried the wireless since.

  Hello

  You're talking an Atheros utility then I suggest that this software is installed on your operating system.
  AFAIK the Atheros Client utility to configure your wireless connection.
  In this case, the Windows wireless configuration must be disabled.
  Please, go to the wireless options and disable the option use windows to configure my wireless network

  Good bye

• 485 error CRC/KEY (GModbus)

  I get an error CRC/LRC of a system half duplex 485 connected to a Watlow controller.  I have the device set up in MAX for auto 4-wire and I have this code running on other identicle with number systems.  Does anyone have an idea on what would cause such a mistake?

  In most cases, I know that a 485 connection is a connection of 2-wire. You may need to assign MAX auto 2 son.

  Kees

• CRC-16 with 0 x 8005 polynomial

  I use a CRC-16 for a community page VI of NOR who uses 0xA001, which is the inverse of the polynomial, I want to use, 0 x 8005. For example, with a single 0xD6 byte data, the CRC-16 with 0xA001 is 0xDE3E, it should be 0x9E81 using polynomial 0 x 8005. Change just the polynomial does not give the right result. I have an attached image. Is there something I should 'flip', or 'reverse' to be able to use the polynomial I want and get the right answer?

  

  
  

• CRC 32 bit

  Hello

  I am in communication with stm 32 via UART. The framework that I get is "1C000000B0B80700040400000000000000" and the CRC of the frame is "9D0351B5". its does not not in the calculation of the crc which I do, the calculated crc is '226F9471 '. I tried the calculation with python and other sources calculated crc works very well. If someone how to solve, pleas ëlet me know.

  
  

• Odd CRC calculation

  Greetings!

  I built an interface to a sensor of bubble Sonotec.

  There is a detail that I have not been able to solve; calculation of the CRC.

  The manufacturer sent me a pair of examples in based scripting languages, Delphi, and C for the calculation of the CRC. (see attached .txt files)

  I made an attempt to interpret the two examples and code creation LabVIEW (see Calc Sonotec CRC.vi)

  I built a brute force method that increments the CRC 0 - FF, while checking the bytes of return.

  Some commands do not return a response, so no idea as to when my code 'Assumes that the CRC' work on these.

  I thank everyone who is interested to help out me.

  Mike

  
  

• Converting C code for the calculation of the CRC in labVIEW

  Hi guys, I am a bit stuck. I'm trying to implement a piece of code C in LabVIEW and I make an apparent error. You could someone compare code C my VI and tell me what I'm missing? Thanks in advance.

  For combination of Bytes1 and 2 CRC results must be (by decade):

  Octet1 octet2 CRC
  254 0 061
  253 0 002
  252 0 023
  251 0 124
  250 0 105
  249 0 086
  248 0 067
  247 0 128
  246 0 149
  245 0 170

  I did very little improvement + correction (you forget the binary inversion)

  -Benjamin

• Configuration of the loops in LabVIEW to return to the beginning under certain conditions of CRC calculation

  Hey gurus of LabVIEW,.

  Well, I recommend also move your file in writing to be inside the loop, more precisely inside the TRUE (I could bad told you before).  If the CRC was released in 0, do you all the processing, otherwise do nothing.  Then the next iteration.  By moving the file i/o inside the loop, you're avoiding accumulate huge berries (IE a lot of memory).

• Series Packet Question: How to calculate CRC

  Hi all, I have tryied to find an answer on how to calculate the CRC on a RS232 packet received, its really driving me crazy!

  im a beginner, learned how to use labview read on different forums, and I had managed to build really good applications, but im stuck in this, hope someone can help me...

  OK, so im constantly receive packets of 15 bytes:

  A5 09 0C 00 61 05 1F A0 10 00 05 00 04 05 3F

  A5 09 0C 00 61 05 10 00 05 0C 2F 03 A0 1F-3F

  A5 09 0C 00 61 05 10 09 05 09 04 09 A0 1F-3F

  the supplier for material gave me the following code to calculate the CRC:

  Control CRC program:

  #define unsigned char uchar
  UCHAR CRC_Bitwise8 (uchar * buf, uchar size)
  {
  UCHAR i, j, b;
  UCHAR crc = 0;
  for (j = 0; j<>
  {
  b = * buf ++;
  for (i = 0; i<>
  {
  If (((CRC^b) & 0x01)! = 0)
  CRC ^ = 0x18;
  CRC > = 1;
  b >> = 1 ;
  }
  }
  return crc;
  }

  so my question is, how can we insert this code in labview? any example?

  Thanks in advance, this forum has really helped me learn labview in a practical way.

  You can use my code for the thread that I've referenced.  To play with a web version of my code go here. My code is based on the code on this Web site.

  My code to the following parameters:

  Calculation of the CRC: Other (specify)

  Order of the CRC: 8

  Polynomial CRC: 0 x 30

  CRC initial value: 0

  CRC XOR final value: 0

  Reflect the preprocessing of data: TRUE

  Match the data before Final XOR: TRUE

  In your messages, the A5 09 0c is certainly a header.  I think that the 00 following is also part of the header, but without the manual, I can't confirm.  00 will not affect the calculation of the CRC, in order to get the same results with it and without it.  So, in your first example, I use 61 05 3F 1E A0 00 05 00 04 10 and the result is 0x05.

• Calculation of the CRC-16 CCITT

  I need help for generating a CRC - 16 CCITT.  I've searched high and low and can't find the right one.  Here is a list of the sites that I have used to try to find a LabVIEW VI to do the trick:

  http://zone.NI.com/DevZone/CDA/EPD/p/ID/1660

  https://decibel.NI.com/content/docs/doc-1103

  http://forums.NI.com/T5/LabVIEW/CRC-CCITT-16bit-initial-value-of-0xFFFF-or-0x1D0F/TD-p/896664

  http://forums.NI.com/T5/LabVIEW/CRC-16-CCITT-of-serial-packets/TD-p/1471386

  http://forums.NI.com/T5/LabVIEW/trying-to-find-VI-in-LabVIEW-to-calculate-CRC-CCITT-1021-X-25/TD-p/1...

  http://forums.NI.com/T5/LabVIEW/CRC-CCITT/TD-p/109061

  http://forums.NI.com/T5/LabVIEW/computing-CRC/TD-p/825325

  Some of these even have several CRC to the choice.

  Now, what I have is a piece of code C.  And this is where I ask for help because I have no idea how to turn C in G.  And I'm certainly not fair why this CRC is different from 'standard' ones found in the links above.

  I have attached the PDF with the code.

  Here are a few hexadecimal strings and their corresponding CRC:

  String: 00 CRC 08:07 1

  String: 00 09 CRC: 1-06

  Chain: 02 22 03 E8 CRC: E5 6a

  Chain: 02 27 03 E8 CRC: B5 CF

  Chain: 02 29 00 02 CRC: EB 57

  String: 04 29 00 01 00 03 CRC: CC 94

  Chain: 02 00 64 CRC 3D: 05 38

  If there is someone out there willing to give a shot of this I am CERTAINLY happy!

  Paul.

  Ah.  There is a small tweak in there that makes it different from the 'standard' CRC  How sneaky of them.  This code gives me the results you're looking for.

  

• Modbus crc

  Hi all

  My query is about CRC Modbus RTU.

  I know Modbus Library provided by OR calculates the CRC, but I want an event (boolean or int etc.) when the CRC does'nt transmitted and received are so that I can call it a mistake. and not to perform additional operations.

  Am I missing something?

  Kind regards

  Robert

  Also, if you run the library Modbus CRC function on a chain that already contains the CRC bytes, the output of the CRC of the function returns 0 if the CRC is correct and something else if it is wrong.  Then you can just take the string, put it in the function CRC and do a = 0 on the output of the CRC of the function to get your Boolean value true or false.

• 8-bit CRC-CCITT

  Hello

  I'm trying to generate a bit 8 CCITT CRC with the polynomal 9-bit U3 + U2 + U4 + U8 + 1

  I have studied and tried to change the CRC 16 bit found here calculator and Vi post by Shoneill here, but I'm getting nowhere...

  Generator of CRC should be initialized to 0, LSB is sent first.

  In the datasheet, I found the example:

  Data 1:1010 0000

  2 data: 0000 0011

  CRC: 0010 1010

  Any intervention on how I can modify the existing 16-bit calcultors, or would it be a better idea to start from scratch?

  Solved. Change the shoneill vi finally gave me the result I needed.

• Map of CRC-16 TR - M Communication, Modbus RTU

  I'm writing the procedure for generation of CRC - 16 for Communication if card - M from TECO Electric and Machining Company.  Here's the algorithm that they provide to generate the word of CRC - 16 (attached is my attempt to implement, I look forward to suggestions).  Here are verbatim:

  A. load a 16-bit register with FFFFH.  Call it the CRC register.

  B. Exclusive or the first 8-bit byte of the message with the low byte of the CRC 16-bit registers, put the result in the register of the CRC.

  Register to shift of c. CRC one bit to the right (towards the LSB), zero filling the MSB.  Extract and examine the LSB.

  D. If the LSB is 0, repeat the procedure C (another change).  If LSB is 1, exclusive or the CRC register with the value of the polynomial A001H.

  E. Repeat C, D, until the eight shifts were made.  Wile to do this, a full byte will have been treated.

  F. repeat the procedure B-E to the byte following the message so that all the bytes of the message is processed.

  G. when the CHILD is placed in the message, TI upper and lower bytes are to be swapped.

  If anyone understands this, please feel free to tell me where I would not (see attachment).

  See you soon!

  jmcbee,

  I have attached a vi that comes with the Modbus LV library.  You should get the answer.

• Need help with CRC-16-IBM

  Hi all

  I have a servo-motor brand Ezi-Servo, which operate by sending the command series for her.

  The problem I've got is on CRC Checksum. I tried my best to do, but the result was not the same as the sample code they gave me.

  Please check my code and my VI and show me what I'm wrong. I would appreciate.

  Polynomial is x 16 + x 15 + x 2 + 1

  Some examples of good result of the CRC16

  6 A 04 01 00 - CRC16 = 0020

  03 00 00 - CRC16 = 01 D9 B 0

  My VI below, is

  

  Hello

  In regards to our result of offset by comparing the C-program. I already spoke with the support of the product.

  The CRC algorithm is CRC 16 Modbus, even we used.

  Cause we got wrong with the result is that they did is not calculated CRC of the whole package.  they cut part of the outside (example: header, address etc.) and calculate only the data component.

  If I appreciate everyone of you guys for helping me solved the problem.

  Thank you very much.

• 16 bit CRC IBM

  Hello

  I'm new to CRC calculation and currently having difficulties to find the Labview live that I can use for the calculation.  I was able to find and use a calculator online CRC to generate correct values, however I could not find any Labview VI that generates values that correspond to the online calculator. See the link: http://www.lammertbies.nl/comm/info/crc-calculation.html

  I am using CRC-16-IBM. I found a VI that seems applicable, but I don't know how to use it.  All my attempts here to a CRC calculation with the vi has failed. Perhaps, it is not the good vi or I'm doing something wrong.   Please try to see if you can use the VI and generate corresponding values with the on-line calculator of the CRC. See attachment.

  Thank you

  I had to do some research to figure out what was the real polynomial (actually lied here).  But then looking at the code, I came up with this.  Certainly, the lookup table will be faster because many of these calculations are predone.