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Re: [avr-gcc-list] Anyone interface an AVR with a CAN bus?
From: |
Alan Kilian |
Subject: |
Re: [avr-gcc-list] Anyone interface an AVR with a CAN bus? |
Date: |
Sun, 25 Jul 2004 19:01:48 -0500 (CDT) |
> I need to control a CAN bus from an AVR, probably using the PCA82C251
> can trransiever. Does anyone have any experience with this IC or with
> interfacing CANs? At this point I just need to know if it'll suffice
> to attache the TX and RX pins to any of the PORTx pins on an atmega, or
> if I should attach them to some proprietary pins like the ouput/input
> counter pins?
Reza,
It depends on how fast your CAN bus is operating and which exact
AVR processor you want to use.
Some CAN busses run at 1 megabit-per-second, and trying to sample
I/O pins to read and write the bus will be difficult I think.
If you choose to wait for the AT90CAN128, then you can just
wire the AVR to the interface chip and be done. Although getting
a 64-pin QFP package on a PCB will also eb a challenge.
I'm not planning on trying to bit-bang CAN anytime soon, so I
think I'll look at a CAN controller like the SJA1000 and
then I can use any old AVR to talk to it.
What are you planning on using CAN for?
-Alan
--
- Alan Kilian <alank(at)timelogic.com>
Director of Bioinformatics, TimeLogic Corporation 763-449-7622
- [avr-gcc-list] Anyone interface an AVR with a CAN bus?, Reza Naima, 2004/07/23
- Re: [avr-gcc-list] Anyone interface an AVR with a CAN bus?,
Alan Kilian <=
- Re: [avr-gcc-list] Anyone interface an AVR with a CAN bus?, Reza Naima, 2004/07/26
- Re: [avr-gcc-list] Anyone interface an AVR with a CAN bus?, Bruce D. Lightner, 2004/07/26
- Re: [avr-gcc-list] Anyone interface an AVR with a CAN bus?, Reza Naima, 2004/07/26
- Re: [avr-gcc-list] Anyone interface an AVR with a CAN bus?, Bruce D. Lightner, 2004/07/26
- Re: [avr-gcc-list] Anyone interface an AVR with a CAN bus?, Richard Urwin, 2004/07/26
- Re: [avr-gcc-list] Anyone interface an AVR with a CAN bus?, Bruce D. Lightner, 2004/07/26
- Re: [avr-gcc-list] Anyone interface an AVR with a CAN bus?, Alan Kilian, 2004/07/26
- Re: [avr-gcc-list] Anyone interface an AVR with a CAN bus?, Brandon Matthews, 2004/07/26
- Re: [avr-gcc-list] Anyone interface an AVR with a CAN bus?, Reza Naima, 2004/07/26
Re: [avr-gcc-list] Anyone interface an AVR with a CAN bus?, Graham Davies, 2004/07/26