topic LPC11C CAN Baudrate configuration in LPC Microcontrollers

LPC11C CAN Baudrate configuration

lpcware — Wed, 15 Jun 2016 19:29:53 GMT

Content originally posted in LPCWare by kwinchell on Mon Jun 17 12:21:52 MST 2013

Does anyone know of a document that discusses baudrate configuration for the CAN bus?

I have found some discussion in the users manual, but not enough to know with confidence how to configure the registers.

Given my clock rate, at 48 MHz, and a desired CAN Bit rate of 1 MHz, how do I set up

CANCLKDIV, BRP, SJW TSEG1 TSEG2

Re: LPC11C CAN Baudrate configuration

lpcware — Wed, 15 Jun 2016 19:29:54 GMT

Content originally posted in LPCWare by Wouter on Mon Jul 01 01:44:45 MST 2013

Hi,

The CAN bitrate timings are well described on the internet, e.g.:

http://www.bosch-semiconductors.de/media/pdf_1/canliteratur/cia99paper.pdf

More convenient is to use a CAN bus bit timing calculator, e.g.:

http://www.kvaser.com/en/support/bit-timing-calculator.html

Select SJA1000, enter the requency at which speed you CAN peripheral is running, the desired baudrate and hit "Calculate". BTQ is BRP, SJW is SJW, T1 is TSEG1 and T2 is TSEG2. CANCLKDIV determines at which speed your CAN peripheral is running.

Regards,

Wouter

Re: LPC11C CAN Baudrate configuration

lpcware — Wed, 15 Jun 2016 19:29:54 GMT

Content originally posted in LPCWare by kwinchell on Thu Jul 11 05:18:50 MST 2013

Thank you for the reply.

That is what I was looking for.