Hello Happy new year Thanks for reply sir .. We dont have CAN analyzer tool . Is there any method to simulate the Bus -Off condition by hardware means or by...
giridharilager
giridharilager@...
Jan 2, 2008 5:43 am
6373
Hi Thanks, wish u a very happy new year. For active error frame ok. but for passive error frame before end of frame also there are recessive bits. suppose a...
N.Swathi
n.swathi@...
Jan 2, 2008 1:36 pm
6374
Hello - you need at least 2 CAN nodes in order for a CAN network to properly function. Each one must provide the ACK bit when the other one sends a valid...
Robert Boys
RBoys@...
Jan 4, 2008 7:46 am
6375
Hi All, I am new to the group and to CAN. Hopefully these questions won't seem too stupid to you. I am trying to get hold of some information regarding basic ...
Mike
mbrooks@...
Jan 4, 2008 2:11 pm
6376
Hi Mike, you may look at http://www.vscp.org and see how we have solved things. You can also find some ready to use code for the 258 Cheers /Ake ... -- ... Ake...
Ake Hedman
akhe@...
Jan 4, 2008 4:01 pm
6377
Hi, Thanks for the reply. But this is one of the websites that I have already looked on and was unable to find anything on BOSCH CANa & b basics. It seems to...
Mike
mbrooks@...
Jan 4, 2008 8:39 pm
6378
Each receiving mailbox has a receive filter (usually the "ID" Register of that mailbox). The mailbox will only receive msgs whose IDs match that filter. ...
Corey, Richard
Richard.Corey@...
Jan 5, 2008 12:53 am
6379
... The CAN spec does not say anything about that but have other interesting info Its here ...
Ake Hedman
akhe@...
Jan 5, 2008 12:13 pm
6380
Hi Ake, I already have a copy of the Bosch spec, but as you say it doesn't actually give the specifics about filtering. I know that priority is given the...
Mike
mbrooks@...
Jan 5, 2008 4:52 pm
6381
Thanks for the reply Richard. I think I now understand the filtering. So multiple filters mean that different messages with different ID's and different data...
Mike
mbrooks@...
Jan 5, 2008 4:53 pm
6382
Yes lower id is higher priority. Therefore the MSB bits is often used for priority. See ...
Ake Hedman
akhe@...
Jan 5, 2008 5:41 pm
6383
Hi Mike, I realize you are probably just demonstrating the concept of priority but your example below demonstrates why a lot of people get confused or even...
John Dammeyer
johnd@...
Jan 5, 2008 9:14 pm
6384
Hi Mike, Remember that CAN messages fundamentally are not "meant" for any specific device. There is no addressing. If your node doesn't need to receive...
Geoff Field
geoff_field2003@...
Jan 5, 2008 9:19 pm
6385
Thanks for the link Ake. The table there explained a lot and I now think I'm more at ease with filters and ID's. Mike. -- Archives and useful links:...
Mike
mbrooks@...
Jan 6, 2008 1:20 am
6386
Hi John, Thanks for your detailed reply. There's a lot for me to take in there, but I do think that I understand what your getting at. I have been thinking...
Mike
mbrooks@...
Jan 6, 2008 1:20 am
6387
Hi Geoff, Thanks for the reply. I know that CAN is not address based and that it is multi-boardcast and that every node looks at every message on the bus, but,...
Mike
mbrooks@...
Jan 6, 2008 1:24 am
6388
Hi Mike, Yes. In fact, if the module has 16 inputs and 16 outputs it could use 4 of the data bytes to represent the modules I/O status. If the module has 64...
John Dammeyer
johnd@...
Jan 6, 2008 2:16 am
6389
Hi Mike, I might add that a good book to get you started on CAN and CANOpen is a book written by Olaf Pfeiffer, Andrew Ayre and Christian Kyedel called ...
John Dammeyer
johnd@...
Jan 6, 2008 3:30 am
6390
In most architectures, the number of mask registers is fairly limited, so it makes sense to configure at least some of the mailboxes to take a range of ID's....
Geoff Field
geoff_field2003@...
Jan 6, 2008 9:36 pm
6391
Dear sir Thanks for the reply I got most of the things you explained but still i have some problems Yes i am using Keil uvision 3 evaluation version with LPC...
giridhar ilager
giridharilager@...
Jan 7, 2008 8:03 am
6392
Hi Mike, maybe you have sorted out the filters already. But I will try to give some small tips that helped me. Because of the multi-broadcast nature of the CAN...
Bertil Bäck
bertil@...
Jan 7, 2008 8:43 am
6393
Hello Everyone , I am developing a CAN microcluster .Now i have finished the interface of CAN SJA1000 with 8051 and now i have to test it. So i need to know...
joe jeff
joshuaamitha7@...
Jan 7, 2008 9:11 am
6394
Dear sir Thanks for the reply I got most of the things you explained but still i have some problems Yes i am using Keil uvision 3 evaluation version with LPC ...
John Dammeyer
johnd@...
Jan 7, 2008 11:38 am
6395
Hello together, in our project we work with CAN, especially with CANopen. I have a question to the special situation. There are two nodes on the bus with the...
Daniel Geiger
d.geiger@...
Jan 7, 2008 1:39 pm
6396
Hello Daniel, once the CANopen part of such nodes has started it's too late to detect this, since they will just use the same identifiers, which with a high...
Klüser, Jürgen
Juergen.Klueser@...
Jan 7, 2008 4:46 pm
6397
Hi, I am monitoring a CAN frame at 250kbit/s in the osciloscope. At this bit rate, each bit has 4us, the extended frame contains 128 bits. Thus, the whole...
Marcelo Rodrigues
msrmail@...
Jan 7, 2008 9:36 pm
6398
Probably. If the data field is all "1" or "0" this could easily add 11 extra bits. Cyrilla ... -- Archives and useful links:...
cyrilla@...
Jan 7, 2008 10:53 pm
6399
Hi Cyrilla, you are right, the data field is all "0" in this case. Since the Control Field, Arbitration Field, Data Field and CRC Sequence are coded by the...
Marcelo Rodrigues
msrmail@...
Jan 8, 2008 3:48 am
6400
Hi Daniel ... I never found a good answer. Here are some undesirable approaches. 1. Let a central node poll each expected address repeatedly, commanding one...
Corey, Richard
Richard.Corey@...
Jan 8, 2008 3:51 am
6401
Hi Mike ... and different data can be sent to the same device. That would be the idea, if there were no "don't care" masks. However, the masks enable one...