Lpc2000

Hi

Can someone please explain how to calculate the bit timings for the 
CANbus? eg. how to calc the value that should be written in the 
register CANBTR. 

Im having the core run at 90Mhz (im using an ext osc @ 12 MHz) and 
VPB-clock is also 60 Mhz.
I want to have a CANbus that operates at 125Kbps/250Kbps and 500 Kbps

Can someone pls help me with this

B.R
 /Fredrik Martinsson, V-Teknik, Sweden

Hi Fredrik.

Check the following Web

http://www.esacademy.com/services/
/Berrabongo


--- In lpc2000@yahoogroups.com, "albin_martinsson" <fredrik_m@t...> 
wrote:
> 
> Hi
> 
> Can someone please explain how to calculate the bit timings for 
the 
> CANbus? eg. how to calc the value that should be written in the 
> register CANBTR. 
> 
> Im having the core run at 90Mhz (im using an ext osc @ 12 MHz) and 
> VPB-clock is also 60 Mhz.
> I want to have a CANbus that operates at 125Kbps/250Kbps and 500 
Kbps

> 
> Can someone pls help me with this
> 
> B.R
>  /Fredrik Martinsson, V-Teknik, Sweden

Hi,

see  http://www.port.de/engl/canprod/content/sv_req_form.html
as an online-Bittiming Calculator.

For a detailed explanation of Bittiming see the can_timing.pdf in the 
files section. 

Please don't use the CAN-Examples in the Files Section, the Bittiming 
there seems to be wrong.  



B.G.

Peter
 

wrote:
> 
> Hi
> 
> Can someone please explain how to calculate the bit timings for the 
> CANbus? eg. how to calc the value that should be written in the 
> register CANBTR. 
> 
> Im having the core run at 90Mhz (im using an ext osc @ 12 MHz) and 
> VPB-clock is also 60 Mhz.
> I want to have a CANbus that operates at 125Kbps/250Kbps and 500 
Kbps

> 
> Can someone pls help me with this
> 
> B.R
>  /Fredrik Martinsson, V-Teknik, Sweden